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Title:
ANTI-THEFT VEHICLE SEAT APPARATUS
Document Type and Number:
WIPO Patent Application WO/1993/007025
Kind Code:
A1
Abstract:
An anti-theft vehicle seat apparatus (10) that allows the vehicle seat (90) to be moved from a normal driving position to a forward position. When in the forward position the seat is sufficiently close to the vehicle steering wheel that the vehicle cannot be driven. The apparatus consists of first and second double-sliding track assemblies (12, 14) that move in two increments. The first increment allows the seat to be conventionally placed in a normal driving position and the second allows the seat to be placed in the forward non-drivable position. The invention may be used in combination with a brake compression assembly (60) that includes a seat cavity (62) and a brake compression member (64). The member (64) has a back end (64b) that fits into the cavity (62) and a first end (64a) that has a cavity (64c) sized to encompass the brake pedal. When the vehicle seat (90) is placed in a forward position, the assembly (62) compresses the brake pedal to provide an additional anti-theft safeguard.

Inventors:
BAKER, Franklin, W.
Application Number:
PCT/US1992/008193
Publication Date:
April 15, 1993
Filing Date:
September 25, 1992
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
BAKER, Franklin, W.
International Classes:
B60N2/07; B60N2/08; B60R25/00; (IPC1-7): B60N2/02
Foreign References:
US3650347A1972-03-21
US4796951A1989-01-10
DE2735782A11978-11-02
US2662728A1953-12-15
Download PDF:
Claims:
CLAIMS
1. An antitheft vehicle seat apparatus comprising: a) a vehicle having a floorboard and a vehicle seat, b) at least one doublesliding track assembly where each said assembly comprises: (1) an upper sliding track assembly having a top section that is longitudinally and rigidly attached to the undersurface of said vehicle seat and a bottom section that slides along said top section, (2) at least one lower sliding track assembly having a bottom section that is rigidly attached to the vehicle floorboard and a top section that slides along said bottom section and that is in alignment and rigidly attached to the bottom section of said upper sliding track assembly, c) means for releasing and locking the top section of said upper sliding track assembly in a forward position, and d) means for releasing and locking the top section of said lower sliding track assembly in a forward position when the seat has been moved to a non drivable position to preclude car theft.
2. The apparatus as specified in claim 1 wherein at least one double sliding track assembly is located near a right longitudinal edge of the vehicle seat and at least one double sliding track assembly is located near a left longitudinal edge of the vehicle seat.
3. The apparatus as specified in claim 1 wherein said upper sliding track assembly allows the seat to slide in a forward direction to a position (A) which corresponds to a normal driving position and where said lower sliding track assembly allows the seat to slide to a further forward direction up to a position (B), where a driver is precluded from sitting on the seat.
4. The apparatus as specified in claim 1 wherein said means for releasing an locking the sliding distance of the top section of said upper sliding track assembly is located at the front of said upper sliding track assembly.
5. The apparatus as specified in claim 1 wherein said means for releasing and locking the sliding distance of the top section of said lower sliding track assembly is located at the back of said lower sliding track assembly.
6. The apparatus as specified in claim 1 wherein the top section of said upper and lower sliding track assemblies have a rail extending downwardly and the bottom section of said upper and lower sliding track assemblies have an upwardly facing rail channel that slideably accepts the rail of the upper section of said assemblies.
7. vehicle seat apparatus ving a floorboard and a vehicle seat, b) at least one doublesliding track assembly where each said assembly comprises: (1) an upper sliding track assembly having a top section that is longitudinally and rigidly attached to said vehicle seat and a bottom section that slides along said top •5 section, at least one double sliding track assembly is located near a right longitudinal edge of the vehicle seat and at least one double sliding track assembly is located 10 near a left longitudinal edge of the vehicle seat, (2) at least one lower sliding track assembly having a bottom section that is rigidly attached to the vehicle 15 floorboard and a top section that slides along said bottom section and that is in alignment and rigidly attached to the bottom section of said upper sliding track assembly, 20 c) means for releasing and locking the top section of said upper sliding track assembly in a forward position, d) means for releasing and locking the top section of said lower sliding track 25 assembly in a forward position when the seat has been moved to a non drivable position, e) a means for locking said upper sliding track assembly to said lower sliding track 30 assembly on each double sliding track assemblies when the seat has been moved to the non drivable position (B), f) a seat lockplate having a first double sliding plate and a second double sliding 35 plate sized to substantially cover a back opening that vertically encompasses a seat bottom to the floorboard and horizontally between inside edges of the first and second double sliding plate assemblies, said lockplate having a latch receiving slot centrally located above a lower edge and on each end of an upper section said lockplate further comprising an outwardly extending mounting tab, with attaching means where said tabs are attached, to the respective outward back edge of each upper sliding track top section, g) a latch plate having an outwardly extending latch having a lock slot therethrough sized to extend through the latchplate receiving slot on said seat lockplate, said latch plate rigidly secured to the floorboard by attaching means, and h) a locking means for securing the latch to said seat lock plate.
