Assignee: Aerotech, Inc.

Location: Pittsburgh, PA
No. of patents: 19

Number	Title	Issue Date
7420298	Water cooled high precision z-theta stage A high precision z-theta stage having a horizontal translation axis (z-axis) and a rotary axis (theta-axis) parallel with the translation axis comprises parallel spaced apart linear translation stages, a carriage supported between the parallel translation stages, an...	09/02/2008
7401412	High precision gantry machine with expansion joint A Cartesian gantry system having an expansion joint between an X-bridge stage and a Y-translation stage comprises a flexure plate having surfaces secured to the X-bridge stage and the Y-translation stage and bolster flanges extending between the X-bridge stage and Y...	07/22/2008
7105956	High precision z-theta stage A high precision z-theta stage having a horizontal translation axis (z-axis) and a rotary axis (theta-axis) parallel with the translation axis comprises parallel spaced apart linear translation stages, a carriage supported between the parallel translation stages, an...	09/12/2006
7084533	Dual-function three-axis positioning system A dual-function, three-axis positioning system having a high precision z-theta state with a horizontal translation axis (z-axis) and a rotary axis (theta-axis) parallel with the translation axis and a second horizontal translation axis (x-axis) comprises parallel sp...	08/01/2006
7038334	High precision laser machining apparatus A high precision laser machining apparatus having a horizontal translation axis (z-axis) and a rotary axis (theta-axis) parallel with the translation axis comprises parallel spaced apart linear translation stages, a carriage supported between the parallel translatio...	05/02/2006
6700249	Direct drive vertical lift and rotation stage A direct drive vertical lift and rotation stage comprises an annular z-axis housing having a central opening, a z-axis rotor assembly journaled within the central opening of the z-axis housing, a motor between the z-axis housing and the z-axis rotor, an a...	03/02/2004
6664664	Printed circuit linear motor A linear motor includes an armature having a plurality of side-by-side electrically conductive coils formed on an electrically and magnetically nonconductive substrate with adjacent coils electrically isolated from each other. Each coil includes a plurali...	12/16/2003
6588081	Small footprint direct drive mechanical positioning stage A small footprint mechanical positioning stage capable of operating in two perpendicular orientations comprises a base plate, a carriage plate, linear bearings, a brushless linear motor, and a linear encoder. The linear bearings, the linear motor, and the...	07/08/2003
6501403	Calibrated encoder multiplier A device for receiving first and second analog signals consisting of two sinusoidal signals shifted in phase from an encoder and outputting digital pulses corresponding to the approximate number of equal steps the system of which the encoder is a part has...	12/31/2002
6486574	Small footprint vertical lift and rotation stage A small footprint vertical lift and rotary positioning stage comprises a bottom wedge and a top wedge, a linear bearing between the bottom wedge and the top wedge, cam grooves and cam surfaces for constraining the motion of the top wedge in a vertical dir...	11/26/2002
6442851	Direct drive tilt and goniometer stage A low profile tilt stage comprises a planar base, a cradle defining a cylindrical surface having a cylindrical axis parallel to the base, a table mounted on the cradle by curvilinear bearings, a curvilinear direct drive brushless motor between the cradle ...	09/03/2002
6356219	Calibrated encoder multiplier A device for receiving first and second analog signals consisting of two sinusoidal signals shifted in phase from an encoder and outputting digital pulses corresponding to the approximate number of equal steps the system of which the encoder is a part has...	03/12/2002
5731641	Linear motor driven vertical lift stage A linear motor driven positioning stage comprises a wedge positioned between a carrier and a base and a linear motor positioned between the wedge and the base for moving the wedge relative to the base along a second axis whereby the carrier moves relative...	03/24/1998
5134404	Quadrature error correction A method of correcting quadrature signal errors comprises the steps for generating an error function signal E by summing the squares of the quadrature signals and subtracting a constant K therefrom, saving the value of the error function E at θ equals ap...	07/28/1992
5018862	Successive fringe detection position interferometry A stable single-frequency laser interferometer comprises a Michelson interferometer having a power stabilized single-frequency laser and a dual light sensor comprising two closely spaced very small sensor surfaces mounted in substantially the same plane. ...	05/28/1991
4884016	Closed loop torque angle control of synchronous motor A closed loop motor system having a motor with a plurality of poles and motor windings associated therewith. The poles define full step motor output positions. The system is of the type that assigns intermediated current values to the motor windings for f...	11/28/1989
4819246	Single frequency adapter A single frequency adapter for a gas laser comprises a jacket for engaging and being secured to the casing surrounding the gas laser. An induction coil is fixed within the jacket and positioned to surround the hollow mirror mount at one end of the laser t...	04/04/1989
4652806	Micro-stepping translator controller A micro-stepping translator controller for supplying current to a stepping motor having a plurality of windings comprises a power supply for supplying current to all windings and electronic switches for gating current to all windings. Logic means receive ...	03/24/1987
4554512	Switching amplifier with MOSFET driver circuit A switching amplifier comprises an input terminal connected to a d.c. power supply and an output terminal connected to a load. At least one power transistor is placed in series with the input and output terminals. A PWM circuit outputs a pulse width modul...	11/19/1985

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Assignee: Aerotech, Inc.