Patent US5266967A successfully refreshed from Google Patents.
Patent US3799033A successfully refreshed from Google Patents.
US3799033A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Output reversing valves with by-pass position
Assignee: Renault SA
•
Filing: 1971-12-20
•
Granted: 1974-03-26
•
Expires: 1991-12-20
Abstract
Abstract An output reversing valve having a by-pass position for fluidpressure operated devices has a switching member comprising at least two closing members angularly shifted in relation to the pair of diametrally opposed fluid passage orifices, the closing members and passage orifices being shaped to conform to the first and second pairs of primary parts of the valve body. The first and second pairs of primary ports are connected to two pairs of secondary ports of the valve body. This valve is applicable notably to the field of hydrostatic transmissions of vehicles.
Inventors
- 👤 F Pruvot
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:05
CPC Classifications
F; F16; F16H; F16H61/00; F16H61/38; F16H61/40; F16H61/4061; F04; F04B; F04B1/00; F04B1/12; F04B1/20; F04B1/2014; F04B1/2042; F16H61/4043; F16K; F16K11/00; F16K11/02; F16K11/06; F16K11/072; F16K11/074
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
334 words
Output reversing valve with bypass position, which comprises a cylindrical switching member rotatable between two positions having two diametrally opposed fluid passage orifices, rotatably mounted between first and second flat faces of a valve body, a first pair of diametrally opposed primary ports comprising a primary inlet port and a primary outlet port formed in said valve body and opening into the plane of the first flat face and a second pair of diametrally opposed primary ports also formed in said valve body and opening into the plane of the second flat face, said ports being adapted to be interconnected through the fluid passage orifices formed in said switching member, characterized in that: a. the switching member comprises at least two closing members angularly shifted in relation to the diametrally opposed fluid passage orifices, b. the closing members and passage orifices are shaped to conform with said first and second pair of diametrally opposed primary ports of said valve body, and c. said first and second primary ports of said valve body are connected by pairs to two pairs of secondary ports opening into the plane of the first and second faces of said valve body, a first pair of diametrally opposed secondary ports comprisiNg a secondary inlet port and a secondary outlet port of said valve body being connected to the first paid of primary ports, a second pair of diametrally opposed secondary ports of said valve body being connected to the second pair of primary ports, whereby said first pair of secondary ports and said second pair of secondary ports are diametrally opposed and shifted respectively in two different directions in relation to the first pair of primary ports and to the second pair of primary ports, and in one position of said switching member said first pair of primary ports communicate with said second pair of primary ports, and in the other position of said switching member said pair of first secondary ports communicate with said second pair of secondary ports.
Claim 2
Dependent Claim
334 words
Output reversing valve with bypass position, which comprises a cylindrical switching member rotatable between two positions having two diametrally opposed fluid passage orifices, rotatably mounted between first and second flat faces of a valve body, a first pair of diametrally opposed primary ports comprising a primary inlet port and a primary outlet port formed in said valve body and opening into the plane of the first flat face and a second pair of diametrally opposed primary ports also formed in said valve body and opening into the plane of the second flat face, said ports being adapted to be interconnected through the fluid passage orifices formed in said switching member, characterized in that: a. the switching member comprises at least two closing members angularly shifted in relation to the diametrally opposed fluid passage orifices, b. the closing members and passage orifices are shaped to conform with said first and second pair of diametrally opposed primary ports of said valve body, and c. said first and second primary ports of said valve body are connected by pairs to two pairs of secondary ports opening into the plane of the first and second faces of said valve body, a first pair of diametrally opposed secondary ports comprisiNg a secondary inlet port and a secondary outlet port of said valve body being connected to the first paid of primary ports, a second pair of diametrally opposed secondary ports of said valve body being connected to the second pair of primary ports, whereby said first pair of secondary ports and said second pair of secondary ports are diametrally opposed and shifted respectively in two different directions in relation to the first pair of primary ports and to the second pair of primary ports, and in one position of said switching member said first pair of primary ports communicate with said second pair of primary ports, and in the other position of said switching member said pair of first secondary ports communicate with said second pair of secondary ports.
Claim 3
Dependent Claim
65 words
Valve according to claim 1, characterized in that said first and second faces of said valve body engage two annular sealing surfaces respectively, shaped and located at the outer periphery of said fluid passage orifices, on one side of said switching member, and provided with resilient flat seals also shaped to conform to said fluid passage orifices, on the opposite side of said switching member.
Claim 4
Dependent Claim
107 words
Valve according to claim 2, characterized in that at least one of the two faces of the valve body engages a flat annular sealing surface of the closing members associated with the valve body ports and movable in recesses formed in said switching member, whereby the state of unbalance in the hydraulic forces acting upon said closing members and against the bottom of said recesses urge said closing members against one face of said valve body and said switching member provided with said annular sealing surface registering with said closing member against the other face of said valve body, respectively, for sealing the ports of said body.
Claim 5
Dependent Claim
61 words
Valve according to claim 2, characterized in that each face of said switching member is provided with resilient flat seals mounted in back-to-back relationship and in sliding condition in the aforesaid fluid passage orifices of said switching member, whereby said seals engage the faces of said valve body as a consequence of the state of hydraulic unbalance acting on said seals.
Claim 6
Dependent Claim
62 words
Valve according to claim 3, characterized in that each closing member comprises a hole opening into the face of said closing member and that said hole is adapted to be closed by a valve member disposed between the bottom of the recesses of said switching member and the face of said closing member which is opposed to the flat sealing face thereof.
Claim 7
Dependent Claim
94 words
Valve according to claim 5, characterized in that said closing member is mounted in a blind recess opening into one of the faces of said switching member and that this switching member comprises annular sealing surfaces on its opposite face, said holes formed in said closing member for communicating the volume formed between the bottom of said blind recess and said closing member opening into said annular sealing surfaces, said face and said holes registering with other holes formed in said closing members and being adapted to be closed by the same valve member.
References Cited (Backward Citations)
US3230894A
Cited
US3616727A
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 |