Resources Contact Us Home
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
TRPM8 antagonists and their use in treatments
Power conversion device and method for controlling thereof
Automatic engine oil life determination with a factor for oil quality
Imaging apparatus for calculating a histogram to adjust color balance
Method and apparatus for transmitting and receiving extension information of component carrier in wireless communication system
ZnO green luminescent material and its preparation
Image forming apparatus and information processing apparatus
  Randomly Featured Patents
Planar coil flexion fixture for magnetic resonance imaging and use thereof
Light emitting element with semiconductive phosphor
Key reuse for RDMA virtual address space
Vibratory screen apparatus
Air cell thermal isolation for a memory array formed of a programmable resistive material
Method of treating molten aluminum by removing hydrogen gas and nonmetallic inclusions therefrom
Lighting device including plural optical structures having at least two different refraction indices, and lighting methods
Bandsaw blade deviation detecting apparatus for horizontal bandsaw machines
Process for continuous preparation of diester of oxalic acid
Process for reduction of nitrate and nicotine content of tobacco by microbial treatment