Vacuum-breaking valve for a refrigerated compartment

Refrigeration – With means preventing or handling atmospheric condensate... – Operating on insulation – e.g. – vent to refrigerated compartment

Reexamination Certificate

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Details

C062S331000, C137S533270, C137S543150

Reexamination Certificate

active

07107780

ABSTRACT:
A vaccum-breaking valve comprising: a tubular body (10) mounted through one of the walls (P) of the cabinet (G) and having inner (11) and outer (12) ends, a valve seat (15) defining a fluid communication between the inside and the outside of cabinet (G); and a seal constantly biased towards a closed position, blocking said fluid communication and dispalceable towards an open valve position. The seal comprises a slide (20), which is axially and slicingly mounted through the valve seat (15) and has a surrounding sealing ring (25), which is seated against the valve seat (15) when the slide (20) is displaced to the closed seal position, the slide (20) being provided with at least one air passage (24) interconnecting the upstream and downstream sides of the valve seat (15) when the slide (20) is in the open seal position.

REFERENCES:
patent: 3952542 (1976-04-01), Berkowitz
patent: 4569208 (1986-02-01), Villa
patent: 4938254 (1990-07-01), Gimby
patent: 5271240 (1993-12-01), Detrick et al.
patent: 5836170 (1998-11-01), Perkins et al.
patent: 6176776 (2001-01-01), Finkelstein et al.
patent: 6672094 (2004-01-01), Carden et al.
patent: 6672096 (2004-01-01), Lopes
patent: 030 046 (1981-06-01), None
patent: 547 385 (1968-11-01), None
patent: 552 (1956-08-01), None

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