US3563271A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flat slide valve
Assignee: Individual
•
Filing: 1968-11-01
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Granted: 1971-02-16
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Expires: 1988-11-01
Abstract
Abstract The present invention relates to a flat slide valve characterized in that a pair of spacers and a slide board having connecting ports and pressure balancing holes are fitted intimately between two guide plates having valve holes and pressure balancing holes, with the thickness of said slide board being formed slightly thinner than that of the spacers, and that the pressure balancing holes for preventing augmentation of controlling power of the slide board by fluid pressure are formed in communication with the corresponding valve holes in said two guide plates and said spacers.
Inventors
- 👤 Kazuyoshi Marumo
- 👤 Tetsuo Kukuminato
- 👤 Yoshihiro Nakada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:33
CPC Classifications
F; F15; F15C; F15C3/00; F15C3/02; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86574; Y10T137/8667
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
150 words
A flat slide valve, comprising a slide board having a plurality of connecting holes therethrough; a pair of spacers, one on each side of said slide board; and a pair of guide plates between which said slide board and said spacers are mounted, each of said guide plates having a plurality of valve holes and pressure balancing holes in communication with said valve holes, said valve holes and said pressure balancing holes in one guide plate being in alignment with the valve holes and pressure balancing holes in the other guide plate; one of said spacers having a plurality of pressure balancing holes in alignment with the pressure balancing holes of said guide plates; said Slide board being of less thickness than said spacers, whereby said slide board is freely movable between said guide plates and is suspended therebetween by fluid passing through said valve holes and pressure balancing holes.
Claim 2
Dependent Claim
150 words
A flat slide valve, comprising a slide board having a plurality of connecting holes therethrough; a pair of spacers, one on each side of said slide board; and a pair of guide plates between which said slide board and said spacers are mounted, each of said guide plates having a plurality of valve holes and pressure balancing holes in communication with said valve holes, said valve holes and said pressure balancing holes in one guide plate being in alignment with the valve holes and pressure balancing holes in the other guide plate; one of said spacers having a plurality of pressure balancing holes in alignment with the pressure balancing holes of said guide plates; said Slide board being of less thickness than said spacers, whereby said slide board is freely movable between said guide plates and is suspended therebetween by fluid passing through said valve holes and pressure balancing holes.
Claim 3
Dependent Claim
24 words
The valve of claim 1 wherein said pressure balancing holes of said guide plates are connected to said valve holes by transversely extending ports.
References Cited (Backward Citations)
US2875782A
Cited
US2897792A
Cited
US2986165A
Cited
GB911436A
Cited
US3028880A
Cited
US3370611A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-15 | 1974-08-17 | 1975-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-15 | 1978-08-17 | 1979-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-15 | 1982-08-17 | 1983-02-16 | $7700.00 | Window Closed / Lapsed |