US3575403A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rubber-containing spring means
Assignee: Pneumatiques Caoutchouc Manufacture et Plastiques Kleber Colombes SA
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Filing: 1969-01-03
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Granted: 1971-04-20
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Expires: 1989-01-03
Abstract
Abstract This invention relates to compression springs of the type comprising layers of rubber adhered to metal end and intermediate plates, and according to the invention, at least two spring block elements are spaced horizontally and positioned so that said elements tend to approach each other and to lean on one another when the spring flexes under a compression load, this arrangement progressively increasing the horizontal rigidity in shear as a function of the flexibility in compression.
Inventors
- 👤 Denis M Hamel
- 👤 Joachim Tank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 03:47
CPC Classifications
F; F16; F16F; F16F1/00; F16F1/36; F16F1/40; F16F1/41; B; B61; B61F; B61F5/00; B61F5/26; B61F5/30; B61F5/305; F16F1/42; F16F1/52; F16F1/54; F16F2236/00; F16F2236/12; F16F2236/123
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
101 words
In a rubber compression spring unit of the type comprising elements having layers of rubber bonded to metal end and intermediate plates, whereby said spring unit may work principally in compression to support a load exerting vertical forces and occasionally in shear under horizontal forces the improvement which consists in that said spring unit comprises at least two spring block elements spaced horizontally and positioned so that, when the spring unit is deflected in compression, said elements tend to approach each other and to lean on one another, which increases progressively the horizontal stiffness in shear as the compressive loading increases.
Claim 2
Dependent Claim
101 words
In a rubber compression spring unit of the type comprising elements having layers of rubber bonded to metal end and intermediate plates, whereby said spring unit may work principally in compression to support a load exerting vertical forces and occasionally in shear under horizontal forces the improvement which consists in that said spring unit comprises at least two spring block elements spaced horizontally and positioned so that, when the spring unit is deflected in compression, said elements tend to approach each other and to lean on one another, which increases progressively the horizontal stiffness in shear as the compressive loading increases.
Claim 3
Dependent Claim
32 words
A spring according to claim 1, wherein said two spring elements are inclined towards one another so as to approach and lean on one another when said spring unit flexes under compression.
Claim 4
Dependent Claim
26 words
A spring according to claim 1, wherein said spring elements are inclined in a convergent-divergent manner from one end of said spring unit to the other.
Claim 5
Dependent Claim
39 words
A spring unit according to claim 1, wherein the space between said two elements is filled by an elastic material which resists the approach of said elements and ensures a more progressive increase of the rigidity in horizontal shear.
Claim 6
Dependent Claim
63 words
A spring unit according to claim 4, wherein said space between said two elements is only partially filled by an elastically deformable material so that up to a certain load, higher than the minimum load, this material may distort whilst resisting the approach of said two elements without offering an appreciable additional resistance to the vertical flexibility in compression of the spring unit.
Claim 7
Dependent Claim
34 words
A spring unit according to claim 5, wherein said elastic material occupies a space corresponding to that left between said elements when said spring unit is flexed in compression with the maximum available load.
Claim 8
Dependent Claim
52 words
A spring unit according to claim 4, which comprises two spring elements whose opposing lateral faces are convergent-divergent from one end to the other of said spring unit and said elastic material occupies the median part of said space, between the said lateral faces by leaving spaces adjacent to said end plates.
Claim 9
Dependent Claim
54 words
A spring unit according to claim 7, wherein said two elements are placed on both sides of an intermediate vertical plan and are spaced laterally by a distance greater than the distance moved during approach of said elements when said spring unit is flexed in compression, said space being occupied by said elastic material.
Claim 10
Dependent Claim
32 words
A spring unit according to claim 1, wherein an intermediate support member is located between said spring elements, said intermediate support members being urged together when said spring unit flexes in compression.
Claim 11
Dependent Claim
37 words
A spring unit according to claim 1, wherein said elements are fixed to said end plates following inclined surfaces so that when the spring unit flexes under a compression load, said elements tend to approach one another.
Claim 12
Dependent Claim
22 words
A spring unit according to claim 10, wherein the ends of said elements are fixed to corners secured to said end plates.
Claim 13
Dependent Claim
38 words
A spring unit according to claim 11, wherein said elements comprise between their ends, intermediate support members in the shape of a corner with surfaces inclined parallel to the inclined surfaces of said end corners which oppose them.
Claim 14
Dependent Claim
28 words
A spring unit according to claim 12, wherein, at rest, said two elements are inclined in a convergent-divergent manner from one end of the spring to the other.
Claim 15
Dependent Claim
29 words
A spring unit according to claim 11, wherein said intermediate plates of said elements are parallel to the inclined faces corresponding to the end corners and the intermediate corners.
Claim 16
Dependent Claim
28 words
A spring unit according to claim 13, wherein said intermediate plates of said elements are themselves inclined with respect to the faces of the end and intermediate corners.
References Cited (Backward Citations)
US3134585A
Cited
US3424448A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-04-19 | 1974-10-19 | 1975-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-19 | 1978-10-19 | 1979-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-19 | 1982-10-19 | 1983-04-20 | $7700.00 | Window Closed / Lapsed |