Patent US3260050A successfully refreshed from Google Patents.
US3788352A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flow limiter
Assignee: Airbus Group SAS
•
Filing: 1972-11-06
•
Granted: 1974-01-29
•
Expires: 1992-11-06
Abstract
Abstract Precision flow limiter in which a single hydraulic conduit contains a non-return valve urged against its seat by a spring, while an adjusting screw having a tapering ramp is adapted to cooperate with an axial abutment of said valve whereby to space the latter from its seat as required and accurately adjust the throttled flow.
Inventors
- 👤 J Ane
- 👤 J Teillard
- 👤 E Quere
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:29
CPC Classifications
F; F16; F16K; F16K47/00; F16K47/08; F16K47/10; F16K15/00; F16K15/02; F16K15/025; F16K15/06; F16K15/063; F16K15/18; F16K15/182; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7847; Y10T137/7848; Y10T137/7876; Y10T137/7877; Y10T137/7904; Y10T137/7922; Y10T137/7929
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
188 words
A flow limiter with hydraulic throttling valves, including a body formed with an axial conduit, a throttling slide-valve positioned for reciprocation within and along the axis of said conduit, adjustment chamber, a seat for said slide-valve provided at the entrance of said chamber, a resilient means biasing said throttling slide-valve to a closed position against said seat, said slide-valve having a conical bearing surface urged against said seat by said resilient means with a portion extending through said seat into said adjustment chamber, and an adjustment screw inserted into said chamber at right angle to the axis of said conduit, said adjustment screwing having a camming surface contacting said slide-valve portion, said slide-valve being lifted off its seat by the pressure of a hydraulic fluid in said adjustment chamber whereby to permit free flow of the fluid in one direction, movement of said adjustment screw along its axis at right angles to the axis of the conduit allowing of setting a slide-valve limit return position when the direction of flow is reversed, said limit return position opening a passageway of annular section between the slide-valve and its seat.
Claim 2
Dependent Claim
188 words
A flow limiter with hydraulic throttling valves, including a body formed with an axial conduit, a throttling slide-valve positioned for reciprocation within and along the axis of said conduit, adjustment chamber, a seat for said slide-valve provided at the entrance of said chamber, a resilient means biasing said throttling slide-valve to a closed position against said seat, said slide-valve having a conical bearing surface urged against said seat by said resilient means with a portion extending through said seat into said adjustment chamber, and an adjustment screw inserted into said chamber at right angle to the axis of said conduit, said adjustment screwing having a camming surface contacting said slide-valve portion, said slide-valve being lifted off its seat by the pressure of a hydraulic fluid in said adjustment chamber whereby to permit free flow of the fluid in one direction, movement of said adjustment screw along its axis at right angles to the axis of the conduit allowing of setting a slide-valve limit return position when the direction of flow is reversed, said limit return position opening a passageway of annular section between the slide-valve and its seat.
Claim 3
Dependent Claim
40 words
A flow limiter according to claim 1, in which said adjustment screw is formed with a frusto-conical camming surface, said slide-valve portion which penetrates into said adjustment chamber having an ogival tip adapted to abut against said frusto-conical camming surface.
Claim 4
Dependent Claim
24 words
A flow limiter according to claim 1, in which the bearing surfaces of the slide-valve and the adjustment screw are made of case-hardened steel.
Claim 5
Dependent Claim
39 words
A flow limiter according to claim 1 comprising a throttling chamber formed in said conduit, and in which said slide-valve is formed with a blind axial opening therein which has port through calibrated radial orifices in said throttling chamber.
Claim 6
Dependent Claim
31 words
A flow limiter according to claim 1, comprising a bleed chamber, a hole for receiving said adjustment screw formed with a recess having a flared wall leading into said bleed chamber.
Claim 7
Dependent Claim
30 words
A flow limiter according to claim 5, in which said adjustment screw is formed with a groove adapted to receive an O-ring up-stream to said recess and said bleed chamber.
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) | 1977-01-28 | 1977-07-30 | 1978-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-28 | 1981-07-30 | 1982-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-28 | 1985-07-30 | 1986-01-29 | $7700.00 | Window Closed / Lapsed |