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. 14, 2003
Filed:
Mar. 19, 2001
Applicant:
Inventor:
William Curtis Kottke, Fogelsville, PA (US);
Assignee:
Air Products and Chemicals, Inc., Allentown, PA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F04B 1/700 ;
U.S. Cl.
CPC ...
F04B 1/700 ;
Abstract
A reciprocating pump includes a cylinder with a closed interior compartment; a piston assembly which is moveably mounted within the compartment for reciprocating movement; a linear magnetic drive generates a linearly moving magnetic field for moving the piston assembly; a sealing member between the cylinder and the piston assembly to divide the interior compartment of the cylinder into a dispensing chamber and a reservoir chamber; and an energy storage and release media. In certain preferred embodiments, the pumps are hermetic and the energy storage and release media includes a gaseous substance in the reservoir chamber.