Air cylinder with anti-blowby piston

Details Air cylinder with anti-blowby piston Air cylinder with anti-blowby piston

F - Mech Eng,Light,Heat,Weapons

01

B

F01B 1/00 (2006.01) F01B 7/00 (2006.01) F15B 15/14 (2006.01) F16J 15/16 (2006.01)

Patent

CA 2119920

ABSTRACT The present invention provides a unique design for a piston in an air cylinder which eliminates or minimizes the occurrence of blowby. The present invention provides a piston with a beveled surface leading into the seal cavities on the open side of the seals. By providing this beveled surface: (1) air in the cylinder can get into the cavity and beneath the lip of the "U" cup seal to flair the seal against the cylinder wall thus achieving a positive seal; and (2) the "suction-cup" like tendency of the seal lips to adhere to the cavity walls in the event of temporary lip collapse is prevented.

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