Patent US4348015A successfully refreshed from Google Patents.
US4348015A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shock absorbers
Assignee: Hutchinson Mapa SA
•
Filing: 1980-05-07
•
Granted: 1982-09-07
•
Expires: 2000-05-07
Abstract
Abstract The shock absorber comprises two stacks, of alternated metallic plates and elastic blocks mutually encircling one another. The blocks of each stack are borne by the plates of the other and are constituted of an elastomer different from that constituting the blocks of the other stack.
Inventors
- 👤 Michel Domer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:58
CPC Classifications
F; F16; F16F; F16F3/00; F16F3/08; F16F3/087; F16F3/093; F16F3/0935; B; B61; B61G; B61G11/00; B61G11/08; F16F1/00; F16F1/36; F16F1/42; F16F1/44; F16F3/0873; F16F3/0876; B60; B60G; B60G2202/00; B60G2202/10; B60G2202/14; B60G2202/143; B60G2204/00; B60G2204/10; B60G2204/12; B60G2204/125; B60G2204/40; B60G2204/45; B60G2204/4504
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
88 words
Shock absorber comprising two concentric adjacent stacks, each stack having a plurality of metallic elements and elastic elements arranged with the metallic elements and elastic elements alternating with each other in each stack, the metallic elements and elastic elements arranged to bear one against the other upon compression of the shock absorber, said elastic elements of each stack being borne by the metallic elements of the other stack and wherein the elastic elements of the two stacks are constituted respectively of elastomers having different deformation and damping characteristics.
Claim 2
Dependent Claim
88 words
Shock absorber comprising two concentric adjacent stacks, each stack having a plurality of metallic elements and elastic elements arranged with the metallic elements and elastic elements alternating with each other in each stack, the metallic elements and elastic elements arranged to bear one against the other upon compression of the shock absorber, said elastic elements of each stack being borne by the metallic elements of the other stack and wherein the elastic elements of the two stacks are constituted respectively of elastomers having different deformation and damping characteristics.
Claim 3
Dependent Claim
34 words
Shock absorber according to claim 1, wherein the elastic elements of one of the stacks have a damping ratio less than 10% and those of the other stacks, a damping ratio greater than 10%.
Claim 4
Dependent Claim
22 words
Shock absorber according to claim 1, wherein the stack comprising elastic elements with the highest damping ratio is outside the other stack.
Claim 5
Dependent Claim
22 words
Shock absorber according to claim 2, wherein the stack comprising elastic elements with the highest damping ratio is outside the other stack.
Claim 6
Dependent Claim
22 words
Shock absorber according to claim 1, wherein a slight axial pre-stress is exerted on the elastic elements with the lowest damping ratio.
Claim 7
Dependent Claim
22 words
Shock absorber according to claim 2, wherein a slight axial pre-stress is exerted on the elastic elements with the lowest damping ratio.
Claim 8
Dependent Claim
39 words
Shock absorber according to claim 1, wherein the surfaces of the elastic elements with the highest damping ratio coming into contact with the metallic elements interposed between them for the relaxed state of the damper, are narrow and convex.
Claim 9
Dependent Claim
37 words
Shock absorber according to claim 2, wherein the elastic elements with the highest damping ratio coming into contact with the metal elements interposed between them for the relaxed state of the shock absorber, are narrow and convex.
Claim 10
Dependent Claim
44 words
Shock absorber according to claim 1, wherein certain elastic elements include an indentation between its outer end and the metallic element on which it is borne, on both sides of said metallic element, so as to operate by buckling when they are compressed axially.
Claim 11
Dependent Claim
44 words
Shock absorber according to claim 2, wherein certain elastic elements include an indentation between its outer end and the metallic element on which it is borne, on both sides of said metallic element, so as to operate by buckling when they are compressed axially.
References Cited (Backward Citations)
US2987291A
Cited
JPS5241775A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-09-06 | 1986-03-08 | 1986-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-09-06 | 1990-03-08 | 1990-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-09-06 | 1994-03-08 | 1994-09-07 | $7700.00 | Window Closed / Lapsed |