Background Art A brief description of a reciprocative device includes a basic door closer system which is controlled with liquid or gas. The device generally contains a piston assembly including a piston and sealing o-ring; piston rod varieties which include diametrically curved and non- curved surfaces; internal compression spring and hydraulic biasing operators; cylindrical piston body; sealed and non-sealed end caps; fluid restriction valves; a checking mechanism; and attachment mechanisms including the doorjamb bracket concerning this invention. Such reciprocating door closer systems are described in U. S. Pat. Nos. 2,920,338; 3,032,806; 3,665,549; 4,194,264; 4,382,311,4,648,151, and Canadian Pat. No. 623,038.

The doorjamb bracket is usually manufactured from a single piece of steel which is metal stamped into a distinct and functional configuration. The doorjamb bracket provides surface clearance for the door closer system, away from surface of the door and the doorjamb. It also provides a remote hinging area for securing the reciprocating piston rod of the door closer system onto the doorjamb bracket. There are two main components which normally comprise the prior art doorjamb bracket; a) an arm structure, and b) a basal structure.

Prior art component a) the arm structure, is several inches in height and often resembles a flattened triangle design, however may also comprise other different configuration designs.

Two holes which are opposed and aligned support the remote hinging area. The door closer piston rod is fixated onto the remote hinging area with a pivot fastener pin. Whenever the door is opened or closed, the secured piston rod reciprocates from within the door closer body and pivots at the remote hinging area.

Prior art component b) the basal structure, provides both stabilization and a fastening means for the doorjamb bracket. The basal structure averages about 2.28" square (57.93 mm square), and normally provides four fastener screw holes for fixating onto a doorjamb surface.

The basal structure is often required to be fixated proximal to the exterior edge of the doorjamb. This requirement is necessary to permit maximum door swing, and is normally standardized criteria for most reciprocating door closer systems.

Lateral forces and pressure generated by the functioning door closer system onto the doorjamb bracket is determined by the continual reciprocating action whereby the system was designed, and by the forces of the attached door. It is then common that the pressure demand applied onto the doorjamb bracket is greater than the basal structure can withstand. When fixated onto the typical doorjamb comprising a 3/4" (19 mm) thick softwood pine board, the doorjamb bracket is often loosened or detached. The damaging results include an enlarging of the screw holes on the wooden doorjamb, sometimes even creating a gross splintering of the wood itself.

There are several impractical solutions to combat this loosening and detachment problem of the doorjamb bracket from atop the doorjamb. The simplest method of solution involves the insertion of thicker wooden screws into the enlarged wooden holes. This usually results in only a temporary solution as the wooden fastener screw holes eventually again wear bigger.

Another method of solution involves the relocation of the doorjamb bracket proximal to the existing worn area, without moving the entire door closer system itself. However, if the door- jamb bracket is relocated inward towards the center of the doorjamb, maximum door swing is compromised due to the position requirement of the basal attachment area, proximal to the exterior edge of the doorjamb. If the relocation of the doorjamb bracket is either up or down from the worn holes, the result is a horizontal tilting of the door closer system. Another more complicated yet permanent solution involves the complete relocation of the entire door closer

system. However, because the placement of the door closer system is limited upon the doorjamb and the installation procedure is somewhat difficult, this solution is not entirely preferred. Therefore, a loosened or detached doorjamb bracket often results in the removal of the deemed annoying door closer system.

Disclosure of The Invention The invention, a basal attachment plate, comprises an apparatus and methodology which will permit an improved mounting and securement of the doorjamb bracket atop the doorjamb.

The invention could retrofit most prior art doorjamb brackets without the need to substantially modify the doorjamb bracket design. The could substantially eliminate loosening and unwanted detachment of the doorjamb bracket from atop the doorjamb. Usage of the invention could permit mounting a doorjamb bracket over enlarged or worn wooden screw holes causing damaged to the doorjamb. The invention substantially eliminates door closer repairs comprising the usage of thicker wooden screws to mount the doorjamb bracket, the relocation of doorjamb bracket away from damaged wood, or the removal and relocation of the entire door closer system.

