Patent US4540620A successfully refreshed from Google Patents.
Patent US4295492A successfully refreshed from Google Patents.
US4295492A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low cost accumulator device
Assignee: GREE HYDRAULICS OF CALIFORNIA Inc
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Filing: 1979-11-13
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Granted: 1981-10-20
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Expires: 1999-11-13
Abstract
Abstract The present invention is directed to a low cost accumulator device having a pressure vessel formed of two components, namely, a shell and a cap, the seal between the shell and cap being effected in the course of mounting the shell to the cap by compression of a thickened rim portion of the bladder between the shell and cap components, the apparatus being so constructed and arranged that optimum compression of the rim portion is automatically achieved, thereby avoiding under-compression with possible resultant leaks or over-compression with possible damage to the bladder.
Inventors
- 👤 Abduz Zahid
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:36
CPC Classifications
F; F15; F15B; F15B1/00; F15B1/02; F15B1/04; F15B1/08; F15B1/10; F15B1/106; F15B1/12; F15B1/125; F15B2201/00; F15B2201/20; F15B2201/205; F15B2201/30; F15B2201/315; F15B2201/3152; F15B2201/40; F15B2201/41; F15B2201/415; F15B2201/4155; F15B2201/43; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49908; Y10T29/49915; Y10T29/49917; Y10T29/49918
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
233 words
An accumulator device including a pressure vessel having an oil port at one end, and a gas charging port at the other end, and a resilient elastomeric bladder therein and dividing the same into two chambers in communication, respectively, with said oil and said gas ports, said pressure vessel being of a two part construction and comprising a generally cylindrical shell having a closed end carrying said oil port and having an open mouth portion, an upwardly directed annular trough member surrounding said mouth portion, said trough including a floor, a cylindrical skirt surrounding said trough, a circular cap member carrying said gas charging port mounted in said open mouth portion of said shell, said cap member including a downwardly facing surrounding annular trough member having a depending peripheral annular lip, said cylindrical skirt being spun inwardly over the trough defining portions of said cap member whereby said annular lip of said cap is biased into engagement with said floor of said upwardly directed trough member, said trough members together defining an annular chamber having an annular opening directed toward the interior of said vessel, said bladder assembly including a thickened rim portion maintained in compressed condition within said annular chamber and providing a seal between said cap and the open mouth portion of said shell, said bladder having side wall portions extending through said annular opening into the interior of said shell.
Claim 2
Dependent Claim
233 words
An accumulator device including a pressure vessel having an oil port at one end, and a gas charging port at the other end, and a resilient elastomeric bladder therein and dividing the same into two chambers in communication, respectively, with said oil and said gas ports, said pressure vessel being of a two part construction and comprising a generally cylindrical shell having a closed end carrying said oil port and having an open mouth portion, an upwardly directed annular trough member surrounding said mouth portion, said trough including a floor, a cylindrical skirt surrounding said trough, a circular cap member carrying said gas charging port mounted in said open mouth portion of said shell, said cap member including a downwardly facing surrounding annular trough member having a depending peripheral annular lip, said cylindrical skirt being spun inwardly over the trough defining portions of said cap member whereby said annular lip of said cap is biased into engagement with said floor of said upwardly directed trough member, said trough members together defining an annular chamber having an annular opening directed toward the interior of said vessel, said bladder assembly including a thickened rim portion maintained in compressed condition within said annular chamber and providing a seal between said cap and the open mouth portion of said shell, said bladder having side wall portions extending through said annular opening into the interior of said shell.
Claim 3
Dependent Claim
30 words
An accumulator in accordance with claim 1 wherein said cylindrical skirt is disposed in outwardly lapping position of said cap member and retains said lip in engagement with said floor.
Claim 4
Dependent Claim
38 words
An accumulator in accordance with claim 2 wherein said cap member includes a depending peripheral wall portion in intimate engagement with the inner surface portions of said skirt, the lowermost end of said wall portion defining said lip.
Claim 5
Dependent Claim
40 words
An accumulator in accordance with claim 3 wherein portions of said thickened rim immediately inwardly of said annular chamber are biased against portions of said shell adjacent said open mouth portion and proximately spaced wall portions of said cap 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) | 1984-10-19 | 1985-04-20 | 1985-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-19 | 1989-04-20 | 1989-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-19 | 1993-04-20 | 1993-10-20 | $7700.00 | Window Closed / Lapsed |