Apparatus for closing and sealing a doorway

Details Apparatus for closing and sealing a doorway Apparatus for closing and sealing a doorway

1981-12-18

1983-09-13

Kannan, Philip C.

Movable or removable closures

Mounted for multidirectional or oblique movement

Initial or terminal movement transverse to sliding movement...

110173R, E05D 1510

Patent

active

044034482

ABSTRACT:
A door is mounted on a carrier to move back and forth with the carrier between open and closed positions relative to a furnace doorway and to move inwardly relative to the carrier to seal the doorway. Bearing means engage the outer side of the carrier to support the carrier with rolling friction and to sustain the outward thrust which is imposed on the carrier when the door is moved inwardly to seal the doorway. The bearing means comprise a single spherical ball which is captivated in a cage to roll back and forth when the carrier is shifted and, at the same time, to spin universally about its own center.

REFERENCES:
patent: 3059290 (1962-10-01), Tobin
patent: 3399875 (1968-09-01), Ipsen
patent: 3410547 (1968-11-01), Bielefeldt
patent: 3558112 (1971-01-01), Gaede
patent: 3583690 (1971-06-01), Bornor
patent: 4165667 (1979-08-01), Brolund et al.

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