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:
Aug. 04, 1998
Filed:
Jun. 05, 1995
Larry Lee Young, Arab, AL (US);
Richard Rabenau, Birmingham, AL (US);
Stephen Perry Lisak, Arab, AL (US);
Rowland William Kanner, Guntersville, AL (US);
Atrion Medical Products, Inc., Arab, AL (US);
Abstract
A novel fluid infusion system utilizing a fluid pump device and a syringe is used in an intravenous or infusion application of a liquid product, such as a medication, to a patient. The pump device includes a housing that has a compartment for reception of at least a portion of the plunger of the syringe. A drive component is disposed in the compartment and is relatively movable with respect to the housing for engaging and producing movement of the plunger. A fluid medium is contained within the housing and a relatively movable piston is in operative communication with the fluid medium and a biasing structure is provided for biasing the piston in a first direction to impart a force on the fluid medium. A metering orifice is in communication with the fluid medium and through which the medium can pass upon movement of the piston in the first direction to restrict and control the flow of the medium. Valve structure for the fluid medium permits the rapid return movement of the piston in a second direction opposite the first direction. The piston is operatively associated with the drive component, such that the movement of the piston in the first direction is transferred to the drive component with the metering orifice in effect controlling the rate of movement of the piston and the drive component and correspondingly the movement of the plunger thereby controlling the rate of expulsion of the liquid product from the syringe.