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US 4,060,137 AGranted
Torque wrench
AssigneeRaymond Engineering Inc.
InventorsJohn H. Bickford, Donald H. Ranheim, Jr., Willard A. Saxby
Life of this patent
Estimating the term…
Abstract
A torque wrench is presented having bidirectional operating capability, accurate readout, and preset or load selection capability. The input drives a pair of ring gears, one of which is connected to the output of the wrench and the other of which is part of a reaction arm system which interacts with the readout and preset features.
Claims29
A torque wrench including:
- a casing;
- input drive means in said casing receiving an operating input;
- first planetary gear means in said casing drivingly connected to said input drive means;
- rotatable output means connected to and driven by said first planetary gear means, said output means being adapted to engage an element to be torqued;
- second planetary gear means in said casing drivingly connected to said input drive means;
- said first and second planetary gear means having different gear ratios and common sun gear means;
- reaction means coupled to said second planetary gear means;
- load resisting means in said casing coooperating with said reaction means, said reaction means being movable within a limited range of movement against said load resisting means;
- and
- indicating means operatively connected to said reaction means to indicate the torque output of the wrench as a function of the movement of said reaction means.
7 more elements
A torque wrench including:
- a casing;
- input drive means in said casing receiving an operating input;
- first planetary gear means in said casing drivingly connected to said input drive means;
- rotatable output means connected to and driven by said first planetary gear means, said output means being adapted to engage an element to be torqued;
- second planetary gear means in said casing drivingly connected to said input drive means, said second planetary gear means including a ring gear;
- reaction arm means integral with said ring gear of said second planetary gear means, said reaction arm means having an opening therein, and said reaction arm means being movable in opposite directions depending on the direction of rotation of said output means;
- spring means in said casing positioned in said reaction arm means opening, said reaction arm means being movable within a limited range of movement against said spring means and compressing said spring means between said casing and said reaction arm means in response to torque imposed by the wrench on an element being torqued;
- and
- indicating means operatively connected to said reaction arm means to indicate the torque output of the wrench as a function of the movement of said reaction arm means.
6 more elements
Dependencies are inferred from the claim text.