Furthermore, the basal attachment plate can be designed to secure the doorjamb bracket without the need to permanently fixate the bracket onto the doorjamb. This would allow for the complete removal of the doorjamb bracket to temporarily widening the overall entryway for passage of large items such a furniture and appliances. The invention comprises three main superior components: a) a plate; b) a chambered area; and c) a slotted means.

Superior component a) the plate area, incorporates a larger surface area than the surface area of the basal structure comprising the prior art doorjamb bracket. An object of the invention is to provide a greater area for distribution of the pressure transferred from the functioning the door closer system, onto the basal structure of the doorjamb bracket. Another object of the invention is to accommodate for a greater fastener area unto the doorjamb.

Another object of this invention is to reattach a doorjamb bracket atop a damaged doorjamb.

For fixation and pernancy atop the doorjamb, the plate area may comprise a greater fastener means selected from the group comprising screw holes, an adhesive attachment, and a prefabricated plate within the doorjamb. Another object of the invention is to provide a fastener area greater than the existing basal structure comprising the doorjamb bracket.

Another object of this invention is to substantially eliminate loosening and unwanted detachment of the doorjamb bracket. Another object of this invention is to permit reattachment of the doorjamb bracket onto a damaged doorjamb, without having to relocate the doorjamb bracket or move the entire door closer system.

Superior component b) the chambered area, communicates with basal structure of the doorjamb bracket. An object of this invention is to provide a secure union for the basal structure without the need to permanently fixate the doorjamb bracket. Another object of this invention is to accommodate the basal structure for prior art doorjamb brackets of various sizes and shapes. Another object of this the invention is to universalize the mechanism to various different door closer devices known.

Superior component c) the slotted means, communicates with the arm structure and basal structure of the doorjamb bracket. The slotted means comprises a primary slot which allows the doorjamb bracket to protrude from the basal attachment plate. An object of this the invention is to retrofit the doorjamb bracket without the need to substantially modify it's design or concept. The primary slot is positioned at a predetermined location away from the edges of the basal attachment plate and the chambered area. An object of this improvement is to accommodate the necessary distance of the doorjamb bracket, proximal to the exterior edge of the doorjamb. Another object of this improvement is to provide an easy guide for installing the doorjamb bracket onto the doorjamb. Another object of this invention is to maintain a predetermined distance for the basal structure away from the exterior edge of the doorjamb.

The slotted means may comprise an optional secondary slot. An object of this invention is to allow for easy removal of the doorjamb bracket from the basal attachment plate without the need to remove the permanent fasteners. Often the movement of large objects such as furniture or appliances through the doorway require removal of the doorjamb bracket.

Because the slotted means may be located at minimal distances from the edge of the basal attachment plate, a reinforcement may be added on the edges of the slotted means. An object of this improvement is to provide strength for the area, which may realize certain forces and pressures during the function of the reciprocating door closer system.

All superior components comprising the superior basal attachment plate may be created in various sizes and shapes necessary to accommodate specific doorjamb brackets and door closer designs. An object of this the invention is to universalize the mechanism to various different door closer devices throughout the world.

Brief Description Of The Drawings Fig. 1 is a prospective view of the superior basal attachment plate, shown with a typical prior art doorjamb bracket in position for mounting unto the invention.

Fig. 2 is a prospective view of the superior basal attachment plate shown with a properly mounted prior art doorjamb bracket, and placed in a predetermined position proximal to the exterior edge of a wooden doorjamb.

Fig. 3 is a prospective view of a superior basal attachment plate comprising a secondary slot on the interior edge of the embossment chamber, shown with a doorjamb bracket both in position for mounting, and mounted unto the invention.

Fig. 4 is a prospective view of a superior basal attachment plate designed with a thicker material composition and an adhesive fastener, and shown with a mounted doorjamb bracket.

Fig. 5 is a prospective view of a superior basal attachment plate including a prefabricated chambered area on a metal doorjamb, shown with a doorjamb bracket in position for mounting unto the invention.

Fig. 6 is a reference list.

Best Modes For Carrying Out The Invention Fig. 1 is a prospective view of the basal attachment plate 10 comprising an apparatus stamped or molded of material selected from the group of natural or synthetic fibers, metals, or plastics. The plate area 11 is supported by five fastener screw holes 12-A, contributing to a greater fastening means 12. An embossment chamber 14-A of predetermined dimension is provided. The exterior edge 16 provides an angular bend reinforcement 18-A. A primary slot 20-A of a predetermined size and location is positioned proximal to the exterior edge 16.

