US3722640A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid amplified liquid spring shock absorbers with improved piston heads
Assignee: Tayco Developments Inc
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Filing: 1971-03-26
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Granted: 1973-03-27
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Expires: 1991-03-26
Abstract
Abstract A highly efficient, low cost liquid spring shock absorber capable of fluid amplification and the generation of square energy waves and having a uniquely shaped piston head is provided for use in vehicle bumpers, automotive shock absorption systems and the like.
Inventors
- 👤 Paul H Taylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:57
CPC Classifications
F; F16; F16F; F16F9/00; F16F9/32; F16F9/3207; F16F9/3214; B; B60; B60R; B60R19/00; B60R19/02; B60R19/24; B60R19/26; B60R19/32; F16F5/00; F16F9/36
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
155 words
In a shock absorber having housing means adapted to hold a body of fluid, a piston head slidably disposed within said housing means and a body of compressible fluid within said housing means, the improvement comprising said piston head having a longitudinal axis and a shaped peripheral surface forming a fluid passage between said housing means and said shaped surface and said shaped surface having a centrally disposed flat clearance surface parallel to said housing means, a flow entrance surface on one side of said flat clearance surface sloped in a direction from said flat surface toward said axis, and at least two spaced first and second flow exit surfaces on the opposite side of said flat clearance surface sloped in the direction from said flat surface toward said axis, whereby the flow of fluid passed and shaped peripheral surface causes fluid amplification in said shock absorber and the generation of essentially square energy waves.
Claim 2
Dependent Claim
155 words
In a shock absorber having housing means adapted to hold a body of fluid, a piston head slidably disposed within said housing means and a body of compressible fluid within said housing means, the improvement comprising said piston head having a longitudinal axis and a shaped peripheral surface forming a fluid passage between said housing means and said shaped surface and said shaped surface having a centrally disposed flat clearance surface parallel to said housing means, a flow entrance surface on one side of said flat clearance surface sloped in a direction from said flat surface toward said axis, and at least two spaced first and second flow exit surfaces on the opposite side of said flat clearance surface sloped in the direction from said flat surface toward said axis, whereby the flow of fluid passed and shaped peripheral surface causes fluid amplification in said shock absorber and the generation of essentially square energy waves.
Claim 3
Dependent Claim
200 words
In a shock absorber having housing means adapted to hold a body of fluid, piston head slidably disposed within said housing means and a body of compressible fluid within said housing means, the improvement comprising said piston head having a longitudinal axis and a shaped peripheral surface forming a fluid passage between said housing means and said shaped surface and said shaped surface having a centrally disposed flat clearance surface parallel to said housing means, flow entrance surface on one side of said flat clearance surface sloped in a direction from said flat surface toward said axis, and at least two spaced first and second flow exit surface on the opposite side of said flat clearance surface sloped in the direction from said flat surface toward said axis, said flow entrance surface and said first flow exit surface being oriented at an angle of about 7* to 19* in relation to said flat clearance surface, said second flow exit surface being oriented at an angle of about 45* in relation to said flat clearance surface, whereby the flow of fluid passed said shaped peripheral surface causes fluid amplification in said shock absorber and the generation of essentially square energy waves.
Claim 4
Dependent Claim
200 words
In a shock absorber having housing means adapted to hold a body of fluid, piston head slidably disposed within said housing means and a body of compressible fluid within said housing means, the improvement comprising said piston head having a longitudinal axis and a shaped peripheral surface forming a fluid passage between said housing means and said shaped surface and said shaped surface having a centrally disposed flat clearance surface parallel to said housing means, flow entrance surface on one side of said flat clearance surface sloped in a direction from said flat surface toward said axis, and at least two spaced first and second flow exit surface on the opposite side of said flat clearance surface sloped in the direction from said flat surface toward said axis, said flow entrance surface and said first flow exit surface being oriented at an angle of about 7* to 19* in relation to said flat clearance surface, said second flow exit surface being oriented at an angle of about 45* in relation to said flat clearance surface, whereby the flow of fluid passed said shaped peripheral surface causes fluid amplification in said shock absorber and the generation of essentially square energy waves.
Claim 5
Dependent Claim
56 words
The shock absorber of claim 2 wherein the respective lengths of said land section, said flow entrance surface and said first flow exit surface are equal and wherein the overall combined lengths of said land section, said inclined flow entrance surface and said first flow exit surface is about two-thirds the diameter of said piston head.
Claim 6
Dependent Claim
26 words
The shock absorber of claim 2 wherein at least one flat land area parallel to said housing means is cut out of said flow entrance surface.
Claim 7
Dependent Claim
50 words
The shock absorber of claim 2 wherein said piston head is provided with a circumferential groove formed around the land section of said peripheral surface, and a piston ring disposed in said groove and shaped so as to provide a fixed clearance between said piston head and said housing means.
Claim 8
Dependent Claim
23 words
The shock absorber of claim 2 wherein a second piston head is secured to said housing means opposite said slidably disposed piston head.
Claim 9
Dependent Claim
19 words
The shock absorber of claim 6 further characterized by an air chamber provided above said body of compressible fluid.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-03-26 | 1976-09-25 | 1977-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-26 | 1980-09-25 | 1981-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-26 | 1984-09-25 | 1985-03-27 | $7700.00 | Window Closed / Lapsed |