Diaphragm pump with reinforced diaphragm

US5145336A · kind A · utility

Assignee

• KNF Neuberger GmbH · DE

Inventors

• Erich Becker · Springe, DE
• Heinz Riedlinger · Glückstadt, DE

Key dates

• Filing date: Mar 4, 1991
• Grant date: Sep 8, 1992
• Expiry date: Mar 4, 2011

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F04B43/0054
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A diaphragm pump wherein the marginal portion of a contoured diaphragm is clamped between the cover and the case of the pump housing and the reinforced central portion of the diaphragm is reciprocated toward and away from the inner side of the cover by the connecting rod of a crank drive. The front side of the diaphragm and the inner side of the cover define a variable-volume pumping chamber which receives a fluid medium by way of an inlet and discharges the aspirated fluid medium by way of an outlet in the cover. The diaphragm has an intermediate portion which connects the central and marginal portions and is provided with an annular flexure zone including an annular protuberance at the rear side of the diaphragm. The intermediate portion is further provided with reinforcing and stabilizing ribs which are disposed substantially radially of the central portion and extend between the protuberance and the central portion as well as between the protuberance and the marginal portion at the rear side of the diaphragm. The protuberance cooperates with the ribs to ensure that the front side of the intermediate portion of the diaphragm more accurately conforms to the adjacent portion of th…