Tools – Wrench – screwdriver – or driver therefor – Rigid jaws
Patent
1984-04-25
1986-02-11
Jones, Jr., James L.
Tools
Wrench, screwdriver, or driver therefor
Rigid jaws
8117615, 81460, 411402, 411910, B25B 1306
Patent
active
045692599
ABSTRACT:
Correspondingly keyed combination of a round-headed bolt fastener and a generally cylindrical socket, preferably for use in securing an automobile wheel cover against theft. The fastener has a plurality of axial slots, or lock impressions, about the periphery of the circular head which may be spaced in accordance with a preselected code. The wrench socket is provided with a corresponding number of key elements projecting inwardly from the cylindrical wall of the socket, the position of the key elements being in accordance with a preselected code. When the key code of the wrench matches the lock code of the fastener, the wrench socket may be slipped over the fastener head with the key elements engaging the lock impressions so that the wrench may tighten or untighten the fastener. The fastener has an axial recess extending from the outer face of the head with an inner beveled surface about the recess opening. The head also has an outer beveled surface extending about its outer periphery which provides a bearing surface for supporting the key elements during rotation of the socket until the matched position of the key elements and the lock impressions is reached. The socket has an axial pin extending flush with the end plane of the socket for alignment with the fastener head recess to guide the wrench during initial engagement with the head. The socket also has an inner angled portion extending between the base of the socket and the axial wall portion which matches the angle of the outer beveled surface of the fastener head. When the socket is in full engagement on the fastener head, the engagement of the central pin in the axial recess and the contact of the angled surface of the socket with the beveled surface of the head serve to stabilize the alignment of the wrench socket on the fastener head during transmission of torque from the wrench to the fastener.
REFERENCES:
patent: 3279838 (1966-10-01), Hamilton
patent: 3449988 (1969-06-01), Gallo, Sr.
patent: 3519979 (1970-07-01), Bodenstein
patent: 3874258 (1975-04-01), Semola et al.
patent: 3878740 (1975-04-01), Gutshall
patent: 4027572 (1977-06-01), Burge
patent: 4109691 (1978-08-01), Wilson
patent: 4125913 (1978-11-01), Lewis
patent: 4242932 (1981-01-01), Barmore
Holly James D.
Marcus John S.
Rubin Sol R.
Bissell Henry M.
Jones Jr. James L.
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