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US3589179A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Torque gauge for drilling tongs
Assignee: INSTITUTUL DE CERCETARI SI PROIECTARI PENTRU INDUSTRIA EXTRACTIVA DE TITEI SI GAZE
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Filing: 1969-01-13
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Granted: 1971-06-29
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Expires: 1989-01-13
Abstract
Abstract A tong lever of a torque gauge has an opening in which the arms of a U-shaped support member are inserted, the support member supporting one surface of a compression dynamometer transducer while the opposite surface is engaged by a yoke which is coupled to the support member via a bolt. A tension cable passes through the opening in the tong lever and undergoes a bend thereat, the end of the cable being mounted on the bolt. In one embodiment the yoke has arms disposed within the U-shaped support and direct readout of torque is obtained at the transducer irrespective of bend angle whereas in a second embodiment the arms of the yoke are outside the U-shaped support member and the readout of torque is proportional to the bend angle.
Inventors
- 👤 Ioan Nicolau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:42
CPC Classifications
E; E21; E21B; E21B19/00; E21B19/16
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
227 words
A torque gauge comprising an elongated tong lever having a bore therein remote from a gripping end of the tong lever, a compression dynamometer transducer having opposite surfaces, means securing said transducer via said bore of said tong lever and including a U-shaped support member secured to said tong lever at said bore and extending perpendicularly therefrom and engaging said transducer along one surface thereof, a yoke engaging the other surface of the transducer, a second means positioned between said transducer and tong lever and supported by said yoke for receiving the end of a pull line which can be passed through the bore in the tong lever and bent at said tong lever, and third means secured in said bore of the tong lever and engaging the support member to receive the reaction force of the pull line at the bend therein and cause the yoke and support member to compress the transducer in proportion to the tension in the line as corrected for the angle of the pull line at said bend whereby the transducer indicates a value proportional to the torque produced by the pull line about the gripping end of the tong lever, said second means comprising a bolt engaged with the yoke and said third means comprising a further bolt extending axially in said tong lever and engaged with the support member.
Claim 2
Dependent Claim
227 words
A torque gauge comprising an elongated tong lever having a bore therein remote from a gripping end of the tong lever, a compression dynamometer transducer having opposite surfaces, means securing said transducer via said bore of said tong lever and including a U-shaped support member secured to said tong lever at said bore and extending perpendicularly therefrom and engaging said transducer along one surface thereof, a yoke engaging the other surface of the transducer, a second means positioned between said transducer and tong lever and supported by said yoke for receiving the end of a pull line which can be passed through the bore in the tong lever and bent at said tong lever, and third means secured in said bore of the tong lever and engaging the support member to receive the reaction force of the pull line at the bend therein and cause the yoke and support member to compress the transducer in proportion to the tension in the line as corrected for the angle of the pull line at said bend whereby the transducer indicates a value proportional to the torque produced by the pull line about the gripping end of the tong lever, said second means comprising a bolt engaged with the yoke and said third means comprising a further bolt extending axially in said tong lever and engaged with the support member.
Claim 3
Dependent Claim
26 words
A gauge as claimed in claim 1 wherein said yoke includes arms extending within the U-shaped support member and said line is guided between said arms.
Claim 4
Dependent Claim
51 words
A gauge as claimed in claim 2 wherein said further bolt is secured in said tong lever along the axis thereof, said line being bent by passing on said further bolt, said support member including arms extending into the opening formed in said tong lever and engaged with said further bolt.
Claim 5
Dependent Claim
34 words
A gauge as claimed in claim 3 comprising bearings receiving the first said bolt and engaged with said first yoke and support member to transmit force therebetween in a direction normal to said bolt.
Claim 6
Dependent Claim
31 words
A gauge as claimed in claim 1 wherein said yoke includes arms extending outside the U-shaped support member and said line is guided by the U-shaped member between the legs thereof.
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) | 1974-06-28 | 1974-12-28 | 1975-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-28 | 1978-12-28 | 1979-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-28 | 1982-12-28 | 1983-06-29 | $7700.00 | Window Closed / Lapsed |