Patent US3868912A successfully refreshed from Google Patents.
US3868912A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulically snubbed truck
Assignee: A Stucki Co
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Filing: 1973-04-27
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Granted: 1975-03-04
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Expires: 1993-04-27
Abstract
Abstract A hydraulic snubber device for railroad car trucks and more particularly a hydraulic snubber of an improved configuration which is disposed intermediate a bolster and side frame and which includes a circumferential reservoir outside the piston stroke area thereby permitting a minimum height snubber for a given useful stroke.
Inventors
- 👤 John H Wagner
- 👤 Donald Wiebe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:12
CPC Classifications
F; F16; F16F; F16F13/00; B; B60; B60G; B60G15/00; B60G15/02; B60G15/06; B60G15/062; B61; B61F; B61F5/00; B61F5/02; B61F5/04; B61F5/12; B61F5/127
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
122 words
A snubber device comprising: a hollow housing; an annular cylindrical member releasably and rigidly received within said housing; a circumferential fluid reservoir defined by the inner periphery of said housing and substantially the entire outer periphery of an upstanding portion of said cylindrical member which is spaced therefrom; a piston assembly axially reciprocable within said cylindrical member; passageway means communicating between said reservoir and the interior of said cylindrical member adjacent the uppermost portion of said cylindrical member; said interior of said cylindrical member, said passageway means and said reservoir defining a closed hydraulic system for retaining a hydraulic fluid therein; and said passageway means being in communication with said reservoir below the operating level of the hydraulic fluid in said reservoir.
Claim 2
Dependent Claim
122 words
A snubber device comprising: a hollow housing; an annular cylindrical member releasably and rigidly received within said housing; a circumferential fluid reservoir defined by the inner periphery of said housing and substantially the entire outer periphery of an upstanding portion of said cylindrical member which is spaced therefrom; a piston assembly axially reciprocable within said cylindrical member; passageway means communicating between said reservoir and the interior of said cylindrical member adjacent the uppermost portion of said cylindrical member; said interior of said cylindrical member, said passageway means and said reservoir defining a closed hydraulic system for retaining a hydraulic fluid therein; and said passageway means being in communication with said reservoir below the operating level of the hydraulic fluid in said reservoir.
Claim 3
Dependent Claim
20 words
A snubber device as specified in claim 1 wherein said passageway means is formed within the wall of said housing.
Claim 4
Dependent Claim
29 words
A snubber device as specified in claim 2 wherein a portion of said passageway means comprises a radially inwardly and vertically extending groove within the wall of said housing.
Claim 5
Dependent Claim
23 words
A snubber device as specified in claim 3 wherein a portion of the outer periphery of said cylindrical member is adjacent said groove.
Claim 6
Dependent Claim
29 words
A snubber device as specified in claim 1 including means disposed within said housing intermediate the lower end thereof and said piston assembly which biases said piston assembly upwardly.
Claim 7
Dependent Claim
22 words
A snubber device as specified in claim 1 wherein the lower end of said housing sealingly receives a housing closure member therein.
Claim 8
Dependent Claim
36 words
A snubber device as specified in claim 6 wherein said closure member includes an upwardly open annular seating groove therein, said seating groove being adapted to seat the lower end portion of said cylindrical member therein.
Claim 9
Dependent Claim
24 words
A snubber device as specified in claim 1 wherein said housing closure member is solely frictionally retained within the lower end of said housing.
Claim 10
Dependent Claim
65 words
A snubber device as specified in claim 1 wherein said piston assembly comprises a piston head and a piston rod and said housing includes an inner peripheral seal adjacent the upper end thereof, and said peripheral seal maintains the hydraulic fluid within said housing by maintaining a seal between said housing and said piston rod which is reciprocal through the upper end of said housing.
Claim 11
Dependent Claim
51 words
A snubber device as specified in claim 1 which is adapted to be interposed in a spring group intermediate a bolster member and a side frame member and said housing includes a peripheral portion concaved inwardly to provide clearance for the springs of such a spring group which are adjacent thereto.
Claim 12
Dependent Claim
88 words
In a railway truck assembly in which a fluid snubber assembly having a pair of elongated sections telescopically movable with respect to each other along a longitudinal axis thereof is interposed in the spring group intermediate a bolster member and a side frame member, the improvement comprising: said snubber assembly including a radially outwardly and circumferentially extending fluid reservoir; and said reservoir including at least one peripheral portion which is concaved radially inwardly to provide clearance for the springs of said spring group which are transversely adjacent thereto.
Claim 13
Dependent Claim
88 words
In a railway truck assembly in which a fluid snubber assembly having a pair of elongated sections telescopically movable with respect to each other along a longitudinal axis thereof is interposed in the spring group intermediate a bolster member and a side frame member, the improvement comprising: said snubber assembly including a radially outwardly and circumferentially extending fluid reservoir; and said reservoir including at least one peripheral portion which is concaved radially inwardly to provide clearance for the springs of said spring group which are transversely adjacent thereto.
Claim 14
Dependent Claim
17 words
A railway truck assembly as specified in claim 11 wherein said reservoir has a generally annular configuration.
Claim 15
Dependent Claim
18 words
A railway truck assembly as specified in claim 12 wherein said snubber assembly is a hydraulic snubber assembly.
Claim 16
Dependent Claim
102 words
In a fluid snubber assembly having a pair of elongated sections telescopically movable with respect to each other along a longitudinal axis thereof and adapted to be interposed in the spring group of a railway truck assembly intermediate a bolster member and a side frame member, the improvement comprising: said snubber assembly including a radially outwardly and circumferentially extending fluid reservoir; and said reservoir including at least one peripheral portion which is concaved radially inwardly to provide clearance for the springs of such a spring group which are transversely adjacent thereto when said snubber assembly is interposed in such a spring group.
Claim 17
Dependent Claim
102 words
In a fluid snubber assembly having a pair of elongated sections telescopically movable with respect to each other along a longitudinal axis thereof and adapted to be interposed in the spring group of a railway truck assembly intermediate a bolster member and a side frame member, the improvement comprising: said snubber assembly including a radially outwardly and circumferentially extending fluid reservoir; and said reservoir including at least one peripheral portion which is concaved radially inwardly to provide clearance for the springs of such a spring group which are transversely adjacent thereto when said snubber assembly is interposed in such a spring group.
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) | 1978-03-03 | 1978-09-02 | 1979-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-03 | 1982-09-02 | 1983-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-03 | 1986-09-02 | 1987-03-04 | $7700.00 | Window Closed / Lapsed |