US 6,279,428 B1Granted

Ratchet wrench

OwnerChin-Tan Huanginventor

Life of this patent

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Abstract

A ratchet wrench including a main body, a ratchet, a switching unit and two stopper members. The stopper members are slidable within the recesses of the main body to abut against the ratchet so that the ratchet can be only one-way rotated. The ratchet wrench is applicable to the ratchet with teeth projecting from outer side thereof. The stopper members are supported by the main body and the guide block and firmly located. Therefore, the ratchet wrench is able to bear greater working torque and achieve better using effect.

Claims7

Dependent claims

A ratchet wrench comprising:

(a) a main body including a front end section and a grip section extending therefrom, said front end section having an inner wall portion defining a receiving chamber, said main body having formed therethrough a first fitting hole;
(b) a cover body coupled to said main body front end section to at least partially enclose said receiving chamber, said cover body having formed therethrough a second fitting hole;
(c) a ratchet rotatably disposed within said receiving chamber of said main body front end section, said ratchet having formed thereon a plurality of radially extending teeth, said ratchet having an axially extended fitting section for engaging said first and second fitting holes;
(d) a pair of stopper members each slidably disposed against said inner wall portion of said main body front end section, each said stopper member being selectively displaceable between first and second positions, each said stopper member including a stopper end section and a transversely extended engaging section, said stopper end section lockingly engaging at least one said ratchet tooth in said first position and being disengaged from said ratchet teeth in said second position;
(e) a switching unit coupled to said stopper members for controlling said displacement thereof, said switching unit including an adjustable engaging block, said engaging block having a pair of hook sections extending therefrom for respectively engaging said engaging sections of said stopper members, said hook sections being displaceable to selectively drive said stopper members to at least one of said first and second positions thereof;
and,
(f) a guide block disposed in said receiving chamber of said main body front end section between said stopper members, said guide block having a pair of recesses formed on opposing sides thereof for slidably receiving said stopper members respectively therein, whereby the rotation of said ratchet is selectively limited.

4 more elements

Dependencies are inferred from the claim text.

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Abstract

A ratchet wrench comprising:

(a) a main body including a front end section and a grip section extending therefrom, said front end section having an inner wall portion defining a receiving chamber, said main body having formed therethrough a first fitting hole;
(b) a cover body coupled to said main body front end section to at least partially enclose said receiving chamber, said cover body having formed therethrough a second fitting hole;
(c) a ratchet rotatably disposed within said receiving chamber of said main body front end section, said ratchet having formed thereon a plurality of radially extending teeth, said ratchet having an axially extended fitting section for engaging said first and second fitting holes;
(d) a pair of stopper members each slidably disposed against said inner wall portion of said main body front end section, each said stopper member being selectively displaceable between first and second positions, each said stopper member including a stopper end section and a transversely extended engaging section, said stopper end section lockingly engaging at least one said ratchet tooth in said first position and being disengaged from said ratchet teeth in said second position;
(e) a switching unit coupled to said stopper members for controlling said displacement thereof, said switching unit including an adjustable engaging block, said engaging block having a pair of hook sections extending therefrom for respectively engaging said engaging sections of said stopper members, said hook sections being displaceable to selectively drive said stopper members to at least one of said first and second positions thereof;
and,
(f) a guide block disposed in said receiving chamber of said main body front end section between said stopper members, said guide block having a pair of recesses formed on opposing sides thereof for slidably receiving said stopper members respectively therein, whereby the rotation of said ratchet is selectively limited.

4 more elements