US3595350A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Snubber device and bearing structure therefore
Assignee: A Stucki Co
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Filing: 1969-08-22
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Granted: 1971-07-27
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Expires: 1989-08-22
Abstract
Abstract A hydraulic snubber device for railroad car trucks to be interposed between a bolster end and side frame member. This device provides for mounting in compression only between center seeking concave-convex pairs of mating bearing portions to prevent edge contacts with high unit bearing stresses as found in prior art flat bearing surfaces.
Inventors
- 👤 Donald Wiebe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 02:51
CPC Classifications
B; B61; B61F; B61F5/00; B61F5/02; B61F5/04; B61F5/12; B61F5/127
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
131 words
A snubber device in which a pair of elongated members are telescopically movable along a longitudinal axis thereof with a pair of end portions thereof respectively engageable with a mating pair of opposed portions of separate members cyclically movable with respect to each other to cause simultaneous movement of said elongated members along and transversely of said axis, the improvement comprising; one pair of said portions having convex surfaces, the other pair of said portions having concave surfaces engageable by said convex surfaces, respectively, and each said concave surface having a radius of curvature greater than the radius of curvature of the mating one of said convex surfaces with the ratio of said radii being in the range of ratios from 1.2 to 1.7 to provide a center seeking snubbing device.
Claim 2
Dependent Claim
131 words
A snubber device in which a pair of elongated members are telescopically movable along a longitudinal axis thereof with a pair of end portions thereof respectively engageable with a mating pair of opposed portions of separate members cyclically movable with respect to each other to cause simultaneous movement of said elongated members along and transversely of said axis, the improvement comprising; one pair of said portions having convex surfaces, the other pair of said portions having concave surfaces engageable by said convex surfaces, respectively, and each said concave surface having a radius of curvature greater than the radius of curvature of the mating one of said convex surfaces with the ratio of said radii being in the range of ratios from 1.2 to 1.7 to provide a center seeking snubbing device.
Claim 3
Dependent Claim
20 words
A snubbing device as set forth in claim 1 wherein said one pair of said portions are said end portions.
Claim 4
Dependent Claim
23 words
A snubbing device as set forth in claim 1 wherein said one pair of said portions are said mating pair of opposed portions.
Claim 5
Dependent Claim
32 words
A snubbing device as set forth in claim 1 wherein the outermost portion of said convex surfaces is contained in a plane extending in the direction of and containing said longitudinal axis.
Claim 6
Dependent Claim
39 words
A snubbing device as specified in claim 4 wherein at least when said longitudinal axis is perpendicular with respect to the innermost portion of said concave surface, said innermost portion of said concave surface is contained in said plane.
Claim 7
Dependent Claim
32 words
A snubbing device as set forth in claim 1 wherein the innermost portion of said concave surfaces is contained in a plane extending in the direction of and containing said longitudinal axis.
Claim 8
Dependent Claim
39 words
A snubbing device as specified in claim 6 wherein, at least when said longitudinal axis is perpendicular with respect to the innermost portion of said convex surface, said innermost portion of said convex surface is contained in said plane.
Claim 9
Dependent Claim
44 words
A snubber device as set forth in claim 1 in which said convex surfaces have another radius of curvature determining an arc which extends in a direction generally transverse to the arc determined by said first mentioned radius of curvature of said convex surfaces.
Claim 10
Dependent Claim
76 words
A snubber device as set forth in claim 8 in which said concave surfaces have another radius of curvature which extends in a direction generally transverse to the arc determined by said first mentioned radius of curvature of said concave surfaces and said another radius of curvature of said concave surfaces is greater than said another radius of curvature of said convex surfaces with the ratio of said latter mentioned radii being from 1.1 to 1.3.
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) | 1974-07-26 | 1975-01-25 | 1975-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-26 | 1979-01-25 | 1979-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-26 | 1983-01-25 | 1983-07-27 | $7700.00 | Window Closed / Lapsed |