US3726134A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dial torque wrench
Assignee: Individual
•
Filing: 1971-02-22
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Granted: 1973-04-10
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Expires: 1991-02-22
Abstract
Abstract A dial torque wrench including an elongate manually engagable lever arm coextensive with the wrench, an elongate deflection beam of limited longitudinal extent in parallel relationship with and between the ends of the arm means fixing one end of the beam to the arm, a work-engaging head at the other end of the beam, an elongate operating rod in spaced parallel relationship with the beam with an end fixed to the head, a dial means carried by the arm and operatively related to the other end of the rod. The longitudinal extend of the beam being a fraction of the effective length of wrench and is shrouded and protected by the lever arm throughout its longitudinal extent.
Inventors
- 👤 B Grabovac
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:43
CPC Classifications
B; B25; B25B; B25B23/00; B25B23/14; B25B23/142; B25B23/1422; B25B23/1427
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
243 words
A torque wrench comprising an elongate manually engagable rigid lever arm with front and rear ends and co-extensive with the longitudinal extent of the wrench, said lever arm having a chamber extending longitudinally therethrough and a lateral opening adjacent its front end communicating with the chamber, an elongate resilient deflection beam with front and rear ends within and extending longitudinally freely through the chamber, mounting means securing the rear end of the beam in fixed position in the chamber and relative to the arm at a point spaced rearward of said opening, an elongate head with an inner end portion within the chamber and a work-engaging outer portion projecting laterally and freely through the opening and from the arm, means securing the inner portion of the head in fixed relationship to the front end of the beam, an elongate rigid operating rod with front and rear ends, said rod being greater in longitudinal extent than the beam and positioned in the chamber to extend longitudinally freely therethrough in spaced relationship with the beam, means securing the front end of the rod in fixed relationship with the inner portion of the head, the rear end of the rod terminating in the chamber at a point spaced rearward of the rear end of the beam, visibly readable dial means carried by the arm adjacent the rear end of the rod and having a part within the chamber engaged with the rear end of the rod.
Claim 2
Dependent Claim
243 words
A torque wrench comprising an elongate manually engagable rigid lever arm with front and rear ends and co-extensive with the longitudinal extent of the wrench, said lever arm having a chamber extending longitudinally therethrough and a lateral opening adjacent its front end communicating with the chamber, an elongate resilient deflection beam with front and rear ends within and extending longitudinally freely through the chamber, mounting means securing the rear end of the beam in fixed position in the chamber and relative to the arm at a point spaced rearward of said opening, an elongate head with an inner end portion within the chamber and a work-engaging outer portion projecting laterally and freely through the opening and from the arm, means securing the inner portion of the head in fixed relationship to the front end of the beam, an elongate rigid operating rod with front and rear ends, said rod being greater in longitudinal extent than the beam and positioned in the chamber to extend longitudinally freely therethrough in spaced relationship with the beam, means securing the front end of the rod in fixed relationship with the inner portion of the head, the rear end of the rod terminating in the chamber at a point spaced rearward of the rear end of the beam, visibly readable dial means carried by the arm adjacent the rear end of the rod and having a part within the chamber engaged with the rear end of the rod.
Claim 3
Dependent Claim
52 words
A structure as set forth in claim 1 wherein said mounting means includes a mounting block welded to the rear end of the beam and projecting laterally relative to the central longitudinal axis of the beam and welded to an adjacent surface of the chamber and in fixed relationship with the arm.
Claim 4
Dependent Claim
40 words
A structure as set forth in claim 1 wherein the dial means is positioned and is visibly readable at the side of the arm opposite from that side of the arm from which the outer portion of the head projects.
Claim 5
Dependent Claim
103 words
A structure as set forth in claim 1 wherein the dial means is positioned and is visibly readable at the side of the arm opposite from that side of the arm from which the outer portion of the head projects, said mounting means includes a mounting block fixed to the rear end of the beam and projecting laterally relative to the central longitudinal axis of the beam, said head, beam and block establishing an integral assembly and heat treated portions of the block spaced from the beam being welded to an adjacent surface of the chamber and in fixed relationship with the arm.
Claim 6
Dependent Claim
116 words
A structure as set forth in claim 1 wherein said dial means includes a calibrated dial face carried by the arm at the exterior thereof, a shaft with an outer end adjacent the dial face and an inner end within the chamber, a pointer on the outer end of the shaft directed to the calibrations on the dial face and drive means between the inner end of the shaft and the rear end of the rod to rotate the shaft in response to lateral shifting of the head and deflection of the front end of the beam relative to the longitudinal axis of the arm and relative lateral shifting of the rear end of the rod.
