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. 08, 2004
Filed:
Mar. 31, 2003
Kenneth Rainin, Piedmont, CA (US);
James S. Petrek, Danville, CA (US);
Rainin Instrument, LLC, Oakland, CA (US);
Abstract
An air displacement pipette having axially spaced annular sealing and lateral support zones and regions on the pipette's mounting shaft and tip, respectively, the annular sealing zone comprising an annular sealing surface outward of an outer surface of the mounting shaft at a lower end thereof and a sidewall of the pipette tip in the sealing region being sufficiently thin as to expand slightly and form an interference fit and air tight seal between the sealing surface and the sealing region when the sealing zone penetrates the sealing region and an outer diameter of the mounting shaft in the lateral support zone being equal to or slightly greater than an inner diameter of the pipette tip in the lateral support region to produce an secondary interference fit or air tight seal between the mounting shaft and pipette tip.