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:
Mar. 17, 1992
Filed:
Oct. 11, 1989
Heinrich Griebel, Friedrichshafen, DE;
Ewald Kille, Friedrichshafen, DE;
Manfred Kistler, Markdorf, DE;
J. Wagner GmbH, , DE;
Abstract
An apparatus for conveying paints is connectible via a supply passage to a reservoir and is connectible via a feed passage to an application device. The apparatus includes a diaphragm pump mounted in a closed housing and provided with an admission valve and a discharge valve. The diaphragm pump is driveable with an electric motor that can be switched by a manometric switch dependent on conveying pressure. The admission valve and the discharge valve are commonly arranged in a pump head and are held by a supporting element that is detachably connected to the pump head. Further, the discharge valve is located upsteam of a pressurized chamber that is connected to the feed passage and is also located in the pump head. Variations in feed passage pressure cause variations in the volume of the pressurized chamber by flexing a control diaphragm. The control diaphragm acts on an adjustment element to actuate a control switch. The invention provides an apparatus that is compact, reliable, and easy to manufacture. The apparatus operates at low feed pressures and noise levels. Further, the torque of the drive motor, preferably a split-pole motor, can be easily varied to suit the required conveying power of the diaphragm pump. The invention further permits reproducible adjustment of the manometric switch, and allows quick and easy cleaning of the admission and discharge valves without the need for special tools or disassembly of the housing.