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US3672629A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-bleed pilot valve
Assignee: Sorteberg Controls Corp
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Filing: 1970-05-18
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Granted: 1972-06-27
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Expires: 1990-05-18
Abstract
Abstract A swivel joint between two interconnected members in a pilot valve which are responsive to force differentials and capable of being extremely sensitive to these force differentials so as to initiate the proper motion to equalize the forces throughout. In the preferred embodiment, the swivel joint comprises a firmly seated ball bearing in the plunger of the pilot valve and an exhaust tube which incorporates a contact post and a biasing spring to urge and maintain the exhaust tube assembly in continual contact with the ball bearing. This arrangement allows the plunger to pivot freely while the exhaust tube can move laterally with a minimization of frictional contact. The result is a pilot valve which is extremely sensitive and responsive to pressure variations. Pilot valve sensitivity is additionally increased by axially incorporating a pinion with the exhaust tube, while establishing a gap therebetween. This construction provides an unobstructed, controllable path for exhausting gaseous fluids.
Inventors
- 👤 Johannes Sorteberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:20
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/12; F16K31/126; G; G06; G06G; G06G3/00; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86919
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
100 words
A pilot valve comprising: A. a diaphragm movable in response to pressure differentials; B. an elongated hollow valve operating member for following the motion of said diaphragm; C. means forming a swivel joint between said diaphragm and said member and comprising: a. an apical bearing surface mounted to said diaphragm, b. a spring biasing one end of said member against said surface, and c. a pinion pressed into the hollow, spring biased end of said member; whereby said member follows said diaphragm in its axial motion and said diaphragm is free to swivel without imparting angular motion to said member.
Claim 2
Dependent Claim
100 words
A pilot valve comprising: A. a diaphragm movable in response to pressure differentials; B. an elongated hollow valve operating member for following the motion of said diaphragm; C. means forming a swivel joint between said diaphragm and said member and comprising: a. an apical bearing surface mounted to said diaphragm, b. a spring biasing one end of said member against said surface, and c. a pinion pressed into the hollow, spring biased end of said member; whereby said member follows said diaphragm in its axial motion and said diaphragm is free to swivel without imparting angular motion to said member.
Claim 3
Dependent Claim
14 words
A pilot valve as defined in claim 1 wherein said bearing is a ball.
Claim 4
Dependent Claim
111 words
A pilot valve comprising: A. a diaphragm movable in response to pressure differentials; B. an elongated valve operating member for following the motion of said diaphragm; C. means forming a swivel joint between said diaphragm and said member whereby said member follows said diaphragm in its axial motion and said diaphragm is free to swivel without imparting angular motion to said member; D. a hollow exhaust tube connected for motion with said valve operating member; and E. a pinion pressed into the hollow end of said exhaust tube providing a substantially non-obstructed, controllable fluid exhaust path between the teeth of said pinion and the inner portion of said hollow exhaust tube.
Claim 5
Dependent Claim
111 words
A pilot valve comprising: A. a diaphragm movable in response to pressure differentials; B. an elongated valve operating member for following the motion of said diaphragm; C. means forming a swivel joint between said diaphragm and said member whereby said member follows said diaphragm in its axial motion and said diaphragm is free to swivel without imparting angular motion to said member; D. a hollow exhaust tube connected for motion with said valve operating member; and E. a pinion pressed into the hollow end of said exhaust tube providing a substantially non-obstructed, controllable fluid exhaust path between the teeth of said pinion and the inner portion of said hollow exhaust tube.
Claim 6
Dependent Claim
47 words
A pilot valve as defined in claim 3, wherein said swivel joint comprises a flexible rod comprising a relatively uniform cross section throughout and interconnected with said exhaust tube and said diaphragm assuring simultaneous movement of said diaphragm and said exhaust tube in response to pressure variations.
References Cited (Backward Citations)
FR958435A
Cited
US1008120A
Cited
FR557707A
Cited
US2171613A
Cited
US2482291A
Cited
US2564569A
Cited
US3240223A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-27 | 1975-12-27 | 1976-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-27 | 1979-12-27 | 1980-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-27 | 1983-12-27 | 1984-06-27 | $7700.00 | Window Closed / Lapsed |