US3857413A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure pulse dampener device
Assignee: GREE HYDRAULICS OF CALIFORNIA Inc
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Filing: 1973-10-12
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Granted: 1974-12-31
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Expires: 1993-10-12
Abstract
Abstract The invention relates to a pressure pulse dampener device comprising a pressure vessel having a movable partition therein defining two chambers, each having a port in communication therewith, one of the ports defining a gas port for charging of one of said chambers with gas under pressure and the other an oil port, said oil port having a hollow fitting rigidly secured thereto, said fitting having an inlet port and an outlet port, the fitting having means therein defining a tortuous path for oil under pressure from said inlet port to said outlet port, the oil port being in communication with the tortuous path and means are provided in the fitting to afford a direct path for flow of oil from said inlet port to the outlet port of a portion of the oil under pressure entering the inlet port and for varying the cross sectional area of a portion of said path to restrict the flow of such oil.
Inventors
- 👤 A Zahid
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:58
CPC Classifications
F; F15; F15B; F15B1/00; F15B1/02; F15B1/04; F15B1/08; F15B1/22; F16; F16L; F16L55/00; F16L55/04; F16L55/045; F16L55/05; F16L55/052; F16L55/053; F15B2201/00; F15B2201/20; F15B2201/205; F15B2201/30; F15B2201/315; F15B2201/3152; F15B2201/40; F15B2201/41; F15B2201/411; F15B2201/413; F15B2201/415; F15B2201/4155; F15B2201/43; F15B2201/435; Y; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/3115; Y10T137/3118
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
235 words
A pressure pulse dampener comprising a pressure vessel having a movable partition therein defining two chambers each having a port in communication therewith, one of saiD ports defining a gas port for charging of one of said chambers with gas under pressure and the other an oil port, valve means controlled by the movement of said partition to close said oil port, an oil port fitting comprising a hollow member having an opening axially aligned with said oil port and being rigidly secured thereto and in communication therewith, said member having a fixed partition therein defining two chambers, said fixed partition extending longitudinally of said oil port and being substantially axially aligned therewith, each chamber in said hollow member having one end spaced outwardly from said oil port, said member having two spaced openings extending thereinto and in communication respectively with said chambers, said fixed partition having fluid passage means therethrough aligned with said two openings, whereby a first tortuous path is provided for oil under pressure from one of said openings to the other of said openings, said oil port being in communication with said tortuous path, and a second direct path is provided by said fluid passage means from one of said openings to the other of said openings for a portion of the oil under pressure entering said first spaced opening and means to vary the size of said fluid passage means.
Claim 2
Dependent Claim
235 words
A pressure pulse dampener comprising a pressure vessel having a movable partition therein defining two chambers each having a port in communication therewith, one of saiD ports defining a gas port for charging of one of said chambers with gas under pressure and the other an oil port, valve means controlled by the movement of said partition to close said oil port, an oil port fitting comprising a hollow member having an opening axially aligned with said oil port and being rigidly secured thereto and in communication therewith, said member having a fixed partition therein defining two chambers, said fixed partition extending longitudinally of said oil port and being substantially axially aligned therewith, each chamber in said hollow member having one end spaced outwardly from said oil port, said member having two spaced openings extending thereinto and in communication respectively with said chambers, said fixed partition having fluid passage means therethrough aligned with said two openings, whereby a first tortuous path is provided for oil under pressure from one of said openings to the other of said openings, said oil port being in communication with said tortuous path, and a second direct path is provided by said fluid passage means from one of said openings to the other of said openings for a portion of the oil under pressure entering said first spaced opening and means to vary the size of said fluid passage means.
Claim 3
Dependent Claim
42 words
The combination set forth in claim 1 in which the opening axially aligned with said oil port has a peripheral flange defining a valve seat and said valve means comprises a valve member movable against said valve seat to close said opening.
Claim 4
Dependent Claim
140 words
The combination set forth in claim 1 in which said oil port assembly comprises a block having a cylindrical recess therein having a floor at one end and a mouth at its other end, the mouth of said recess being secured to said oil port, said fixed partition rising from the floor of said recess and extending diametrically across the latter, said block having a pair of transversely spaced bores extending at right angles to said partition, said openings being at the outer ends of said bores respectively and defining an inlet and outlet port respectively, said fixed partition being hollow and having a bore extending therethrough at right angles thereto axially aligned with said openings and defining said fluid passage means, and a plate slidable in said partition to vary the effective area of the bore through said partition.
Claim 5
Dependent Claim
89 words
The combination set forth in claim 3 in which said fixed partition has a rectangular cavity therein, said plate is rectangular and has a stem extending from its outer edge axially aligned with the mouth of said recess, said stem has a threaded portion at its end, a nut rotatable on said threaded end, means to retain axial movement of said nut but to permit rotation thereof, whereby upon rotation of said nut, said plate will be moved to vary the effective area of the bore through said partition.
Claim 6
Dependent Claim
124 words
The combination set forth in claim 1 in which said oil port assembly comprises a hollow sleeve having a bore therethrough with an opening at each end defining an inlet and outlet port respectively, said sleeve having a transverse opening between its ends secured to said oil port, said fixed partition rising from the wall of the sleeve remote from said transverse opening, said fixed partition having a bore therethrough extending at right angles thereto and axially aligned with the inlet and outlet ports, said partition having a bore extending axially of said transverse opening, one end of said axial bore extending through the other bore, nd a valve stem movable in said axial bore to vary the effective area of said other bore.
Claim 7
Dependent Claim
54 words
The combination set forth in claim 5 in which said valve stem is externally threaded and the outer end of said axial bore in said partition is correspondingly threaded, whereby upon rotation of said stem the inner end thereof will move axially in said bore to vary the effective area of said other bore.
References Cited (Backward Citations)
US3169551A
Cited
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 |