Patent ID: 9387996
Filing Date: 2016-07-12
CPC Classification: B65G,Y10T

Claim Text:
1. Apparatus for delivering an air blast, comprising; a. a shell having a cup-like portion defining three sides of the shell and a plate defining a fourth side of the shell, the plate being secured to the cup like portion about the periphery thereof, space between the cup-like portion and the plate defining a reservoir for air; the plate having an aperture formed therein via which the air blast is delivered; b. a closure member residing within the shell and being movable, responsively to air entering the shell, between a position at which the closure member contactingly closes the aperture and at which the closure member is spaced from the aperture, the closure member having a rounded surface for complemental flush fitting against an edge of the aperture to close the aperture; c. the cup like portion comprising a circumferential guide for constraining the closure member from lateral movement; and d. a seal between the closure member and the circumferential guide portion of the cup-like portion of the shell, for permitting air flow between the shell interior and the closure member towards the aperture, but blocking air flow between the shell interior and the closure member in a direction away from the aperture.