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:
Jan. 10, 1984
Filed:
Jul. 01, 1981
Charles D Williams, Rolling Hills Estate, CA (US);
Marquest Medical Products, Inc., Englewood, CO (US);
Abstract
A syringe for drawing gas-free blood samples is disclosed having a sliding assembly operatively connected to an elongated hollow plunger rod, both the sliding assembly and the plunger rod slideably received within the interior of the tubular body, which is connected to an hypodermic needle. The sliding assembly has longitudinal grooves formed along a portion of the length therein which are in fluid communication with inwardly directed smaller cross section radial channels formed in the sliding assembly. The channels are in further fluid communication with a passageway along the longitudinal axis of the sliding assembly and the hollow elongated plunger. Means for preventing the passage of air back into the syringe once the blood level has reached that position are provided. Means for sealing the blood into the syringe are also provided.