Patent US3577815A successfully refreshed from Google Patents.
US3577815A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two-way torque wrench
Assignee: Stanley Works
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Filing: 1969-04-02
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Granted: 1971-05-04
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Expires: 1989-04-02
Abstract
Abstract A predetermined torque release wrench which may be used to apply a torque to a fastener in either rotary direction. The wrench includes an arm connected to the ratchet head of the wrench and a spring pressed cam and follower arrangement. The arm overcomes the resistance of the cam and follower arrangement when a predetermined torque is reached. An arrangement is provided for varying the profile of the cam to permit calibration of the wrench.
Inventors
- 👤 Clifford A Bergquist
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:42
CPC Classifications
B; B25; B25B; B25B23/00; B25B23/14; B25B23/142; B25B23/1422; B25B23/1427
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
208 words
A torque wrench comprising: a hollow handle; a work engaging member rotatably mounted on said handle; an arm operatively connected at one end to said work engaging member and longitudinally extending into said handle and adapted to rotate relative to said handle; a plunger longitudinally movable in said handle and positioned opposite the other end of said arm; one of said arm and plunger having a roller mounted thereon adjacent the other of said arm and plunger; the other of said arm and plunger being bifurcated at its end near said one of said arm and plunger; the legs of the bifurcated end defining a recess in which said roller is normally seated; means for urging said plunger toward said arm for releasably restraining said arm away from rotating in either of two directions whereby an applied torque which tends to rotate said arm relative to said handle creates a longitudinal camming force on said plunger tending to move said plunger away from said arm to thereby release said arm for rotation relative to said handle; and means for adjusting the spacing between the legs of the bifurcated end to thereby adjust the amount of applied torque necessary to release said arm for rotation relative to said handle.
Claim 2
Dependent Claim
208 words
A torque wrench comprising: a hollow handle; a work engaging member rotatably mounted on said handle; an arm operatively connected at one end to said work engaging member and longitudinally extending into said handle and adapted to rotate relative to said handle; a plunger longitudinally movable in said handle and positioned opposite the other end of said arm; one of said arm and plunger having a roller mounted thereon adjacent the other of said arm and plunger; the other of said arm and plunger being bifurcated at its end near said one of said arm and plunger; the legs of the bifurcated end defining a recess in which said roller is normally seated; means for urging said plunger toward said arm for releasably restraining said arm away from rotating in either of two directions whereby an applied torque which tends to rotate said arm relative to said handle creates a longitudinal camming force on said plunger tending to move said plunger away from said arm to thereby release said arm for rotation relative to said handle; and means for adjusting the spacing between the legs of the bifurcated end to thereby adjust the amount of applied torque necessary to release said arm for rotation relative to said handle.
Claim 3
Dependent Claim
23 words
The torque wrench oF claim 1 wherein said roller is mounted on said plunger and said other end of said arm is bifurcated.
Claim 4
Dependent Claim
27 words
The torque wrench of claim 1 wherein a hardened pin is carried by each of the legs of the bifurcated end and said pins engage said roller.
Claim 5
Dependent Claim
23 words
The torque wrench of claim 3 wherein said roller is mounted on said plunger and said other end of said arm is bifurcated.
Claim 6
Dependent Claim
28 words
The torque wrench of claim 4 wherein said handle defines means for permitting access to said means for adjusting the spacing between the legs of the bifurcated end.
Claim 7
Dependent Claim
50 words
The torque wrench of claim 5 wherein said urging means is a spring acting between said plunger and said handle and further comprising means for adjusting the urging force of said spring to thereby adjust the amount of torque necessary to release said arm for rotation relative to said handle.
Claim 8
Dependent Claim
159 words
In a torque wrench having a hollow handle, a work engaging member rotatably mounted on said handle, an arm having one end operatively connected to said work engaging member and extending into said handle and adapted to rotate with said work engaging member, and means providing predetermined resistance to rotative movement of said arm comprising: cam means mounted on the other end of the arm; follower means positioned in the handle adjacent said other end of said arm and in contact with said cam means; means for urging said follower means toward said cam means and resisting rotative movement of said arm; said follower means being movable by said cam means in a direction away from said arm in response to a rotative movement of said arm; and means for adjusting the profile of said cam means while maintaining continuous contact between said cam means and follower means to thereby adjust the resistance to rotative movement of said arm.
Claim 9
Dependent Claim
159 words
In a torque wrench having a hollow handle, a work engaging member rotatably mounted on said handle, an arm having one end operatively connected to said work engaging member and extending into said handle and adapted to rotate with said work engaging member, and means providing predetermined resistance to rotative movement of said arm comprising: cam means mounted on the other end of the arm; follower means positioned in the handle adjacent said other end of said arm and in contact with said cam means; means for urging said follower means toward said cam means and resisting rotative movement of said arm; said follower means being movable by said cam means in a direction away from said arm in response to a rotative movement of said arm; and means for adjusting the profile of said cam means while maintaining continuous contact between said cam means and follower means to thereby adjust the resistance to rotative movement of said arm.
Claim 10
Dependent Claim
29 words
In the torque wrench of claim 7, said means for urging said follower means toward said cam means is a spring acting between the handle and said follower means.
Claim 11
Dependent Claim
26 words
In the torque wrench of claim 8, said follower means includes a plunger slidably mounted in said handle and a roller rotatably mounted on said plunger.
Claim 12
Dependent Claim
44 words
In the torque wrench of claim 9, the other end of said arm is bifurcated and pin means is mounted on each leg of the bifurcated portion of said arm to define said cam means; said pin means being in contact with said roller.
Claim 13
Dependent Claim
33 words
In the torque wrench of claim 10, said means for adjusting the profile of said cam means includes means for adjusting the spacing between the legs of the bifurcated end of the arm.
References Cited (Backward Citations)
US2962918A
Cited
US3140623A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-03 | 1974-11-02 | 1975-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-03 | 1978-11-02 | 1979-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-03 | 1982-11-02 | 1983-05-04 | $7700.00 | Window Closed / Lapsed |