US3918681A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve seat insert
Assignee: Hale Fire Pump Co
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Filing: 1974-05-30
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Granted: 1975-11-11
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Expires: 1994-05-30
Abstract
Abstract The present disclosure relates to a valve comprising a casing having inlet and outlet ports and a rotary valve element operable between a closed position blocking flow between the inlet and outlet ports and an open position permitting flow therethrough. An annular seal seat insert is mounted in a pocket formed in said casing for axial movement therein and is in registry with one of the ports and in sealing engagement with the valve element. A sealing ring is mounted in the pocket and engageable by the seal seat insert. The seal seat insert comprises a reinforcing member having a generally cylindrical annular portion underlying the pocket and an offset outwardly directed flange and an insert housing made of a resilient material at least partially encapsulating the reinforcing member on the surface thereof confronting the valve element and including a bulbous section adjacent the flange portion having a peripheral bead engageable with the valve element and rear face engaging the sealing ring.
Inventors
- 👤 H Alfred Eberhardt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:00
CPC Classifications
F; F16; F16K; F16K5/00; F16K5/08; F16K5/14; F16K5/20; F16K5/204; F16K5/06; F16K5/0663; F16K5/0673; F16K5/0678
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
145 words
A valve comprising a casing having inlet and outlet ports and a rotary valve element operable between a first position closing flow between said ports and a second position permitting flow therethrough, an annular seal seat insert mounted for axial movement in a pocket formed in said casing in registration with one of said ports and in sealing engagement with said valve element, a sealing ring mounted in said pocket and engageable by said seat seal insert, said seat seal insert comprising a generally cylindrical annular portion underlying said pocket and an offset outwardly directed flange and an insert housing made of a resilient material at least partially encapsulating said reinforcing member on the surface thereof confronting said valve member and including a bulbous section adjacent the flange portion having a peripheral bead engageable with said valve element and rear face engaging said sealing ring.
Claim 2
Dependent Claim
145 words
A valve comprising a casing having inlet and outlet ports and a rotary valve element operable between a first position closing flow between said ports and a second position permitting flow therethrough, an annular seal seat insert mounted for axial movement in a pocket formed in said casing in registration with one of said ports and in sealing engagement with said valve element, a sealing ring mounted in said pocket and engageable by said seat seal insert, said seat seal insert comprising a generally cylindrical annular portion underlying said pocket and an offset outwardly directed flange and an insert housing made of a resilient material at least partially encapsulating said reinforcing member on the surface thereof confronting said valve member and including a bulbous section adjacent the flange portion having a peripheral bead engageable with said valve element and rear face engaging said sealing ring.
Claim 3
Dependent Claim
103 words
A valve as claimed in claim 1 wherein the radial depth of said pocket is greater than the maximum radial cross section of said sealing ring in the relaxed state so that when the valve element is in a closed position fluid pressure in said pocket resulting from pressurized Fluid in either port will displace said sealing ring radially in said pocket into compressive engagement with said insert and wall of said pocket which is relatively remote from the port from which pressure is applied and expand said sealing ring axially to seal the potential leakage path along radial sidewalls defining said pocket.
Claim 4
Dependent Claim
26 words
A valve as claimed in claim 1 wherein the frustoconical flange is outwardly directed relative to said cylindrical annular portion at an angle of about 45*.
Claim 5
Dependent Claim
70 words
A valve as claimed in claim 1 wherein said pocket is defined in part by a stepped configuration in said casing including generally parallel inner and outer radially spaced axially extending wall portions connected by a generally radially disposed wall portion and wherein the rear face of said bulbous section is generally radially directed and circumferentially extending and confronts and is spaced from said radial wall portion of said pocket.
Claim 6
Dependent Claim
26 words
A valve as claimed in claim 4 wherein the diameter of said sealing ring is of a dimension smaller than the radial depth of said pocket.
Claim 7
Dependent Claim
54 words
A valve as claimed in claim 4 wherein the cylindrical annular portion of said reinforcing member is of a diameter slightly smaller than the diameter of the inner axial wall portion of said casing to facilitate free axial movement of said insert relative to said casing thereby preloading said sealing ring in said pocket.
Claim 8
Dependent Claim
44 words
A valve as claimed in claim 1 wherein said seat seal insert includes a generally cylindrical lead portion projecting from said flange and the edge thereof opposite said cylindrical annular portion and including means defining a plurality of circumferentially spaced openings in said flange.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-11-10 | 1979-05-12 | 1979-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-10 | 1983-05-12 | 1983-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-10 | 1987-05-12 | 1987-11-11 | $7700.00 | Window Closed / Lapsed |