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:
Apr. 09, 2002
Filed:
Aug. 04, 1997
Anatole J. Sipin, New York, NY (US);
Other;
Abstract
A continuous fluid injection pump delivers a constant flow of fluid under variable loads. This pump includes a housing with an inlet, and outlet and a bore, an inlet line between the housing inlet and the bore, an outlet line between the housing outlet and the bore, a piston free to reciprocate the piston within the bore; a device to reciprocate the piston in a suction stroke and a pressure stroke, an inlet valve in the inlet line, the inlet valve being open when the piston is in a suction stroke to draw fluid into the bore through the inlet line, and closed when the piston is in said pressure stroke, an outlet valve in the outlet line, the outlet valve being open when said piston is in the pressure stroke to expell fluid from the bore into the outlet line, and closed when the piston is in said suction stroke, a sliding seal in contact with the piston to prevent fluid leakage, a flexible seal between the sliding seal and the reciprocating device, the flexible seal is connected at one end to the piston and at the other end to the housing to create an interior volume that isolates the fluid from the environment and prevents bacterial contamination.