Sarcos Lc

Marc Oliver

Stephen C Jacobsen

Clark C Davis

David F Knutti

Michael G Morrison

A molecular drag vacuum pump configured for pumping a gas stream from an inlet to an outlet, the pump including a high-speed spinning disk having a channel formed in its edge, disposed within a housing. A passageway is formed on the inside of the housing adjacent the disk, and gas comes in contact with surfaces of the spinning disk in successive stages, conformable wipers being disposed adjacent the spinning disk to direct the gas stream to the successive stages. The disk can be powered by an integral motor, comprising permanent magnets associated with the disk and cooperating coils associated with the housing.

Compact molecular drag vacuum pump

An improved piston-type vacuum pump comprises a reciprocating piston disposed within a cylinder having a proximal end and a distal end, an inlet port formed in the side of the cylinder near the proximal end, and a spring-biased outlet valve, such as a poppet valve or a rocker valve, disposed at the distal end of the cylinder. The piston stroke is configured to provide zero or negative clearance between the piston head and the face of the outlet valve at the end of the compression stroke. The piston reciprocates within the cylinder from a first position wherein the surface of the piston head is proximal of the inlet port, to a second position wherein the surface of the piston head is beyond the distal end of the cylinder, so as to contact the face of the outlet valve in its open position. The piston top and outlet valve face remain in contact until the piston has retracted into the distal end of the cylinder, allowing the valve to seal the distal end of the cylinder prior to the beginning of the expansion stroke, such that there is substantially no dead volume within the cylinder at the beginning of the expansion stroke.

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Sandy, UT, United States of America

Marc Oliver