8. An antitheft vehicle seat apparatus comprising: a) a vehicle having a floorboard and a vehicle seat, b) at least one doublesliding track assembly where each said assembly comprises: (1) an upper sliding track assembly having a top section that is longitudinally and rigidly attached to said vehicle seat and a bottom section that slides along said top section, at least one double sliding track assembly is located near a right longitudinal edge of the vehicle seat and at least one double sliding track assembly is located near a left longitudinal edge of the vehicle seat, 5 (2) at least one lower sliding track assembly having a bottom section that is rigidly attached to the vehicle floorboard and a top section that slides along said bottom section and 10 that is in alignment and rigidly attached to the bottom section of said upper sliding track assembly, c) means for releasing and locking the top section of said upper sliding track 15 assembly in a forward position, d) means for releasing and locking the top section of said lower sliding track assembly in a forward position when the seat has been moved to a non drivable 20 position, e) a means for locking said upper sliding track assembly to said lower sliding track assembly on each double sliding track assemblies when the seat has been moved to 25 the non drivable position (B), f) a seat lockplate having a first double sliding plate and a second double sliding plate sized to substantially cover a back opening that vertically encompasses a seat 30 bottom to the floorboard and horizontally between . inside edges of the first and second double sliding plate assemblies, said lockplate having a latch receiving slot centrally located above a lower edge 35 and on each end of an upper section said lockplate further comprising an outwardly extending mounting tab, with attaching means where said tabs are attached, to the respective outward back edge of each upper sliding track top section, g) a latch plate having an outwardly extending latch having a lock slot therethrough sized to extend through the latchplate receiving slot on said seat lockplate, said latch plate rigidly secured to the floorboard by attaching means, h) a locking means for securing the latch to said seat lock plate and i) a keylock having a key movable latch that moves into a latch slot on said latch plate when said keylock is placed in its locked position.
9. An antitheft vehicle seat apparatus comprising: a) a vehicle having a floorboard and a vehicle seat, b) at least one doublesliding track assembly where each said assembly comprises: (1) an upper sliding track assembly having a top section that is longitudinally and rigidly attached to said vehicle seat and a bottom section that slides along said top section, at least one double sliding track assembly is located near a right longitudinal edge of the vehicle seat and at least one double sliding track assembly is located near a left longitudinal edge of the vehicle seat, (2) at least one lower sliding track assembly having a bottom section that is rigidly attached to the vehicle floorboard and a top section that slides along said bottom section and 5 that is in alignment and rigidly attached to the bottom section of said upper sliding track assembly, c) means for releasing and locking the top section of said upper sliding track .
10. assembly in a forward position, d) means for releasing and locking the top section of said lower sliding track assembly in a forward position when the 5 seat has been moved to a non drivable position, e) a brake compression assembly that is positioned to compress the vehicle brake when the vehicle seat is placed and locked 20 in a most forward position, said brake compressing assembly comprising; 1 ) said seat having a seat cavity located on an undersurface of the vehicle seat in substantial alignment with the 25 vehicle brake pedal, and a brake compression member having a front end and a back end, where the front end further comprising a brake pedal cavity sized to cover a brake 30 pedal and the back end is sized to slideably fit into said seat cavity, such that when said seat is placed and locked in a forward position, said brake compression member compresses a 35 vehicle brake pedal to lock the vehicle wheels to prevent the vehicle from being moved.
11. 10 The apparatus as specified in claim 9 wherein said brake compression member has a length adjusting means.
12. The apparatus as specified in claim 10 wherein said length adjusting means comprises a brake compression member made in two sections, a first section having a set of female threads and a second section having a set of complimentary male threads that are adjustably threaded into the female threads.
13. The apparatus as specified in claim 11 wherein said compression member further comprises a flexible joint that allows said member to correct for any misalignment discrepancy.
14. The apparatus as specified in claim 12 further comprising a spring rigidly attached to the back end of said break compresison member, where when said spring is inserted into said seat cavity an outward force is produced.
15. An antitheft vehicle seat apparatus comprising: a) a vehicle having a floorboard and a vehicle seat, b) at least one single sliding track assembly having a top section that is longitudinally and rigidly attached to an undersurface of the vehicle seat and a bottom section that is rigidly attached to the floorboard and that slides along said top section, and c) a locking and releasing assembly for adjusting the top section of said sliding track assembly, where said sliding track assembly allows the upper section to slide to a normal driving position and to a further forward position (B) where a driver is precluded from sitting on the seat.
16. The apparatus as specified in claim 14 further comprising a means for locking the seat in its nondrivable forward position.
Description:
ANTI-THEFT VEHICLE SEAT APPARATUS

