Patent US611950A successfully refreshed from Google Patents.
Patent US3580290A successfully refreshed from Google Patents.
US3580290A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Accumulator
Assignee: Individual
•
Filing: 1969-05-27
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Granted: 1971-05-25
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Expires: 1989-05-27
Abstract
Abstract An accumulator comprises a rigid container having a valve seat at its fluid inlet and a bladder therein carrying a valve element that engages the valve seat when the bladder is fully expanded. There is a dashpot connection between the valve element and a fixed spider in the inlet, to guide the valve element and so retard its motion when it is near the valve seat as to encourage radial rather than axial expansion and contraction of the bladder, thus preventing rubbing of the bladder on the container.
Inventors
- 👤 Kazuo Sugimura
- 👤 Nobuyuki Sugimura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:23
CPC Classifications
F; F15; F15B; F15B1/00; F15B1/02; F15B1/04; F15B1/08; F15B1/10; F15B1/18; F15B1/20; F16; F16L; F16L55/00; F16L55/04; F16L55/045; F16L55/05; F16L55/052; F15B2201/00; F15B2201/20; F15B2201/205; F15B2201/30; F15B2201/315; F15B2201/3152; F15B2201/40; F15B2201/415; F15B2201/4155; F15B2201/43
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
276 words
In an accumulator comprising a rigid container having a port at one end thereof through which liquid can flow in and out, a valve seat element on the container surrounding said port, a resilient gas filled bladder in the container, one end of which is secured to the container remotely from the port and which contracts and expands as liquid moves into and out of the container, and a valve element carried by said bladder at its other end for movement toward and from engagement with the valve seat element in consequence of expansion and contraction of the bladder, means for guiding the valve element in its motion toward and from the valve seat element and for retarding motion of the valve element when it is near the valve seat element so as to constrain the bladder to expanding and contracting motion mainly in directions transverse to the axis of the port and thus minimIze rubbing of the bladder against the interior of the container, said means comprising: A. a rod having one of its ends rigidly secured to one of said elements and having its other end formed as a piston, said rod being substantially coaxial to the port; and B. a cylinder rigidly secured to the other of said elements and in which said piston is received with clearance, said cylinder being closed at one end and having at its other end a wall which faces said one element and in which there is a hole through which the rod extends with clearance so that liquid retardingly flows into and out of the cylinder through the clearance spaces around the rod and the piston.
Claim 2
Dependent Claim
276 words
In an accumulator comprising a rigid container having a port at one end thereof through which liquid can flow in and out, a valve seat element on the container surrounding said port, a resilient gas filled bladder in the container, one end of which is secured to the container remotely from the port and which contracts and expands as liquid moves into and out of the container, and a valve element carried by said bladder at its other end for movement toward and from engagement with the valve seat element in consequence of expansion and contraction of the bladder, means for guiding the valve element in its motion toward and from the valve seat element and for retarding motion of the valve element when it is near the valve seat element so as to constrain the bladder to expanding and contracting motion mainly in directions transverse to the axis of the port and thus minimIze rubbing of the bladder against the interior of the container, said means comprising: A. a rod having one of its ends rigidly secured to one of said elements and having its other end formed as a piston, said rod being substantially coaxial to the port; and B. a cylinder rigidly secured to the other of said elements and in which said piston is received with clearance, said cylinder being closed at one end and having at its other end a wall which faces said one element and in which there is a hole through which the rod extends with clearance so that liquid retardingly flows into and out of the cylinder through the clearance spaces around the rod and the piston.
Claim 3
Dependent Claim
60 words
The accumulator of claim 1, further characterized by: said rod having an enlarged diameter portion near its first named end which enters said hole as the valve element nears the seat element to reduce the clearance between the rod and said wall and thus afford additional retardation of valve element motion when the valve element is near the seat element.
Claim 4
Dependent Claim
54 words
The accumulator of claim 1, further characterized by: the bore of said cylinder having a reduced diameter portion at its end nearer said wall, cooperable with the piston when the valve element is near the seat element to afford additional retardation of valve element motion when the valve element is near the seat element.
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) | 1974-05-24 | 1974-11-23 | 1975-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-24 | 1978-11-23 | 1979-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-24 | 1982-11-23 | 1983-05-25 | $7700.00 | Window Closed / Lapsed |