A bearing housing for a two-wheel air cycle machine includes a first housing portion, a second housing portion, a third housing portion, and a journal bearing bore. The first housing portion is centered around an axis and has a first side and a second side. The second side is positioned axially away from the first side. The second housing portion is centered around the axis and has a first side and a second side. The second side is positioned axially away from the first side. The first side of the second housing portion connects to the second side of the first housing portion. The third housing portion is centered around the axis and has a first side and a second side. The second side is positioned axially away from the first side. The first side of the third housing portion connects to the second side of the second housing portion. The journal bearing bore is centered axially with in the bearing housing and has a diameter of D.sub.1.

A centrifugal compressor includes a shaft member and an impeller. The shaft member extends in an axial direction and is rotatable. The impeller includes a hub that is disposed on an end portion of the shaft member, and a plurality of blades disposed on an outer peripheral surface of the hub. The impeller has a shape that tapers outward in the axial direction. A cover member is disposed at least at an end portion of the impeller outside in the axial direction. The cover member is joined to outer peripheries of the plurality of blades in a radial direction and covers at least a part of the plurality of blades from outside in the radial direction. A first bearing is disposed outside in the radial direction of the cover member, the first rotatably supporting the impeller.

A high precision air bearing stage for wafer inspection and a method of runout errors detecting and compensating. The air bearing stage includes a base block, a crossbeam mounted on the base block, a sliding table configured to carry a compensation stage, a motor and a grating ruler used to drive the sliding table to move along the crossbeam, sensors used for monitoring the position of the sliding table in real time, air-bearing used for supporting the sliding table, and a compensation stage configured to compensate the runout errors of the air bearing stage based on the real-time detecting data from the sensors. The air-bearing includes a first air-bearing, a second air-bearing and a third air-bearing.

Provided is a contactless vertical transfer device using a linear motor. The contactless vertical transfer device using a linear motor includes: a transfer unit for picking up an article; and a linear motor located on a side portion of the transfer unit to move the transfer unit, wherein the linear motor comprises at least one driving unit that is located on a side portion of the transfer unit and provided with a mover which a coil is wound; and a rail unit that is located apart from the mover by a predetermined distance in a lateral direction and provided with a plurality of magnet portions disposed in a transfer direction of the transfer unit. The transfer unit is moved along the rail unit by a thrust force of the mover and the magnet portion.

An air bearing assembly is disclosed. The air bearing assembly may comprise a print component to interact with an imaging plate, the imaging plate being rotatable relative to the print component. The air bearing assembly may comprise an air bearing pad positioned adjacent to a surface of the imaging plate, the air bearing pad to generate a cushion of air to maintain a defined distance between the print component and the imaging plate. A method and a print apparatus are also disclosed.

A bearing housing for a two-wheel air cycle machine includes a first housing portion, a second housing portion, a third housing portion, and a journal bearing bore. The first housing portion is centered around an axis and has a first side and a second side. The second side is positioned axially away from the first side. The second housing portion is centered around the axis and has a first side and a second side. The second side is positioned axially away from the first side. The first side of the second housing portion connects to the second side of the first housing portion. The third housing portion is centered around the axis and has a first side and a second side. The second side is positioned axially away from the first side. The first side of the third housing portion connects to the second side of the second housing portion. The journal bearing bore is centered axially with in the bearing housing and has a diameter of D.sub.1.

An air bearing assembly is disclosed. The air bearing assembly may comprise a print component to interact with an imaging plate, the imaging plate being rotatable relative to the print component. The air bearing assembly may comprise an air bearing pad positioned adjacent to a surface of the imaging plate, the air bearing pad to generate a cushion of air to maintain a defined distance between the print component and the imaging plate. A method and a print apparatus are also disclosed.

A linear electromagnetic machine includes a stator, a translator, and a bearing system. The bearing system maintains alignment against lateral displacement of the translator relative to the stator, as the translator reciprocates axially. More particularly, the bearing system maintains a motor air gap between the stator and a magnetic section of the translator. The stator includes a plurality of stator teeth and windings, which form a plurality of phases. The stator teeth and windings are arranged using a hoop stack with spines to form a stator bore and define the motor air gap. The bearing system can include bearing housings that are configured to form a bearing interface with a surface of the translator. The bearing interface can include a contact bearing or a non-contact bearing, such as a gas bearing. Current is controlled in the phases to convert between electrical energy and kinetic energy of the translator.

A substrate positioning device for radially positioning a substrate including a first mounting frame, and a plurality of centering devices coupled to the first mounting frame and spaced apart from one another. Each of the plurality of centering devices including a mount, a flexure element coupled to the mount and having a radial edge, and an adjustment member coupled to the mount. The adjustment member is adjusting between a retracted state and an extended state for pivoting the flexure element between a first position and a second position with respect to the mount. Each centering device is separately actuatable to move the flexure element of a respective centering device with respect to an edge of the substrate thereby radially positioning the substrate with respect to the first mounting frame.

An air turbine drive spindle includes a rotary shaft, a bearing portion, a damper ring, a cover member, and at least one or more O rings. The bearing portion surrounds at least a portion of an outer circumferential surface of the rotary shaft. The damper ring is disposed at the outer circumferential side relative to the bearing portion with a gap being interposed therebetween. The cover member is disposed at the outer circumference side relative to the damper ring with a gap being interposed therebetween, and is configured to store the rotary shaft, the bearing portion, and the damper ring. At least one or more O rings are disposed in each of the gap and the gap.