US3589386A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pilot valve
Assignee: Air-Con Inc
•
Filing: 1969-09-02
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Granted: 1971-06-29
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Expires: 1989-09-02
Abstract
Abstract A pressure-operated valve having a ball piston means between opposed seats in which a spacer positions one of the seats so that the cumulative spacing between the piston and the seats is equal to the thickness of the spacer. In other words, when the spacer is removed, the ball piston means is in contact with both seats.
Inventors
- 👤 Walter R Chapman
- 👤 Willis R Wolfe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 21:15
CPC Classifications
F; F16; F16K; F16K15/00; F16K15/02; F16K15/04; F16K15/044; F16K15/042; F16K17/00; F16K17/02; F16K17/04; F16K17/0406; Y; Y10; Y10T; Y10T137/00; Y10T137/5109; Y10T137/598; Y10T137/6031; Y10T137/6035; Y10T137/6038; Y10T137/7722; Y10T137/7738; Y10T137/7837; Y10T137/7904; Y10T137/7922; Y10T137/7927; Y10T137/7928
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
226 words
A valve comprising a body having an inlet and an outlet, first and second seat members respectively having first and second sharp cornered coaxial annular seats spaced from and presented toward each other, the outlet communicating with the space between the seats and the inlet communicating with the first seat member remote from its seat, the first seat member having a press fit in the body so that it remains in the position in which it is placed, a first shoulder on said body surrounding the second bore, the second seat member having a second shoulder adapted to stop against said first shoulder, a piston between the seats having ball means for engaging the seats, and means for clamPing the second shoulder against the first shoulder, removable spacing means for varying the spacing between said first and second seats whereby the first and second seat members and ball means may be assembled in two modes respectively with and without the spacing means so the spacing between the seat members in said modes differ by the thickness of the spacing means and in one mode the ball means is in engagement with both seats and the first seat member is pressed into the body and in the other mode the cumulative spacing between the ball means and seats is equal to the thickness of the spacing means.
Claim 2
Dependent Claim
226 words
A valve comprising a body having an inlet and an outlet, first and second seat members respectively having first and second sharp cornered coaxial annular seats spaced from and presented toward each other, the outlet communicating with the space between the seats and the inlet communicating with the first seat member remote from its seat, the first seat member having a press fit in the body so that it remains in the position in which it is placed, a first shoulder on said body surrounding the second bore, the second seat member having a second shoulder adapted to stop against said first shoulder, a piston between the seats having ball means for engaging the seats, and means for clamPing the second shoulder against the first shoulder, removable spacing means for varying the spacing between said first and second seats whereby the first and second seat members and ball means may be assembled in two modes respectively with and without the spacing means so the spacing between the seat members in said modes differ by the thickness of the spacing means and in one mode the ball means is in engagement with both seats and the first seat member is pressed into the body and in the other mode the cumulative spacing between the ball means and seats is equal to the thickness of the spacing means.
Claim 3
Dependent Claim
12 words
The valve of claim 1 in which the piston comprises a ball.
Claim 4
Dependent Claim
26 words
The valve of claim 1 in which the piston comprises a carrier with a ball at opposite ends presented respectively to the first and second seats.
Claim 5
Dependent Claim
21 words
The valve of claim 1 in which the body has a bore in which the second seat has a sliding fit.
Claim 6
Dependent Claim
28 words
The valve of claim 1 having in addition spring means exerting a force on the piston in the direction to move the piston away from the second seat.
Claim 7
Dependent Claim
87 words
The valve of claim 7 in which the second seat member has a sliding fit in the body so that by initially assembling the valve seats and ball means in the body with the spacer omitted and the shoulders in contact with each other and with the ball means in engagement with both seats and then removing the second seat member and reassembling with the spacer present accurate spacing of the seats is obtained and the effect of manufacturing tolerances in the initially assembled parts is eliminated.
Claim 8
Dependent Claim
21 words
The valve of claim 1 in which the spacing means in said other mode is between the first and second shoulders.
Claim 9
Dependent Claim
78 words
The valve of claim 1 in which the second seat member has a sliding fit in the body so that by initially assembling the valve seats and ball means in the body in one mode and with the ball means in engagement with both seats and then removing the second seat member and reassembling in the other mode accurate spacing of the seats is obtained and the effect of manufacturing tolerances in the initially assembled parts is eliminated.
References Cited (Backward Citations)
US2704549A
Cited
US3055388A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-28 | 1974-12-28 | 1975-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-28 | 1978-12-28 | 1979-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-28 | 1982-12-28 | 1983-06-29 | $7700.00 | Window Closed / Lapsed |