Claim 7
Dependent Claim
170 words
A structure as set forth in claim 1 wherein said mounting means includes a mounting block welded to the rear end of the beam and heat treated therewith and projecting laterally relative to the central longitudinal axis of the beam and welded to an adjacent surface of the chamber and in fixed relationship with the arm and at locations spaced from the beam, said dial means includes a calibrated dial face carried by the arm at the exterior thereof, a shaft with an outer end adjacent the dial face and an inner end within the chamber, a pointer on the outer end of the shaft directed to the calibrations on the dial face and drive means between the inner end of the shaft and the rear end of the rod to rotate the shaft in response to lateral shifting of the head and deflection of the front end of the beam relative to the longitudinal axis of the arm and relative lateral shifting of the rear end of the rod.
Claim 8
Dependent Claim
147 words
A structure as set forth in claim 1 wherein the dial means is positioned and is visibly readable at the side of the arm opposite from that side of the arm from which the outer portion of the head projects, said dial means includes a calibrated dial face carried by the arm at the exterior thereof, a shaft with an outer end adjacent the dial face and an inner end within the chamber, a pointer on the outer end of the shaft directed to the calibrations on the dial face and drive means between the inner end of the shaft and the rear end of the rod to rotate the shaft in response to lateral shifting of the head and deflection of the front end of the beam relative to the longitudinal axis of the arm and relative lateral shifting of the rear end of the rod.
Claim 9
Dependent Claim
204 words
A structure as set forth in claim 1 wherein the dial means is positioned and is visibly readable at the side of the arm opposite from that side of the arm from which the outer portion of the head projects, said mounting means includes a mounting block fixed integrally to the rear end of the beam and projecting laterally relative to the central longitudinal axis of the beam and heat treated with the beam, said block welded to an adjacent surface of the chamber at points spaced from the beam and in fixed relationship with the arm, said dial means includes a calibrated dial face carried by the arm at the exterior thereof, a shaft with an outer end adjacent the dial face and an inner end within the chamber, a pointer on the outer end of the shaft directed to the calibrations on the dial face and drive means between the inner end of the shaft and the rear end of the rod to rotate the shaft in response to lateral shifting of the head and deflection of the front end of the beam relative to the longitudinal axis of the arm and relative lateral shifting of the rear end of tHe rod.
Claim 10
Dependent Claim
171 words
A torque wrench of the character referred to including an elongate, manually engagable, rigid lever arm with front and rear ends, an elongate deflection beam arranged in spaced parallel relationship with the forward portion of the arm and having front and rear ends, mounting means securing the rear end of the beam in fixed position on the arm, an elongate work-engaging head fixed to the front end of the beam and projecting laterally therefrom, an elongate operating rod with front and rear ends arranged in lateral spaced parallel relationship with the beam and arm, means securing the front end of the rod in fixed relationship with the forward end of the beam and dial means spaced rearward of the beam carried by and extending between the arm and the rear end of the rod, said structure further including overload prevention means at the front end of the arm to limit lateral deflection of the beam and including laterally spaced stop surfaces normally spaced from and opposing opposite sides of the head.
Claim 11
Dependent Claim
171 words
A torque wrench of the character referred to including an elongate, manually engagable, rigid lever arm with front and rear ends, an elongate deflection beam arranged in spaced parallel relationship with the forward portion of the arm and having front and rear ends, mounting means securing the rear end of the beam in fixed position on the arm, an elongate work-engaging head fixed to the front end of the beam and projecting laterally therefrom, an elongate operating rod with front and rear ends arranged in lateral spaced parallel relationship with the beam and arm, means securing the front end of the rod in fixed relationship with the forward end of the beam and dial means spaced rearward of the beam carried by and extending between the arm and the rear end of the rod, said structure further including overload prevention means at the front end of the arm to limit lateral deflection of the beam and including laterally spaced stop surfaces normally spaced from and opposing opposite sides of the head.
Claim 12
Dependent Claim
70 words
A structure as set forth in claim 9 wherein said dial means includes a calibrated dial face carried by the arm, a shaft related to the dial face and carrying a pointer directed to the calibrations on the dial face and drive means between the shaft and the rear end of the rod to rotate the shaft in response to the lateral movement of the rear end of the rod.
Claim 13
Dependent Claim
111 words
A structure as set forth in claim 9 wherein said dial means includes a calibrated dial face carried by the arm, a shaft related to the dial face and carrying a pointer directed to the calibrations on the dial face and drive means between the shaft and the rear end of the rod to rotate the shaft in response to the lateral movement of the rear end of the rod, said head having an inner end fixed to the front end of the beam, a free outer end portion adapted to engage a piece of work and means securing the rod to the inner portion of the head adjacent the beam.
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) | 1976-04-09 | 1976-10-09 | 1977-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-09 | 1980-10-09 | 1981-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-09 | 1984-10-09 | 1985-04-10 | $7700.00 | Window Closed / Lapsed |