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:
Jun. 04, 2002
Filed:
Aug. 21, 1998
Ryan D. Bruneau, Sunnyvale, CA (US);
Kenneth M. Martin, Palo Alto, CA (US);
Louis B. Rosenberg, San Jose, CA (US);
David F. Moore, Redwood City, CA (US);
Bruce M. Schena, Menlo Park, CA (US);
Immersion Corporation, San Jose, CA (US);
Abstract
A force feedback interface device includes improvements in a mechanical linkage and drive mechanism. The force feedback device is coupled to a host computer and includes a user manipulatable object graspable by a user, at least one actuator that outputs a force on the user object, and a sensor for sensing motion of the user object. A linkage mechanism provides the user object with degrees of freedom and includes five members rotatably coupled to each other. The linkage mechanism supports the bearings of the device with protrusions rotatably coupled to central members of the linkage. The drive mechanism is preferably a belt drive that includes an idler positioned adjacent to a drive pulley and which impedes radial displacement of a belt away from the drive pulley, and thus impedes losing positive engagement of the belt, without preloading the belt. The idler can be a passive idler that does not contact the belt during operation and/or an active idler that continuously contacts the belt. Some or all portions of the linkage mechanism and the drive mechanism are preferably symmetrical, allowing low cost manufacture of the device.