US3664474A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Torque transmitting devices
Assignee: Allspeeds Holdings Ltd
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Filing: 1970-02-18
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Granted: 1972-05-23
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Expires: 1990-02-18
Abstract
Abstract A torque transmission device consists of a resilient coupling between two shafts. The resilient coupling comprises an assembly mounted on one shaft and provided with a plurality of cylinders each having a piston and a cam arrangement mounted on the other shaft and controlling the piston as regards movement in their respective cylinders upon angular displacement between the two shafts under load conditions. A fluid-filled passage connects the cylinder heads with an outlet for indication or control purposes. The cylinders may be arranged radially with respect to the shaft axes or parallel thereto. A suitable indicating instrument may be connected to the outlet for torque sensing and the device may also be used for torque limiting by connecting to the outlet, means, for instance a metallic bellows, which, at a predetermined value of fluid pressure, increase the volume occupied by the fluid. In addition, the device may be used as a fluid clutch by the provision of manually-operated means for increasing the volume occupied by the fluid.
Inventors
- 👤 John Berchmans Blake
- 👤 Roger Anderton Ashworth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 03:49
CPC Classifications
G; G01; G01L; G01L3/00; G01L3/02; G01L3/14; G01L3/1485; F; F16; F16D; F16D43/00; F16D43/28; F16D43/286
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
106 words
A torque transmission device comprising a casing, a first and a second shaft mounted in axial alignment in said casing, an assembly attached to said first shaft and provided with a plurality of cylinders for the reception of liquid, a piston in each of said cylinders, a cam arrangement attached to said second shaft arranged to effect simultaneous and similar movement of the pistons in the cylinders on relative rotation between the two shafts, an outlet in said casing, a passage connecting all the cylinder heads with said outlet, and yieldable means attached to said outlet for confining said liquid in an enclosure of variable volume.
Claim 2
Dependent Claim
106 words
A torque transmission device comprising a casing, a first and a second shaft mounted in axial alignment in said casing, an assembly attached to said first shaft and provided with a plurality of cylinders for the reception of liquid, a piston in each of said cylinders, a cam arrangement attached to said second shaft arranged to effect simultaneous and similar movement of the pistons in the cylinders on relative rotation between the two shafts, an outlet in said casing, a passage connecting all the cylinder heads with said outlet, and yieldable means attached to said outlet for confining said liquid in an enclosure of variable volume.
Claim 3
Dependent Claim
27 words
A torque transmission device as claimed in claim 1, and means responsive to enlargement of said enclosure for disconnecting the drive between said first and second shafts.
Claim 4
Dependent Claim
40 words
A torque transmission device as claimed in claim 2, the last-named means comprising a metallic bellows connected to said outlet and spring means acting on said bellows to prevent expansion thereof until a predetermined increase in the fluid pressure occurs.
Claim 5
Dependent Claim
34 words
A torque transmission device as claimed in claim 3, and means for adjusting the pressure exerted on the bellows by said spring means thereby enabling the value of the limiting torque to be varied.
Claim 6
Dependent Claim
20 words
A torque transmission device as claimed in claim 1, said cylinders being equally spaced about the axes of the shafts.
Claim 7
Dependent Claim
32 words
A torque transmission device as claimed in claim 1, wherein a plurality of cylinders is formed in said assembly, the cylinder axes being radial with respect to the axes of the shafts.
Claim 8
Dependent Claim
50 words
A torque transmission device as claimed in claim 6, wherein the cam arrangement consists of a cam track provided in a member secured to said second shaft, the pistons being provided with anti-friction rollers which under no-load conditions engage in the roots of inwardly extending depressions in the cam track.
Claim 9
Dependent Claim
30 words
A torque transmission device as claimed in claim 1, wherein a plurality of cylinders is formed in said assembly, the cylinder axes being parallel to the axes of the shafts.
Claim 10
Dependent Claim
54 words
A torque transmission device as claimed in claim 8, wherein the cam arrangement consists of a face cam provided on a member secured to said second shaft, the pistons being provided with anti-friction rollers which under no-load conditions engage in the roots of depression in the face cam which extend away from the pistons.
Claim 11
Dependent Claim
148 words
A torque transmitting device comprising a first shaft, a second shaft in axial alignment with said first shaft, an assembly attached to said first shaft, a plurality of cylinders in said assembly equally spaced around the axes of said shafts, a piston in each of said cylinders, an outlet, yieldable means connected to said outlet for confining said liquid in an enclosure of variable volume, a liquid-filled passage connecting said cylinders with said outlet thereby to form an internally closed system for the liquid and a cam arrangement attached to said second shaft, the cam arrangement under load conditions effecting simultaneous and similar movement of the pistons in the cylinders and movement of the liquid through said outlet until the pressure exerted by the liquid on the yieldable means balances the torque applied to said second shaft whereupon a direct drive obtains between said first and second shafts.
Claim 12
Dependent Claim
148 words
A torque transmitting device comprising a first shaft, a second shaft in axial alignment with said first shaft, an assembly attached to said first shaft, a plurality of cylinders in said assembly equally spaced around the axes of said shafts, a piston in each of said cylinders, an outlet, yieldable means connected to said outlet for confining said liquid in an enclosure of variable volume, a liquid-filled passage connecting said cylinders with said outlet thereby to form an internally closed system for the liquid and a cam arrangement attached to said second shaft, the cam arrangement under load conditions effecting simultaneous and similar movement of the pistons in the cylinders and movement of the liquid through said outlet until the pressure exerted by the liquid on the yieldable means balances the torque applied to said second shaft whereupon a direct drive obtains between said first and second shafts.
References Cited (Backward Citations)
FR592093A
Cited
GB405429A
Cited
US2244185A
Cited
GB544230A
Cited
US2408501A
Cited
US2597514A
Cited
US2546062A
Cited
US2546403A
Cited
DE956654C
Cited
US3108471A
Cited
US3274896A
Cited
US3419117A
Cited
US3527329A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-23 | 1975-11-22 | 1976-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-23 | 1979-11-22 | 1980-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-23 | 1983-11-22 | 1984-05-23 | $7700.00 | Window Closed / Lapsed |