US3554527A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shock absorber
Assignee: Boeing North American Inc
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Filing: 1968-06-26
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Granted: 1971-01-12
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Expires: 1988-06-26
Abstract
Abstract An improved shock absorber having a chamber wall that defines a chamber volume in fluid communication with a working fluid through a plurality of apertures in the chamber wall which control the expulsion rate of the fluid from the chamber volume when the chamber wall is deformed.
Inventors
- 👤 Lester G Hall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:30
CPC Classifications
F; F16; F16F; F16F9/00; F16F9/02; F16F9/04; F16F9/0472; F16F9/0481; F16F9/10; F16F2230/00; F16F2230/10
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
156 words
A shock absorber in fluid communication with a working fluid, the shock absorber comprising: chamber means having at least a first wall generally defining a first chamber volume; aperture means in said wall placing said first chamber volume in fluid communication with the working fluid, said aperture means controlling the expulsion of the fluid from said first chamber volume when said first wall is deformed thereby defining a second chamber volume so that a shock-absorbing or damping effect is developed by the expulsion of fluid from said first chamber volume; said chamber means includes: a first chamber means having said first wall, and a second chamber means having a second wall generally defining a third chamber volume within said first chamber volume, and said aperture means includes: a first aperture means in said first wall a second aperture means in said second wall placing said third chamber volume in fluid communication with said first chamber volume.
Claim 2
Dependent Claim
156 words
A shock absorber in fluid communication with a working fluid, the shock absorber comprising: chamber means having at least a first wall generally defining a first chamber volume; aperture means in said wall placing said first chamber volume in fluid communication with the working fluid, said aperture means controlling the expulsion of the fluid from said first chamber volume when said first wall is deformed thereby defining a second chamber volume so that a shock-absorbing or damping effect is developed by the expulsion of fluid from said first chamber volume; said chamber means includes: a first chamber means having said first wall, and a second chamber means having a second wall generally defining a third chamber volume within said first chamber volume, and said aperture means includes: a first aperture means in said first wall a second aperture means in said second wall placing said third chamber volume in fluid communication with said first chamber volume.
Claim 3
Dependent Claim
27 words
The shock absorber of claim 1 in which the total area of said first aperture means is different from the total area of said second aperture means.
Claim 4
Dependent Claim
27 words
The shock absorber of claim 1 in which the total area of said first aperture means is equal to the total area of said second aperture means.
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) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |