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:
Jun. 28, 1983
Filed:
Jan. 28, 1981
Rudolf Karliner, Minnetonka, MN (US);
Wagner Spray Tech Corporation, Minneapolis, MN (US);
Abstract
An airless hydraulic diaphragm paint pump having a pumping chamber subdivided by a diaphragm into pumping fluid and pump fluid subchambers with an inlet from a pump fluids storage and an outlet to a pumped fluid utilizer such as a paint spray gun. A bypass port is provided for returning pumped fluid to the source at a low pressure. A pressure release valve in communication with both the outlet and the bypass port is effective to allow bypassing the pumped fluid directly back to the source and to bleed the line between the pumped fluid utilizer and the pump. The valve is actuated by a solenoid actuator and is opened when the pump drive is terminated or manually or in the event of an excessive high pressure.