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
Device for preparing a body fluid for a bacteriological analysis
Toilet bowl
Electronic multiparty accounts receivable and accounts payable system
Optical article including an antireflecting coating having antifog properties and process for making same
Methods and apparatus for processing audio signals
Vehicle battery with cell balancing current paths and method of charging the same
Distortion compensation device, distortion compensation method, and radio transmitter
  Randomly Featured Patents
Device and method for operating a tool relative to bone tissue and detecting neural elements
Childs chair with ornamental timing system
Method for expeditiously processing a sodium-potassium-cesium-antimony photocathode
Apparatus for cutting strip material
Carrier coating processes
Skid control system
Thermal performance matched current limiting circuit, and battery using same
Novel acyloxamides and plant growth regulant compositions
Thyrister semiconductor device
Image-receiving sheet for thermal-transfer recording medium