James J Walters

US Patent:

41981936, Apr 15, 1980

Filed:

May 12, 1978

Appl. No.:

5/905162

Inventors:

Robert E. Westerlund - Mequon WI
James F. Walters - Sussex WI

International Classification:

F04B 1502
F04B 700

US Classification:

417517

Abstract:

A pivotal pipe valve unit for concrete supply hoppers having a pair of concrete pumps of the piston-cylinder type which includes a shuttle valve pipe mounted within the hopper for pivoting about a discharge line. The inlet end is spaced slightly from a wear plate which encompasses the cylinder openings to the hopper and is pivoted for alternate alignment with the discharge opening from the pump cylinders. An outer base member is secured to the inlet end and has an annular recess receiving a wear ring. A hydraulic source is coupled to the chamber and creates a pressurized liquid backing of the ring. An annular seal with a metal backing is located to the backside of the ring. An accumulator tank is connected to the hydraulic supply system to firmly hold the ring in sliding sealing engagement with the wear plate with a cushioned type support. The wear ring is slightly thinner than the annular recess and may tilt such that the ring and wear plate sealing surfaces remain parallel. O-ring seals between the periphery of the ring and recess walls prevent the abrasive concrete from entering the chamber.

Address:

1308 Rockridge Rd APT 118, Waukesha, WI 53188

VIN:

2G1WU58R579239664

Make:

CHEVROLET

Model:

IMPALA

Year:

2007