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Class Information
Number: 299/23
Name: Mining or in situ disintegration of hard material > Expansible breaking-down devices > Wedge
Description: Apparatus in which the device comprises relatively movable elements, and an inclined face on one element cooperates with a face on another element to generate expansive pressure.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7188910 |
Crushing structure of crusher |
Mar. 13, 2007 |
| 6948573 |
Rock breaker tool |
Sep. 27, 2005 |
| 5398998 |
Pressure actuated fracture device |
Mar. 21, 1995 |
| 5076374 |
Drilling device with an impact-rotation tool |
Dec. 31, 1991 |
| 5020859 |
Apparatus for disintegrating monolythic entities |
Jun. 4, 1991 |
| 5015039 |
Hydraulically actuated mechanical rock excavator |
May. 14, 1991 |
| 5000517 |
Powered member for splitting rock and other bodies |
Mar. 19, 1991 |
| 4871212 |
Device for building up directional force |
Oct. 3, 1989 |
| 4865391 |
Apparatus for building-up bursting forces |
Sep. 12, 1989 |
| 4790602 |
Fluid actuated apparatus for mechanically splitting rock-like material |
Dec. 13, 1988 |
| 4781418 |
Fluid actuated apparatus for mechanically splitting rock-like material |
Nov. 1, 1988 |
| 4690460 |
Power unit |
Sep. 1, 1987 |
| 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 |
| 4299347 |
Device for removal of casting deadhead by hydraulic wedge |
Nov. 10, 1981 |
| 4273383 |
Mineral winning machines |
Jun. 16, 1981 |
| 4254808 |
Wedging apparatus useful for log splitting |
Mar. 10, 1981 |
| 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 |
| 4190293 |
Rock splitting attachment for a breaking hammer |
Feb. 26, 1980 |
| 4168862 |
Wear or thrust plates for hydraulic rock splitting apparatus |
Sep. 25, 1979 |
| 4152028 |
Expansible apparatus for removing the surface layer from a concrete object |
May. 1, 1979 |
| 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 |
| 4071095 |
Methods of and apparatus for winning reef |
Jan. 31, 1978 |
| 4026602 |
Apparatus for mechanically breaking up stone or reinforced concrete |
May. 31, 1977 |
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