Pressure control system for free-floating piston

Details Pressure control system for free-floating piston Pressure control system for free-floating piston

1996-08-22

1998-07-14

Derakshani, Philippe

Dispensing

With recorder, register, indicator, signal or exhibitor

Position or extent of motion indicator

222334, 222389, B67D 522

Patent

active

057790981

ABSTRACT:
An apparatus and method are disclosed to force a frozen food product out of a receptacle by moving a piston back and forth within the receptacle. Pressurized air is used to move the piston toward the frozen product, thereby forcing the frozen product out of the receptacle. To move the piston away from the frozen product, the pressurized air is sent through a venturi that also connects to the receptacle. The flow of pressurized air through the venturi creates a vacuum in the receptacle. The vacuum pulls the piston away from the frozen product.

REFERENCES:
patent: 3327906 (1967-06-01), Gomann
patent: 4886189 (1989-12-01), Vanderjagt
patent: 5048724 (1991-09-01), Thomas
patent: 5114054 (1992-05-01), Watson
patent: 5150820 (1992-09-01), Mcgill
patent: 5259842 (1993-11-01), Plechinger et al.
patent: 5265764 (1993-11-01), Rowe et al.
patent: 5405054 (1995-04-01), Thomas
patent: 5452824 (1995-09-01), Danek et al.
patent: 5492249 (1996-02-01), Beach

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