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:
Apr. 14, 1992
Filed:
Apr. 08, 1991
Anthony M Labriola, Woburn, MA (US);
Costar Corporation, Cambridge, MA (US);
Abstract
A hand-held, manually operated pipetter having a variable volume controlled by a rotating spindle and adjusting screw that control the position of a stop which limits the upper end of the stroke of the pipetter piston. The lower end of the stroke is controlled by a movable stop urged to a first position by a blow-out spring which may be overcome with additional force applied to the pipetter piston when the lower stop is engaged. The pipetter also includes a stripper which surrounds the tip holder and which is actuated by a rod movable in the body of the pipetter along a path parallel to the path of the pipetter piston. The pipetter piston and the stripper rod are controlled by separate actuators which may readily be engaged by the thumb of the hand which holds the body of the device.