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:
May. 20, 2014
Filed:
Dec. 18, 2012
Seagate Technology Llc, Cupertino, CA (US);
Shuang Quan Min, Singapore, SG;
June Christian Ang, Singapore, SG;
Tze Ming Jimmy Pang, Singapore, SG;
Kian Keongh Ooi, Singapore, SG;
Paul E. Dienstbier, Boulder, CO (US);
Seagate Technology LLC, Cupertino, CA (US);
Abstract
An apparatus and associated methodology for retracting a first member in relation to a second member. The first member may be selectively moveable by a first motor and the second member may be selectively moveable by a second motor that operably generates a back electromagnetic force (BEMF) voltage V. In an embodiment a retract control circuit may control movement of the first member via the first motor in response to a loss of supply power to the second motor. An embodiment of the apparatus may include a backup power source storing a voltage Vafter the loss of supply power. Another embodiment of the apparatus may include retract logic operative on the retract control circuit to divide the Vfrom the Vto energize the first motor by the Vand not the Vwhen the Vis greater than a predetermined threshold voltage and a loss of the supply power to the second motor is detected.