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:
Jun. 16, 1987
Filed:
Mar. 06, 1986
Mark G Gordon, Tustin, CA (US);
Other;
Abstract
Method and apparatus are disclosed for drawing blood from an injection site through an arterial line connected to a fluid supply. The apparatus includes a variable capacity pump mechanism housing having inner walls defining an interior chamber. The housing includes first and second ports connected to a variable capacity interior chamber. A retractable piston is disposed within the housing and is adapted to traverse within the chamber. A piston sealing member is provided about the piston in slidable sealing engagement with the chamber walls to cause fluid to be drawn into the chamber, thereby facilitating the extraction of a blood sample along the arterial line without the need to discharge an initial sample containing disproportionate amounts of supply fluid.