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:
Oct. 12, 1976
Filed:
Jul. 11, 1975
Menachem Tamir, Buffalo Grove, IL (US);
Manuel I Martin, Hoffman Estates, IL (US);
Robert J Magill, San Jose, CA (US);
G. D. Searle & Co., Skokie, IL (US);
Abstract
A dosing apparatus is provided which is adapted to aspirate and dispense a first fluid in predetermined amounts. The apparatus includes an elongated tubular member which is connected at one end to a reversible pump for imparting controlled reverse flow of a second fluid within the tubular member during aspirating and dispensing of the first fluid from the opposite end of the tubular member. Disposed within the tubular member is an element for inhibiting the intermixing of the two fluids. A plurality of such elements, which are vaned and baffle-like, are disposed within the tubular member and arranged in end-to-end relation. The vanes of successive baffle elements project outwardly towards the interior surface of the tubular member and are curved longitudinally in opposite directions whereby the fluid flow past the baffle elements is subject to abrupt changes in directions at each successive baffle member. Disposed within the tubular member and positioned between the aspirating and dispensing end and the endmost baffle element is a deflector piece which deflects the aspirated fluid towards the interior surface of the tubular member before the fluid contacts the baffle elements.