Abstract A wrench tool, such as a T wrench, including at least one wrench socket which can receive insertion into its recessed interior of a fastener-head of either of two types which differ from each other in shape and/or size and to engage the inserted head with an appropriate amount of torque-imparting contact between portions of the socket''s interior surfaces and corresponding portions of outside surfaces of the head for it to be able to impart substantially as much torque thereto as it would be able to impart to a fastener head of the other type should that head, instead, be inserted into the socket. The recessed interior of the socket comprises: (1) an entrance-portion which extends into the socket for a distance d from its plane of entrance; and (2) a deeper-lying-portion which extends for a distance d'' from the bottom of the entrance portion to the bottom of the recessed interior of the socket. The entrance-portion can receive insertion of a fastener-head of either of said two types and thereupon contact portions of exterior torque-receiving surfaces thereof with portions of its interior torque-imparting surfaces comprised in a respective one of two different groups thereof, but, depending upon the extent to which said heads differ from each other in shape and/or size, the sums of the areas of the head-contacting and torque-imparting surfaces comprised in the subdivisions included respectively in said two different groups thereof may be substantially unequal. To compensate for this the socket is so formed that any inserted fastener-head of the type which the entrance-portion is able to engage with substantially more of its torqueimparting interior-surface areas than it can a head of the other type is prevented from being inserted into the socket beyond the bottom of the entrance-portion whereas a fastener-head of the other type, after it has been fully inserted into the entrance portion, will be free to move more deeply into the socket and, if this fastener-head is long enough, to be fully inserted into the more-deeply-lying portion for its full depth d'' whereupon it will be engaged by additional torque-imparting interior surfaces of that portion. The ratio of (d plus d'') to d is such that, due to the additional torque which can be imparted in this manner to a fastener-head of said other type by interior surfaces of the deeper-lying-portion, the socket is able to apply substantially equal amounts of torque to fastener-heads of the two types.
Inventors
👤 Harold Gustave Erm
Bibliographic Details
Application Number—
JurisdictionUS
Data Sourcegoogle_patents
Last Synchronized2026-10-24 08:37
CPC Classifications
B; B25; B25B; B25B13/00; B25B13/02; B25B13/06
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
488 words
A wrench-socket which is adapted to receive insertion into its recessed interior of a fastener-head of either of two different types, such as of different shapes and/or sizes, and to thereupon engage the inserted head with substantial torqueimparting contact between portions of interior surfaces of the socket and corresponding portions of outside surfaces of said head CHARACTERIZED IN: that said recessed interior of the socket comprises (1) an entrance-portion which extends over a distance d between the plane of entrance of the socket and a bottom-plane which is parallel thereto and contains a plurality of shoulders for preventing fastenerheads of one of said two types from being more deeply inserted into the socket than said bottom-plane and (2) a deeper-lying-portion which extends over a distance d'' between said bottom-plane and the bottom of the recessed interior of the socket; that said entrance-portion is adapted to receive insertion of a fastener-head of either of said two types as deeply as to said bottom-plane and to thereupon engage that head with a respective one of two different predetermined amounts of torque-imparting contact between portions of its interior surfaces and corresponding portions of outside surfaces of the inserted head and that, to that end, said entrance-portion comprises two different groups of peripheral subdivisions of its torque-imparting interior surfaces which are respectively adapted to closely-contact and thereby to engage in torque-imparting-relationship corresponding groups of torque-receiving peripheral subdivisions of exterior surfaces of fastener-heads of said two different types; that said deeper-lying-portion comprises interior surfaces which are adapted to closely-contact and thereby to engage in torqueimparting-relationship exterior surfaces of inserted heads of only the other of sad two types; that some of said group of subdivisions of interior surfaces of said entrance-portion which are adapted to contact exterior surfaces of fastenerheads of said other type are so alligned with predetermined portions of said interior surfaces of said deeper-lyiNg-portion that a fastener-head of said other type upon being inserted into said entrance-portion is guided therethru past said shoulders and into the deeper-lying-portion whereby interior surfaces of both portions (1) and (2) of said recessed interior of the socket will engage that head in torque-impartingrelationship; that the sum of the areas of all torque-imparting surfaces comprised in the group of peripheral subdivisions of the entrance-portion which are adapted to engage a head of said other type comprises a substantially smaller percentage of the sum of all torque-imparting surfaces comprised in said entrance-portion than the percentage thereof comprised in the sum of the areas of all of said surfaces of said other group of peripheral subdivisions of the entrance-portion; and that the ratio of (d plus d'') to d is large enough, in proportion to the relative smallness of said substantially smaller percentage for said deeper-lying-portion to contribute enough additional torque-imparting contact to an inserted head of said other type to enable the socket to impart substantially equal amounts of torque to fastener-heads of said two types.
Claim 2
Dependent Claim
488 words
A wrench-socket which is adapted to receive insertion into its recessed interior of a fastener-head of either of two different types, such as of different shapes and/or sizes, and to thereupon engage the inserted head with substantial torqueimparting contact between portions of interior surfaces of the socket and corresponding portions of outside surfaces of said head CHARACTERIZED IN: that said recessed interior of the socket comprises (1) an entrance-portion which extends over a distance d between the plane of entrance of the socket and a bottom-plane which is parallel thereto and contains a plurality of shoulders for preventing fastenerheads of one of said two types from being more deeply inserted into the socket than said bottom-plane and (2) a deeper-lying-portion which extends over a distance d'' between said bottom-plane and the bottom of the recessed interior of the socket; that said entrance-portion is adapted to receive insertion of a fastener-head of either of said two types as deeply as to said bottom-plane and to thereupon engage that head with a respective one of two different predetermined amounts of torque-imparting contact between portions of its interior surfaces and corresponding portions of outside surfaces of the inserted head and that, to that end, said entrance-portion comprises two different groups of peripheral subdivisions of its torque-imparting interior surfaces which are respectively adapted to closely-contact and thereby to engage in torque-imparting-relationship corresponding groups of torque-receiving peripheral subdivisions of exterior surfaces of fastener-heads of said two different types; that said deeper-lying-portion comprises interior surfaces which are adapted to closely-contact and thereby to engage in torqueimparting-relationship exterior surfaces of inserted heads of only the other of sad two types; that some of said group of subdivisions of interior surfaces of said entrance-portion which are adapted to contact exterior surfaces of fastenerheads of said other type are so alligned with predetermined portions of said interior surfaces of said deeper-lyiNg-portion that a fastener-head of said other type upon being inserted into said entrance-portion is guided therethru past said shoulders and into the deeper-lying-portion whereby interior surfaces of both portions (1) and (2) of said recessed interior of the socket will engage that head in torque-impartingrelationship; that the sum of the areas of all torque-imparting surfaces comprised in the group of peripheral subdivisions of the entrance-portion which are adapted to engage a head of said other type comprises a substantially smaller percentage of the sum of all torque-imparting surfaces comprised in said entrance-portion than the percentage thereof comprised in the sum of the areas of all of said surfaces of said other group of peripheral subdivisions of the entrance-portion; and that the ratio of (d plus d'') to d is large enough, in proportion to the relative smallness of said substantially smaller percentage for said deeper-lying-portion to contribute enough additional torque-imparting contact to an inserted head of said other type to enable the socket to impart substantially equal amounts of torque to fastener-heads of said two types.
Claim 3
Dependent Claim
38 words
A wrench-tool according to claim 1 including a lever-arm and a cross-arm attached thereto, each of said arms having at least one free-end, wherein a wrench-socket is affixed to at least one free-end of one of said arms.