Patent US3899887A successfully refreshed from Google Patents.
US3899887A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic coupling with reservoir
Assignee: CLUARAN ASSOCIATES Ltd
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Filing: 1974-09-11
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Granted: 1975-08-19
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Expires: 1994-09-11
Abstract
Abstract The application is concerned with hydraulic couplings of the type having a reservoir into which the coupling working liquid can be transferred to reduce its power transmission capacity. This reservoir is movable between a coupling emptying position in which the liquid flows into it from the coupling under gravity, and a coupling filling position in which the liquid flows from the reservoir to the coupling interior under gravity.
Inventors
- 👤 John E Becker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:10
CPC Classifications
F; F16; F16D; F16D33/00; F16D33/06
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
78 words
A hydraulic coupling comprising cooperating pump and turbine elements each having radial vortex-producing vanes and together forming a working chamber, a reservoir for working fluid operative with at least one of the pump and turbine elements, the reservoir being movable between a coupling emptying position in which coupling working liquid can flow thereto from the working chamber under gravity and a coupling filling position in which coupling working liquid can flow therefrom to the working chamber under gravity.
Claim 2
Dependent Claim
78 words
A hydraulic coupling comprising cooperating pump and turbine elements each having radial vortex-producing vanes and together forming a working chamber, a reservoir for working fluid operative with at least one of the pump and turbine elements, the reservoir being movable between a coupling emptying position in which coupling working liquid can flow thereto from the working chamber under gravity and a coupling filling position in which coupling working liquid can flow therefrom to the working chamber under gravity.
Claim 3
Dependent Claim
48 words
A hydraulic coupling as claimed in claim 1, wherein an external casing surrounds the pump and turbine elements and the reservoir is mounted on the casing radially outwardly therefrom with its interior connected to the interior of the working chamber at the radially outermost part of the chamber.
Claim 4
Dependent Claim
44 words
A hydraulic coupling as claimed in claim 2, wherein the reservoir is of semi-annular shape and is provided at its ends with radially extending ducts conveying liquid from the reservoir interior into the working chamber close to the axis of rotation of the coupling.
Claim 5
Dependent Claim
58 words
A hydraulic coupling as claimed in claim 2, wherein there are provided position-sensitive valves through which thE reservoir interior is connected to the working chamber interior at the radially outermost part of the latter, the said valves being open when the reservoir is in the coupling emptying position and closed when it is in the coupling filling position.
Claim 6
Dependent Claim
15 words
A hydraulic coupling as claimed in claim 4, wherein the said valves are weight operated.
Claim 7
Dependent Claim
45 words
A hydraulic coupling as claimed in claim 1, wherein an external casing surrounds the pump and turbine elements, the reservoir is mounted on the casing alongside the working chamber, and the working chamber is provided with means directing the liquid therein into the reservoir interior.
Claim 8
Dependent Claim
50 words
A hydraulic coupling as claimed in claim 6, wherein there are provided position-sensitive valves through which the reservoir interior is connected to the working chamber interior, the said valves being open when the reservoir is in the coupling emptying position and closed when it is in the coupling filling position.
Claim 9
Dependent Claim
15 words
A hydraulic coupling as claimed in claim 7, wherein the said valves are weight operated.
Claim 10
Dependent Claim
30 words
A hydraulic coupling as claimed in claim 6, wherein the means directing liquid from the working chamber into the reservoir comprise catch means intercepting the liquid in the working chamber.
Claim 11
Dependent Claim
53 words
A hydraulic coupling as claimed in claim 9, wherein there are provided position-sensitive valves through which the said catch means direct liquid from the working chamber into the reservoir, the said valves being open when the reservoir is in the coupling emptying position and closed when it is in the coupling filling position.
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) | 1978-08-18 | 1979-02-17 | 1979-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-18 | 1983-02-17 | 1983-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-18 | 1987-02-17 | 1987-08-19 | $7700.00 | Window Closed / Lapsed |