US3817154A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for supplying fluid to a reversible drive organ
Assignee: Poclain SA
•
Filing: 1973-05-22
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Granted: 1974-06-18
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Expires: 1993-05-22
Abstract
Abstract Fluid supply system for a double acting fluid drive mechanism having first and second drive chambers, the system including a pump whose delivery is connected by a first conduit to the first chamber, a second conduit connecting the second chamber to a reservoir and including a one-way valve permitting flow only to the reservoir, a third conduit coupled to the second conduit, bypassing the one-way valve and including a flow limiter, a fourth conduit connected to the first conduit and to the flow limiter, which latter comprises a discharge valve operable to maintain pressure in the third conduit upstream of the discharge valve and an adjustable valve between the second chamber and the discharge valve operable to control the pressure delivered by the second chamber in response to pressure in the fourth conduit.
Inventors
- 👤 L Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:39
CPC Classifications
F; F15; F15B; F15B11/00; F15B11/02; F15B11/04; F15B11/044; F15B13/00; F15B13/01; F15B13/015; F15B2211/00; F15B2211/20; F15B2211/205; F15B2211/2053; F15B2211/20538; F15B2211/30; F15B2211/305; F15B2211/30525; F15B2211/32; F15B2211/321; F15B2211/324; F15B2211/40; F15B2211/405; F15B2211/40515; F15B2211/40576; F15B2211/40584; F15B2211/46; F15B2211/70; F15B2211/705; F15B2211/7051; F15B2211/7053; F15B2211/75
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
346 words
Apparatus for supplying fluid to a reversible drive organ, which is linked to a load which provides its forced drive during the operating phase in question and which has first and second chambers, this supply apparatus consisting of: a fluid reservoir, a pump connected to the said reservoir by a suction conduit, a first conduit which connects the delivery side of the pump to the first of the said chambers, this first chamber forming the fluid intake chamber during the above-mentioned operating phase, a second conduit which connects the second of the said chambers to the reservoir, this second chamber forming the fluid delivery chamber during the said operating phase, a non-return valve which is arranged in the second conduit and only allows passage of the fluid towards the latter chamber, a third conduit which is connected to thE said second conduit on either side of the non-return valve and in which an adjustable flow-limiter is arranged, a fourth conduit which is connected, on the one hand, to the first conduit and, on the other hand, to the flow-regulating organ of the said flow-limiter, characterised in that the adjustable flow-limiter itself consists of: an adjusted discharge-valve, which acts to maintain the pressure of the fluid which can be contained in the portion of the third conduit which is connected to the said discharge-valve and is arranged directly downstream of this valve relative to the reservoir, substantially equal to a given value, and a valve with adjustable opening, which is arranged between the drive organ and the discharge-valve and is distinct from this discharge-valve, and the function of which is to regulate the value of the pressure of the fluid which can be delivered out of the second chamber during the above-mentioned operating phase, while this valve with adjustable opening has an organ for adjusting its opening, which is in equilibrium under the antagonistic influences, on the one hand, of the pressure of the fluid contained in the fourth conduit and, on the other hand, of the fluid pressure which is substantially equal to the given value.
Claim 2
Dependent Claim
346 words
Apparatus for supplying fluid to a reversible drive organ, which is linked to a load which provides its forced drive during the operating phase in question and which has first and second chambers, this supply apparatus consisting of: a fluid reservoir, a pump connected to the said reservoir by a suction conduit, a first conduit which connects the delivery side of the pump to the first of the said chambers, this first chamber forming the fluid intake chamber during the above-mentioned operating phase, a second conduit which connects the second of the said chambers to the reservoir, this second chamber forming the fluid delivery chamber during the said operating phase, a non-return valve which is arranged in the second conduit and only allows passage of the fluid towards the latter chamber, a third conduit which is connected to thE said second conduit on either side of the non-return valve and in which an adjustable flow-limiter is arranged, a fourth conduit which is connected, on the one hand, to the first conduit and, on the other hand, to the flow-regulating organ of the said flow-limiter, characterised in that the adjustable flow-limiter itself consists of: an adjusted discharge-valve, which acts to maintain the pressure of the fluid which can be contained in the portion of the third conduit which is connected to the said discharge-valve and is arranged directly downstream of this valve relative to the reservoir, substantially equal to a given value, and a valve with adjustable opening, which is arranged between the drive organ and the discharge-valve and is distinct from this discharge-valve, and the function of which is to regulate the value of the pressure of the fluid which can be delivered out of the second chamber during the above-mentioned operating phase, while this valve with adjustable opening has an organ for adjusting its opening, which is in equilibrium under the antagonistic influences, on the one hand, of the pressure of the fluid contained in the fourth conduit and, on the other hand, of the fluid pressure which is substantially equal to the given value.
Claim 3
Dependent Claim
149 words
Supply apparatus in accordance with claim 1, characterised in that in addition the valve with adjustable opening is provided with a shock-absorber for its opening motion, in that the said shock-absorber consists of a piston, which is linked to the organ for adjusting the opening of the said valve with adjustable opening, being mounted slidably in the body of the said valve, and which defines with the said body, on the one hand, a first volume, which is freely in communication with the portion of the third conduit connected to the discharge-valve, and, on the other hand, a second volume, in that the non-return valve allows passage of the fluid from the first volume towards the second volume, while a calibrated channel, forming a restriction, connects the said two volumes, and in that a retaining organ tends to keep the said piston and the said adjustment organ linked together.
Claim 4
Dependent Claim
86 words
Supply apparatus in accordance with claim 1, characterised in that the organ for adjusting the opening of the valve with adjustable opening consists of a slide mounted slidably in the body of the said valve, in that the said slide has a shoulder, the adjacent lateral wall of which can overlap the edge of a throat formed in the said valve-body, and in that one of the elements, lateral wall of the shoulder or edge of the throat, is provided with grooves of progressively variable sections.
Claim 5
Dependent Claim
56 words
Supply apparatus in accordance with claim 1, characterised in that in addition an elastic return organ is inserted between the organ for adjusting the opening of the valve with adjustable opening and the body of the said valve and has an influence antagonistic to that of the pressure of the fluid contained in the fourth conduit.
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) | 1977-06-17 | 1977-12-17 | 1978-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-17 | 1981-12-17 | 1982-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-17 | 1985-12-17 | 1986-06-18 | $7700.00 | Window Closed / Lapsed |