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:
Aug. 29, 1995
Filed:
Jun. 14, 1994
Robert W Flesher, Baltimore, MD (US);
Other;
Abstract
A pipettor assembly includes a pipettor and a pipette tip. In one embodiment, the pipettor has a tubular body which defines a hollow central bore. The central bore is closed at a first end and open at a second end. A cutout penetrates a side wall of the body near the second end to expose the central bore. A resilient, flexible member sealably covers the cutout. The pipette tip is coupled to the second end of the pipettor. A liquid is drawn into the pipette tip by depressing and then releasing the flexible member. A liquid is expelled by depressing the flexible member. In another embodiment, the pipettor has an elongated body with an air passage between the second and a side portion of the body. A flexible membrane is sealably attached to the side portion of the body. A deflection of the flexible membrane will cause a change in the volume of the air passage for picking-up and expelling liquids from the pipette tip.