US3608587A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Single spindle four-way valve
Assignee: Ross Operating Valve Co
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Filing: 1969-08-06
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Granted: 1971-09-28
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Expires: 1989-08-06
Abstract
Abstract A housing has a bore with two working ports separated by an inlet port, two exhaust ports being located outside of the working ports. A spindle has a constant force applied to one end and signal pressure at the other end. Two oppositely facing poppet valves carried by the spindle engage seats disposed between the exhaust ports and the working ports. A third valve element carries two oppositely facing poppet valves engaging seats between the working ports and the inlet port. This lastmentioned element has slight play with respect to the spindle.
Inventors
- 👤 Richard P Zbell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:23
CPC Classifications
F; F15; F15B; F15B13/00; F15B13/02; F15B13/04; F15B13/0401; F15B13/0405; F16; F16K; F16K11/00; F16K11/10; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86574; Y10T137/86622; Y10T137/8663; Y10T137/8667; Y10T137/86686
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
346 words
In a four-way valve, a valve body having a central inlet port, a pair of working ports on opposite sides of said inlet port and a pair of exhaust ports on the outsides of said working ports, a bore in said valve body, a valve spindle exteNding through said bore, said valve spindle having three valve elements carried thereby, one of said valve elements carrying a poppet-type seal at one end thereof engageable with a seat disposed between one of the working ports and its adjacent exhaust port and facing said exhaust port, a second valve element carrying a poppet-type valve seal at one end thereof engageable with a seat disposed between the other working port and its adjacent exhaust port and facing said exhaust port, and a third valve element mounted in a chamber of the valve body connected to said inlet port, said third valve element being of unitary construction, having slight axial play with respect to the spindle and carrying a pair of oppositely facing poppet-type seals engageable with seats disposed between the inlet port and the two working ports and facing said inlet port, means constantly urging said spindle in a first direction in which one of the working ports is connected to the inlet port and the other working port is connected to its adjacent exhaust port, said last-mentioned means comprising a seal carried by said first valve element at the end opposite said poppet-type seal and fitting in a bore portion in said valve body to form a chamber, means for pressurizing said last-mentioned chamber, means for selectively counteracting said constant urging means and shifting said valve to a second position in which the first-mentioned working port is connected to exhaust and the second-mentioned working port is connected to the inlet port, said last-mentioned means comprising a seal carried by said second valve element at the end opposite said poppet-type seal and fitting in a bore in a second bore portion of said valve body to form a chamber therewith, and means for applying signal pressure to said last-mentioned chamber.
Claim 2
Dependent Claim
346 words
In a four-way valve, a valve body having a central inlet port, a pair of working ports on opposite sides of said inlet port and a pair of exhaust ports on the outsides of said working ports, a bore in said valve body, a valve spindle exteNding through said bore, said valve spindle having three valve elements carried thereby, one of said valve elements carrying a poppet-type seal at one end thereof engageable with a seat disposed between one of the working ports and its adjacent exhaust port and facing said exhaust port, a second valve element carrying a poppet-type valve seal at one end thereof engageable with a seat disposed between the other working port and its adjacent exhaust port and facing said exhaust port, and a third valve element mounted in a chamber of the valve body connected to said inlet port, said third valve element being of unitary construction, having slight axial play with respect to the spindle and carrying a pair of oppositely facing poppet-type seals engageable with seats disposed between the inlet port and the two working ports and facing said inlet port, means constantly urging said spindle in a first direction in which one of the working ports is connected to the inlet port and the other working port is connected to its adjacent exhaust port, said last-mentioned means comprising a seal carried by said first valve element at the end opposite said poppet-type seal and fitting in a bore portion in said valve body to form a chamber, means for pressurizing said last-mentioned chamber, means for selectively counteracting said constant urging means and shifting said valve to a second position in which the first-mentioned working port is connected to exhaust and the second-mentioned working port is connected to the inlet port, said last-mentioned means comprising a seal carried by said second valve element at the end opposite said poppet-type seal and fitting in a bore in a second bore portion of said valve body to form a chamber therewith, and means for applying signal pressure to said last-mentioned chamber.
Claim 3
Dependent Claim
74 words
The combination according to claim 1, the effective areas of said poppet-type valve seals being the same, the effective area of said seal forming the constant pressure chamber being larger than the effective area of any one of said poppet-type valves, the effective area of said seal forming the signal chamber being greater than the combined areas of any one of the poppet-type valve seals and said seal forming the constant urging means chamber.
Claim 4
Dependent Claim
70 words
The combination according to claim 2, said spindle having a pair of shoulders between which said third valve element is disposed, the spindle passing through a bore in said third valve element, said last-mentioned bore having a slightly larger diameter than the spindle to permit slight rocking of the third valve element, and an annular seal carried within the bore of said third valve element and engageable with said spindle.
References Cited (Backward Citations)
GB191027121A
Cited
US2969775A
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Cited
FR1309819A
Cited
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Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-27 | 1975-03-29 | 1975-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-27 | 1979-03-29 | 1979-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-27 | 1983-03-29 | 1983-09-28 | $7700.00 | Window Closed / Lapsed |