US3630485A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Butterfly valve seat
Assignee: Crane Co
•
Filing: 1970-05-25
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Granted: 1971-12-28
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Expires: 1990-05-25
Abstract
Abstract A seat structure for butterfly valves in which shim means are inserted between two body rings to adjustably compress a resilient seat axially to thereby effect the desired radial clearance between the internal diameter of the seat and the disc closure member.
Inventors
- 👤 Hubert L Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:08
CPC Classifications
F; F16; F16K; F16K1/00; F16K1/16; F16K1/18; F16K1/22; F16K1/226; F16K1/2263
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
163 words
A butterfly valve comprising: a. a cylindrical valve body, said body having a continuous interior circumferential recess with opposing sidewalls; b. a resilient valve seat positioned in said recess adjacent one said wall; c. a valve disc rotatively mounted in said body in proximity to said seat; d. a pressure ring positioned in said recess adjacent said valve seat and adapted to compress said valve seat, said pressure ring having an offset portion whereby said pressure ring and said one wall overlie portions of said valve seat to prevent said seat from being dislodged from said body recess; e. a locking ring positioned in said recess between the other said sidewall and said pressure ring and overlying said offset portion of said pressure ring; f. shim means selectively positioned between said pressure ring and said locking ring, said shim means adapted to displace said compression ring toward said seat to thereby squeeze said seat out of said recess into contact with said disc.
Claim 2
Dependent Claim
163 words
A butterfly valve comprising: a. a cylindrical valve body, said body having a continuous interior circumferential recess with opposing sidewalls; b. a resilient valve seat positioned in said recess adjacent one said wall; c. a valve disc rotatively mounted in said body in proximity to said seat; d. a pressure ring positioned in said recess adjacent said valve seat and adapted to compress said valve seat, said pressure ring having an offset portion whereby said pressure ring and said one wall overlie portions of said valve seat to prevent said seat from being dislodged from said body recess; e. a locking ring positioned in said recess between the other said sidewall and said pressure ring and overlying said offset portion of said pressure ring; f. shim means selectively positioned between said pressure ring and said locking ring, said shim means adapted to displace said compression ring toward said seat to thereby squeeze said seat out of said recess into contact with said disc.
Claim 3
Dependent Claim
54 words
A valve as claimed in claim 1 wherein said offset portion has a circumferential channel in proximity thereto and wherein said shim means includes locking means comprising a projection on one end thereof adapted to be received by the circumferential recess in said pressure ring to thereby prevent said shims from being accidentally dislodged.
Claim 4
Dependent Claim
40 words
A valve as claimed in claim 2 wherein said sidewall adjacent said locking ring includes a circumferential groove, and, said locking ring includes a cam portion adapted to project into said groove to thereby prevent said rings from being dislodged.
Claim 5
Dependent Claim
38 words
A valve as claimed in claim 3 wherein said locking ring further includes slot means positioned on opposite sides thereof, said slot means adapted to receive a screwdriver to selectively separate said locking ring from said pressure ring.
Claim 6
Dependent Claim
15 words
A valve as claimed in claim 1 wherein said locking and pressure rings are segmental.
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) | 1974-12-27 | 1975-06-28 | 1975-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-27 | 1979-06-28 | 1979-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-27 | 1983-06-28 | 1983-12-28 | $7700.00 | Window Closed / Lapsed |