Patent US3672213A successfully refreshed from Google Patents.
US3672213A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Torque transducers
Assignee: Westland Group PLC
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Filing: 1970-08-12
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Granted: 1972-06-27
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Expires: 1990-08-12
Abstract
Abstract A torque transducer for insertion within a hollow shaft consisting of a tube with expansible ends and having a waisted portion along a predetermined length forming a housing for strain gauges. The expansible ends of the tube comprise expansion bolts to give a non-slip pressure face contact with the inside face of the shaft on which torque measurements are required.
Inventors
- 👤 Kenneth Watson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:49
CPC Classifications
G; G01; G01L; G01L3/00; G01L3/02; G01L3/04; G01L3/10; G01L3/108
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
115 words
A torque transducer for insertion in a hollow shaft, comprising a tube radially expansible at its ends and having a waisted or channelled portion along a predetermined length of the tube forming a housing for one or more strain gauge elements, at least one of the expansible ends of the tube being fitted with an expansion bolt contained within a housing adapted to be located within the bore of the shaft, the bolt being operably associated at the plain shank end adjacent to the bolt head with angled washers, the peripheries of which contact the inside surface of the expansible end of the tube, the housing incorporating electrical connection means for the strain gauge elements.
Claim 2
Dependent Claim
115 words
A torque transducer for insertion in a hollow shaft, comprising a tube radially expansible at its ends and having a waisted or channelled portion along a predetermined length of the tube forming a housing for one or more strain gauge elements, at least one of the expansible ends of the tube being fitted with an expansion bolt contained within a housing adapted to be located within the bore of the shaft, the bolt being operably associated at the plain shank end adjacent to the bolt head with angled washers, the peripheries of which contact the inside surface of the expansible end of the tube, the housing incorporating electrical connection means for the strain gauge elements.
Claim 3
Dependent Claim
32 words
A torque transducer as Claimed in claim 1 wherein at least one of the expansible ends of said tube is axially splined to mate with splines in the bore of the shaft.
Claim 4
Dependent Claim
42 words
A torque transducer as claimed in claim 1 wherein said electrical connection means is of the plug and socket type, at least one of the plug and socket being located in said housing at the axial end thereof remote from said tube.
Claim 5
Dependent Claim
40 words
A torque transducer as claimed in claim 3 wherein the other member of the plug and socket connection is located in a second housing adapted to be located in the bore of the shaft axially adjacent said first mentioned housing.
Claim 6
Dependent Claim
30 words
A torque transducer as claimed in claim 4 wherein said second housing comprises at least part of one of the elements of a rotary transformer having rotor and stator elements.
Claim 7
Dependent Claim
23 words
A torque transducer as claimed in claim 5 wherein said second housing forms at least part of the rotor of a rotary transformer.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-27 | 1975-12-27 | 1976-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-27 | 1979-12-27 | 1980-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-27 | 1983-12-27 | 1984-06-27 | $7700.00 | Window Closed / Lapsed |