Pump seal with curved backup plate

Details Pump seal with curved backup plate Pump seal with curved backup plate

1985-04-09

1987-01-20

Jones, Larry

Expansible chamber devices

Cylinder detail

Nonmetallic piston contacting portion

277 29, 277152, 277 72FM, 417489, F01B 1102, F04B 704, F02F 1100

Patent

active

046372954

ABSTRACT:
A pump seal is provided for use in a pump suited to move high viscosity and abrasive materials. A piston in the pump has a substantial amount of clearance relative to the cylinders in which it operates with the seal providing substantially the only contact in sealing between the piston and the cylinders. The seal is formed of a relatively soft, elastomeric material which is normally of a plainer, annular shape. Along with a rigid annular ring plate, the elastic ring is sandwiched between the closure member and housing member. The ring plate has a curved surface facing the closure member which serves to backup and support the relatively soft elastic ring under pressure.

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