Patent US3799201A successfully refreshed from Google Patents.
US3799201A
Expired / Lapsed
US
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Distributor valve for an internally shafted orbital piston machine
Assignee: Danfoss AS
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Filing: 1973-04-05
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Granted: 1974-03-26
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Expires: 1993-04-05
Abstract
Abstract The invention relates to the distributor valve aspects of an internally shafted orbital piston machine. The distributor valve includes a fixed and movable valve part with the movable valve part being biased against the fixed valve part by an axially movable plunger. A central bearing bushing between the fixed and movable valve parts provides for precise centering of the movable valve. The fixed valve part is formed by brazing together two annular elements.
Inventors
- 👤 G Hansen
- 👤 R Christensen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:44
CPC Classifications
F; F04; F04C; F04C2/00; F04C2/08; F04C2/10; F04C2/103; F04C2/105; F01; F01C; F01C1/00; F01C1/08; F01C1/10; F01C1/104; F01C1/105; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86574; Y10T137/86638
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
65 words
A rotary piston machine comprising a casing, a stationary disc shaped valve fixedly mounted in said casing, a rotatable disc shaped valve in abutting and relatively rotatable relation to said stationary valve, said valves having concentric counterbores in mutually adjacent relation to each other, a bearing bushing in said counterbores being fixedly attached to said stationary valve and being a journal for said rotatable valve.
Claim 2
Dependent Claim
65 words
A rotary piston machine comprising a casing, a stationary disc shaped valve fixedly mounted in said casing, a rotatable disc shaped valve in abutting and relatively rotatable relation to said stationary valve, said valves having concentric counterbores in mutually adjacent relation to each other, a bearing bushing in said counterbores being fixedly attached to said stationary valve and being a journal for said rotatable valve.
Claim 3
Dependent Claim
52 words
A rotary piston machine according to claim 1 wherein said rotatable valve has an annular shaped bearing surface on the side thereof opposite said stationary valve, and an axially movable plunger in said casing in biasing engagement with said rotatable valve bearing surface for urging said rotatable valve towards said stationary valve.
Claim 4
Dependent Claim
43 words
A rotary piston machine according to claim 2 wherein said casing has concentric bores with one of said bores being a counterbore relative to the other of said bores, said plunger having stepped cylindrically shaped surfaces in respective bearing engagement with said bores.
Claim 5
Dependent Claim
47 words
A rotary piston machine according to claim 2 wherein said rotatable valve and said plunger form respectively with said casing first and second annularly shaped channels, said annular channels being separated by said bearing surface of said rotatable valve which is in sealing engagement with said plunger.
Claim 6
Dependent Claim
39 words
A rotary piston machine according to claim 4 including a first set of passages extending through said rotatable valve, and passages in said plunger providing fluid communication between said second annularly shaped channel and said first set of passages.
Claim 7
Dependent Claim
21 words
A rotary piston machine according to claim 1 wherein said stationary valve consists of two annularly shaped elements metallurgically attached together.
References Cited (Backward Citations)
US3680987A
Cited
US3572983A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-03-25 | 1977-09-24 | 1978-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-25 | 1981-09-24 | 1982-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-25 | 1985-09-24 | 1986-03-26 | $7700.00 | Window Closed / Lapsed |