Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Browse by Category: Main > Construction
Class Information
Number: 175/270
Name: Boring or penetrating the earth > Cutter element laterally shiftable below ground (e.g., expansible) > Cutter element shifted by dropped element
Description: Apparatus in which the laterally movable cutter element is moved laterally by means of a part which is specifically described as being dropped from above ground to an operative position below ground.










Patents under this class:

Patent Number Title Of Patent Date Issued
8205689 Stabilizer and reamer system having extensible blades and bearing pads and method of using same Jun. 26, 2012
7673708 Ball-activated mechanism for controlling the operation of a downhole tool Mar. 9, 2010
6443247 Casing drilling shoe Sep. 3, 2002











 
 
  Recently Added Patents
Interleaving charge pumps for programmable memories
Verbena plant named `Duempsopicha`
Method for the treatment, alleviation of symptoms of, relieving, improving and preventing a cognitive disease, disorder or condition
Performance apparatus and electronic musical instrument
Display screen with graphical user interface
Handheld electronic communication device having sliding display
Stopper, motor, and disk drive apparatus
  Randomly Featured Patents
Loudspeaker for a headset
Database for access control center
Method of automatically filling prescriptions
Preparation of .alpha.,.beta.-aldehydes by aldol condensation
Combined pillow and detachable pad assembly unit
System and method for having a single gateway set-up and maintain local signalling connections
Horseback riding simulation
Jet powered steering system for small boat outboard motors
Parametric coupling device for traveling-waves
Elongate material storing, transporting, and dispensing apparatus