TECHNICAL. FIELD

The present invention generally relates to vehicle anti-theft apparatuses and more specifically to an apparatus that allows a vehicle driver's seat to be moved from a normal driving position to a more forward position that prevents a driver from sitting on the seat. The invention also includes a brake compression assembly that compresses the brake pedal when the seat is in a forward position.

BACKGROUND ART

in recent years many apparatuses have become available that purport to prevent the unauthorized removal of a motor vehicle. The majority of motor vehicles are being produced with steering wheel locks and other theft preventing devices such as electronic devices with audio and visual alarms, ignition deactivation circuits, hidden fuel cutoff valves, external steering wheel locks and other electrically and mechanically operated latches, brackets and bars that clamp the brakes and/or the steering wheel. in all of the above, thieves have found ways to bypass these apparatuses and steal the vehicle. For example, electronic alarms and electrical ignition circuits can be shut off and vehicles may be towed from the back when the steering wheel is locked and only the parking brakes are on.

A search of the prior art did not disclose any patents that read directly on the claims of the instant

invention however, the following U.S. patents were considered related:

PATENT NO. TNVENTOR ISSUED

4,116,297 Ross, et al 26 September 1978 3,650,347 σa pos 21 March 1972

3,028,198 Murr 3 April 1962

The Ross et al patent discloses a vehicle seat lock that locks the forwardly swingable seat back portion of a motor vehicle in a forwardly displaced position in contact with the steering wheel. when the seat back is so displaced, it discourages unauthorized operation of the vehicle. The locking mechanism consists of an elongated extendable and retractable brace that may be locked against retraction.

The Campos patent discloses an automobile safety and anti-theft device consisting of a housing located on the driver's seat between the driver's thighs. The housing contain a key-operated seat lock to lock the driver's seat in a position too close to the steering wheel for a person to occupy the seat. The housing also includes an alarm system that is activated by excessive lurching of the driver's body or attempts to tow away the vehicle by an unauthorized person.

The Murr patent discloses a safety seat catch that latches the seat of an automobile in either a normal driving position or in a forward position. When in the forward position, the seat cannot be occupied so the automobile cannot be driven, thus, preventing the theft of the automobile.

DISCLOSURE OF THE INVENTION

# The anti-theft vehicle seat apparatus is design

) to prevent the unauthorized removal of a motor vehicle

The basic invention consists of two elements: 5 double-sliding track assembly and a means for lockin the assembly. Additionally, the invention may also b used in combination with a brake compression assembly. in most conventional vehicles, a pair of singl sliding track assemblies are located on th

10 undersurface of the vehicle seat. These conventiona assemblies are designed to provide limited longitudina movement. However, the movement is normally sufficien to allow various sizes of drivers to sit on the sea and operate the vehicle. In the Applicant's invention

15 the pair of single sliding track assemblies ar replaced with a pair of the double-sliding trac assemblies. The use of a double sliding track allow the seat to be placed and locked in a normal drivin

.position and also allows the seat to be moved to

20 further forward position, in this further forwar position, the seat is sufficiently close to th steering wheel that even a small driver cannot sit o the seat to drive the vehicle.

The double sliding track assembly consists of a 25 upper sliding track assembly having a top section and bottom section and a lower sliding track assembly als having a top section and a bottom section. The to section of the upper assembly is rigidly attached t the undersurface of the vehicle seat and the botto 30 section of the upper sliding track assembly is rigidl attached to the vehicle floorboard. To complete th integrated assembly, the bottom section of the uppe assembly is rigidly attached to the top section of th bottom assembly.

