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US 4,231,454 AGranted
Torque wrench with clutches in series
AssigneeRaymond Engineering Inc.
InventorsJohn H. Bickford, Robert F. Snyder
Life of this patent
Estimating the term…
Abstract
A torque wrench is presented having a pair of clutches in series. One clutch is a one way clutch, preferably reversible, which transmits the input force in one direction during torquing operations; and the second clutch provides friction restraint against movement in the opposite direction. When desired, force applied to the wrench in the opposite direction overcomes the friction clutches to release the wrench from the work.
Claims13
A torque wrench including:
- a casing;
- torque transmission means in said casing;
- input means connected to said transmission means for delivering an input force to said transmission means in response to movement of said input means in a first direction;
- output means connected to said transmission means for imposing a torque load on an element to be torqued;
- one way clutch means coupled to said input means to prevent reaction forces in said wrench from acting on said input means to cause undesired movement of said input means in a direction opposite to said first direction;
- and
- slip brake means connected to said one way clutch means and in series with said one way clutch means, said slip brake means being responsive to a predetermined load on said input means in a direction opposite to said first direction to relax the reaction forces in said wrench.
4 more elements
A torque wrench including:
- a casing;
- gear train means in said casing for transmission of torque;
- rotatable input means connected to said gear train means for delivering an input force to said gear train means in response to rotation of said input means in a first direction;
- rotatable output means connected to said gear train means for delivering an output torque in a first direction to an element to be torqued;
- one way clutch means coupled to said input means to prevent reaction forces in said wrench from adting on said input means to rotate said input means in a direction opposite to said first direction thereof;
- and
- slip brake means coupled to said one way clutch means and in series with said one way clutch means, said slip brake means having a first slip element connected to said casing and a second slip element coupled to said one way clutch means, said second slip element loaded against said first slip element and being rotatable relative to said first slip element in response to a predetermined force on said input means in a direction opposite to said first direction thereof to relax the reaction forces in said wrench.
4 more elements
A torque wrench including:
- a casing;
- gear train means in said casing for transmission of torque;
- rotatable input means connected to said gear train means for delivering an input force to said gear train means in responsive to rotation of said input means in a first direction;
- rotatable output means connected to said gear train means for delivering an output torque in a first direction to an element to be torqued;
- one way clutch means coupled to said input means to prevent reaction forces in said wrench from acting on said input means to rotate said input means in a direction opposite to said first direction;
- and
- slip brake means coupled to said one way clutch means and in series with said one way clutch means, said slip brake means having a first slip element connected to said casing and a second slip element coupled to said one way clutch means, said second slip element comprising a split ring, said split ring being loaded against said first slip element and being rotatable relative to said first slip element in response to a predetermined force on said input means in a direction opposite to said first direction to relax the reaction forces in said wrench.
4 more elements
A torque wrench including:
- a casing;
- torque transmission means in said casing;
- input means connected to said transmission means for delivering an input force to said transmission means in response to movement of said input means in a first direction;
- output means connected to said transmission means for imposing a torque load on an element to be torqued;
- reversible one way clutch means coupled to said input means to prevent reaction forces in said wrench from acting on said input means to cause undesired movement of said input means in a direction opposite to said first direction;
- and
- slip brake means connected to said one way clutch means and in series with said one way clutch means, said slip brake means being responsive to a predetermined load on said input means in a direction opposite to said first direction to relax the reaction forces in said wrench.
4 more elements
A torque wrench including:
- a casing;
- gear train means in said casing for transmission of torque;
- rotatable input means connected to said gear train means for delivering an input force to said gear train means in response to rotation of said input means in a first direction;
- rotatable output means connected to said gear train means for delivering an output torque in a first direction to an element to be torqued;
- reversible one way clutch means coupled to said input means to prevent reaction forces in said wrench from acting on said input means to rotate said input means in a direction opposite to said first direction;
- and
- slip brake means coupled to said one way clutch means and in series with said one way clutch means, said slip brake means having a first slip element connected to said casing and a second slip element loaded against said first slip element and being rotatable relative to said first slip element in response to a predetermined force on said input means in a direction opposite to said first direction to relax the reaction forces in said wrench.
4 more elements
Dependencies are inferred from the claim text.