Patent US3719344A successfully refreshed from Google Patents.
US3719344A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ball valve seating assemblies
Assignee: Crane Process Flow Technologies Ltd
•
Filing: 1971-08-16
•
Granted: 1973-03-06
•
Expires: 1991-08-16
Abstract
Abstract A ball valve of the type having a ball with a flow passage therethrough rotatably mounted in a bore in a valve casing in engagement with seating rings of extrudable material disposed on opposite sides of the ball and urged into sealing contact with the ball by spring-urged backing rings having conical surfaces confronting similar conical surfaces of the seating rings wherein the confronting conical surfaces of at least one of the cooperating backing and sealing ring pairs are so shaped as to be separated over a major part of their axial extent by a gap which tapers in a direction away from the ball.
Inventors
- 👤 G Jones
- 👤 H Leek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:16
CPC Classifications
F; F16; F16K; F16K5/00; F16K5/06; F16K5/0663; F16K5/0673; F16K5/0678
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
105 words
A ball valve of the type having a ball with a flow passage therethrough rotatably mounted in a bore in a valve casing in engagement with seating rings of extrudable material disposed on opposite sides of the ball and urged into sealing contact with the ball by spring-urged backing rings having conical surfaces confronting similar conical surfaces of the seating rings wherein the confronting conical surfaces of at least one of the cooperating backing and sealing ring pairs are so shaped as to be separated over a major part of their axial extent by a gap which tapers in a direction away from the ball.
Claim 2
Dependent Claim
105 words
A ball valve of the type having a ball with a flow passage therethrough rotatably mounted in a bore in a valve casing in engagement with seating rings of extrudable material disposed on opposite sides of the ball and urged into sealing contact with the ball by spring-urged backing rings having conical surfaces confronting similar conical surfaces of the seating rings wherein the confronting conical surfaces of at least one of the cooperating backing and sealing ring pairs are so shaped as to be separated over a major part of their axial extent by a gap which tapers in a direction away from the ball.
Claim 3
Dependent Claim
105 words
A ball valve of the type having a ball with a flow passage therethrough rotatably mounted in a bore in a valve casing in engagement with seating rings of extrudable material disposed on opposite sides of the ball and urged into sealing contact with the ball by spring-urged backing rings having conical surfaces confronting similar conical surfaces of the seating rings wherein the confronting conical surfaces of at least one of the co-operating backing and sealing ring pairs are so shaped as to be separated over a major part of their axial extent by a gap which tapers in a direction away from the ball.
Claim 4
Dependent Claim
105 words
A ball valve of the type having a ball with a flow passage therethrough rotatably mounted in a bore in a valve casing in engagement with seating rings of extrudable material disposed on opposite sides of the ball and urged into sealing contact with the ball by spring-urged backing rings having conical surfaces confronting similar conical surfaces of the seating rings wherein the confronting conical surfaces of at least one of the co-operating backing and sealing ring pairs are so shaped as to be separated over a major part of their axial extent by a gap which tapers in a direction away from the ball.
Claim 5
Dependent Claim
20 words
A ball valve as claimed in claim 1 wherein the angle of taper of said gap is approximately 5* .
Claim 6
Dependent Claim
22 words
A ball valve as claimed in claim 1 wherein the gap extends over two thirds the axial extent of the co-operating surfaces.
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) | 1976-03-05 | 1976-09-04 | 1977-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-05 | 1980-09-04 | 1981-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-05 | 1984-09-04 | 1985-03-06 | $7700.00 | Window Closed / Lapsed |