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Class Information
Number: 173/9
Name: Tool driving or impacting > Automatic control of power operated means > Tool advance causing or controlling means > Responsive to torque or speed condition of drive > Fluid flow or pressure operated advance means
Description: Apparatus in which the means which causes or controls forward movement of the tool comprises a motor operated by fluid.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7328753 |
Hydraulic breaking hammer with lubricated implement guide sleeve |
Feb. 12, 2008 |
| 7198117 |
Method and arrangement for controlling percussion rock drilling |
Apr. 3, 2007 |
| 6883620 |
Device for hydraulic power supply of a rotary apparatus for percussive drilling |
Apr. 26, 2005 |
| 6550544 |
Rock drilling device |
Apr. 22, 2003 |
| 6505689 |
Arrangement for controlling rock drilling |
Jan. 14, 2003 |
| RE37923 |
Hydraulic circuit for automatic control of a horizontal boring machine |
Dec. 10, 2002 |
| 6318478 |
Damper pressure control apparatus for hydraulic rock drill |
Nov. 20, 2001 |
| 5564455 |
Hydraulic circuit for automatic control of a horizontal boring machine |
Oct. 15, 1996 |
| 5168937 |
Drill feed control utilizing a variable overcenter valve |
Dec. 8, 1992 |
| 4838362 |
Apparatus for manipulating a tool |
Jun. 13, 1989 |
| 4711090 |
Method of and device for adjusting the feed movement of a drill rod for drilling a rock |
Dec. 8, 1987 |
| 4660656 |
Method and apparatus for controlling the rotational torque of a drill bit |
Apr. 28, 1987 |
| 4503918 |
Rock drilling apparatus |
Mar. 12, 1985 |
| 4491186 |
Automatic drilling process and apparatus |
Jan. 1, 1985 |
| 4440236 |
Hydraulic control system for a rock drill |
Apr. 3, 1984 |
| 4322113 |
Excavating machines for excavating rock and minerals having first and second alternative modes of control |
Mar. 30, 1982 |
| 4275793 |
Automatic control system for rock drills |
Jun. 30, 1981 |
| 4246973 |
Controls for hydraulic percussion drill |
Jan. 27, 1981 |
| 4195699 |
Drilling optimization searching and control method |
Apr. 1, 1980 |
| 4165789 |
Drilling optimization searching and control apparatus |
Aug. 28, 1979 |
| 4064950 |
Hydraulic drilling machine |
Dec. 27, 1977 |
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