US3710874A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic torque measurement system
Assignee: Ingersoll Rand Co
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Filing: 1971-03-10
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Granted: 1973-01-16
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Expires: 1991-03-10
Abstract
Abstract A wrenching and torque inspection apparatus including a rotary power wrench having its housing fixed to a support by a resilient member forming part of an electronic torque measuring system for measuring the reaction torque load on the wrench housing. The torque measurement signal is used to operate an indicator, such as a light, recorder and may be used to stop the wrench at a predetermined value of torque.
Inventors
- 👤 E Treible
- 👤 R Seccombe
- 👤 P Pyper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:58
CPC Classifications
B; B25; B25B; B25B23/00; B25B23/14; B25B23/147
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
84 words
A power wrenching and torque inspection apparatus comprising: a power rotary wrench including a housing and a rotary spindle adapted to drive a fastener; a support for supporting said housing; a resilient annular member interconnected between said support and said housing, surrounding said spindle, and operative to restrain said housing from moving relative to said support under reaction torque on the housing; and means mounted on said annular member for measuring the reaction torque existing on said housing during the operation of said wrench.
Claim 2
Dependent Claim
84 words
A power wrenching and torque inspection apparatus comprising: a power rotary wrench including a housing and a rotary spindle adapted to drive a fastener; a support for supporting said housing; a resilient annular member interconnected between said support and said housing, surrounding said spindle, and operative to restrain said housing from moving relative to said support under reaction torque on the housing; and means mounted on said annular member for measuring the reaction torque existing on said housing during the operation of said wrench.
Claim 3
Dependent Claim
28 words
The apparatus of claim 1 wherein: said measuring means includes electronic means for measuring the strain in said resilient member caused by a torque load on said housing.
Claim 4
Dependent Claim
45 words
The apparatus of claim 2 wherein: said electronic means includes an electrical strain gauge reacting to a change in strain in said resilient member and a circuit containing said strain gauge for creating an electrical signal in response to the reaction in said strain gauge.
Claim 5
Dependent Claim
28 words
The apparatus of claim 3 including: shut-off means operative to stop said wrench in response to the rise in torque on said housing to a predetermined torque loAd.
Claim 6
Dependent Claim
21 words
The apparatus of claim 2 wherein: said resilient member is connected to the forward end of said housing adjacent said spindle.
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) | 1976-01-16 | 1976-07-17 | 1977-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-16 | 1980-07-17 | 1981-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-16 | 1984-07-17 | 1985-01-16 | $7700.00 | Window Closed / Lapsed |