Patent US3922935A successfully refreshed from Google Patents.
US3922935A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic torquing tool
Assignee: Individual
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Filing: 1975-01-30
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Granted: 1975-12-02
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Expires: 1995-01-30
Abstract
Abstract A thrust and/or twist torque wrench is provided in the form of the combination, with modifications, of a reciprocal motion automatic screwdriver and an angular motion torque-limiting wrench. The modifications include use of the body of an automatic screwdriver as the barrel or drive member of the torque-limiting wrench, and by alteration of the reciprocal shaft of an automatic screwdriver to have a spline therealong in place of a right-hand helical groove. The front end of the reciprocal shaft is adapted to receive a wrench socket or the like. The wrench is operable to turn a threaded fastener or the like to a condition of initial snugness by reciprocal motion of the handle of the wrench, following which angular motion applied to the handle applies torque to the fastener up to a predetermined torque limit defined by the wrench. The reciprocal shaft of the tool may be locked relative to the body and handle assembly for driving a threaded fastener in a reverse direction if desired.
Inventors
- 👤 Walter E Dahlem
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:31
CPC Classifications
B; B25; B25B; B25B15/00; B25B15/06; B25B23/00; B25B23/14; B25B23/142; B25B23/1422; B25B23/1427; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18056; Y10T74/18296; Y10T74/18304; Y10T74/18312
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
171 words
A thrust-type torque wrench comprising an axially hollow body, a shaft disposed in the body for rotation therein about an axis of the shaft and for axial movement relatively into and out of one end of the body, one end of the shaft extending from the one end of the body and defining means adapting the shaft for torque transmitting engagement with the head of a threaded fastener and the like, means cooperating between the body and the shaft for converting axial motion of the body along the shaft toward the one end of the shaft into angular motion of the shaft in one direction about its axis and for preventing angular motion of the body relative to the shaft in the same direction essentially irrespective of the axial position of the shaft in the body, and means associated with the body operable essentially irrespective of the axial position of the shaft in the body for preventing effective application to the shaft of torque in excess of a selected torque value.
Claim 2
Dependent Claim
171 words
A thrust-type torque wrench comprising an axially hollow body, a shaft disposed in the body for rotation therein about an axis of the shaft and for axial movement relatively into and out of one end of the body, one end of the shaft extending from the one end of the body and defining means adapting the shaft for torque transmitting engagement with the head of a threaded fastener and the like, means cooperating between the body and the shaft for converting axial motion of the body along the shaft toward the one end of the shaft into angular motion of the shaft in one direction about its axis and for preventing angular motion of the body relative to the shaft in the same direction essentially irrespective of the axial position of the shaft in the body, and means associated with the body operable essentially irrespective of the axial position of the shaft in the body for preventing effective application to the shaft of torque in excess of a selected torque value.
Claim 3
Dependent Claim
41 words
A tool according to claim 1 wherein the means associated with the body includes a handle coupled to the body and said means is operable for preventing effective application to the body of torque in excess of the selected torque value.
Claim 4
Dependent Claim
25 words
A tool according to claim 2 wherein the handle is coupled to the body for transmission to the body of thrust applied to the handle.
Claim 5
Dependent Claim
14 words
A tool according to claim 2 including means for adjusting the selected torque value.
Claim 6
Dependent Claim
32 words
A tool according to claim 2 wherein the means cooperating between the body and the shaft includes means for accommodating angular movement of the body about the shaft in the opposite direction.
Claim 7
Dependent Claim
30 words
A tool according to claim 5 wherein the means cooperating between the shaft and the body includes a helical groove in the shaft and an axial groove in the shaft.
Claim 8
Dependent Claim
53 words
A tool according to claim 6 wherein the helix of the helical groove is a left-hand helix, and including means engageable in the helical groove and cooperating with the body for converting axial motion of the body toward the one end of the shaft into clockwise rotation of the shaft about its axis.
Claim 9
Dependent Claim
50 words
A tool according to claim 5 including means for locking the shaft in an axially retracted position in the body, and means cooperating between the body and the shaft in said retracted position of the shaft for preventing angular motion of the body about the shaft in the opposite direction.
Claim 10
Dependent Claim
31 words
A tool according to claim 1 wherein the means defined at the one end of the shaft adapts the shaft for receipt and retention of a wrench socket and the like.
Claim 11
Dependent Claim
85 words
A tool according to claim 1 wherein the means associated with the body includes a handle coupled to the body for transmission to the body of thrust applied to the handle, and means cooperating between the handle and the body for fixing the handle angularly relative to the body when torque between the handle and the body is less than the selected torque value and for enabling angular motion between the handle and the body when torque therebetween equals or exceeds the selected torque value.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-01 | 1979-06-02 | 1979-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-01 | 1983-06-02 | 1983-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-01 | 1987-06-02 | 1987-12-02 | $7700.00 | Window Closed / Lapsed |