US3920036A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ball valve
Assignee: PMB Inc A CORP OF
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Filing: 1973-12-10
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Granted: 1975-11-18
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Expires: 1993-12-10
Abstract
Abstract A ball valve having a pair of seat rings, of wedge shape cross section, to fit against and clampingly secure the ball therebetween. A pair of seat ring retainer means, having side walls inclined downwardly and inwardly, wedge the ball and seat rings therebetween. Spring means maintains a sufficient downward force directly on the seat rings to keep the ball, seat rings, seat ring retainer means, and body in tight engagement. Each seat ring includes an outer ring and an inner sealing ring. The inner ring has a slotted and tapered cross section portion which causes a spring action as the inner ring is forced deeply into a tapered recess formed in the outer ring, thereby compressing the legs formed at the slot closer together into a preloaded condition. Another feature of the invention is a combination drain plug and ball extractor associated with the body.
Inventors
- 👤 Georg Karl Westenrieder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:05
CPC Classifications
F; F16; F16K; F16K5/00; F16K5/06; F16K5/0626; F16K5/0636; F16K5/08; F16K5/14; F16K5/20; F16K5/201; F16K5/202; Y; Y10; Y10T; Y10T137/00; Y10T137/598; Y10T137/6031; Y10T137/6035; Y10T137/6038; Y10T137/6041; Y10T137/6045
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
227 words
A ball valve comprising: a. a body having two longitudinally aligned fluid passages and a lateral opening communicating with a central space; b. a rotatable ball positioned within said central space and having an opening therethrough communicable with said fluid passages; c. seat ring means positioned against and clampingly securing said ball therebetween; d. bonnet means secured to said body in covering relationship to said seat ring means and said ball; e. a rotatable valve stem, projecting through sAid lateral opening and said bonnet means, connected to said ball for rotating said ball between positions, permitting and preventing the passage of fluid therethrough; f. said seat ring means including an outer retaining ring and an inner sealing ring received within a tapered annular recess in said outer retaining ring, said inner sealing ring having a sealing surface positioned to contact said ball and an outer portion of tapered cross section wedged into said tapered annular recess, said outer portion having an annular slot formed integrally therein to define a pair of leg portions which are compressed towards each other as said outer portion is wedged into said annular recess so as to force said inner sealing ring out of said annular recess into tighter contact against said ball; and g. spring means disposed within said annular slot to provide a stiffer spring action to said leg portions.
Claim 2
Dependent Claim
227 words
A ball valve comprising: a. a body having two longitudinally aligned fluid passages and a lateral opening communicating with a central space; b. a rotatable ball positioned within said central space and having an opening therethrough communicable with said fluid passages; c. seat ring means positioned against and clampingly securing said ball therebetween; d. bonnet means secured to said body in covering relationship to said seat ring means and said ball; e. a rotatable valve stem, projecting through sAid lateral opening and said bonnet means, connected to said ball for rotating said ball between positions, permitting and preventing the passage of fluid therethrough; f. said seat ring means including an outer retaining ring and an inner sealing ring received within a tapered annular recess in said outer retaining ring, said inner sealing ring having a sealing surface positioned to contact said ball and an outer portion of tapered cross section wedged into said tapered annular recess, said outer portion having an annular slot formed integrally therein to define a pair of leg portions which are compressed towards each other as said outer portion is wedged into said annular recess so as to force said inner sealing ring out of said annular recess into tighter contact against said ball; and g. spring means disposed within said annular slot to provide a stiffer spring action to said leg portions.
Claim 3
Dependent Claim
172 words
A ball valve comprising: a. a body having two longitudinally aligned fluid passages and a lateral opening communicating with a central space; b. a rotatable ball positioned within said central space and having an opening therethrough communicable with said fluid passages; c. seat ring means positioned against and clampingly securing said ball therebetween; d. bonnet means secured to said body in covering relationship to said seat ring means and said ball; e. A rotatable valve stem, projecting through said lateral opening and said bonnet means, connected to said ball for rotating said ball between positions permitting and preventing the passage of fluid therethrough; and f. drain plug means threadedly received within an opening formed in said body directly below said ball, said drain plug means having a cavity formed therein in facing relationship to said ball for support of an extractor pin therein, said extractor pin being effective to lift said ball free from its clamped position upon the upward movement of said drain plug means within said opening in said body.
Claim 4
Dependent Claim
172 words
A ball valve comprising: a. a body having two longitudinally aligned fluid passages and a lateral opening communicating with a central space; b. a rotatable ball positioned within said central space and having an opening therethrough communicable with said fluid passages; c. seat ring means positioned against and clampingly securing said ball therebetween; d. bonnet means secured to said body in covering relationship to said seat ring means and said ball; e. A rotatable valve stem, projecting through said lateral opening and said bonnet means, connected to said ball for rotating said ball between positions permitting and preventing the passage of fluid therethrough; and f. drain plug means threadedly received within an opening formed in said body directly below said ball, said drain plug means having a cavity formed therein in facing relationship to said ball for support of an extractor pin therein, said extractor pin being effective to lift said ball free from its clamped position upon the upward movement of said drain plug means within said opening in said body.
Claim 5
Dependent Claim
48 words
The invention as defined in claim 2 wherein said extractor pin and said cavity are of ''''T'''' shape, said extractor pin having a storage position substantially confined within said cavity and an inverted ejecting position with a portion extending upward from said cavity for contact with said ball.
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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) | 1978-11-17 | 1979-05-19 | 1979-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-17 | 1983-05-19 | 1983-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-17 | 1987-05-19 | 1987-11-18 | $7700.00 | Window Closed / Lapsed |