US3857407A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure regulator
Assignee: Individual
•
Filing: 1973-09-24
•
Granted: 1974-12-31
•
Expires: 1993-09-24
Abstract
Abstract A pressure regulator has a movable valve element which is positioned in response to the inlet and the outlet pressure of fluid flowing through the regulator and a variable spring force as determined by the calibration setting. A shut-off arrangement is incorporated in the pressure regulator for enabling the valve to be closed and opened without affecting the calibration setting.
Inventors
- 👤 D Olson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:13
CPC Classifications
G; G05; G05D; G05D16/00; G05D16/04; G05D16/06; G05D16/063; G05D16/0644; G05D16/0655; G05D16/0658; A; A01; A01G; A01G25/00; A01G25/16; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7781; Y10T137/7782; Y10T137/7793; Y10T137/7822; Y10T137/7823; Y10T137/7825
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
363 words
A pressure regulator of the kind used in irrigation systems for shutting off the flow through the regulator without changing the effective biasing force which regulates the pressure output, said pressure regulator comprising, a housing, an inlet for fluid at a high inlet pressure, an outlet for fluid at a lower, regulated outlet pressure, valve means including a valve seat and a movable valve element for controlling the fluid flow between the inlet and outlet, pressure responsive means responsive to the inlet and outlet pressures for positioning the valve element, said pressure responsive means including a piston connected to the movable valve element and having a surface exposed to the inlet pressure and a diaphragm connected to the movable valve element and having one surface exposed to the outlet pressure, adjustable calibration means associated with the pressure responsive means for applying a selected amount of a biasing force to the diaphragm and valve element, said adjustable calibration means including a spring engaged with the diaphragm on the side opposite the side exposed to the inlet pressure and a screw for varying the force exerted by the spring on the diaphragm and movable valve element, a cylindrical boss extending outward of the housing, a cylinder in the boss mounting the piston for reciprocation therein, retaining means for limiting outward movement of the piston under the biasing force exerted by said spring in the full open position of the valve means, an extension formed integrally with the piston and dimensioned to extend outward beyond the end of the boss when the piston is engaged with the snap ring, and a cap threaded on the end of the boss and engageable with said extension to move the valve element into engagement with the valve seat against the bias of the spring when the cap is turned down on the boss and also rotatable outward on the boss to a position in which the cap is disengaged from the extension as the piston engages the retaining means whereby the cap can be used to close and to open the pressure regulator to fluid flow without changing the effective biasing force set by the screw on the spring.
Claim 2
Dependent Claim
363 words
A pressure regulator of the kind used in irrigation systems for shutting off the flow through the regulator without changing the effective biasing force which regulates the pressure output, said pressure regulator comprising, a housing, an inlet for fluid at a high inlet pressure, an outlet for fluid at a lower, regulated outlet pressure, valve means including a valve seat and a movable valve element for controlling the fluid flow between the inlet and outlet, pressure responsive means responsive to the inlet and outlet pressures for positioning the valve element, said pressure responsive means including a piston connected to the movable valve element and having a surface exposed to the inlet pressure and a diaphragm connected to the movable valve element and having one surface exposed to the outlet pressure, adjustable calibration means associated with the pressure responsive means for applying a selected amount of a biasing force to the diaphragm and valve element, said adjustable calibration means including a spring engaged with the diaphragm on the side opposite the side exposed to the inlet pressure and a screw for varying the force exerted by the spring on the diaphragm and movable valve element, a cylindrical boss extending outward of the housing, a cylinder in the boss mounting the piston for reciprocation therein, retaining means for limiting outward movement of the piston under the biasing force exerted by said spring in the full open position of the valve means, an extension formed integrally with the piston and dimensioned to extend outward beyond the end of the boss when the piston is engaged with the snap ring, and a cap threaded on the end of the boss and engageable with said extension to move the valve element into engagement with the valve seat against the bias of the spring when the cap is turned down on the boss and also rotatable outward on the boss to a position in which the cap is disengaged from the extension as the piston engages the retaining means whereby the cap can be used to close and to open the pressure regulator to fluid flow without changing the effective biasing force set by the screw on the spring.
Claim 3
Dependent Claim
21 words
The invention defined in claim 1 wherein the retaining means is a snap ring seated in a groove in the cylinder.
References Cited (Backward Citations)
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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) | 1977-12-30 | 1978-07-01 | 1978-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-30 | 1982-07-01 | 1982-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-30 | 1986-07-01 | 1986-12-31 | $7700.00 | Window Closed / Lapsed |