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JP2003139115 |
To provide a cross recessed screw easily tightened to a screw fastening torque set beforehand and used even for a relatively shallow driving recess.This engagement groove 11 forms a driving recess 10 with which a screwdriver bit 20 engag...
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JP2003130022 |
To prevent a screw from coming-out of a driver bit to the outside without pushing the screw.A bit fitting groove 3 capable of fitting in and pulling out an edge portion 2 of the driver bit B is provided on a screw head portion. A fitting...
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JP2003056534 |
To fasten a screw at a high fastening torque by suppressing damages to a fitting projection part provided in a screw member, even if the screw member is made of aluminum alloy. In a cross section which is perpendicular to a central line ...
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JP3391709 |
To strictly and easily set the protruded quantity of a driver bit from a threadedly engaged quantity adjusting tool that threadedly engages a screw flush with a surface to be threadedly engaged such as floor and wall surfaces. This adjus...
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JP2003013924 |
To provide combination of a screw and a driver bit, and a header punch for manufacturing a screw capable of effectively preventing the come out phenomenon of a driver bit, preventing a screw from being broken like conventional cases, ach...
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JP2003011071 |
To provide a driver bit and screw capable of preventing conventional breakage of the screw by improving the constitution of a bit tip part fitted into a cross groove in a screw head and allowing the bit tip part to apply a vertical force...
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JP2002372020 |
To provide a screw and a screw driver capable of preventing crushing of a screw hole. A plurality of projections 1 having the same shape tips are arranged across grooves 2 at an equal interval in the screw driver and the screw is provide...
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JP2002364618 |
To provide a screw part and a tightening tool for the screw part capable of tightening the screw part, using a general-purpose tightening tool, also using an exclusive tightening tool without causing its coming out. A drive shape 3 compo...
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JP2002346941 |
To provide a titanium alloy tool that suppresses an increase in manufacturing cost, has high hardness and wear resistance and has high toughness and elasticity, in a titanium alloy tool such as cutting pliers and a wrench manufactured by...
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JP2002346942 |
To retard a cam-out phenomenon in any situation at screw driving. Engaging projections 12 are provided with a rake angle inclined forward on the point side and backward on the base side in relation to an axis 14 of a shank part 11 when t...
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JP2002346841 |
To provide a clamping device which can quickly, easily clamp a threaded rod with repeatable high accuracy. The clamping device for clamping the threaded rod 20, which is used as an electrode for eroding a thread, so as to be fixed and no...
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JP2002337059 |
To provide a tool capable of performing high speed rotation for screw loosening and fastening.This tool is provided in the center thereof with a portion for attaching a core of a screw driver, and a commercially available screw driver ca...
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JP2002321160 |
To provide an apparatus to prevent an excessive impact from being transmitted to the mating part of the screwdriver shaft and the screw head when the screw is tightened or loosened.Concerning the shaft of the screwdriver used for screwin...
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JP2002321159 |
To provide an effective and comparatively multi-purpose tool for fixing a small article in a worker's handwork.Since the screwing tool for fixing a small article is so constituted that on the ring shape body 10 a part of which is chopped...
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JP2002301667 |
To provide a screwdriver bit with a chamfer cutter capable of improving the efficiency of chamfering and fastening work by forming a shape wherein a conical chamfer cutter 3 is attached to a cross head bit 2 at the tip part of a shaft 1 ...
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JP2002266827 |
To provide a screw and driver firmly fastenable even with a small rotating force and easily releasable by surely engaging the fitting groove of the screw to the fitting edge part of a driver bit even in a fine screw as a screw for eyegla...
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JP2002254331 |
To faciltate a view of the tip of a bit, improve workability and enable use in a restrictive place by reducing the thickness of an operating cylinder of a socket.A tip portion of a tool shaft 1 has the socket 2 to which the bit 9 is remo...
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JP2002239938 |
To provide a pen type screwdriver that is improved so as to be housed and stored in a pocket on an operator.The pen type screwdriver comprises a rodlike body 2 of electrically insulating material, a driver bit 3 projected in an axial dir...
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JP2002239937 |
To integrate various bits with a screwdriver for convenient portability, and keep the size of a grip intact for easy grip.The grip part 1 is cut open in a lower end and bored deep, and is used as a cover. A screwdriver body 3 is cut open...
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JP2002224969 |
To provide a screwdriver and a method for screw driving using it which can drive a screw and precisely adjust screw driving depth at the same time.This invention is related to a screwdriver which has a cylindrical holder 1, a bit holder ...
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JP2002205281 |
To provide a bit mounting device with a highly durable bit deflection stopper for solving the problem with low durability in such a conventional structure of a screwdriver that a rubber ring is mounted in a bit mounting hole so that a sc...
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JP2002205280 |
To provide a bit to be attached on a revolving tool such as an electric revolver by furnishing sufficient strength and favorable overload absorbing force.A bit body 6 is continuously provided on the revolving tool such as the electric re...
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JP2002178271 |
To provide a crank type screwdriver capable of speedily fastening and loosening a screw by one hand.This crank type screwdriver constitutes its characteristic feature of manufacturing a crank form made of a holding part 3 in rotating the...
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JP2002160174 |
To provide a screwdriver capable of setting a tip part at any angles for easy tightening and loosening of a screw in narrow space.A screwdriver tip part 1 can be changed at a screwdriver tip set part 2 and the screwdriver tip set part 2 ...
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JP2002160173 |
To enable easy tightening or removal of a screw having a crushed head groove or the like during or after tightening various screws, screw spikes or bolts.In a screwdriver 6 having a holding member 5 at a rear part 4 of a screwdriver shaf...
