Patent ID: 7341237

Claim:
A valve mechanism for selectively sealing and unsealing a valve opening in a housing, the valve opening having a valve seat surface, the valve mechanism comprising: at least one valve member movable in said housing in directions parallel to and perpendicular to said valve seat surface of the valve opening; a drive plate in said housing connected to said at least one valve member, said drive plate being configured for translational motion within said housing whereby the parallel motion of said at least one valve member is accomplished; and means for effecting the perpendicular motion comprising: control slots in said drive plate; complementary slots in said at least one valve member, said complementary slots cooperate with and at least partially overlap the respective control slots; and a plurality of unattached roll bodies mounted in said at least one valve member, each said roll body extending into a control slot and a complementary slot; whereby cooperative motion between said roll bodies and the control slots and complementary slots results in selective opening and closing of the valve opening.