Latching mechanism for chamber access door

Details Latching mechanism for chamber access door Latching mechanism for chamber access door

1990-04-06

1991-08-06

Moore, Richard E.

Closure fasteners

Wedges

220324, 292144, 292150, 292157, 292 33, E05C 102

Patent

active

050371479

ABSTRACT:
The access door of a chamber housing opening is secured releasably in closed position by a latching mechanism provided on each of the four edges of the door. Each latching mechanism includes a plurality of spaced apart wedges projecting outwardly from the edge of the door for releasable registry with a plurality of spaced apart wedges on a wedge member mounted on the chamber housing for movement by an hydraulic cylinder between a door opening position in which the wedges on the door register with spaces between the wedges on the wedge member, and a door latching position in which the wedges on the wedge member are moved by the hydraulic cylinder into sliding, wedging engagement with the wedges on the door, whereby to draw the door into sealing engagement with the chamber housing adjacent the periphery of the opening in the housing. An O-ring seal disposed about the periphery of the door is arranged to engage the chamber housing upon closure of the door, to seal the chamber for evacuation or pressurization. Locking mechanism includes an air cylinder having a piston rod movable into registering openings in brackets mounted on the door and chamber housing when the door is latched in closed position, to secure the closed position against inadvertent release.

REFERENCES:
patent: 1874833 (1932-08-01), Taylor
patent: 2718239 (1955-09-01), Erbguth
patent: 2926012 (1960-02-01), Maher
patent: 3166144 (1965-01-01), Price
patent: 3311255 (1967-03-01), Loveless
patent: 4347944 (1982-09-01), Moldrup
patent: 4883637 (1989-11-01), McDaniels, Jr.

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