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. 27, 1978
Filed:
Jun. 15, 1977
Stanley J Withers, Berkeley, CA (US);
Ronald L Sturm, San Carlos, CA (US);
Oxford Laboratories Inc., Foster City, CA (US);
Abstract
A micropipettor having an adjustable stop threadedly engaged with an internal reciprocal plunger assembly for defining the stroke length of the plunger and thus of a fluid displacing piston that is attached to the plunger assembly. The adjustable stop is manipulated by operable connection with a volume adjustment knob provided on the outside of the micropipettor body. The plunger carries a coarse volume indicating scale and the volume adjustment knob is provided with a fine volume setting scale. Accidental changes in volume adjustments are avoided by two types of automatic locks: a frictional engagement of the internal volume adjustment mechanism unless the plunger is deliberately placed in a certain position by the operator, and a detent lock of the volume adjustment knob unless the operator deliberately depresses it.