US3717323A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ball valves
Assignee: Crane Co
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Filing: 1971-09-24
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Granted: 1973-02-20
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Expires: 1991-09-24
Abstract
Abstract A ball valve having a novel seat arrangement whereby the seat rings, placed on opposite sides of the ball closure member, are each retained by a ferrule which is screwed into the valve body. The ferrule secures and positions the seat ring in a manner whereby the seat is advanced toward the ball to simultaneously form a seal between a counterbore in the valve body and the outer periphery of the seat, and, to preload the seat against the surface of the ball closure member, forming a seal therebetween. Such simultaneous forming of seals is assisted by a tapered conical surface of contact between seat rings and their respective ferrule. Thus, the advancement of the ferrule toward the seat results in a seal being established simultaneously between the seat and the body, and, the ball closure member and seat.
Inventors
- 👤 E Geipel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:05
CPC Classifications
F; F16; F16K; F16K5/00; F16K5/08; F16K5/14; F16K5/20; F16K5/201; F16K5/06; F16K5/0626
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
155 words
A ball valve comprising: a. a generally cylindrical valve housing having an inlet and outlet, said housing having a central portion of reduced diameter forminG spaced apart circumferential shoulders; b. a ball closure member having a passage therethrough adapted to be rotated into and out of communication with said inlet and outlet; c. an annular flexible valve seat including a front face positioned against each said circumferential shoulder to locate said seat in reference to said ball, and, a back portion having an inverted, conical truncated recess; and, d. a ferrule adapted to be axially positioned against each of said valve seats, said ferrule having a conical, truncated portion adapted to be received by said recess to thereby simultaneously seal said seat against said valve body in the proximity of said shoulder and position said seat against said ball to preload said seat when said ferrule is advanced to position said seat against said shoulder.
Claim 2
Dependent Claim
155 words
A ball valve comprising: a. a generally cylindrical valve housing having an inlet and outlet, said housing having a central portion of reduced diameter forminG spaced apart circumferential shoulders; b. a ball closure member having a passage therethrough adapted to be rotated into and out of communication with said inlet and outlet; c. an annular flexible valve seat including a front face positioned against each said circumferential shoulder to locate said seat in reference to said ball, and, a back portion having an inverted, conical truncated recess; and, d. a ferrule adapted to be axially positioned against each of said valve seats, said ferrule having a conical, truncated portion adapted to be received by said recess to thereby simultaneously seal said seat against said valve body in the proximity of said shoulder and position said seat against said ball to preload said seat when said ferrule is advanced to position said seat against said shoulder.
Claim 3
Dependent Claim
155 words
A ball valve comprising: a. a generally cylindrical valve housing having an inlet and outlet, said housing having a central portion of reduced diameter forminG spaced apart circumferential shoulders; b. a ball closure member having a passage therethrough adapted to be rotated into and out of communication with said inlet and outlet; c. an annular flexible valve seat including a front face positioned against each said circumferential shoulder to locate said seat in reference to said ball, and, a back portion having an inverted, conical truncated recess; and, d. a ferrule adapted to be axially positioned against each of said valve seats, said ferrule having a conical, truncated portion adapted to be received by said recess to thereby simultaneously seal said seat against said valve body in the proximity of said shoulder and position said seat against said ball to preload said seat when said ferrule is advanced to position said seat against said shoulder.
Claim 4
Dependent Claim
155 words
A ball valve comprising: a. a generally cylindrical valve housing having an inlet and outlet, said housing having a central portion of reduced diameter forminG spaced apart circumferential shoulders; b. a ball closure member having a passage therethrough adapted to be rotated into and out of communication with said inlet and outlet; c. an annular flexible valve seat including a front face positioned against each said circumferential shoulder to locate said seat in reference to said ball, and, a back portion having an inverted, conical truncated recess; and, d. a ferrule adapted to be axially positioned against each of said valve seats, said ferrule having a conical, truncated portion adapted to be received by said recess to thereby simultaneously seal said seat against said valve body in the proximity of said shoulder and position said seat against said ball to preload said seat when said ferrule is advanced to position said seat against said shoulder.
Claim 5
Dependent Claim
26 words
A ball valve as claimed in claim 1 wherein said conical truncated portion and conical truncated recess converge substantially toward the center of said closure member.
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) | 1976-02-20 | 1976-08-21 | 1977-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-20 | 1980-08-21 | 1981-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-20 | 1984-08-21 | 1985-02-20 | $7700.00 | Window Closed / Lapsed |