US3837357A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Check valve
Assignee: Anderson Greenwood and Co
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Filing: 1973-06-13
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Granted: 1974-09-24
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Expires: 1993-06-13
Abstract
Abstract A check valve having a body with a seat therein surrounding the flow passageway through the body, a valve member mounted within the body for movement to and from sealing engagement with the seat, the seat and valve member coacting to provide a pressure boosted soft seating seal and a metal to metal seal, a plurality of indicating pins supported in the seat and spaced inwardly from the outer of the seat sealing areas, the pins being positioned to be engaged by the valve member on seating, a sensor associated with each of the pins, closure indicating means connected to the sensors with the sensors in series so that actuation of all of the sensors by seating of the valve member actuates the indicating means to indicate closure of the valve member. This abstract is neither intended to define the invention of the application which, of course, is measured by the claims, nor is it intended to be limiting as to the scope of the invention in any way.
Inventors
- 👤 L Slaughter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:21
CPC Classifications
F; F16; F16K; F16K37/00; F16K37/0066; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7866; Y10T137/7867; Y10T137/7868; Y10T137/8158; Y10T137/8225; Y10T137/8242
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
171 words
A check valve comprising a body defining a passageway therethrough, a valve seat ring mounted in said body to project into said passageway, said valve seat ring having an annular resilient seat spaced outwardly from the inner edge of said valve seat ring, a valve member, means for mounting said valve member within said body for movement into and from engagement with said annular seat to close and open flow through said passageway, a plurality of pins extending through said valve seat ring at points inward from said annular seat and adapted to be engaged by said valve member when said valve member is in sealing engagement with said annular seat, a sensor associated with each of said pins, said sensors being positioned to be actuated by their pins when said pins are moved by engagement of said valve member, and means connected to said sensors for indicating the actuation of said sensors to show closure of flow through said passageway by engagement of said valve member on said annular seat.
Claim 2
Dependent Claim
171 words
A check valve comprising a body defining a passageway therethrough, a valve seat ring mounted in said body to project into said passageway, said valve seat ring having an annular resilient seat spaced outwardly from the inner edge of said valve seat ring, a valve member, means for mounting said valve member within said body for movement into and from engagement with said annular seat to close and open flow through said passageway, a plurality of pins extending through said valve seat ring at points inward from said annular seat and adapted to be engaged by said valve member when said valve member is in sealing engagement with said annular seat, a sensor associated with each of said pins, said sensors being positioned to be actuated by their pins when said pins are moved by engagement of said valve member, and means connected to said sensors for indicating the actuation of said sensors to show closure of flow through said passageway by engagement of said valve member on said annular seat.
Claim 3
Dependent Claim
28 words
A check valve according to claim 1, wherein said sensors are connected in series whereby said indicating means indicates closure when all of said sensors have been actuated.
Claim 4
Dependent Claim
19 words
A check valve according to claim 1, including means for adjusting the relationship between said pins and said sensors.
Claim 5
Dependent Claim
23 words
A check valve according to claim 1 wherein three of said pins are included and are spaced substantially equally around the annular seat,
Claim 6
Dependent Claim
31 words
A check valve according to claim 1 wherein said seat defines an annular moat and includes an annular diaphragm covering said moat to provide a soft seat for said valve member.
Claim 7
Dependent Claim
45 words
A check valve according to claim 5 including an inner retaining ring an outer retaining ring, said retaining rings clamping the inner and outer edges of said diaphragm, said inner retaining ring defining a secondary seating surface adapted to be engaged by said valve member.
References Cited (Backward Citations)
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US2509504A
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US2883147A
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US3371493A
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US3486618A
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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) | 1977-09-23 | 1978-03-25 | 1978-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-23 | 1982-03-25 | 1982-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-23 | 1986-03-25 | 1986-09-24 | $7700.00 | Window Closed / Lapsed |