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. 14, 1989
Filed:
Aug. 24, 1987
James G Skakoon, Melrose, MA (US);
Philip S Sleeman, Allston, MA (US);
C. R. Bard, Inc., Murray Hill, NJ (US);
Abstract
Drive means for a small, lightweight, easily operated syringe infusion pump. A syringe is secured in a holder and the syringe plunger is moved by a pusher block of the drive means. The pusher block is advanced to the syringe plunger by squeezing a finger tab. This simultaneously decouples the pusher block from the internal drive and opens the antisiphon catch to allow quick and easy set-up. The pusher block is moved by the engagement of a floating halfnut on a threaded leadscrew. A force is applied to the halfnut by the block substantially near the midpoint of the leadscrew thereby greatly reducing force mechanisms that attempt to separate the leadscrew and halfnut. A relatively light first biasing means is on the block for applying a relatively small force between the halfnut and the leadscrew.