Patent US4049251A successfully refreshed from Google Patents.
US4049251A
Expired / Lapsed
US
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Shock absorbing strut assembly
Assignee: Yamaha Motor Co Ltd
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Filing: 1975-12-11
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Granted: 1977-09-20
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Expires: 1995-12-11
Abstract
Abstract Shock absorbing strut assembly comprising a telescopically extensible strut having therein an oil chamber of variable volume, a pressure accumulator comprising a spherical housing and a partition member provided in the housing and dividing the interior of the housing into two chambers, each of the chamber being divided by a flexible diaphragm into an oil compartment connected with said oil chamber and a gas compartment, the gas compartments being charged with gas of different pressures.
Inventors
- 👤 Watanabe Masae
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:28
CPC Classifications
F; F16; F16F; F16F9/00; F16F9/06; F16F9/08; F16F9/096; B; B60; B60G; B60G15/00; B60G15/08; B60G15/12; B60G17/00; B60G17/02; B60G17/04; B60G17/0416; B60G17/0432; B62; B62K; B62K25/00; B62K25/04; B62K25/06; B60G2206/00; B60G2206/01; B60G2206/40; B60G2206/42; B60G2206/422; B60G2206/4222
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
164 words
Shock absorbing oleo assembly which comprises telescopically extensible strut means defining therein oil chamber means of variable volume, pressure accumulator means, said accumulator means comprising a housing, said housing having a pair of oil compartments therein, each of said compartments being separated by a partition and each of said compartments being in communication without any restriction with said oil chamber means in the strut means, at least two separated gas compartments in said housing, a pair of pressure responsive wall means in said housing which separate the gas compartments from said oil compartments, and each of which is exposed to its respective oil compartment, said gas compartments being respectively charged at different gas pressures, means for holding the pressure responsive means in the gas compartment of higher pressure against movement when oil pressure in the oil chamber means is below a predetermined value so that the gas pressure in the gas compartment of the higher pressure does not have influence on the oil pressure.
Claim 2
Dependent Claim
164 words
Shock absorbing oleo assembly which comprises telescopically extensible strut means defining therein oil chamber means of variable volume, pressure accumulator means, said accumulator means comprising a housing, said housing having a pair of oil compartments therein, each of said compartments being separated by a partition and each of said compartments being in communication without any restriction with said oil chamber means in the strut means, at least two separated gas compartments in said housing, a pair of pressure responsive wall means in said housing which separate the gas compartments from said oil compartments, and each of which is exposed to its respective oil compartment, said gas compartments being respectively charged at different gas pressures, means for holding the pressure responsive means in the gas compartment of higher pressure against movement when oil pressure in the oil chamber means is below a predetermined value so that the gas pressure in the gas compartment of the higher pressure does not have influence on the oil pressure.
Claim 3
Dependent Claim
18 words
Shock absorbing oleo strut assembly in accordance with claim 1 in which said gas compartments have different volumes.
Claim 4
Dependent Claim
31 words
Shock absorbing oleo strut assembly in accordance with claim 1 in which the gas compartment of higher pressure has greater molar quantity of gas than the gas compartment of lower pressure.
Claim 5
Dependent Claim
26 words
Shock absorbing oleo strut assembly in accordance with claim 1 in which the pressure responsive displaceable wall means in each gas compartment is a flexible diaphragm.
Claim 6
Dependent Claim
36 words
Shock absorbing oleo strut assembly in accordance with claim 1 in which said pressure accumulator housing is spherical and provided outside the strut means and having therein said pair of oil compartments and said gas compartments.
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) | 1980-09-19 | 1981-03-21 | 1981-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-19 | 1985-03-21 | 1985-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-19 | 1989-03-21 | 1989-09-20 | $7700.00 | Window Closed / Lapsed |