Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Browse by Category: Main > Construction
Class Information
Number: 175/4.58
Name: Boring or penetrating the earth > Boring with explosion in inaccessible hole > Projectile forms bore > With means to initially restrain projectile for pressure build-up
Description: Subject matter directed to means which are provided to temporarily hold back the missile at the time of firing the explosive charge so as to build up pressure behind the missile and propel the missile with high initial acceleration when the holding means is overcome.










Patents under this class:

Patent Number Title Of Patent Date Issued
6467387 Apparatus and method for propelling a data sensing apparatus into a subsurface formation Oct. 22, 2002
6148730 Method and apparatus for controlled small-charge blasting by pressurization of the bottom of a drill hole Nov. 21, 2000
6035784 Method and apparatus for controlled small-charge blasting of hard rock and concrete by explosive pressurization of the bottom of a drill hole Mar. 14, 2000
5810098 Method of breaking slabs and blocks of rock from rock formations and explosive shock transmitting and moderating composition for use therein Sep. 22, 1998
4648470 Firing head for a tubing conveyed perforating gun Mar. 10, 1987











 
 
  Recently Added Patents
LCD driving circuit in which shift register units are driven by a first clock signal of fixed duty/amplitude and a second clock signal of variable duty/amplitude
Copolymer for positive type lithography, polymerization initiator used in production of said copolymer, and composition for semiconductor lithography
Resin composition and display device using the same
Multi-protocol data transfers
Field of view matching in a visual prosthesis
Auto-aligning spectroscopy system
Trash receptacle
  Randomly Featured Patents
Method of and device for preserving biological and medical action of substances based on electrical charge and/or state
Label stacker for a rotary machine/apparatus
Cable clip
Silent chain
Sprinkler system having individual multi-mode sprinkler heads with convenient pressure reading and adjustment
Novel organosilicon compound
Method and apparatus for controlling an implement
Fret
Consumables container
Radiation emitting semiconductor device