Manual and motor actuated railway car door

Details Manual and motor actuated railway car door Manual and motor actuated railway car door

1978-03-16

1981-09-22

Mitchell, David M.

Railway rolling stock

Special car bodies

Passenger

16 66, 49141, 49362, 105348, 160331, 277 53, B60J 506, B61D 1900, E05B 6520

Patent

active

042903688

ABSTRACT:
A sliding door for railroad cars which may be manually operable but is also provided with a pneumatic device and a pneumatic control circuit operably connected to the door for closing the door by power operation, which pneumatic device, after effecting power closing of the door, is automatically vented of all pneumatic pressure and operably disconnected from the door so as not to offer any resistance during manual operation, and, in particular, during an opening phase of the door by manual operation subsequently to a pneumatic closing phase of the same door.

REFERENCES:
patent: 593190 (1897-11-01), Bernhardt
patent: 822639 (1906-06-01), Vogel
patent: 1574197 (1926-02-01), Hynes
patent: 1788409 (1931-01-01), Rowntree
patent: 2096043 (1937-10-01), Johnson et al.
patent: 2404845 (1946-07-01), Joachim
patent: 3371947 (1968-03-01), Gridley
patent: 3587477 (1971-06-01), Ferris
patent: 3782034 (1974-01-01), Lynn et al.

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