Gate valve for particulate materials
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Sep 12, 1995
Grant Date -
N/A
app pub date -
Nov 7, 1994
filing date -
Nov 7, 1994
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A reciprocating gate valve for controlling the flow of particulate material is provided. The gate valve has a metal valve gate with an angled leading edge and also has a groove in the center of the angled leading edge. The valve body is formed from a metal cover plate that has a plurality of plastic body parts fixed to the cover plate so that the metal valve gate reciprocates between plastic body parts. The plastic body parts are preferably formed of self-lubricating plastic such as nylon or Teflon. The valve body has a rectangular recess which intersects the circular passage through the valve body with the rectangular recess having its long dimension positioned transverse to the direction of movement of the valve gate. The rectangular recess provides space for the particulate material to be moved ahead of the valve gate angled leading edge as the valve gate closes. The notch in the angled leading edge of the valve gate can sever any isolated piece of particulate material that is in a position to block the complete closure of the valve gate.
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