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:
Feb. 02, 1988
Filed:
May. 29, 1986
Duane D Krohn, West Minster, CO (US);
Graco Inc., Minneapolis, MN (US);
Abstract
A diaphragm pump is provided for pumping paint and similar substances at relatively elevated pressures (300 psi). A pressure sensor is provided for operating the pump in order to maintain the desired pressure. The pressure sensor is located adjacently first outlet passage and is provided with a deflector which deflects the fluid in the outlet passage over the surface of the sensor diaphragm. By providing continuous flow over the face of the sensor diaphragm, paint and similar substances are prevented from drying and/or clogging thereby preventing erratic operation or failure of the device. The connecting rod which is attached to the diaphragm has an outwardly extending and downwardly tapering support surface which supports the diaphragm when under the elevated pressures of which this unit is capable of operation. An upper support member is also provided for further support.