US3556474A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual sealed ball valves
Assignee: Individual
•
Filing: 1968-08-19
•
Granted: 1971-01-19
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Expires: 1988-08-19
Abstract
Abstract An improved valve, having a seat assembly provided with dual seals, which may be used in the upstream and downstream position. In the downstream position, one seal is a pressure-responsivetype seal and is exposed to pressure in the valve chamber, and the other seal is a secondary compression-type seal. In the upstream position, one seal is a pressure-responsive-type seal and is exposed to pressure in the inlet of the valve, and the other seal is a secondary compression-type seal. The seat structure is so designed to protect the seals from being damaged when the valve member contacts the seat assembly, and is capable of relieving excessive body pressure in the valve chamber.
Inventors
- 👤 Domer Scaramucci
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:16
CPC Classifications
F; F16; F16K; F16K5/00; F16K5/06; F16K5/0663; F16K5/0673
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
207 words
A valve comprising: a body having an inlet opening, a valve chamber, and an outlet opening therein forming a flow passageway therethrough; a valve member supported in the a valve chamber for opening and closing the flow passageway through the valve; and a seat assembly in the valve chamber around one of said openings cooperating with the adjacent walls of the valve chamber and valve member to close the flow passageway through the valve body, said seat assembly comprising: a ring of relatively inflexible material having a valve-seating surface formed between the inner and outer peripheries thereof; an inner seal means disposed in the valve-seating surface, having a portion thereof extending beyond said seating surface and exposed to the pressure in the valve chamber; and an outer seal means disposed in the valve-seating surface having a portion thereof extending beyond said seating surface and exposed to the pressure in the opening forming a part of the flow passageway wherein the valve-seating surface of the ring is substantially flat, having a central portion thereof relatively tangent to the valve member and the inner and outer edges of the valve-seating surface are spaced from the valve member when the central portion of the valve-seating surface engages the valve member.
Claim 2
Dependent Claim
207 words
A valve comprising: a body having an inlet opening, a valve chamber, and an outlet opening therein forming a flow passageway therethrough; a valve member supported in the a valve chamber for opening and closing the flow passageway through the valve; and a seat assembly in the valve chamber around one of said openings cooperating with the adjacent walls of the valve chamber and valve member to close the flow passageway through the valve body, said seat assembly comprising: a ring of relatively inflexible material having a valve-seating surface formed between the inner and outer peripheries thereof; an inner seal means disposed in the valve-seating surface, having a portion thereof extending beyond said seating surface and exposed to the pressure in the valve chamber; and an outer seal means disposed in the valve-seating surface having a portion thereof extending beyond said seating surface and exposed to the pressure in the opening forming a part of the flow passageway wherein the valve-seating surface of the ring is substantially flat, having a central portion thereof relatively tangent to the valve member and the inner and outer edges of the valve-seating surface are spaced from the valve member when the central portion of the valve-seating surface engages the valve member.
Claim 3
Dependent Claim
44 words
The valve of claim 1 wherein the inner and outer seal means are disposed on opposite sides of said tangent portion. 3 The valve of claim 2 wherein the inner seal means has a diameter greater than the diameter of the outer seal member.
Claim 4
Dependent Claim
43 words
The valve of claim 1 wherein the ring includes a nonvalve-member end providing an annular shoulder facing away from the valve member for engaging a wall of the valve chamber when the ring is forced away from the center of the valve chamber.
Claim 5
Dependent Claim
20 words
The valve of claim 1 wherein each of the inner and outer seal means has a generally rectangular cross section.
Claim 6
Dependent Claim
46 words
The valve of claim 1 wherein each of the inner and outer seal means has a portion having a generally rectangular cross section disposed in the valve seating surface, and a bead portion which extends beyond the valve seating surface to sealingly contact the valve member.
Claim 7
Dependent Claim
26 words
The valve of claim 1 wherein the outer periphery of the ring is sized to provide a sliding fit of the ring in the valve body.
Claim 8
Dependent Claim
25 words
The valve of claim 7 wherein the ring includes a seal member disposed in the outer periphery thereof sized to sealingly engage the valve body.
Claim 9
Dependent Claim
21 words
The valve of claim 8 wherein the seal member has a diameter larger than the diameter of the inner seal means.
Claim 10
Dependent Claim
42 words
The valve of claim 7 wherein the ring includes a seal member carried by the ring between the outer periphery and the nonvalve-member end thereof having a portion extending beyond the nonvalve-member end of the ring to sealingly engage the valve body.
Claim 11
Dependent Claim
11 words
The valve of claim 1 wherein the valve member is spherically-shaped.
Claim 12
Dependent Claim
25 words
The valve of claim 1 wherein the ring includes a flange portion extending axially from the nonvalve-member end adjacent the inner periphery of The ring.
Claim 13
Dependent Claim
29 words
The valve of claim 12 wherein the ring includes an elastomer pad bonded to the nonvalve-member end of the flange portion and sized to sealingly engage the valve body.
Claim 14
Dependent Claim
27 words
The valve of claim 1 wherein the ring includes an elastomer pad bonded to the valve member end thereof and sized to sealingly engage the valve body.
Claim 15
Dependent Claim
21 words
The valve of claim 13 wherein the elastomer pad has a diameter larger than the diameter of the outer seal means.
Claim 16
Dependent Claim
19 words
The valve of claim 1 defined further to include a second seat assembly around the other of said openings.
Claim 17
Dependent Claim
149 words
A valve seat for a ball valve, comprising: a ring of relatively inflexible material having a substantially flat seating surface formed between the inner and outer peripheries thereof formed at an angle such that when a central portion thereof is contacted by a valve ball, the inner and outer edges of the valve seating surface are spaced from the valve ball; an inner seal means disposed in the valve seating surface on one side of said central portion, having a portion thereof extending beyond said seating surface for exposure to the pressure in the chamber of a valve in which the seat is used; and an outer seal means disposed in the valve seating surface on the opposite side of said central portion from the inner seal means, having a portion thereof extending beyond said seating surface for exposure to the pressure at the inner periphery of the seat.
Claim 18
Dependent Claim
149 words
A valve seat for a ball valve, comprising: a ring of relatively inflexible material having a substantially flat seating surface formed between the inner and outer peripheries thereof formed at an angle such that when a central portion thereof is contacted by a valve ball, the inner and outer edges of the valve seating surface are spaced from the valve ball; an inner seal means disposed in the valve seating surface on one side of said central portion, having a portion thereof extending beyond said seating surface for exposure to the pressure in the chamber of a valve in which the seat is used; and an outer seal means disposed in the valve seating surface on the opposite side of said central portion from the inner seal means, having a portion thereof extending beyond said seating surface for exposure to the pressure at the inner periphery of the seat.
Claim 19
Dependent Claim
40 words
The valve seat of claim 17 wherein each of inner and outer seal means has a generally rectangular cross section. 19 The valve seat of claim 17 wherein the ring includes a seal member disposed in the outer periphery thereof.
Claim 20
Dependent Claim
42 words
The valve seat of claim 17 wherein the ring includes a flange portion extending axially from the end thereof opposite said seating surface adjacent the inner periphery of the ring, and an elastomer pad bonded to the end of the flange portion.
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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) | 1974-01-18 | 1974-07-20 | 1975-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-18 | 1978-07-20 | 1979-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-18 | 1982-07-20 | 1983-01-19 | $7700.00 | Window Closed / Lapsed |