BREAK AWAY SLIDE MECHANISM WITH ENHANCED POSITIONING ACCURACY

Title:

BREAK AWAY SLIDE MECHANISM WITH ENHANCED POSITIONING ACCURACY

Document Type and Number:

WIPO Patent Application WO/2011/062686

Kind Code:

A3

Abstract:

An actuator for selectively extending and retracting a probe in a measuring instrument comprises an actuator body, a carriage having a first aperture slidably attached to the body, and a second aperture receiving a probe holder having a probe. The first aperture of the carriage, which surrounds the actuator body, includes a first plurality of magnets disposed around an inner circumference of the aperture. The actuator body includes a lead screw, a round lead screw nut mated with the lead screw, and a second plurality of magnets arranged on a periphery of the lead screw nut, generally aligned with the first plurality of magnets. The magnets are arranged so that the carriage may be displaced with respect to the actuator body a sufficient amount that the magnets do not significantly restrain the further movement of the carriage.

Inventors:

LAWSON DAVID E (US)
STEVENS WILLIAM E JR (US)

Application Number:

PCT/US2010/051099

Publication Date:

July 21, 2011

Filing Date:

October 01, 2010

Export Citation:

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Assignee:

QUALITY VISION INT INC (US)
LAWSON DAVID E (US)
STEVENS WILLIAM E JR (US)

International Classes:

H02K41/02; F16H1/18; F16H25/20; H02K7/06

Foreign References:

JP2009165204A	2009-07-23
JP2000092811A	2000-03-31
JPH0523980A	1993-02-02
US6084326A	2000-07-04
US5796187A	1998-08-18

Other References: