Multi-step pressure reducing apparatus and method

Details Multi-step pressure reducing apparatus and method Multi-step pressure reducing apparatus and method

1997-09-03

1998-11-24

Capossela, Ronald C.

Refrigeration

Processes

Vacuumizing an open outlet chamber

62268, 417244, F25B 1900

Patent

active

058392890

ABSTRACT:
The air pressure within a part of an appliance (e.g., a refrigeration pipe of an air conditioner unit) is reduced as the part is conveyed on a conveyor. This pressure reduction is accomplished by connecting a first end of a vacuum hose to the part, and then rotating a rotatable member to which the second end is connected. That causes the second end to be alternately brought into and out of communication with a vacuum source, whereby a vacuum is intermittently induced in the part. During periods when the second end of the vacuum hose is out of communication with the vacuum source, that second hose end is placed in communication with a pressure at least at atmospheric, to temporarily increase the pressure in the part.

REFERENCES:
patent: 3304733 (1967-02-01), Coffman
patent: 4361418 (1982-11-01), Tscheppe
patent: 4942053 (1990-07-01), Franklin et al.

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