Operating head with phased fluid delivery
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United States of America Patent
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-
Aug 1, 1989
Grant Date -
N/A
app pub date -
Nov 20, 1987
filing date -
May 28, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Operating head assembly, e.g. cutter head of a coal or other mining machine having provision for feeding a supply of water or other fluid to the head during operation has provision for phasing the fluid delivery to limit it to the zone about the head in which the cutting action is taking place dependent on the direction of movement of the head. Delivery jets of the head are fed through individual valve units (22) each having an independently operable hydraulic or other actuator (28), the power input thereto being controlled by apertured timing faces (36, 38) on co-acting parts of the head (11) and body (10), power feed through the timing faces being controlled e.g. in correspondence to the position of change-over valve (44, 46) operating in response to controls which direct movement of the head. In an alternative construction the valve units are actuated mechanically by a camming formation which can be indexed depending on the direction of movement.
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