Positioned underneath the plate area 11 is a prior art doorjamb bracket 26, stamped from sheet steel. The bracket 26 comprises a basal structure 28 providing four fastener screw holes 30 and an arm structure 32 of a triangle design. A remote hinging area 34 is provided for attachment of a reciprocating door closer rod (not shown). The doorjamb bracket 26 is shown in position to mount unto the embossment chamber 14-A of the basal attachment plate 10.

Fig. 2 is a prospective top view of the basal attachment plate 10 including the doorjamb bracket 26 positioned underneath, shown atop a wooden doorjamb 36-A. The embossment chamber 14-A is securing the basal structure 28 of the doorjamb bracket 26. Protruding from the primary slot 20-A is the arm structure 32, also of the doorjamb bracket 26. The plate area 11 is properly positioned atop the wooden doorjamb 36-A, at a predetermined location proximal to the exterior edge 38. Therefore, the doorjamb bracket 26 is also in proper position atop the wooden doorjamb 36-A. A fastener screw is positioned to attach the fastener screw hole 12-A onto the wooden doorjamb 36-A. Note that the fastener screw holes 30 of the door- jamb bracket 26 are not used to fixate unto the wooden doorjamb 36-A.

Fig. 3 is a prospective view of a basal attachment plate 10 providing a secondary slot 20- B, located on an interior edge 17 of the embossment chamber 14-A. A doorjamb bracket 26 is positioned to mount into the embossment chamber 14-A, and also shown mounted within the embossment chamber 14-A. The mounting procedure involves engaging the basal structure 28 into the secondary slot 20-B, while the arm structure 32 is guided into the primary slot 20-A, until the basal structure 28 is secured or snapped into the embossment chamber 14-A. Removal of the doorjamb bracket 26 is conducted in the reverse order of the mounting procedure, without the need to unfasten the plate area 11 from atop the doorjamb (not shown). Note that the fastener screw holes 30 are not necessary to fixate the doorjamb bracket 26.

Fig. 4 is a prospective view of another basal attachment plate 10 which demonstrates an adhesive fastener. A thicker material structure such as laminated metal or plastic, permits a hollowed chamber 14-B. The exterior edge 16 also accommodates an additional material reinforcement 18-C. A doorjamb bracket 26 is securely mounted underneath the hollowed chamber 14-B, demonstrating the arm structure 32 protruding from the primary slot 20-A.

Fig. 5 demonstrates a prefabricated chambered area 14-C install in a metal doorjamb 36- B. The exterior edge 16 accommodates a gusset reinforcement 18-B. The doorjamb bracket 26 is shown in position to properly mount unto the primary slot 20-A and the secondary slot 20-B of the basal attachment plate 10. Note that the prefabricated chambered area 14-C is created by the plate area 11 the metal doorjamb 36-B.

Superior component a) the plate area 11, provides a greater area than the basal structure 28 of the doorjamb bracket 26. The dimensions of the plate area 11 are predetermined to provide a substantially greater area than the basal structure 28 of the doorjamb bracket 26. Therefore, securement onto the doorjamb 36 is substantially improved, whereby certain forces and pressures generated by the door closer system and the door are better distributed by the basal attachment plate 10. Furthermore, the plate area 11 is able to tolerate an improved fastening means 12, consisting of more fastener screw holes 12-A, or a larger adhesive fastener 12-B, or a prefabricated area such as with a metal doorjamb 36-B. When attempting to reattach a doorjamb bracket 26 onto a wooden doorjamb 36-A whereby the fastener screw holes 30 have loosened or detached, the basal attachment plate 10 compromises the procedure. Because the plate area 11 provides its own fastening means 12, reinstallation of the doorjamb bracket 26 over a worn area is possible.

