Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Browse by Category: Main > Material Science
Class Information
Number: 299/22
Name: Mining or in situ disintegration of hard material > Expansible breaking-down devices > Fluid-pressed element > Piston
Description: Apparatus in which one fluid pressed element comprises a piston.










Patents under this class:

Patent Number Title Of Patent Date Issued
8100479 Miner acoustic communication and location system Jan. 24, 2012
6948573 Rock breaker tool Sep. 27, 2005
6213212 Spherical stemming plug and method of use Apr. 10, 2001
5015039 Hydraulically actuated mechanical rock excavator May. 14, 1991
4571002 Hydraulic rock splitter Feb. 18, 1986
4566736 Apparatus for mechanically breaking up rock Jan. 28, 1986
4474410 Power-driven, wedge-operated rock splitter Oct. 2, 1984
4311343 Apparatus for breaking rock or concrete Jan. 19, 1982
4252375 Wear or thrust plates for hydraulic rock splitting apparatus Feb. 24, 1981
4215901 Hydraulically actuated tool for mechanically splitting rock-like material Aug. 5, 1980
4114951 Hydraulically actuated tool for mechanically splitting rock-like material Sep. 19, 1978
4114950 Method and apparatus for breaking a hard compact material such as rock or concrete Sep. 19, 1978
4099784 Method and apparatus for breaking hard compact material such as rock Jul. 11, 1978
4094181 Method in destructing chills and a device for carrying out the method Jun. 13, 1978
4072353 Thrust-impact rock-splitter Feb. 7, 1978
4042280 Method of breaking up objects Aug. 16, 1977
4040669 Self propelled excavating vehicle Aug. 9, 1977
4026602 Apparatus for mechanically breaking up stone or reinforced concrete May. 31, 1977
3995906 Rock-splitting apparatus Dec. 7, 1976
3957309 Apparatus for mechanically breaking up rock May. 18, 1976
3931997 Method for breaking concrete structures Jan. 13, 1976











 
 
  Recently Added Patents
Early kill removal graphics processing system and method
Delay interferometer using magneto-optic effect of a variable faraday rotator
Protective vest
Die packages and systems having the die packages
Methods and systems for assessing sales activity of a merchant
Stack and folding-typed electrode assembly and method for preparation of the same
System and method for converting biomass to ethanol via syngas
  Randomly Featured Patents
System for separating paraffin from oil in refineries
High frequency heating apparatus
Process using a titanium-containing silicon oxide catalyst
Method for making a semiconductor device with strain enhancement
System and method for sequencing and performing very high speed software downloads concurrent with system testing in an automated production environment
Analytical test card
Apparatus for controlling I/O strobe signal in semiconductor memory apparatus
Pyrotechnic inflator with reduced extent filter and cartridge charges
Air seal retention means
Method and apparatus for positioning a reference frame