Pneumatically operated air lock for air ducts, particularly for

Details Pneumatically operated air lock for air ducts, particularly for Pneumatically operated air lock for air ducts, particularly for

1978-03-09

1979-12-18

Rosenthal, Arnold

Valves and valve actuation

Fluid actuated or retarded

Pilot or servo type motor

251 38, 251 611, F16K 31385

Patent

active

041790952

ABSTRACT:
A pneumatically operated air lock, comprising in combination a casing one end of which is connected to an air conveying plant, while the other end is provided with an outlet grid, a choke duct arranged in the casing and having an outlet area coincident with the delivery area of the casing, and a membrane positioned within the choke duct, capable of taking an open position wherein the membrane is substantially adherent to one wall of the choke duct, allowing the passage of the air, and a second position wherein said membrane extends across the choke preventing the outflow of the air.

REFERENCES:
patent: 3685788 (1972-08-01), Bloomfield
patent: 3732888 (1973-05-01), Convain et al.

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