Patent US3867960A successfully refreshed from Google Patents.
US3867960A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Five-way reversing valve
Assignee: Hitachi Ltd
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Filing: 1973-06-19
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Granted: 1975-02-25
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Expires: 1993-06-19
Abstract
Abstract This five-way reversing valve is of the type whereby the flowing directions of two pressurized fluids can be changed at the same time and in which the valve function is performed by utilizing the pressure difference between the two pressurized fluids. According to the present invention, the flows of pressurized fluids are changed by combined operations of elastic pressing means in the form of a coil spring or its equivalent and valve adjusting means having a valve opening and closing function. Thus, there is provided according to the present invention an improved valve device which is extremely low in cost and operates surely with high reliability.
Inventors
- 👤 Taisei Hosoda
- 👤 Hideo Uzuhashi
- 👤 Nobuyuki Kobayashi
- 👤 Masaaki Tanaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:21
CPC Classifications
F; F16; F16K; F16K11/00; F16K11/02; F16K11/06; F16K11/065; F25; F25B; F25B13/00; F25B41/00; F25B41/20; F25B41/26; F25B2313/00; F25B2313/023; F25B2313/025; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86574; Y10T137/86582; Y10T137/86614; Y10T137/86718; Y10T137/86726; Y10T137/86839
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
265 words
A five-way reversing valve comprising: a cylindrical body; a cover secured to said body in a fluid-tight manner to close one end of said body; a spring casing secured to said body in a fluid-right manner to close another end of said body; five pipes connected to said body and being axially aligned along said body, said pipes communicating with the interior of said body; a first of said pipes being disposed nearest said cover and the fifth of said pipes being disposed nearest said spring casing, the remaining three of said pipes being disposed between the first and fifth pipes; plunger means slidably received within said body and provided with a concave portion formed thereon, the ends of said plunger means and said cover and spring casing defining tubular chambers in said body; a clearance being defined between said plunger means and said body through which high pressure fluid leaks into the tubular chambers provided at both ends of said plunger means; spring means provided in said spring casing for biasing said plunger means toward said cover; a pipe connected to said spring casing and communicating with the interior of said spring casing and, through passage means, with the low pressure side of said valve; a valve controlling mechanism located between Said passage means for opening and closing said passage means; and auxiliary valves loosely and independently received in said concave portion in said plunger means in such manner that each of said five pipes can be in change-over communication with an adjacent pipe of said five pipes by means of said auxiliary valves.
Claim 2
Dependent Claim
265 words
A five-way reversing valve comprising: a cylindrical body; a cover secured to said body in a fluid-tight manner to close one end of said body; a spring casing secured to said body in a fluid-right manner to close another end of said body; five pipes connected to said body and being axially aligned along said body, said pipes communicating with the interior of said body; a first of said pipes being disposed nearest said cover and the fifth of said pipes being disposed nearest said spring casing, the remaining three of said pipes being disposed between the first and fifth pipes; plunger means slidably received within said body and provided with a concave portion formed thereon, the ends of said plunger means and said cover and spring casing defining tubular chambers in said body; a clearance being defined between said plunger means and said body through which high pressure fluid leaks into the tubular chambers provided at both ends of said plunger means; spring means provided in said spring casing for biasing said plunger means toward said cover; a pipe connected to said spring casing and communicating with the interior of said spring casing and, through passage means, with the low pressure side of said valve; a valve controlling mechanism located between Said passage means for opening and closing said passage means; and auxiliary valves loosely and independently received in said concave portion in said plunger means in such manner that each of said five pipes can be in change-over communication with an adjacent pipe of said five pipes by means of said auxiliary valves.
Claim 3
Dependent Claim
19 words
A five-way reversing valve according to claim 1, wherein said first and fifth pipes are high-pressure coolant fluid conduits.
Claim 4
Dependent Claim
18 words
A five-way reversing valve according to claim 2, wherein said auxiliary valves are made of high polymer material.
Claim 5
Dependent Claim
54 words
A five-way reversing valve according to claim 1, wherein the end of said plunger means facing said spring casing has a tapered corner portion and the inner face of said spring casing has a stepped portion such that the corner portion will abut against said stepped portion in one position of said plunger means.
References Cited (Backward Citations)
US2828767A
Cited
US3004557A
Cited
US2976701A
Cited
US3245424A
Cited
US3180347A
Cited
US3646851A
Cited
US3736958A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-02-24 | 1978-08-26 | 1979-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-24 | 1982-08-26 | 1983-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-24 | 1986-08-26 | 1987-02-25 | $7700.00 | Window Closed / Lapsed |