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Class Information
Number: 175/238
Name: Boring or penetrating the earth > With means movable relative to tool below ground to stop flow toward bore bottom > Flow-stopping means includes relatively movable cutter element
Description: Apparatus in which at least part of the relatively movable, flow stopping means comprises a cutter element.

Patents under this class:

Patent Number Title Of Patent Date Issued
6739412 Pile boring tools May. 25, 2004
4323019 Method and apparatus for planting seedlings Apr. 6, 1982
4265036 Bucket dredging and conveying system May. 5, 1981
4023629 Toggle actuated underreamer May. 17, 1977
3965999 Drilling grab for pile foundations and well boreholes Jun. 29, 1976

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