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Construction
Class Information
Number:
175/303
Name:
Boring or penetrating the earth
>
Below-ground (1) hammer, or (2) impact members
>
With releasable means to detachably retain telescoping members against axial reciprocation
>
Condition for release adjustable
> Adjustable below ground
Description:
Apparatus in which the adjustment may be effected while the device is in position to perform its intended function within the bore.
Patents under this class:
Patent Number
Title Of Patent
Date Issued
7281575
Field adjustable impact jar
Oct. 16, 2007
7111678
Field adjustable impact jar
Sep. 26, 2006
6988551
Jar with adjustable trigger load
Jan. 24, 2006
4919219
Remotely adjustable fishing jar
Apr. 24, 1990
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