US3837292A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic truck snubber
Assignee: Individual
•
Filing: 1971-04-15
•
Granted: 1974-09-24
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Expires: 1991-04-15
Abstract
Abstract A hydraulic snubber device for railroad car trucks to be interposed between a bolster end and side frame member. This device being of minimum height for a given useful stroke because ullage volume is provided in a reservoir outside the snubber cylinder.
Inventors
- 👤 D Wiebe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 03:50
CPC Classifications
B; B61; B61F; B61F5/00; B61F5/02; B61F5/04; B61F5/12; B61F5/127
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
140 words
In a dampened railway truck assembly selectively operable in loaded and unloaded conditions and having a hydraulic snubber apparatus interposed in a spring group intermediate a bolster member and a side frame member, the improvement comprising: means interposed between said snubber apparatus and one of said members to bias said snubber apparatus towards the other of said members; said means being operative to bias said snubber apparatus out of operative engagement with said one of said members when said truck assembly is normally operating in an unloaded condition; and said means and said snubber apparatus being cooperable to initiate hydraulic snubbing by said snubber apparatus substantially only when said railway truck assembly is normally operating in a loaded condition, the bias of said means is partially overcome and said snubber apparatus is in operative engagement with both of said members.
Claim 2
Dependent Claim
140 words
In a dampened railway truck assembly selectively operable in loaded and unloaded conditions and having a hydraulic snubber apparatus interposed in a spring group intermediate a bolster member and a side frame member, the improvement comprising: means interposed between said snubber apparatus and one of said members to bias said snubber apparatus towards the other of said members; said means being operative to bias said snubber apparatus out of operative engagement with said one of said members when said truck assembly is normally operating in an unloaded condition; and said means and said snubber apparatus being cooperable to initiate hydraulic snubbing by said snubber apparatus substantially only when said railway truck assembly is normally operating in a loaded condition, the bias of said means is partially overcome and said snubber apparatus is in operative engagement with both of said members.
Claim 3
Dependent Claim
32 words
In a railway truck assembly as specified in claim 1 wherein when said truck assembly is normally operating in an unloaded condition said snubber apparatus engages only said other of said members.
Claim 4
Dependent Claim
34 words
In a railway truck assembly as specified in claim 2 wherein when said truck assembly is normally operating in said loaded condition said snubber assembly is simultaneously in engagement with both of said members.
Claim 5
Dependent Claim
25 words
In a railway truck assembly as specified in claim 1 wherein said means biases said snubber apparatus into engagement with said other of said members.
Claim 6
Dependent Claim
29 words
In a railway truck assembly as specified in claim 1 wherein said snubber apparatus includes means biasing a portion of said snubber apparatus towards said one of said members.
Claim 7
Dependent Claim
25 words
In a railway truck assembly as specified in claim 1 wherein said means and said snubber apparatus replace a normal spring of said spring group.
Claim 8
Dependent Claim
31 words
In a railway truck assembly as specified in claim 1 wherein said one of said members is said bolster member and said other of said members is said side frame member.
Claim 9
Dependent Claim
31 words
In a railway truck assembly as specified in claim 1 wherein said one of said members is said side frame member and said other of said members is said bolster member.
Claim 10
Dependent Claim
26 words
In a railway truck assembly as specified in claim 1 wherein said snubber apparatus is interposed inwardly adjacent an outer peripherial portion of said spring group.
Claim 11
Dependent Claim
146 words
A railway truck snubber assembly comprising: a hydraulic snubber apparatus adapted to be interposed in a spring group intermediate a bolster member and a side frame member of a railway truck assembly; means in communication with said snubber apparatus and adapted to be interposed between said snubber apparatus and one of such members to bias said snubber apparatus towards the other of such members; said means being operative to bias said snubber apparatus out of operative engagement with such one of such members when such truck assembly is normally operating in an unloaded condition; and said means and said snubber apparatus being cooperable to initiate hydraulic snubbing by said snubber apparatus substantially only when such railway truck assembly is normally operating in a loaded condition, the bias of said means is partially overcome and said snubber apparatus is in operative engagement with both of such members.
Claim 12
Dependent Claim
146 words
A railway truck snubber assembly comprising: a hydraulic snubber apparatus adapted to be interposed in a spring group intermediate a bolster member and a side frame member of a railway truck assembly; means in communication with said snubber apparatus and adapted to be interposed between said snubber apparatus and one of such members to bias said snubber apparatus towards the other of such members; said means being operative to bias said snubber apparatus out of operative engagement with such one of such members when such truck assembly is normally operating in an unloaded condition; and said means and said snubber apparatus being cooperable to initiate hydraulic snubbing by said snubber apparatus substantially only when such railway truck assembly is normally operating in a loaded condition, the bias of said means is partially overcome and said snubber apparatus is in operative engagement with both of such members.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-23 | 1978-03-25 | 1978-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-23 | 1982-03-25 | 1982-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-23 | 1986-03-25 | 1986-09-24 | $7700.00 | Window Closed / Lapsed |