Patent US3841347A successfully refreshed from Google Patents.
US3841347A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary valve
Assignee: Individual
•
Filing: 1972-12-11
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Granted: 1974-10-15
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Expires: 1992-12-11
Abstract
Abstract A rotary valve having a stationary sealing plate operatively engaged with the outer surface of a rotatable valve element for providing a complete seal and for effecting a cutting action when impurities are caught in between the sealing plate and the valve element.
Inventors
- 👤 K Kushida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:55
CPC Classifications
F; F16; F16K; F16K5/00; F16K5/06; F16K5/0626; F16K5/0642; F16K5/0663; F16K5/0673; F16K5/08; F16K5/14; F16K5/20; F16K5/205; F16K5/208; Y; Y10; Y10T; Y10T137/00; Y10T137/4238; Y10T137/4245; Y10T137/4273
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
112 words
In a rotary valve, a sealing plate provided at the boundary between a valve chamber containing a rotatable valve element therein and a fluid inlet, said sealing plate comprising a relatively thin elastic disc member welded to a relatively thick, rigid disc member, both of said disc members having openings therein, the inner peripheral edge of said elastic disc member defining a circular opening having a cutting edge, said cutting edge engaging the outer surface of said valve element when said valve is closed, said elastic disc member being of a material having sufficient hardness to effect a cutting of fibers or the like between said cutting edge and said valve element.
Claim 2
Dependent Claim
112 words
In a rotary valve, a sealing plate provided at the boundary between a valve chamber containing a rotatable valve element therein and a fluid inlet, said sealing plate comprising a relatively thin elastic disc member welded to a relatively thick, rigid disc member, both of said disc members having openings therein, the inner peripheral edge of said elastic disc member defining a circular opening having a cutting edge, said cutting edge engaging the outer surface of said valve element when said valve is closed, said elastic disc member being of a material having sufficient hardness to effect a cutting of fibers or the like between said cutting edge and said valve element.
Claim 3
Dependent Claim
194 words
A rotary valve comprising a valve body having a valve chamber therein, said valve body having an internal annularly extending recess providing a cylindrical surface, a valve element rotatably mounted within said valve chamber, a housing member providing a fluid inlet removablY secured to said valve member, a sealing plate disposed within said annularly extending recess between said housing and said valve body, said sealing plate comprising a relatively thin elastic disc member welded to a relatively thick, rigid disc member, both of said disc members having openings therein, the inner peripheral edge of said elastic disc member defining a circular opening and having a cutting edge, said cutting edge engaging the outer surface of said valve element when said valve is closed, said elastic disc member being of a material having sufficient hardness to effect a cutting of fibers or the like between said cutting edge and said valve element, the outer diameter of said sealing plate being less than the diameter of said cylindrical surface whereby said sealing plate can be moved transversely to the flow axis of said valve to allow positioning of said sealing plate relative to said valve element.
Claim 4
Dependent Claim
194 words
A rotary valve comprising a valve body having a valve chamber therein, said valve body having an internal annularly extending recess providing a cylindrical surface, a valve element rotatably mounted within said valve chamber, a housing member providing a fluid inlet removablY secured to said valve member, a sealing plate disposed within said annularly extending recess between said housing and said valve body, said sealing plate comprising a relatively thin elastic disc member welded to a relatively thick, rigid disc member, both of said disc members having openings therein, the inner peripheral edge of said elastic disc member defining a circular opening and having a cutting edge, said cutting edge engaging the outer surface of said valve element when said valve is closed, said elastic disc member being of a material having sufficient hardness to effect a cutting of fibers or the like between said cutting edge and said valve element, the outer diameter of said sealing plate being less than the diameter of said cylindrical surface whereby said sealing plate can be moved transversely to the flow axis of said valve to allow positioning of said sealing plate relative to said valve element.
References Cited (Backward Citations)
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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) | 1977-10-14 | 1978-04-15 | 1978-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-14 | 1982-04-15 | 1982-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-14 | 1986-04-15 | 1986-10-15 | $7700.00 | Window Closed / Lapsed |