Mckinley Medical L.l.l.p

Other

L Dean Stansbury

Andrew N Lamborne

Douglas J McDowell

Jerome M Keane

A turbomolecular pump is provided. In one arrangement, a stator stack and rotor stack have corresponding conical or frustum shapes that allow for adjusting the clearance between the stator vanes and rotor vanes of the pump to provide adjustable compression ratios and/or to adjust clearances. In another arrangement, the actuator or drive mechanism of the pump is formed from coils attached to the upper stage of rotor vanes which are controlled to interact with a plurality of stationary magnets attached to the housing of the pump to rotate the stator stack. In another arrangement, a control system of the pump utilizes the coils of the rotor drive to dynamically balance the pump during operation.

Turbomolecular vacuum pump for ionized matter and plasma fields

A catheter flushing device includes a chamber covered with a movable member (e.g., a flexible diaphragm) that can be compressed by exertion of pressure on the diaphragm; and a valve having a first position allowing fluid from a fluid source to fill the chamber, and a second position allowing fluid from the chamber to flow through the catheter when pressure is exerted on the movable member. In particular, the catheter flushing device includes a housing having a cylindrical valve opening, an inlet port for connection with the fluid source, and an outlet port for connection with the catheter. The chamber is defined by a flexible diaphragm sealed about a region of the housing. The chamber can be compressed by manually exerting pressure on the diaphragm by means of a thumb or finger. A passageway extends through the housing from the chamber to the valve opening. A rotatable valve member within the valve opening has a channel directing fluid from the inlet port into the chamber in the first position, and a channel directing fluid from the chamber to the outlet port in the second position. The device can also be equipped with a KVO flow path through the housing between the inlet and outlet ports to maintain a substantially constant, minimal flow from the fluid source to the catheter that bypasses the valve assembly.

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Wheat Ridge, CO, United States of America

L Dean Stansbury