Superior component b) the chambered area 14, provides an area of securement for the basal structure 28 of the doorjamb bracket 26. The chambered area 14 permits a secured union between the basal structure 28 and the surface of the doorjamb 36, without stressing the plate area 11, and without stressing the fastening means 12. The chambered area 14 further permits that the doorjamb bracket 26 need not be permanently fixated onto the doorjamb 36. Therefore, the chambered area 14 provides adequate stability and fixation onto the doorjamb 36. The chambered area 14 may consist of an embossment chamber 14-A when stamp-manufacturing the invention from steel, or a hollowed chamber 14-B when manufacturing the invention from a molded or laminated material, or a prefabricated chambered area 14-C constructed within a metal doorjamb 36-A. Other similarly created designs may be suitable to provide the chambered area 14.

Superior component c) the slotted means 20, comprises a primary slot 20-A which accommodates the arm structure 32 of the doorjamb bracket 26. The arm structure 32

protrudes from the surface of the chambered area 14. The size and shape of the primary slot 20-A may vary to retrofit various the arm structure 32 designs without the need to substantially modify prior art doorjamb bracket 26 design or concept.

Insertion of the doorjamb bracket 26 into the chambered area 14 and the slotted means 20 may occur in two different methods. The first method involves the insertion from the underside of the basal attachment plate 10 until the basal structure 28 is secured within the chambered area 14. Insertion of the doorjamb bracket 26 must occur prior to the fixation of the plate area 11 onto the doorjamb 36. However, this method does not permit the removal of the doorjamb bracket 26 without first detaching the fasteners 12 from atop the doorjamb 36.

The second method of insertion for the doorjamb bracket 26 includes communicating the basal structure 28 within an embossment chamber 14-A through a secondary slot 20-B provided along any edge of the embossment chamber 14-A. There are four edges which create the embossment chamber 14-A. Therefore, there are four edges which may accommodate the secondary slot 20-B. The preferred location for the secondary slot 20-B may comprise the interior edge 17 of the embossment chamber 14-A which is perpendicular to the primary slot 20-A. The interior edge 17 provides the most clearance for the removal procedure of the doorjamb bracket 26 from atop the doorjamb 36. It allows the invention to remain universal to either a right-handed or left-handed doorjamb 36. Furthermore, placement of the secondary slot 20-B on the exterior edge 16 may hamper the removal of the doorjamb bracket 26 from the basal attachment plate 10 by interfering with the edge of the door structure (not shown). The interior edge 17 of the embossment chamber 14-A may also include a keeper or lip for additional resistance and securement for the basal structure 28.

Lateral forces generated by a functioning door closer system and attached door applied onto the remote hinging area 34 of the doorjamb bracket 26 results in a transferred pressure onto the edges of basal structure 28. This notion is what permits the doorjamb bracket 26 to properly function from within the embossment chamber 14-A comprising a secondary slot 20- B, without loosing securement from atop the doorjamb 36.

Because the chambered area 14 and the slotted means 20 are often located proximal to the exterior edge of the plate area 11, certain pressures and varying forces which are generated

by the door closer system and the attached door may cause the exterior edge 16 to become stressed. To compensate for the stress, the exterior edge 16 is strengthened with an exterior edge reinforcement 18 consisting of an angular section of material 18-A, a gusset 18-B, and an additional material 18-C added the exterior edge 16.

Industrial Applicability The present invention may be incorporated to substantially door closer system loosening and detachment of the doorjamb bracket from atop the doorjamb. The basal attachment plate permits an improved securement and attachment of the doorjamb bracket onto a surface, even when reattaching atop a worn fastening area. The invention may also be utilized for removal of the doorjamb bracket from the doorjamb to widen the doorway. Moving larger objects such as furniture often requires the removal of the doorjamb bracket. The preferred embodiments of this invention substantially eliminates these problems. Conclusively the reader will understand that the complete reciprocating door closer system is substantially improved by the preferred embodiments of these inventions.

Although the description above contains many specifications, these should not be construed a limiting the scope of the invention but as merely providing illustrations of the some of the preferred embodiments of this invention. For example, the invention can be modified to any size and shape, used for other reciprocating operative device doorjamb brackets such as cabinetry closer systems, commercial closer systems, and reciprocating industrial equipment.

Thus, the scope of the invention should be determined by the appended claims and their legal equivalents, rather than the examples given. All such claims and inventions are intended to be included therein.