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JP3307835 |
To permit sure positioning even when anybody works it by a method wherein a notch, whose upper part is opened, is provided at a position opposed to the screw of connecting part of a reinforcing rib while the shaft of a driver is penetrat...
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JP3294217 |
To provide a portable type screwdriver for spectacles suitable for fastening of multiple nuts with different diameter. The screwdriver comprises a screwdriver main body 10 provided with paired screwdriver shaft parts 14, 15, a first cyli...
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JP3285380 |
PURPOSE: To develop screwing tool capable of transmitting suitable torque according to the size of a screwing tool and capable of being easily manufactured. CONSTITUTION: A screwing tool, particularly a screwdriver or a screwing bit, for...
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JP2002069568 |
To provide tool steel having low decarburizing properties in which ferrite decarburization is suppressed, and surface hardness and fatigue strength are improved.This tool steel having low decarburizing properties has a composition contai...
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JP2002066939 |
To hardly crush a central part of a Y-type slot screw into a circular cone during screwing and unscrewing by forming a wide or 120° interior angle between slots of a screw head, and increase the thickness of each projection slightly to ...
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JP3284023 |
PURPOSE: To make an operator dispensable with any trouble to carry around a tool such as a plier or the like separately in order to extract a driver bit of a screwdriver, and further to prevent a removed adjust sleeve from being missing....
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JP2002052475 |
To provide an insulated screwdriver manufacturing method, its manufacturing die and an insulated screwdriver for improving safety by minimizing metal exposed portions hardly to let short-circuit accidents happen.This manufacturing die K ...
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JP2002036131 |
To provide a screw tightening device capable of automatically tightening a screw in the direction inclined to the direction of the screwing axis without any defective engagement.A drive shaft 15 comprises a large diameter part 15a and a ...
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JP2002036134 |
To provide a screw driver device which can considerably suppress the wear of a dust-proof member, easily and rapidly be changed without requiring any special drawing-out tool, and reliably prevent the dust from reaching between a bit hol...
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JP3271868 |
PURPOSE: To provide a screw with recess having a high abrasion resistance to the tip of a tightening tool by inclining a surface for forming a side wall of the recess for a specific angle to an axial line of the screw, composing a star-s...
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JP2001357702 |
To provide a light emitting shaft fixture which is removably equipped with a variety of goods such as a driver and a spoon or the like and is made very attractive by being even equipped with a light emitter that is lighted linked with th...
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JP2001353664 |
To provide a socket wrench in which the wrench can be easily used corresponding to a using place by two-splitting a handle to let both split handle parts be relatively rotatable to each other around the axial center of the handle.In this...
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JP2001347467 |
To provide a driver bit capable of sufficiently relieving the impact in fastening with simple working.As a bit shaft 3 is provided with a hollow part 5 formed by a through hole 6, the impact received in the completion of fastening can be...
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JP2001328074 |
To provide a driver bit capable of surely transmitting the driving force without displacing a working position in fastening and driving a screw into an engagement groove.As this driver But for a cross-recessed head screw is manufactured ...
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JP2001310266 |
To provide an epoch-making screwdriver with high commercial value.A chuck part 4 of a large diameter screwdriver body 3 provided with a large diameter bit part 2a continuously to a large diameter base body 2 is provided in a grip 1 at on...
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JP2001300860 |
To provide a driver bit for obtaining a shape coinciding with an engaging groove of a screw and for reliably transmitting driving force. In this driver bit for a cross recessed screw, a vane part 10 capable of being engaged with an engag...
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JP2001277142 |
To provide a blade lever replaceable hand driver holding a blade lever certainly in a handle body, and facilitating recognition of the blade lever suitable for a screw to be used and screw fastening. The hand driver comprises the blade l...
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JP2001277144 |
To solve problems that when a screwing work is performed using a conventional driver a connecting string linked to the rear end of a handle part of a driver is gradually twisted and wound about the handle part to make the screwing work d...
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JP2001269490 |
To provide a tool made of ceramics which prevents the occurrence of accidents caused by short circuits between wires even in the case of performing work between very tight wires in a distribution board or the like while maintaining hot w...
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JP2001269873 |
To provide a screwdriver bit having a shape matched with the coupling groove of a screw and reliably transmitting driving force. A blade part 10 having a cross-shaped cross section couplable with the coupling hole 20 of the screw 2 is fo...
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JP2001246571 |
To provide a screw fastening device capable of rotating a screw fastener fitted to the shape of the head part of a screw without causing any axial slippage.This device comprises the screw fastener 7 formed cylindrically except the tip an...
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JP3229663 |
PURPOSE: To ensure efficient and balanced torque transmission by securing a sufficient depth of bit engagement of a driving tool. CONSTITUTION: A recessed drive socket 10 in a fastener or the like, is driven by a mating, drive tool 14 re...
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JP2001232574 |
To machine a prepared hole for attaching a screw and a bolt and perform the work for screwing the screw and the bolt after that by one member.An engaging projecting part engageable with an engaging groove formed in head parts of the scre...
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JP2001225277 |
To provide a plus-minus integral driver that can integrate a plus driver and a minus driver to reduce time required shifting the driver and to reduce the number of tools required for work and can make the rapid changeover between the plu...
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JP2001219381 |
To remove and/or reuse a head end part of a bit which is fitted on a head part of a machine screw, a bolt, etc., in the case of installing and removing it and a plus groove provided on the head part of which is crushed when an edge of a ...
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