Patent US3584858A successfully refreshed from Google Patents.
US3584858A
Expired / Lapsed
US
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Compression spring
Assignee: Lord Corp
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Filing: 1969-04-25
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Granted: 1971-06-15
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Expires: 1989-04-25
Abstract
Abstract A compression spring arrangement comprising a column of elastomer in compression load-carrying relation between supporting and supported members. The column has a relation between length and cross section which prevents buckling under compression load and the supporting and supported members have load-carrying surfaces in opposed relation to each other projecting radially outside the associated end of the column with at least one of the members being bonded to the associated end of the column. The ends of the column diverge outward from the loadcarrying surfaces at an acute angle to define a central section between the ends of substantially greater cross-sectional area than the cross-sectional area of the ends in contact with said members at no load. Under compression load, the elastomer bulges or rolls outward into load contact with the load-carrying surfaces outside the bond and increases the load-carrying area of the column presented to the associated load-carrying surfaces. The mounting is characterized by greater load-carrying ability and by a longer life than the same volume of elastomer in a column of the same height but of uniform cross-sectional area through.
Inventors
- 👤 Merrill G Beck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:59
CPC Classifications
F; F16; F16F; F16F1/00; F16F1/36; F16F1/371; F16F1/3713; F16F1/40; F16F2236/00; F16F2236/04
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
150 words
A compression spring arrangement comprising a column of elastomer in compression load-carrying relation, said column having ends of reduced cross-sectional area and having a relation between length and cross section which ill prevent buckling under compression load applied between its ends, supporting and supported members at opposite ends of the column and having loadcarrying surfaces in opposed relation to each other and bonded to and each projecting radially outside the associated end of the column, the surface of the column adjacent each end diverging outward from the adjacent load-carrying surface at an acute angle so that said elastomer under compression load bulges outward and rolls down into load-carrying contact with the adjacent loadcarrying surfaces outside the outer edge of its bond to the adjacent load-carrying surface and increases the load-carrying area of the column presented to the adjacent load-carrying surface and prevents stress concentration in the elastomer adjacent said bond.
Claim 2
Dependent Claim
150 words
A compression spring arrangement comprising a column of elastomer in compression load-carrying relation, said column having ends of reduced cross-sectional area and having a relation between length and cross section which ill prevent buckling under compression load applied between its ends, supporting and supported members at opposite ends of the column and having loadcarrying surfaces in opposed relation to each other and bonded to and each projecting radially outside the associated end of the column, the surface of the column adjacent each end diverging outward from the adjacent load-carrying surface at an acute angle so that said elastomer under compression load bulges outward and rolls down into load-carrying contact with the adjacent loadcarrying surfaces outside the outer edge of its bond to the adjacent load-carrying surface and increases the load-carrying area of the column presented to the adjacent load-carrying surface and prevents stress concentration in the elastomer adjacent said bond.
Claim 3
Dependent Claim
18 words
The spring of claim 1 in which the outer surfaces of the column adjacent one end are convex.
Claim 4
Dependent Claim
25 words
The spring of claim 1 in which the outer surfaces of the column adjacent one end are semispherical and tangent to the associated load-carrying surface.
Claim 5
Dependent Claim
18 words
The spring of claim 1 in which the outer surfaces of the column adjacent one end are bevelled.
Claim 6
Dependent Claim
21 words
The spring of claim 1 in which the column of elastomer has a center hole extending axially inward from one end.
Claim 7
Dependent Claim
31 words
The spring of claim 1 in which the area of one end of the column is not greater than substantially half the maximum cross section of the column between the ends.
Claim 8
Dependent Claim
20 words
The spring of claim 1 in which the height of the column is not substantially greater than its maximum diameter.
Claim 9
Dependent Claim
21 words
The spring of claim 1 in which the column has an external groove extending axially between the ends of the column.
Claim 10
Dependent Claim
20 words
The spring of claim 8 in which the depth of the groove is greater between the ends of the groove.
Claim 11
Dependent Claim
33 words
The spring of claim 1 in which at least one of the load-carrying surfaces comprises a metal part coextensive with the bond to the column and a separate part radially outside the bond
Claim 12
Dependent Claim
49 words
The spring of claim 1 in which surrounding the bond between the load-carrying surface of one of said members and the associated end of the column there is an adjoining skin of elastomer of wedge shape cross section extending radially outside said bond and bonded to said load-carrying surface.
Claim 13
Dependent Claim
30 words
The spring of claim 10 in which said metal part is recessed into the column so as to have outer surfaces substantially flush with the associated end of the column.
Claim 14
Dependent Claim
27 words
The spring of claim 10 in which the metal part is surrounded by a groove in the elastomer extending axially into the associated end of the column.
References Cited (Backward Citations)
US2571281A
Cited
US2765163A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-14 | 1974-12-14 | 1975-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-14 | 1978-12-14 | 1979-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-14 | 1982-12-14 | 1983-06-15 | $7700.00 | Window Closed / Lapsed |