Patent US3355820A successfully refreshed from Google Patents.
US3773147A
Expired / Lapsed
US
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Truck dampening
Assignee: Individual
•
Filing: 1971-10-28
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Granted: 1973-11-20
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Expires: 1991-10-28
Abstract
Abstract A method of absorbing energy for railway freight cars and more particularly a method of damping the movement of a railway car with respect to the supporting trucks therefor, by the use of fluid snubbers.
Inventors
- 👤 D Wiebe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 03:49
CPC Classifications
B; B61; B61F; B61F5/00; B61F5/02; B61F5/04; B61F5/12; B61F5/127; B61F5/14; B61F5/144; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/4984
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
177 words
The method of damping relative movement between portions of a railway car structure comprising: maintaining a closed hydraulic system having relatively movable spaced portions between components of a railway car structure having repeated relative movement towards and away from each other by supporting one of said spaced portions on one of said components with the other of said spaced portions being moved towards said one spaced portion by the other of said components during movement of said components towards each other; maintaining a chamber between said spaced portions full of hydraulic fluid; restricting flow of hydraulic fluid from said chamber to another portion of said system upon relative movement of said spaced portions during which the pressure of the hydraulic fluid in said chamber increases; and maintaining said chamber full of hydraulic fluid by substantially unrestricted flow of the hydraulic fluid from said another portion of said system during relative movement of said spaced portions away from each other occurring subsequent to each movement of said spaced portions during which the pressure of the hydraulic fluid increased.
Claim 2
Independent Claim
177 words
The method of damping relative movement between portions of a railway car structure comprising: maintaining a closed hydraulic system having relatively movable spaced portions between components of a railway car structure having repeated relative movement towards and away from each other by supporting one of said spaced portions on one of said components with the other of said spaced portions being moved towards said one spaced portion by the other of said components during movement of said components towards each other; maintaining a chamber between said spaced portions full of hydraulic fluid; restricting flow of hydraulic fluid from said chamber to another portion of said system upon relative movement of said spaced portions during which the pressure of the hydraulic fluid in said chamber increases; and maintaining said chamber full of hydraulic fluid by substantially unrestricted flow of the hydraulic fluid from said another portion of said system during relative movement of said spaced portions away from each other occurring subsequent to each movement of said spaced portions during which the pressure of the hydraulic fluid increased.
Claim 3
Dependent Claim
33 words
The method as defined in claim 1 wherein said restricting flow is initiated after the hydraulic fluid in said chamber is at a given pressure and continues thereafter at substantially said given pressure.
Claim 4
Dependent Claim
37 words
The method as defined in claim 1 additionally including dissipating at least a major portion of the heat generated during said restricted flow through at least a portion of a car body portion of said car structure.
Claim 5
Dependent Claim
22 words
A method as defined in claim 1 including maintaining continuous engagement of said other spaced portion with said other of said components.
Claim 6
Dependent Claim
31 words
The method as defined in claim 1 including maintaining a space between said other spaced portions and said other of said components when said components are in a normal relative position.
Claim 7
Dependent Claim
30 words
The method as defined in claim 1 wherein said restricting is of the flow of hydraulic fluid from said chamber to a hydraulic fluid reservoir maintained transversely of said chamber.
Claim 8
Independent Claim
126 words
The method of damping relative movement between portions of a railway car structure comprising: maintaining a closed hydraulic energy absorbing system having relatively movable spaced portions between components of a railway car structure having repeated relative movement towards and away from each other by supporting one of said spaced portions on one of said components with the other of said spaced portions being moved towards said one spaced portion by the other of said components during movement of said components towards each other; absorbing energy created by said components movement by said system, during said absorbing heat energy is generated by said system; and dissipating at least a major portion of said heat energy generated through a path including a car body of said car structure.
Claim 9
Independent Claim
126 words
The method of damping relative movement between portions of a railway car structure comprising: maintaining a closed hydraulic energy absorbing system having relatively movable spaced portions between components of a railway car structure having repeated relative movement towards and away from each other by supporting one of said spaced portions on one of said components with the other of said spaced portions being moved towards said one spaced portion by the other of said components during movement of said components towards each other; absorbing energy created by said components movement by said system, during said absorbing heat energy is generated by said system; and dissipating at least a major portion of said heat energy generated through a path including a car body of said car structure.
Claim 10
Independent Claim
204 words
The method of damping relative movement between a railway car body and the supporting wheeled trucks therefor comprising, maintaining a closed hydraulic system between structural parts of a railway car body and the supporting trucks therefor having cyclic relative movement towards and away from each other by supporting one of relatively movable spaced portions of said system on one of said structural parts with the other of said spaced portions being engaged by the other of said structural parts during movement of said structural parts towards each other, maintaining a chamber between said spaced portions full of hydraulic fluid, restricting flow of hydraulic fluid from said chamber to a remaining part of said system maintained transversely of said chamber upon movement of said structural parts towards each other while said other spaced portion is engaged by said other part of said structural parts and said spaced portions are moved to compress the hydraulic fluid therein at a rate to retard further movement of said structural parts towards each other, and said maintaining of said chamber full of hydraulic fluid being by substantially unrestricted flow of hydraulic fluid from said remaining part of said system during movement of said spaced portions away from each other.
Claim 11
Independent Claim
204 words
The method of damping relative movement between a railway car body and the supporting wheeled trucks therefor comprising, maintaining a closed hydraulic system between structural parts of a railway car body and the supporting trucks therefor having cyclic relative movement towards and away from each other by supporting one of relatively movable spaced portions of said system on one of said structural parts with the other of said spaced portions being engaged by the other of said structural parts during movement of said structural parts towards each other, maintaining a chamber between said spaced portions full of hydraulic fluid, restricting flow of hydraulic fluid from said chamber to a remaining part of said system maintained transversely of said chamber upon movement of said structural parts towards each other while said other spaced portion is engaged by said other part of said structural parts and said spaced portions are moved to compress the hydraulic fluid therein at a rate to retard further movement of said structural parts towards each other, and said maintaining of said chamber full of hydraulic fluid being by substantially unrestricted flow of hydraulic fluid from said remaining part of said system during movement of said spaced portions away from each other.
Claim 12
Dependent Claim
43 words
The method as defined in claim 8 including dissipating into said car body at least a major portion of the heat generated during the period of said restricted flow of said hydraulic fluid to maintain said hydraulic fluid at a desired operating temperature.
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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) | 1976-11-19 | 1977-05-21 | 1977-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-19 | 1981-05-21 | 1981-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-19 | 1985-05-21 | 1985-11-20 | $7700.00 | Window Closed / Lapsed |