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, 1980
Filed:
Jun. 18, 1979
Howard R Davidson, Palo Alto, CA (US);
Beckman Instruments, Inc., Fullerton, CA (US);
Abstract
A secondary seal arrangement for use in a rotor to ensure the retention of the fluid sample within the test tube cavity of the rotor during high speed centrifugation in an ultracentrifuge. The secondary seal arrangement acts in cooperation with both a spacer member over the centrifuge tube and a sealing plug for the rotor cavity to provide a seal of the cavity over the test tube to reduce the possibility of escape of any fluid which may inadvertently exit the centrifuge tube itself. The secondary seal is positioned within the rotor tube cavity above the capping seal for the centrifuge tube to provide a closure of the rotor tube cavity above the centrifuge tube.