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:
Jul. 19, 1977
Filed:
Apr. 29, 1976
Douglas Howard Durland, Palo Alto, CA (US);
Malcolm Canmore McGilvray, Jr, Palo Alto, CA (US);
Beckman Instruments, Inc., Fullerton, CA (US);
Abstract
An improved apparatus and method for braking the rotation of a centrifuge rotor is disclosed comprising magnet means operable in a first position wherein substantially no eddy currents are induced in a rotating rotor made of electrically conductive material by the magnetic flux of the magnet means and a second position wherein eddy currents are induced into the rotating rotor sufficiently to slow the rotor. In the preferred embodiment, the magnet means is movable by fluid pressure from the second position to the first position and movable by a bias force from the first position to the second position.