The inventive double track design allows the movement of the seat to occur in two increments: the first when the upper assembly top section moves with respect to its bottom section and the second increment when the rigidly attached combination of the upper assembly bottom section and lower assembly top section move together with respect to the bottom section of the lower assembly. The first increment allows normal seat positioning and the second allows the seat to be placed in its non-drivable locked position.

The break compression assembly provides the invention with a further anti-theft safeguard. The assembly consists of two items, a seat cavity that is located near the front undersurface of the vehicle seat and a brake compression member. The break compression member has a back end that is sized to fit into the seat cavity and a first end that has a break cavity sized to encompass the break pedal. The member also includes a length adjusting means and a flexible joint to compensate for any alignment discrepancies. when the vehicle seat with the attached break compression assembly is moved to its most forward position, the break compression member compresses the brake pedal to lock the vehicle brakes. in view of the above disclosure, it is the primary object of the invention to provide an anti-theft apparatus that allows the vehicle seat to be placed in such a forward position that a driver cannot sit on the seat to drive the vehicle. It is a further object of the invention to add to the anti-theft function by including a break pedal compression member that compresses on the brake pedal when the seat is placed in a forward position.

It is also an objective of the invention to provide an anti-theft apparatus that: o is reliable and easily maintained, o can be placed in operation by any driver, o can be used as an add-on to an existing vehicle or can be included as original equipment, and o is cost effective from both a consumer and manufacturers point of view.

BRIEF DESCRIPTION OF THE DRAWINGS

IGURE 1 is a side elevational view showing the preferred embodiment of the anti-theft vehicle seat apparatus positioned in a normal driving position. FIGURE 2 is a side elevational view showing the anti-theft vehicle seat apparatus in its most forward position that prevents a driver from sitting on the vehicle seat, FIGURE 2 also shows a second locking assembly that locks the apparatus in the forward non-drivable position.

FIGURE 3 is a side elevational view showing the separate elements that make-up the double sliding track assembly.

FIGURE 4 is a front elevational view of the FIGURE 3 elements.

FIGURE 5 is a typical means that is used for releasing and locking the sliding track assemblies.

FIGURE 6 is a side elevational view showing the preferred first locking assembly that utilizes a seat lockplate in combination with a latch plate to lock the apparatus in the forward non-drivable position.

FIGURE 7 is a back elevational view of the first locking assembly shown in FIGURE 6.

FIGURE 8 is a front view of a hasp lock that is used to secure the seat lockplate of FIGURE 6.

FIGURE 9 is a front view of a keylock that is used to secure the seat lockplate of FIGURE 6.

FIGURE 10 is a front view of a an electrical solenoid and circuit that is used to secure the seat lockplate of FIGURE 6.

FIGURE 11 is a side elevational view showing the second embodiment of the anti-theft vehicle seat apparatus in its most forward position that prevents a driver from sitting on the vehicle seat. FIGURE 11 also shows a locking assembly and a brake compression assembly that is applicable to both the preferred and second embodiment.

FIGURE 12 is a side elevational view of a brake compression assembly that includes a spring that produces an outward force.

RES MODE FOR CARRYING OUT THE INVENTION

The best mode for carrying out the invention is presented in terms of a preferred and a second embodiment. Both embodiments of the anti-theft vehicle seat apparatus are primarily designed to prevent the unauthorized removal of a vehicle.

The preferred embodiment is comprised of the following major elements: a first double-sliding track assembly 12, a second double-sliding track assembly 14, where each assembly consists of an upper sliding track assembly 16 and a lower sliding track assembly 18, a locking and releasing assembly 24, a first locking assembly 30, a second locking assembly 50, a brake compression assembly 60 and a single sliding track assembly 70 that is applicable to the second embodiment. The above inventive elements operate in combination with an existing vehicle seat 90, a floorboard 92, a vehicle battery 94 and a break pedal ?β . The preferred embodiment of the anti-theft vehicle seat apparatus 10 is shown in FIGURES 1-12. As shown in

FIGURE 1, the apparatus 10 allows the vehicle seat 90 to be slid in a forward direction to a position A which corresponds to a normal driving position; or as shown in FIGURE 2, the seat can be slid further forward to a position B where a driver is precluded from sitting on the seat 90. Thus, the car cannot be driven away. in its basic configuration, the apparatus consists of at least one double-sliding track assembly However, preferably a first double sliding track assembly 12 and a second double sliding track assembly 14 are employed.

