US3828822A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjustable pressure control valve
Assignee: Individual
•
Filing: 1973-05-21
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Granted: 1974-08-13
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Expires: 1993-05-21
Abstract
Abstract A pressure regulating valve which is readily adjustable in continuous operation, for regulating the outlet pressure of a fluid, liquid or gas, flowing through the valve, said valve being capable of maintaining a uniform outlet pressure despite variations in the rate of flow or in the inlet line pressure. The valve contains a flexible tubing or bladder through which the fluid flows, with a lever arm resting along the length of the tubing. The lever arm is backed against a roller which may be located at any point along the length of the lever arm, so as to vary the pivot point of the lever arm as rotated by the pressure exerted by the tubing against both sides of the pivot point. Rotation of the lever arm in the closing direction acts to clamp the input end of the tubing so as to restrict the flow of fluid into the tubing and thus restrict the outlet fluid pressure.
Inventors
- 👤 T Witte
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:31
CPC Classifications
F; F16; F16K; F16K7/00; F16K7/02; F16K7/04; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7781; Y10T137/7793; Y10T137/7804
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
272 words
A valve for regulating the flow and pressure of a fluid passing through the valve from an inlet orifice to an outlet end, in which said fluid is confined within a flexible tube in the valve, with the operating mechanism of the valve protected from contact with the fluid enclosed in the flexible tube, said flexible tube being of elastic properties so as to expand under increased internal fluid pressure, with a lever arm resting along the external longitudinal length of the flexible tube, said lever arm being held against theflexible tube by the force of biasing means located near the outlet end of said tube, and by a pivot member which may be adjustably located to a fixed position along the length of the lever arm, such that expansion of the flexible tube caused by the internal pressure of fluid within the tube causes the lever arm to rotate when the pivot member is positioned so that there is an imbalance of rotational moment applied to the lever arm by the sum of the moments exerted by the flexible tube against the lever arm on both sides of the pivot member, combined with the force exerted by the biasing means, with the rotational movement of the lever arm in the closing direction acting to force a bearing section of the lever arm resting against the flexible tube to constrict the flexible tube against an external stop mounted in the unit, so as to reduce the internal inlet orifice of the flexible tube at the position of such constriction with a consequent reduction in fluid pressure in the flexible tube outlet section.
Claim 2
Dependent Claim
272 words
A valve for regulating the flow and pressure of a fluid passing through the valve from an inlet orifice to an outlet end, in which said fluid is confined within a flexible tube in the valve, with the operating mechanism of the valve protected from contact with the fluid enclosed in the flexible tube, said flexible tube being of elastic properties so as to expand under increased internal fluid pressure, with a lever arm resting along the external longitudinal length of the flexible tube, said lever arm being held against theflexible tube by the force of biasing means located near the outlet end of said tube, and by a pivot member which may be adjustably located to a fixed position along the length of the lever arm, such that expansion of the flexible tube caused by the internal pressure of fluid within the tube causes the lever arm to rotate when the pivot member is positioned so that there is an imbalance of rotational moment applied to the lever arm by the sum of the moments exerted by the flexible tube against the lever arm on both sides of the pivot member, combined with the force exerted by the biasing means, with the rotational movement of the lever arm in the closing direction acting to force a bearing section of the lever arm resting against the flexible tube to constrict the flexible tube against an external stop mounted in the unit, so as to reduce the internal inlet orifice of the flexible tube at the position of such constriction with a consequent reduction in fluid pressure in the flexible tube outlet section.
Claim 3
Dependent Claim
44 words
The combination as recited in claim 1 in which said biasing means is a compression spring fitted with an adjustment screw which bears against one end of the compression spring so as to regulate the compressive force of the spring against the lever arm.
Claim 4
Dependent Claim
73 words
The combination as recited in claiM 2 in which the adjustable pivot member is fastened to a screw which rides in a slot in an external wall of the valve unit, said slot axis being generally parallel to the axis of the flexible tube, with the pivot member and attached screw fixed in position when the head of said screw is tightened against the external face of the valve wall bearing said slot.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-12 | 1978-02-11 | 1978-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-12 | 1982-02-11 | 1982-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-12 | 1986-02-11 | 1986-08-13 | $7700.00 | Window Closed / Lapsed |