Patent · US Expired

Laboratory flask stirrer assembly attachable with a nut and bolt

US5326167A · kind A · utility

7Cited by
19References
14Claims
0Family size

Assignee

Inventors

Key dates

Filing dateFeb 23, 1993
Grant dateJul 5, 1994
Priority date—
Expiry dateFeb 23, 2013

Classification

  • Technology area (CPC B)Performing Operations; Transporting
  • CPC primaryB01F27/071
  • WIPO fieldChemical engineering
  • WIPO sectorChemistry

Abstract

A stirring system for stirring contents in a laboratory flask having a round or spherical bottom and a reduced neck includes a stirrer shaft manufactured with a ring at the lower end thereof which permits attachment of a blade with a nut and bolt made of TEFLON material. The nut and bolt prevents the stirrer blade from flipping over during assembly and allows for a controlled tightening force to be applied to ensure that the blade remains in proper stirring position during use. The nut and bolt design permits use of the shaft with any stirrer blade having a keyhole cutout or circular opening. A method of stirring contents in a laboratory flask by attachment of the stirrer blade to the stirrer shaft with a nut and bolt is also disclosed.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.