As shown in FIGURE 4, the first assembly 12 is located near the right longitudinal edge of the seat 90 and the second assembly 14 is located near the seat's left longitudinal edge. Both the first and second assemblies 12,14 consist of an upper sliding track assembly 16 that further consists of a top section 16a and a bottom section 16b. The top section 16a is longitudinally and rigidly attached to the undersurface of the vehicle seat 90 and the bottom section 16b is designed to slide along the top section 16a.

The lower sliding track assembly 18 also includes a top section 18a and a bottom section 18b. The bottom section 18b is rigidly attached to the vehicle floorboard 92 as shown in FIGURES 1 and 2, and the top section 18a is designed to slide along the bottom section. The upper surface of the bottom section 18a is in alignment and rigidly attached to the lower surface of the upper section 16b as shown in FIGURES 1 and 2. Note that since the bottom section 16b is rigidly attached to the upper section 18a, the longitudinal movement of the seat 90 is accomplished in a maximum of two increments; the first increment occurs when the top section 6a moves forward or backward with respect to the bottom section 16b and the second increment occurs when the rigid combination of the bottom section 16b

and top section 18a together move with respect to th bottom section 18a. The maximum forward seat positio B, as shown in FIGURE 2, is only used when the vehicle is to be protected from an unauthorized removal. The basic configuration of the upper and lower sliding track assemblies 16,18 as shown in FIGURE 4, consist of a top section 16a,l8a having a rail 20 that extends downwardly and a bottom section 16b, 18b that have an upwardly facing rail channel 22 that slidably accepts the rail 20.

The sliding distance of the top section 16a of the upper sliding track assembly 16 and/or the top section 18a of the lower sliding track assembly 18 is controlled by a releasing and locking means that preferably consists of a locking and releasing assembly 24 as shown in FIGURE 5. The assembly consists of a rod 26 having a multiplicity of notches 26a and a rod engaging arm 28 having a handle 28a and an equal multiplicity of notch engaging fingers 28b. The arm 28 is normally biased in its engaged position by a spring 28c. The rod 26 is longitudinally attached to the structure of the bottom section 16b or the upper section 18a and the arm 28 is rotatably and respectivelly attached to the upper section 16a or the lower section 18b. As shown in FIGURES 1 and 3, the assembly 16 is positioned so that the arm 28 that controls the upper sliding track assembly 16 extends from the front of the seat 90 and the assembly controlling the lower sliding track assembly 18 is positioned so that it extends from the rear of the seat.

The basic utility of the invention is dependent upon the ability to lock the upper sliding track assembly 16 to the lower sliding track assembly 18 when the seat has been moved to the non-drivable position B as shown in FIGURE 2. Two means for accomplishing the

locking function are presented.

The preferred means as shown in FIGURES 6-1O consists of a first locking assembly 30 that further consists of a seat lockplate 32 and a latch plate 34. • 5 The lockplate is sized to substantially cover a back opening located behind the seat 90. This opening vertically encompasses the bottom of the seat 90a to the floorboard 92 and horizontally between the inside edges of the first and second double sliding plate 0 assemblies 12,14. The plate 32 has a latch receiving slot 32a that is located centrally above its lower edge 32b. on each end of its upper section is located an outwardly extending mounting tab 32c. These tabs are attached by an attachment means, to the respective 5 outward back edge of each top section 6a on the first and second upper sliding track assemblies 12,14.

The latch plate 34 has an outwardly extending latch 34a that includes a lock slot 34b. The lock slot as shown best in FIGURES 6 and 7, is sized to extend 0 through the latch receiving slot 32a on the lockplate 32. The latch plate 34 is rigidly secured to the floorboard 92 by an attaching means that preferably consists of a nut and bolt combination 36 as shown in FIGURES 6 and 7. 5 τo secure the latch 34 to the lockplate 32 several lock means may be employed. As shown in FIGURE 8, a hasp lock 38 may be used where the hasp is placed through the lock slot 34b. in FIGURE 9 is shown a second locking means that employs a keylock 40 that has a key movable latch 40a. in this case, in lieu of a lock slot 34b, a latch notch 34c would be used to receive the movable latch 40a. The third and final locking means as shown in FIGURE 10, consists of an electrical solenoid 42 that is powered and energized by the vehicle battery 94 when a switch 44 is closed. The solenoid 42 is positioned on the seat lockplate 32 so

that when the solenoid is energized, the solenoid ro extends into the lock slot 34b on the latch plate 34.

