Piston unit with rolling membrane

Details Piston unit with rolling membrane Piston unit with rolling membrane

1990-06-13

1992-02-25

Look, Edward K.

Expansible chamber devices

Collapsible chamber wall portion

Wall portion formed of flexible material

F16J 302

Patent

active

050902997

ABSTRACT:
A piston unit is disclosed which includes a pressure-compensating device wherein pressure variations in a product line are dampened by subjecting a side of the piston (6) remote from the product line (5) to a variable air pressure. Rolling membranes (7,8) are positioned on both sides of the piston and enclose between them a chamber (13) which is connected to a source of vacuum (14) so as to secure contact of the membranes with the piston. The vacuum is distributed in the chamber (13) with the help of a vacuum line (15) with enlarged outlet area, and is distributed over the end faces of the piston (6) by way of a network of ducts (19,20) in the piston.

REFERENCES:
patent: 3428042 (1964-08-01), Chestnut
patent: 3741692 (1973-06-01), Rupp
patent: 4313464 (1982-02-01), Major

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