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:
Feb. 06, 2007
Filed:
Feb. 09, 2005
Theodore W. Jagger, White Bear Lake, MN (US);
Nicholas P. Van Brunt, White Bear Lake, MN (US);
John A. Kivisto, Oak Grove, MN (US);
Perry B. Lonnes, White Bear Lake, MN (US);
Theodore W. Jagger, White Bear Lake, MN (US);
Nicholas P. Van Brunt, White Bear Lake, MN (US);
John A. Kivisto, Oak Grove, MN (US);
Perry B. Lonnes, White Bear Lake, MN (US);
VBOX, Incorporated, White Bear Lake, MN (US);
Abstract
A product pump for pumping separated product gas from an oxygen concentrator which produces oxygen-rich product gas by utilizing a vacuum swing adsorption (VSA) process. The oxygen concentrator comprises a cartridge containing an adsorbent material for separating the product gas from ambient air, a vacuum pump which provides a vacuum source, a valve for selectively connecting the vacuum pump to the cartridge and product pump, and a reservoir. The product pump comprises a pumping chamber having a product gas inlet and a product gas outlet, a piston movable in the chamber, a vacuum inlet in the chamber on an opposite side of the piston from the product gas inlet and outlet for providing a vacuum to cause the piston to draw product gas through the product gas inlet into the chamber, and a spring for providing a spring force to force the product gas out the product gas outlet.