US3780837A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Single cylinder truck-mounted brake
Assignee: Westinghouse Air Brake Co
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Filing: 1972-11-13
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Granted: 1973-12-25
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Expires: 1992-11-13
Abstract
Abstract A brake rigging for a two-axle four-wheel railway car truck which embodies a brake cylinder disposed traversely between the side frames of the car truck and operatively connected to two parallel brake beams disposed on the respective opposite sides of a truck bolster through a linkage comprising a pair of spacedapart bell-crank levers pivotally mounted on one of the brake beams, one arm of these bell-crank levers being pivotally connected respectively to the body of the brake cylinder and the exterior end of the piston rod of the brake cylinder piston, and the other arm of these levers being pivotally connected respectively to one end of one of a pair of rods, the other end of each of which is pivotally connected to the other brake beam. The traversely disposed brake cylinder, together with the pair of spaced-apart bell-crank levers, insure that the pair of rods connecting these levers to the other brake beam are so spaced apart one from the other as to be sufficiently disposed beneath the truck bolster adjacent the outer ends thereof as to enable adequate vertical movement of the bolster, as the result of truck spring deflection due to load on the car, without movement of the bolster into contact with these rods which would inhibit or prevent free movement thereof. Therefore, while the car is either empty or fully loaded, whenever fluid under pressure is supplied to the brake cylinder, the two brake beams are moved in opposite directions without hindrance by the bolster to cause the application of brake shoes carried by the brake beams to the tread surface of each wheel of the car truck with the same brakeapplying force.
Inventors
- 👤 A Haydu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 07:46
CPC Classifications
B; B61; B61H; B61H13/00; B61H13/20; B61H13/24
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
364 words
A brake rigging for a four-wheel type of vehicle truck having a transverse axis, a longitudinal axis perpendicular thereto, and a bolster so disposed that its axis coincides with the transverse axis of the truck, said brake rigging including two brake beams extending in spaced substantially parallel relation to the transverse axis of the truck, and guidably supported on the truck for bodily movement longitudinally of the truck, wherein the improvement comprises: a. a pair of spaced-apart fulcrum mounting means formed integral with each of said brake beams, b. a pair of bell-crank levers each having a pair of arms, c. a pair of fulcrum members, each having one of said pair of bell-crank levers rockable thereon and being anchored in one of said pair of fulcrum mounting means on one of said brake beams, d. a brake cylinder casing having its longitudinal axis arranged parallel to the transverse axis of said truck and being pivotally connected to one arm of one of said bell-crank levers, and e. a piston operable in said brake cylinder casing and cooperating therewith to form a pressure chamber to which fluid under pressure may be supplied to respectively exert forces acting in opposite directions on said piston and said casing, said piston having a piston rod movable therewith substantially transversely of the truck and being operable connected to one arm of the other of said bell-crank levers, and f. a pair of links connected respectively at one end to the other arm of said bell-crank levers and at the other end in spaced-apart relation to the other of said brake beams, said links, bell-crank levers, brAke cylinder casing and piston cooperating to transmit the fluid pressure force acting on said casing and said piston to said brake beams whereby said force effects movement of said other brake beam in one direction to a brake applying position with respect to a corresponding pair of wheels of the truck, and thereafter cooperating to transmit said fluid pressure force to said one brake beam to effect movement thereof in a direction opposite said one direction to a brake applying position with respect to the other pair of wheels of the truck.
Claim 2
Dependent Claim
364 words
A brake rigging for a four-wheel type of vehicle truck having a transverse axis, a longitudinal axis perpendicular thereto, and a bolster so disposed that its axis coincides with the transverse axis of the truck, said brake rigging including two brake beams extending in spaced substantially parallel relation to the transverse axis of the truck, and guidably supported on the truck for bodily movement longitudinally of the truck, wherein the improvement comprises: a. a pair of spaced-apart fulcrum mounting means formed integral with each of said brake beams, b. a pair of bell-crank levers each having a pair of arms, c. a pair of fulcrum members, each having one of said pair of bell-crank levers rockable thereon and being anchored in one of said pair of fulcrum mounting means on one of said brake beams, d. a brake cylinder casing having its longitudinal axis arranged parallel to the transverse axis of said truck and being pivotally connected to one arm of one of said bell-crank levers, and e. a piston operable in said brake cylinder casing and cooperating therewith to form a pressure chamber to which fluid under pressure may be supplied to respectively exert forces acting in opposite directions on said piston and said casing, said piston having a piston rod movable therewith substantially transversely of the truck and being operable connected to one arm of the other of said bell-crank levers, and f. a pair of links connected respectively at one end to the other arm of said bell-crank levers and at the other end in spaced-apart relation to the other of said brake beams, said links, bell-crank levers, brAke cylinder casing and piston cooperating to transmit the fluid pressure force acting on said casing and said piston to said brake beams whereby said force effects movement of said other brake beam in one direction to a brake applying position with respect to a corresponding pair of wheels of the truck, and thereafter cooperating to transmit said fluid pressure force to said one brake beam to effect movement thereof in a direction opposite said one direction to a brake applying position with respect to the other pair of wheels of the truck.
