Patent · US Expired

Pressure unloading apparatus for a diaphragm pump

US4019837A · kind A · utility

7Cited by
5References
2Claims
0Family size

Assignee

Inventor

Key dates

Filing dateMay 30, 1975
Grant dateApr 26, 1977
Priority date
Expiry dateMay 30, 1995

Classification

  • Technology area (CPC F)Mechanical Engineering; Lighting; Heating
  • CPC primaryF04B49/022
  • WIPO fieldEngines, pumps, turbines
  • WIPO sectorMechanical engineering

Abstract

Apparatus is disclosed for unloading excess pressures developed in a hydraulic diaphragm pump, wherein the pressure of the pumped fluid is sensed by a control diaphragm connected to an unloading valve which is placed in a passage connecting the hydraulic displacement chamber with a hydraulic oil reservoir.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.