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:
Jan. 08, 1991
Filed:
Jun. 20, 1989
Ewald Kille, Friedrichshafen, DE;
Heinrich Griebel, Friedrichshafen, DE;
J. Wagner, GmbH, , DE;
Abstract
A device for controlling the quantity of a medium, such as paint, lacquer or adhesive emerging from a discharge nozzle of an equipment, such as a spray gun, which device includes a delivery chamber extending between the discharge nozzle and a pump housing which has a pump chamber connected at one end by an outlet valve to the delivery chamber and receives a reciprocating pump piston, with the delivery chamber including a control arrangement that will adjust the quantity of the medium flowing through the discharge nozzle and also prevent a dribble from the end of the nozzle during a return stroke of the pump piston. The control arrangement includes a control sleeve which telescopically receives the control piston that moves with the valve member of the outlet valve relative to the sleeve and the sleeve and control piston have a flow restricting arrangement, such as formed by a groove having a different cross sectional size in the axial direction so that the size of the opening will change as the control piston moves relative to the control sleeve.