| 摘要 |
861,286. Shock absorbers; railway vehicle buffers; railway vehicle combined buffer and draw gear. ATELIERS DE CONSTRUCTION DU NORD DE LA FRANCE. Aug. 15, 1958 [June 9, 1958], No. 26302/58. Addition to 855,818. Classes 103(5) and 108(3). The hydraulic shock absorber described in the parent Specification is applied to a shock absorbing coupling device for railway stock. When a shock is exerted on a drawn head 24 it is transmitted to a plunger body 3 by means of a stem 16. The plunger begins to move into the interior of a casing 7 which bears against a stop rigidly connected to the housing 23. This movement of the plunger causes movement of a piston 2 inside the plunger body. The shock absorber consisting of the piston 2, the plunger body and a floating body 1 then functions in the manner described in the parent Patent. A volute spring 11 opposes the movement of the plunger 3. When a tractional force is exerted on the draw head 24, it is transmitted by means of the stem 16 and a draw strap 18, pinned thereto by a pin 19, to a plate 7a forming the end of a casing 7. The casing 7 telescopes over the plunger 3 which bears against a stop rigidly connected to the housing 23. This telescoping movement is again opposed by the shock absorber mechanism and the volute spring.
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