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:
Oct. 14, 1997
Filed:
Jan. 03, 1997
Applicant:
Inventors:
Edwin K Shenk, Westford, MA (US);
Christopher P Ricci, Braintree, MA (US);
Assignee:
Polaroid Corporation, Cambridge, MA (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16H / ;
U.S. Cl.
CPC ...
7442 / ; 74441 ; 74841 ;
Abstract
A nut assembly intended for use with a lead screw in precision movement devices for compensating for harmonic error from the lead screw by utilizing one or more partial nuts which are opposed along an axis of the lead screw such that the partial nuts ride the lead screw independently. An averaging apparatus is used to hold the partial nuts such that as the partial nuts follow the harmonic error, the error is averaged through the averaging apparatus to compensate for the harmonic error allowing the resulting motion of the nuts to be substantially linear.