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:
Jul. 04, 1995
Filed:
Aug. 11, 1993
Applicant:
Inventors:
Paul G Conley, St. Charles, MO (US);
Daniel L Williams, Jr, St. Louis, MO (US);
Peter F Appelbaum, Ballwin, MO (US);
Assignee:
American Cyanamid Company, Wayne, NJ (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A61M / ; A61F / ;
U.S. Cl.
CPC ...
604 65 ; 604 51 ;
Abstract
An aspiration control system includes a proportional control valve and a motor, for driving a vacuum pump, which are controlled by a system controller in accordance with input commands to provide a precise, continuously variable vacuum or negative pressure within a vacuum chamber and surgical handpiece. A pressure transducer samples the vacuum output and produces a signal which is fed to the system controller. The signal is compared with an input command, and the motor speed and valve orifice size are coordinated to control the vacuum level.