The second method for locking the upper and lowe sliding track assemblies 16,18 in position B, is accomplished by a second locking assembly 50 as shown in FIGURE 2. This second assembly 50 functions with first lock bore 52 that extends horizontally through and near the end of the bottom section 18b of the lower sliding track assembly 18. The assembly 50 consists of a locking clamp 54 consisting of a forwardly extending upper bar 54a that extends into the rail channel 22 of the upper section 16a of the upper sliding track assembly 16. Extending integrally downward is a bar 54b that connects the upper bar 54a with a backwardly extending lower bar 54c that fits into the channel 22 of the bottom section of the lower sliding track assembly 18. Near the end of the lower bar 54c is located a horizontal second lock bore 54d that is in alignment with the first lock bore 52. To secure the locking clamp 54, the hasp of a lock 38 is placed through the two bores 52 and 54d. hen so secured, the seat cannot be moved from its forward non-drivable position.

To further enhance the utility of the anti-theft vehicle seat assembly 10 a brake compression assembly 60 may be added. The assembly 60 as shown in FIGURES 11 and 12 is positioned to compress the vehicle brake pedal 96 when the vehicle seat 90 is placed in its most forward position. The assembly 60 to function, utilizes two structural members and requires that a means be provided to lock the seat in its most forward position as previously described.

The first member consists of a seat cavity 62 that is located on the undersurface of the seat 90 as shown in FIGURE 11. The cavity should be in substantial alignment with the vehicle brake pedal 96. The second

member is a brake compression member 64 that has a first end 64a and back end 64b. The front end has a brake pedal cavity 64c that is sized to cover the brake pedal 96. The back end is sized to slidably fit into

• 5 the seat cavity 62. To compensate for various lengths, the brake compression member 64 may be made with a length adjusting means 6£ . one such means includes a brake compression member that is made in two sections; a first section 66a having a set of female threads 66b

10 and a second section 66c that has a set of complimentary male threads 66d that are adjustably threaded into the female threads as required to extend or shorten the length of the brake compression member

64. 5 TO further compensate for misalignment discrepancies, a flexible joint 68 may be included in the compression member 64 as shown in FIGURE 11. Also as shown in FIGURE 12, a spring 68 may be rigidly attached to the back end 64b of the brake compression 0 member 64. When the member with the spring is inserted in the seat cavity 62 an additional outward force is provided. Although the brake compression member 60 is particularly suited to be used with the present anti-theft vehicle seat apparatus 10, it can also be 5 used as a separate entity with any vehicle seat.

The second embodiment of the invention covers an anti-theft vehicle apparatus 10 that functions with at least one single sliding track assembly 70 that includes a top section 70a and a bottom section 70b. The top section 70a is rigidly attached to the undersurface of the vehicle sat 90 and the bottom section is rigidly attached to the floorboard 92 and slides along the top section. The assembly 70 is designed to allow the upper section to slide to a normal driving position and to a further forward position B where a driver is precluded from sitting on

the seat 90. A locking and releasing assembly 24 is provided to adjust the sliding distance. This assembly differs in that a handle 28a is provided at each end of the assembly so that the assembly can be manipulated from either end.

A means to lock the top section 70a to the bottom section 70b when the seat is in its non-drivable position is provided. This means may consist of a lock bore 72 that extends horizontally through the bottom section 70b. The bore is positioned near the end of the upper section of the sliding track assembly 70 as shown in FIGURE 11. A pin bore 74 in alignment with the lock bore 72, is extended through the vehicle floorboard 92. to complete the locking means, a lock Pin 76 is procured that has a head 76a and a horizontal slot 76b therethrough. The pin is sized to drop into the pin bore 74. hen so dropped, the pin head 76a is located near the end of the top section 70a and the lock bore 72 and horizontal slot 76b are in alignment to allow a lock 38 to be inserted through the two bores to prevent the seat 90 from being moved from its forward non-drivable position.

While the invention has been described in complete detail and pictorially shown in the accompanying drawings it is not to be limited to such details, since many changes and modifications may be made to the invention without departing from the spirit and the scope thereof. Hence, it is described to cover any and all modifications and forms which may come within the language and scope of the claims.