ROLLER CUTTER WITH IMPROVED SEALING
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United States of America Patent
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Issued Date -
Feb 11, 2016
app pub date -
Mar 7, 2014
filing date -
Mar 20, 2013
priority date (Note) -
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status (Latency Note)
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Abstract
A roller cutter intended to be used at a drill head for rotary boring of the front of earth and rock formations, the roller cutter having a centre line and being provided with a hub having rows of crushing members. At least one crushing member has its longitudinal axis at an angle relative to a normal to the centre line. The hub is rotatable in relation to a shaft having shaft spigots. The roller cutter is provided with at least one seal retainer arranged at an axial end of the hub in order to hold a sealing means in position. The hub includes at least one circumferential recess positioned axially inward relative to a radially inward projecting flange in the hub.
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