US 4,791,837 AGranted

Speed wrench and hand grip combination

OwnerHarvey M. Maininventor

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Abstract

A speed wrench and complimentary hand grip is provided. The wrench includes a casing which mounts a standard drive mechanism which has a drive member axially projecting from the casing in order to engage a work piece. The wrench has an added feature in the form of a drive head rigidly attached to the casing axially thereof on a side opposite the drive member. The drive head has parallel exterior sides and an interior axial cavity. Thus, the wrench may be torqued by both a normal auxillary wrench having a wrench head that engages the exterior sides by a normal lug wrench which has a drive lug that may mateably engage the cavity. The complimentary handle is in the form of a shell that nestably receives the wrench. The handle has an axial opening sized to receive the drive head whereby rotation of the handle rotates the wrench. The opening also allows access to the drive head cavity while the handle and wrench are nested.

Claims16

Dependent claims

In a tool adapted to rotatably drive a work piece wherein said tool includes a casing which mounts a drive mechanism having a drive member that projects axially from one side of the casing and that is adapted to selectively engage the work piece whereby rotation of said casing rotates said work piece, the improvement comprising a drive head rigidly attached to said tool and projecting axially from said casing on a second side thereof opposite said drive member, said drive head having a raised surface generally in a plane transverse to the common axis of said drive member and said drive head and having a plurality of flat exterior sides oriented along exterior planes which are parallel to said common axis, at least some of said exterior sides being parallel to one another, said drive head having an axial cavity formed in said raised surface, said cavity having a plurality of flat interior sidewalls oriented along interior planes which are parallel to said common axis, a bail member, extending across said casing on the second side thereof with said bail member having radial edges attached to an outer edge area of said casing, said casing, said bail member and said drive head being formed of an integral one-piece construction, and a hand grip sized to receive said tool in nested relation, said hand grip comprising a shell having an outer surrounding sidewall which engages said casing in a nested state and a cap portion rigidly attached to said surrounding sidewall, said cap portion having an axial opening configured and oriented to mateably receive said drive head in the nested state whereby said hand grip may be rotate said work piece.

A speed wrench adapted to be both manually rotated about a central axis and selectively engaged by a wrenching tool having a working element in order to rotatably drive a tool that correspondingly drives a work piece, comprising:

a cylindrical casing having an exterior surface;
a reversible ratchet mechanism switchable between a first and second drive states corresponding to opposite rotational drive directions said drive mechanism being mounted in said casing and including a drive shaft projecting axially of said casing on a first side thereof adapted to couple a tool element whereby manual rotation of said casing will rotatably drive said drive shaft in a selected one of said drive directions;
a mechanical switch member connected to said ratchet mechanism between said first and second rotational drive states;
a bail member formed in a strap-like configuration extending across a second side of said casing opposite said drive shaft, said bail member having end portions rigidly attached to said casing to form access openings formed between said casing and said bail member thereby allowing access to said switch member and wherein outer exposed faces of said end portions form smooth, uninterrupted continuations of said exterior surface;
a drive head attached to said bail member along a common axis with said drive shaft, said drive head configured to be engaged by the working element of said wrenching tool whereby said casing may be rotated with increased mechanical advantages by said wrenching tool;
and
a hand grip sized to receive said tool in nested relation, said hand grip comprising a shell having an outer surrounding sidewall which engages said casing in a nested state and a cap portion rigidly attachd to said surrounding sidewall, said cap portion having an axial opening configured and oriented to mateably receive said drive head in the nested state whereby said hand grip may be rotated about said common axis to correspondingly rotate said work piece.

4 more elements

Dependencies are inferred from the claim text.