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:
May. 22, 1984
Filed:
Oct. 29, 1982
Kenneth G Karkiewicz, Richmond, VA (US);
Ethyl Molded Products Company, Richmond, VA (US);
Abstract
This invention relates to a device for thoroughly mixing the liquid contents of first and second containers without exposing either the liquid contents or the resultant mixture to outside contamination. The device features a movable pumping diaphragm which traverses a pumping chamber so that the pumping chamber is divided into an upper and lower chamber. In a first position, the diaphragm causes the upper chamber to have a reduced volume while the lower chamber has an increase volume. In a second position, the pumping diaphragm causes the lower chamber to have a decreased volume while the upper chamber has an increased volume. Valving assemblies are utilized in conjunction with both the upper and lower chamber to selectively allow for the ingress and egress of fluids from these chambers dependent upon the position of the pumping diaphragm.