US3934428A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexible coupling
Assignee: ITT Inc
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Filing: 1974-05-10
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Granted: 1976-01-27
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Expires: 1994-05-10
Abstract
Abstract A flexible coupling is provided for use between the shaft of a screw pump rotor and that of a driving motor where the shafts are required to transfer considerable axial forces and are subject to rotating out of axial alignment with each other. The respective shaft ends are formed either as cones or sections of spheres and are held together by a screwspring which envelopes both ends and transfers much of the torque from one shaft to the other while reducing the possibility for lateral displacement of the shafts. The shaft ends are positioned to roll against each other to reduce wear when the shafts rotate.
Inventors
- 👤 Sven Arvid Hedin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 16:44
CPC Classifications
F; F16; F16D; F16D3/00; F16D3/50; F16D3/72; Y; Y10; Y10T; Y10T403/00; Y10T403/45; Y10T403/459
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
162 words
A coupling for two rotating torque transferring shafts which are subject to variations in the angles they rotate with respect to each other and are exposed to strong axial pressures comprising, prepared heading surfaces on the ends of two shafts formed as conical or spherical surfaces so that, when the shafts are parallel and the ends of the shafts are placed in contact with each other they make contact with each other at a single central point, and when the shafts form an angle of less than 180° with respect to each other during a period of rotation, the two end surfaces roll against each other, and means for preventing the two ends of the shafts from moving radially relative to each other, said means serving also as a torque transfer device transferring a portion of the turning torque between the two shafts, where the torque transferring device is a screw spring which is arranged around the ends of the two shafts.
Claim 2
Dependent Claim
162 words
A coupling for two rotating torque transferring shafts which are subject to variations in the angles they rotate with respect to each other and are exposed to strong axial pressures comprising, prepared heading surfaces on the ends of two shafts formed as conical or spherical surfaces so that, when the shafts are parallel and the ends of the shafts are placed in contact with each other they make contact with each other at a single central point, and when the shafts form an angle of less than 180° with respect to each other during a period of rotation, the two end surfaces roll against each other, and means for preventing the two ends of the shafts from moving radially relative to each other, said means serving also as a torque transfer device transferring a portion of the turning torque between the two shafts, where the torque transferring device is a screw spring which is arranged around the ends of the two shafts.
Claim 3
Dependent Claim
26 words
The invention according to claim 1, in which the torque transferring device is a screw spring which is arranged around the ends of the two shafts.
Claim 4
Dependent Claim
31 words
The invention according to claim 1, in which, when the heading surfaces are sections of spheres, rolling between the two surfaces occurs along circles formed along point contacts between the surfaces.
Claim 5
Dependent Claim
30 words
The invention according to claim 1, in which when the heading surfaces are conical surfaces, the rolling normally occurs along line contacts between the mantle surfaces of the conical surfaces.
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) | 1979-01-26 | 1979-07-28 | 1980-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-26 | 1983-07-28 | 1984-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-26 | 1987-07-28 | 1988-01-27 | $7700.00 | Window Closed / Lapsed |