The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 25, 2008
Filed:
Dec. 16, 2002
Kenneth Cheng-hoe Nai, Edinburgh, GB;
Nicholas John Weston, Gwent, GB;
Geoffrey Mcfarland, Gloucestershire, GB;
David Roberts Mcmurtry, Gloucestershire, GB;
Kenneth Cheng-Hoe Nai, Edinburgh, GB;
Nicholas John Weston, Gwent, GB;
Geoffrey McFarland, Gloucestershire, GB;
David Roberts McMurtry, Gloucestershire, GB;
Renishaw PLC, Gloucestershire, GB;
Abstract
A rotary drive mechanism is disclosed comprising a housing (), a first motor () having a first rotor () and a first stator () connected to the housing and a second motor () having a second rotor () and a second stator () connected to the housing characterised in that the second motor is mechanically independent of the first motor whereby acceleration torques of the first motor are at least partially inertia balanced by the second motor. The balancing may be effected by equal and opposite rotation of the second motor. Control means may be provided to provide the second motor with a current which is proportional to that supplied to the first motor. Also disclosed is a positioning device and a probe having the rotary drive mechanism.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile