Patent US3865045A successfully refreshed from Google Patents.
US3865045A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Railway vehicle truck with device for damping oscillations about swivel axis
Assignee: GSI ENGINEERING Inc A CORP OF
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Filing: 1974-04-25
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Granted: 1975-02-11
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Expires: 1994-04-25
Abstract
Abstract Means for supplementing the resistance of railway truck friction central bearings to objectionable oscillation of the trucks about their swivel axes under light load conditions comprise a snubber connected to the car underframe and mounted for operative engagement with a truck part when the car is unloaded and for disengagement therefrom when the car is loaded.
Inventors
- 👤 Jr William Clifford Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:08
CPC Classifications
B; B61; B61F; B61F5/00; B61F5/02; B61F5/04; B61F5/12; B61F5/122; B61F5/16; B61F5/20
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
143 words
In a railway vehicle, a swivel truck comprising wheeled axles spring supporting structure carried by said axles, springs supported on said spring supporting structure, spring supported structure carried on said springs, said spring supported structure having an upwardly facing friction central bearing part, vehicle body structure having a downwardly facing swivel central bearing part in mating pivotal load supporting engagement with said spring supported structure part, a snubbing device extending tangentially with respect to the truck swivel axis and having relatively movable ends, one of its ends being attached to said body structure and its other end portion being engaged with said spring supported structure when said body structure is loaded below a predetermined value, and means on said spring supporting structure engageable with said snubbing device for disengaging the latter from said spring supported structure when said load exceeds said predetermined value.
Claim 2
Dependent Claim
143 words
In a railway vehicle, a swivel truck comprising wheeled axles spring supporting structure carried by said axles, springs supported on said spring supporting structure, spring supported structure carried on said springs, said spring supported structure having an upwardly facing friction central bearing part, vehicle body structure having a downwardly facing swivel central bearing part in mating pivotal load supporting engagement with said spring supported structure part, a snubbing device extending tangentially with respect to the truck swivel axis and having relatively movable ends, one of its ends being attached to said body structure and its other end portion being engaged with said spring supported structure when said body structure is loaded below a predetermined value, and means on said spring supporting structure engageable with said snubbing device for disengaging the latter from said spring supported structure when said load exceeds said predetermined value.
Claim 3
Dependent Claim
42 words
In a railway vehicle according to claim 1, said snubbing device other end portion being formed with an upward offset and said spring supported structure having an upstanding abutment received within said offset only when said load is below a predetermined value.
Claim 4
Dependent Claim
63 words
In a railway vehicle according to claim 2, said disengaging means comprising an element on said spring supporting structure in underlying relation with said snubbing device other end portion and positioned to uphold the latter clear of said abutment when said body and said spring supported structure are lowered through compression of said springs by a load in excess of said predetermined value.
Claim 5
Dependent Claim
45 words
In a railway vehicle according to claim 3, said disengaging element comprising a roller journaled on said spring supporting element whereby to freely accommodate movements of said snubbing device end portion tangential with respect to the truck swivel axis during swivel movements of the truck.
Claim 6
Dependent Claim
23 words
In a railway vehicle according to claim 1, a pair of said snubbing devices disposed symmetrically with respect to the truck swivel axis.
Claim 7
Dependent Claim
23 words
In a Railway vehicle according to claim 1, said spring supporting structure comprising frame means, said spring supported structure comprising a transverse bolster.
Claim 8
Dependent Claim
18 words
In a railway vehicle truck according to claim 6, said frame means comprising separate longitudinally extending side frames.
Claim 9
Dependent Claim
41 words
In a railway vehicle truck according to claim 7, said snubbing device other end portion being formed with an upward offset and said bolster having an upstanding abutment received within said offset only when said load is below a predetermined value.
Claim 10
Dependent Claim
63 words
In a railway vehicle truck according to claim 8, said disengaging means comprising an element on one of said side frames in underlying relation with said snubbing device other end portion and positioned to uphold the latter clear of said abutment when said body and said bolster are lowered through compression of said springs by a load in excess of said predetermined value.
Claim 11
Dependent Claim
45 words
In a railway vehicle according to claim 9, said disengaging element comprising a roller journaled on said one side frame whereby to freely accommodate movements of said snubbing device end portion tangential with respect to the truck swivel axis during swivel movements of the truck.
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) | 1978-02-10 | 1978-08-12 | 1979-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-10 | 1982-08-12 | 1983-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-10 | 1986-08-12 | 1987-02-11 | $7700.00 | Window Closed / Lapsed |