US3907084A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid coupling
Assignee: Cummins Turbo Technologies Ltd
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Filing: 1974-02-11
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Granted: 1975-09-23
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Expires: 1994-02-11
Abstract
Abstract The present invention provides a fluid coupling containing a working fluid and comprising a rotatable driving member, at least part of which is mounted for co-axial rotation within a working chamber forming part of a rotatable driven member. Shear spaces are defined by opposing faces of said driving member and working chamber and a reservoir forms part of the driven member. One or more inlet ports are provided adjacent the periphery of the driven member and connecting the working chamber with the reservoir and one or more outlet ports are located radially inwardly of the inlet port or ports. A fluid transfer duct means extends axially between the outlet port or ports and one or more flow accelerating passages within that part of the driving member located within the working chamber. Each fluid flow accelerating passage is open at each end and extends from a location immediately radially outwardly of the outlet port or ports to the periphery of the driving member. The periphery of the driving member is located at a greater radial distance from the co-axial centres of the driving and driven members than the inlet port, and a valve member is movable to open or close the outlet port or ports and control the flow of fluid from the reservoir to the shear spaces via the said transfer duct and fluid flow accelerating passages.
Inventors
- 👤 Jeffrey Hall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:11
CPC Classifications
F; F16; F16D; F16D33/00; F16D33/06; F16D33/08; F16D33/10
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
243 words
A fluid coupling containing a working fluid and comprising: a rotatable driving member; a rotatable driven member; a working chamber forming part of said rotatable driven member; means mounting at least part of said rotatable driving member for coaxial rotation within said working chamber; said driving member and working chamber having opposing faces defining shear spaces; a fluid reservoir forming part of said driven member; inlet port means adjacent the periphery of said driven member and connecting said working chamber to said reservoir; outlet port means located radially inwardly of said inlet port means and connecting said reservoir to said working chamber; flow accelerating passage means within said part of said driving member located within said working chamber, fluid transfer duct means extending axially between said outlet port means and said flow accelerating passage means; said fluid flow accelerating passage means being open at each end and extending from a location immediately radially outwardly of said fluid transfer duct means to the periphery of that part of said driving member disposed within said working chamber; the periphery of said part of said driving member being at a greater radial distance from the co-axial centers of the driving and driven members than said inlet port means; and valve means operable to selectively open and close said outlet port means and control the return flow of fluid from said reservoir to said shear spaces via said transfer duct means and fluid flow accelerating passage means.
Claim 2
Dependent Claim
243 words
A fluid coupling containing a working fluid and comprising: a rotatable driving member; a rotatable driven member; a working chamber forming part of said rotatable driven member; means mounting at least part of said rotatable driving member for coaxial rotation within said working chamber; said driving member and working chamber having opposing faces defining shear spaces; a fluid reservoir forming part of said driven member; inlet port means adjacent the periphery of said driven member and connecting said working chamber to said reservoir; outlet port means located radially inwardly of said inlet port means and connecting said reservoir to said working chamber; flow accelerating passage means within said part of said driving member located within said working chamber, fluid transfer duct means extending axially between said outlet port means and said flow accelerating passage means; said fluid flow accelerating passage means being open at each end and extending from a location immediately radially outwardly of said fluid transfer duct means to the periphery of that part of said driving member disposed within said working chamber; the periphery of said part of said driving member being at a greater radial distance from the co-axial centers of the driving and driven members than said inlet port means; and valve means operable to selectively open and close said outlet port means and control the return flow of fluid from said reservoir to said shear spaces via said transfer duct means and fluid flow accelerating passage means.
Claim 3
Dependent Claim
24 words
A fluid coupling according to claim 1 in which said fluid transfer duct means is formed as an integral part of said driven member.
Claim 4
Dependent Claim
32 words
A fluid coupling according to claim 1 in which the central portion of said part of said driving member is dished and said fluid transfer duct means extends into said dished portion.
Claim 5
Dependent Claim
30 words
A fluid coupling according to claim 1 further comprising means controlling said valve means in response to a parameter which varies with the degree of drive required from the coupling.
Claim 6
Dependent Claim
50 words
A fluid coupling according to claim 1 in which said part of said driving member defines an inner annular space and said flow accelerating passage means is in the form of passages extending from said annular space to orifice means at the periphery of said part of the driving member.
Claim 7
Dependent Claim
25 words
A fluid coupling according to claim 1 in which said flow accelerating passage means is in the form of a plurality of small individual passageways.
Claim 8
Dependent Claim
37 words
A fluid coupling according to claim 1 further comprising a meAns arranged on said driven member such that, when said driving member is rotated, a flow of fluid from said working chamber into the reservoir is created.
Claim 9
Dependent Claim
39 words
A fluid coupling according to claim 1 further comprising at least one axially directed orifice means in said part of said driving member, said orifice means establishing fluid connection between said flow accelerating passage means and said working chamber.
Claim 10
Dependent Claim
45 words
A fluid coupling according to claim 1 further comprising at least one axially directed orifice means extending through said part of said driving member located within said working chamber and positioned radially inwardly of the radially inner end of said fluid flow accelerating passage means.
Claim 11
Dependent Claim
35 words
A fluid coupling according to claim 2 in which said fluid transfer duct means comprises an axially directed annular flange on said driven member, said flange being positioned radially outwardly of said outlet port means.
Claim 12
Dependent Claim
27 words
A fluid coupling according to claim 8 in which said means arranged on said driven member comprises a scoop located in the vicinity of said inlet means.
References Cited (Backward Citations)
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Cited
US3007560A
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Cited
US3444748A
Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-22 | 1979-03-24 | 1979-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-22 | 1983-03-24 | 1983-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-22 | 1987-03-24 | 1987-09-23 | $7700.00 | Window Closed / Lapsed |