US3795201A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Railway car roll dampening friction device
Assignee: Individual
•
Filing: 1973-01-05
•
Granted: 1974-03-05
•
Expires: 1993-01-05
Abstract
Abstract An energy-absorber for swaying motion between the body and sideframe portions of a railroad car has a housing and a fulcrum adapted for mounting on the same portion of the car and has a lever pivoted on the fulcrum and adapted for sliding engagement with the other portion of the car. The housing contains a friction shoe having inclined wedging surfaces at its opposite ends and inner and outer wedge members having inclined surfaces mating with those of the shoe. The drive rod of the energyabsorber is pivoted to the operating lever and has an abutment engaging the outer wedge and has a compression spring around its inner end engaging the inner wedge. A spring of greater capacity in the housing produces friction increasing with the insertion of the rod and the shoe into the housing. Structure for providing maintenance-free operation over long periods of use is described.
Inventors
- 👤 C Tack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:10
CPC Classifications
B; B61; B61F; B61F5/00; B61F5/02; B61F5/04; B61F5/12; B61F5/122; B61F5/22; B61F5/24
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
182 words
A motion-damping device for a railroad car having body and side-frame portions comprising an elongated housing adapted to be attached to one of said portions and having a longitudinally extending internal friction surface, a friction shoe guided for sliding motion along said surface and having inclined wedging surfaces at opposite ends thereof, inner and outer wedge members having inclined surfaces mating with the respective inclined surfaces of the shoe, a drive actuator extending into the housing and having its inner end inward of the inner wedge members, an abutment on the actuator engaging the outer wedge member in the direction to drive it inwardly, a compression spring on the inner end of the actuator urging the inner wedge member outwardly to maintain a minimum friction, and a compression spring of greater capacity seated in the inner end of the housing and also urging the inner wedge member outwardly to produce friction increasing with insertion of the actuator and the shoe into the housing in response to external force and to return the actuator and the shoe outward when external force is withdrawn.
Claim 2
Dependent Claim
182 words
A motion-damping device for a railroad car having body and side-frame portions comprising an elongated housing adapted to be attached to one of said portions and having a longitudinally extending internal friction surface, a friction shoe guided for sliding motion along said surface and having inclined wedging surfaces at opposite ends thereof, inner and outer wedge members having inclined surfaces mating with the respective inclined surfaces of the shoe, a drive actuator extending into the housing and having its inner end inward of the inner wedge members, an abutment on the actuator engaging the outer wedge member in the direction to drive it inwardly, a compression spring on the inner end of the actuator urging the inner wedge member outwardly to maintain a minimum friction, and a compression spring of greater capacity seated in the inner end of the housing and also urging the inner wedge member outwardly to produce friction increasing with insertion of the actuator and the shoe into the housing in response to external force and to return the actuator and the shoe outward when external force is withdrawn.
Claim 3
Dependent Claim
21 words
The motion-damping device of claim 1 having the wedge members of generally square cross-section and having two shoes of L-shape cross-section.
Claim 4
Dependent Claim
51 words
The motion-damping device of claim 2 having additional mating wedging surfaces on the internal corners of the shoes and the diagonally opposite external corners of the wedge members thereby engaged, the wedging surfaces at the corners being initially substantially the sole points of contact between the wedging members and the shoes.
Claim 5
Dependent Claim
23 words
The motion-damping device of claim 1 having the abutment and the portion of the wedge member engaged thereby of mating generally spherical shape.
Claim 6
Dependent Claim
53 words
The motion-damping device of claim 1 having a lever pivotally engaged with the outer end of the actuator and adapted to slidingly engage the other portion of the car and a fulcrum member adapted to be mounted on the same portion of the car as the housing and pivotally engaged with the lever.
Claim 7
Dependent Claim
167 words
A motion-damping device for a railroad car having body and side-frame portions comprising a housing adapted to be mounted on one of said portions, an actuating member extending from the housing, a lever pivotally engaged with the outer end of the actuator and adapted to slidingly engage the other said portion of the car, and a fulcrum member adapted to be mounted on the same portion of the car as the housing and pivotally engaged with the lever, the housing containing friction means opposing insertion of the actuating member and responsive to inward driven motion of the actuating member to increase the friction, spring means to return the actuating member outwardly to follow the separating relative motion of said portions of the car produced by car-spring oscillations, and means to maintain substantial friction opposing said spring means to prevent following by the actuating member of the fast separative and return relative motions of said portions of the car produced by track discontinuities at crossings and the like.
Claim 8
Dependent Claim
167 words
A motion-damping device for a railroad car having body and side-frame portions comprising a housing adapted to be mounted on one of said portions, an actuating member extending from the housing, a lever pivotally engaged with the outer end of the actuator and adapted to slidingly engage the other said portion of the car, and a fulcrum member adapted to be mounted on the same portion of the car as the housing and pivotally engaged with the lever, the housing containing friction means opposing insertion of the actuating member and responsive to inward driven motion of the actuating member to increase the friction, spring means to return the actuating member outwardly to follow the separating relative motion of said portions of the car produced by car-spring oscillations, and means to maintain substantial friction opposing said spring means to prevent following by the actuating member of the fast separative and return relative motions of said portions of the car produced by track discontinuities at crossings and the like.
Claim 9
Dependent Claim
53 words
The motion-damping device of claim 6 having a sliding assembly within the housing having an apertured outer member, the actuator member extending through the outer member and having an abutment portion engaging the portion of the outer member surrounding the aperture, said abutment portion and said surrounding portion being of mating spherical sHape.
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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) | 1977-03-04 | 1977-09-03 | 1978-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-04 | 1981-09-03 | 1982-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-04 | 1985-09-03 | 1986-03-05 | $7700.00 | Window Closed / Lapsed |