Claim 3
Dependent Claim
43 words
A brake rigging for a four-wheel type of vehicle truck, as recited in claim 1, further characterized in that said pair of arms of said pair of bell-crank levers are of equal length to enable transmittal of equal forces through the bell-crank levers.
Claim 4
Dependent Claim
48 words
A brake rigging for a four-wheel type of vehicle truck, as recited in claim 1, further characterized in that one of said pair of arms of each of said bell-crank levers is longer than the other arm to enable a multiplication of force transmitted through the bell-crank levers.
Claim 5
Dependent Claim
130 words
A brake rigging for a four-wheel type of vehicle truck, as recited in claim 1, further characterized in that each of said brake beams comprises a U-shaped channel member having a pair of parallel spaced-apart flanges and a web integrally connecting one edge of one flange with the corresponding edge of the other flange, and in that each of said flanges has formed integral therewith on the side thereof adjacent the other flange a pair of spaced apart bosses, each boss of each pair of oppositely disposed bosses being provided with a bore coaxial with the bore in the other boss of the respective pair of oppositely disposed bosses, each pair of oppositely disposed bosses and the coaxial bores therein constituting one of said pair of spaced-apart fulcrum mounting means.
Claim 6
Dependent Claim
58 words
A brake rigging for a four-wheel type of vehicle truck, as recited in claim 1, further characterized in that said two bell-crank levers are so disposed that their pair of arms move in a substantially horizontal plane, and in that said pair of links extend longitudinally in substantially parallel spaced-apart relationship and move in a substantially horizontal plane.
Claim 7
Dependent Claim
117 words
A brake rigging for a four-wheel type of vehicle truck, as recited in claim 1, further characterized by a pair of hand brake members respectively pivotally mounted intermediate their ends on said two brake beams, and by a hand brake link pivotally connected at one end to one end of one of said pair of hand brake members and at its opposite end to one end of the other of said pair of hand brake members, the other end of said other hand brake member being anchored against movement so that a manual brake application can be effected in response to the application of a manual force to the other end of said one hand brake member.
Claim 8
Dependent Claim
114 words
A brake rigging for a four-wheel type of vehicle truck, as recited in claim 1, further characterized in that each of said brake beams comprises a U-shaped channel member having a pair of parallel spaced-apart flanges and a web integrally connecting one edge of one flange with the corresponding edge of the other flange, said one flange and said web having formed integral therewith at least one boss provided with a bottomed bore, and in that a hand brake lever fulcrum means comprising a clevis having a cylindrical member at one end disposed in said bottomed bore and a pair of jaws at the other is removably mounted on each of said brake beams.
Claim 9
Dependent Claim
222 words
A brake rigging for a four-wheel type of vehicle truck, as recited in claim 1, further characterized in that each of said brake beams comprises: a. a U-Shaped channel member having a pair of parallel spaced-apart flanges and an integral web connecting one edge of one flange with the corresponding edge of the other flange, b. a pair of spaced-apart bosses formed integral with each of said flanges on the side thereof adjacent the other flange and coaxial with the spaced-apart bosses oN the other flange, each boss being provided with a bore that is coaxial with the bore in the corresponding boss on the other flange whereby each pair of oppositely disposed bosses and the coaxial bores therein constitute one of said pair of spaced-apart fulcrum mounting means, and c. a boss disposed on the side of each of said pair of spaced-apart bosses opposite that of the other of said pair of spaced-apart bosses, said boss being integral with one of said parallel spaced-apart flanges and said web and provided with a bottomed bore the axis of which is parallel to said spaced-apart flanges and a through bore that opens at one end at the top surface of said one flange, said bottomed bore and said through bore being so disposed that their axes intersect and form a right angle.
Claim 10
Dependent Claim
47 words
A brake rigging for a four-wheel type of vehicle truck, as recited in claim 1, further characterized in that said brake cylinder casing is disposed on one side of said one brake beam and said bolster is disposed on the other side of said one brake beam.
Claim 11
Dependent Claim
125 words
A brake rigging for a four-wheel type of vehicle truck, as recited in claim 1, further characterized in that each of said brake beams comprises a U-shaped channel member having a pair of parallel spaced-apart flanges and a web integrally connecting one edge of one flange with the corresponding edge of the other flange, said one flange and said web having formed integral therewith a pair of spaced-apart bosses each of which is provided with a bottomed bore, and in that a hand brake lever fulcrum means comprising a clevis having a cylindrical member at one end disposed in the bottomed bore in one of said spaced-apart bosses and a pair of jaws at the other is removably mounted on each of said brake beams.
Claim 12
Dependent Claim
36 words
A brake rigging for a four-wheel type of vehicle truck, as recited in claim 5, further characterized in that said pair of links are so disposed as to extend beneath the bolster in spaced-apart relation thereto.
Claim 13
Dependent Claim
31 words
A brake rigging for a four-wheel type of vehicle truck, as recited in claim 6, further characterized in that said hand brake link extends beneath the bolster in spaced-apart relation thereto.
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) | 1976-12-24 | 1977-06-25 | 1977-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-24 | 1981-06-25 | 1981-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-24 | 1985-06-25 | 1985-12-25 | $7700.00 | Window Closed / Lapsed |