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Document |
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4170918 |
Theft-prevention screw fastening
A nut or bolt which requires a special tool for its removal. The engaging elements of the nut or bolt and the manipulating tool consisting of matching spline ways and pins which function as...
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4164967 |
Screwdriver
A screwdriver for screws having two spaced head recesses. The screwdriver comprises tang with two ends; a handle attached to a first end of the tang; two spaced driving prongs attached at a second...
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4149434 |
Screw and screwdriver therefor
A screw having an annular socket formed concentrically in the outer surface of its head, with at least a pair of radial walls in said socket, and adapted to be used with a pair of special tubular...
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4095492 |
Radiator cap turning tool
A radiator cap gripping and turning tool having a stiff and flexible steel band formed in a loop, the ends of which are pivoted to a bar shaped link, upon which a handle is carried, the handle...
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4092882 |
Water closet flange wrench and puller
The invention is a water closet flange wrench and puller comprising a base element having alignment means on each end, and having a pair of line-up studs which are attached to the bottom surface of...
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4027572 |
Theft-prevention screw fastenings
A nut or bolt which requires a special tool for its removal. The engaging element of the nut or bolt and the manipulating tool consisting of matching dowel holes, and pins which also function as...
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4025140 |
Locking device for the prongs of an electrical plug
In one embodiment a protective housing adapted to be locked upon and cover a prong of an electrical plug is disclosed. The housing has a chamber to receive a prong of the plug and has a collared...
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3861770 |
LOCK ASSEMBLY AND TOOL
The lock assembly comprises a hollow cylinder closed at one end and open at the other end and a hollow cylindrical insert member which is inserted therein, and internally threaded. The cylinder and...
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3821975 |
AUTOMOTIVE WHEEL LOCK MEANS
An automotive wheel nut has a frusto-conical periphery and in its outer end face has a pair of wrench receiving openings of different diameters and spaced angularly at oblique angles. A wrench...
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3695321 |
CAVITY HEAD SCREW AND DRIVING TOOL THEREFOR
The upper surface of the head of a screw has wedge-shaped cavities arranged on either side of, or around, a central hub or land. The cavities have undercut sidewalls, and the land has a central...
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3492841 |
THREADED NUT LOCK
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3470786 |
TURNABLE DEVICES
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3325899 |
Dental handpiece and collet wrench therefor
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3302672 |
Screw driving tool
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3241408 |
Vehicle wheel nut or bolt
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3174383 |
Sealing devices for vending machines and like applications
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3134292 |
Irretrievable screw
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3106862 |
High torque fastener
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3073206 |
Cap screws with replaceable inserts
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2956461 |
Wrench for plumbing fixtures
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RE07124 |
Title is not available
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3564949 |
Title is not available
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