Hydraulic hand brake for pressure medium actuated brakes of rail

Details Hydraulic hand brake for pressure medium actuated brakes of rail Hydraulic hand brake for pressure medium actuated brakes of rail

1975-04-16

1976-10-05

Schwadron, Martin P.

Expansible chamber devices

With releasable stop or latch means to prevent movement of...

Engages member coaxial with and rotatable relative to...

92 24, 92 27, 92 31, 92 63, 92107, 92130R, 188265, 192111A, F15B 1526

Patent

active

039837920

ABSTRACT:
A hydraulic hand brake for a fluid pressure actuated brake on a railway vehicle has a cylinder and piston assembly extending coaxially from the brake cylinder. A threaded rod having a non-locking thread extends from the piston and has threaded thereon a traveling nut with a coupling surface on a side away from the brake piston engageable with a second coupling surface on a ring attached to the cylinder. A spring urges the nut in the direction to engage the coupling surfaces and a control piston engages the nut to disengage the coupling surfaces when the control piston is subjected to a hydraulic pressure. Subjecting the piston of the cylinder and piston assembly to a hydraulic pressure will cause the threaded rod to engage the brake piston and to move the brake piston in the braking direction.

REFERENCES:
patent: 2873579 (1959-02-01), Safford
patent: 3051136 (1962-08-01), Muehlhausen
patent: 3331472 (1967-07-01), Swift
patent: 3472124 (1969-10-01), Roselius
patent: 3597016 (1971-08-01), Gachot
patent: 3738229 (1973-06-01), Kraft
patent: 3756361 (1973-09-01), Persson
patent: 3765522 (1973-10-01), Dahlkvist
patent: 3809189 (1974-05-01), Farr
patent: 3826176 (1974-07-01), Ike

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