US3726302A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure regulating valve
Assignee: RTX Corp
•
Filing: 1972-01-12
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Granted: 1973-04-10
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Expires: 1992-01-12
Abstract
Abstract The time responsiveness of a pressure regulating valve is increased by including a metering element mounted on the main valve element being movable therewith and relative thereto so as to respond to changes in pressure in the system independently of the main valve element. Pressure droop can be adjusted independently of flow droop, thereby permitting optimum performance.
Inventors
- 👤 J Lawsing
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:50
CPC Classifications
G; G05; G05D; G05D7/00; G05D7/01; G05D7/0126; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2574; Y10T137/2579; Y10T137/2582; Y10T137/2584; Y10T137/2594; Y10T137/2597; Y10T137/7722; Y10T137/7781; Y10T137/7784; Y10T137/7787; Y10T137/7788; Y10T137/7791
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
98 words
For a pressure regulating valve of the type that includes a housing, a centrally disposed spool member in the housing adapted to be positioned to meter fluid through an opening in said housing for bypassing a metering member whose pressure is regulated by the pressure regulating valve, the improvement comprising means cooperatively connected to said spool member and being movable therewith and relative thereto and being responsive to pressure fluctuations upstream and downstream of said opening for changing the area of said opening at a rate which is faster relative to the time responsiveness of said spool member.
Claim 2
Dependent Claim
98 words
For a pressure regulating valve of the type that includes a housing, a centrally disposed spool member in the housing adapted to be positioned to meter fluid through an opening in said housing for bypassing a metering member whose pressure is regulated by the pressure regulating valve, the improvement comprising means cooperatively connected to said spool member and being movable therewith and relative thereto and being responsive to pressure fluctuations upstream and downstream of said opening for changing the area of said opening at a rate which is faster relative to the time responsiveness of said spool member.
Claim 3
Dependent Claim
24 words
For a pressure regulating valve as claimed in claim 1 wherein said means includes a metering element coaxially disposed relative to said spool member.
Claim 4
Dependent Claim
31 words
For a pressure regulating valve as claimed in claim 2 including a flexible resilient pressure sensitive means mounted adjacent one end of said metering element and bearing against said spool member.
Claim 5
Dependent Claim
20 words
For a pressure regulating valve as claimed in claim 3 wherein said flexible, resilient, pressure sensitive means is a bellows.
Claim 6
Dependent Claim
32 words
For a pressure regulating valve as claimed in claim 3 including another flexible, resilient pressure sensitive means mounted adjacent another end of said metering element and also bearing against said spool member.
Claim 7
Dependent Claim
22 words
For a pressure regulating valve as claimed in claim 1 wherein the pressure droop can be adjusted independently of the flow droop.
Claim 8
Dependent Claim
128 words
For a pressure regulating valve of the type that includes a housing; a spool member having axially spaced flanges centrally disposed in the housing and adapted to be positioned to meter fluid through an opening in said housing for bypassing a metering member whose pressure is regulated by the pressure regulating valve, the improvement comprising a flow adjusting means coaxially mounted on said spool member, and a pressure responsive member disposed between said flow adjusting means and one of said flanges and sized to move said flow adjusting means with and relative to said spool member and being responsive to pressure fluctuations upstream and downstream of said opening for changing the area of said opening at a rate faster than the rate of movement of said spool member.
Claim 9
Dependent Claim
128 words
For a pressure regulating valve of the type that includes a housing; a spool member having axially spaced flanges centrally disposed in the housing and adapted to be positioned to meter fluid through an opening in said housing for bypassing a metering member whose pressure is regulated by the pressure regulating valve, the improvement comprising a flow adjusting means coaxially mounted on said spool member, and a pressure responsive member disposed between said flow adjusting means and one of said flanges and sized to move said flow adjusting means with and relative to said spool member and being responsive to pressure fluctuations upstream and downstream of said opening for changing the area of said opening at a rate faster than the rate of movement of said spool member.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-09 | 1976-10-09 | 1977-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-09 | 1980-10-09 | 1981-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-09 | 1984-10-09 | 1985-04-10 | $7700.00 | Window Closed / Lapsed |