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. 28, 1990
Filed:
Apr. 14, 1989
Applicant:
Inventors:
John Ashworth, Canton, MI (US);
Thomas Ingve, Redford, MI (US);
Assignee:
Graco Robotics, Inc., Livonia, MI (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01R / ;
U.S. Cl.
CPC ...
239 67 ; 239 72 ; 137-2 ; 1374675 ; 324689 ;
Abstract
A multi-line electronic media barrier or safety system for preventing liquid contamination of air lines, including a capacitance proximity sensor for detecting a foreign undesirable medium such as paint in an air line. When foreign media is detected, a main air valve is closed which in turn closes valves connected in the air lines, thereby blocking passage of air or liquid and protecting pneumatic control apparatus. The media barrier is especially designed for use with automated or robotic paint spray devices utilized in industry.