Pipette

Abstract

A pipette which is formed within a mold in which a raw material of a given tubing thickness is employed, the tubing to be of a plastic material, the tubing placed within the mold and caused to be raised in temperature until pliable, the plastic tube caused to be expanded against the surface of the mold, the drawing tube and the container section of the pipette being formed of a thickness to make such substantially rigid, an enlarged bulbous section connected to the container section, the thickness of the bulbous section to be substantially thinner than the container section and the drawing tube section whereby the bulbous portion may be readily manually compressed and then permitted to retract back to its at rest state causing a drawing of liquid through the drawing tube section into the container section.

What is claimed: 
     
       1. A single piece pipette formed in an integral manner of plastic material, said pipette comprising: a drawing tube section adapted to draw fluid from a vessel;   a container portion connected to said drawing tube, said drawing tube having an opening therethrough communicating with an enlarged interior chamber located within said container portion, both said container portion and said drawing tube being .[.formed.]. substantially rigid;   a bulbous .Iadd.imperforate .Iaddend.portion connected to the free end of said container portion, said bulbous portion being readily felxible so that it is capable of being squeezed to apply an air pressure force or a vacuum within said chamber of said container portion;   .[.the wall thickness of said container portion being approximately one-half the wall thickness of said drawing tube, the wall thickness of said bulbous portion being approximately one-half the wall thickness of said container portion;.]..Iadd.the wall thickness of said container being less than the wall thickness of said drawing tube and greater than the wall thickness of said bulbous portion .Iaddend.and   means interconnecting said bulbous portion and said container portion for preventing local collapse of said container portion during squeezing of said bulbous portion.   
     
     
       2. The pipette as defined in claim 1 wherein: said means comprises a rigid wall disposed at an angle to both the wall of said container portion and the wall of said bulbous portion.