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Class Information
Number: 175/296
Name: Boring or penetrating the earth > Below-ground (1) hammer, or (2) impact members > Fluid-operated
Description: Apparatus in which (1) the hammer or impact device is acted upon and propelled by a body of fluid to deliver a blow (2) a body of fluid acts directly upon the hammer or impact device, or on holding means therefor to restrain said device against movement, and means to relieve the device or holding means from the influence of the restraining fluid to deliver a blow or (3) a means for holding the hammer or impact device against movement is released by a body of fluid to deliver a blow.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 5207283 |
Reversible bit bearing |
May. 4, 1993 |
| 5193627 |
Apparatus for controlling a ramming device |
Mar. 16, 1993 |
| 5161626 |
Method for embedding lines, anchoring cables, and sinking wells |
Nov. 10, 1992 |
| 5156223 |
Fluid operated vibratory jar with rotating bit |
Oct. 20, 1992 |
| 5154244 |
Transmission sleeve for a down hole hammer |
Oct. 13, 1992 |
| 5148878 |
Ram boring machine |
Sep. 22, 1992 |
| 5143162 |
Device for removing debris from a drillhole |
Sep. 1, 1992 |
| 5139099 |
Excavation tool |
Aug. 18, 1992 |
| 5139096 |
Pneumatic percussion hammers |
Aug. 18, 1992 |
| 5139095 |
Method for removing debris from a drillhole |
Aug. 18, 1992 |
| 5127481 |
Percussion boring machine for destructive replacement of buried pipelines |
Jul. 7, 1992 |
| 5115875 |
Hammer drills for making boreholes |
May. 26, 1992 |
| 5113954 |
Excavation tool |
May. 19, 1992 |
| 5109932 |
Impact borer, connector for embedding lines, anchoring cables, and sinking wells |
May. 5, 1992 |
| 5107944 |
Down hole drills using spent driving fluid for flushing purposes |
Apr. 28, 1992 |
| 5096000 |
Process and apparatus for laying service lines without excavation |
Mar. 17, 1992 |
| 5094303 |
Impact apparatus and process for the control of impact apparatus |
Mar. 10, 1992 |
| 5088568 |
Hydro-mechanical device for underground drilling |
Feb. 18, 1992 |
| 5085284 |
Hybrid pneumatic percussion rock drill |
Feb. 4, 1992 |
| 5056609 |
Valve assembly for a downhole to remove bore hole subsidence |
Oct. 15, 1991 |
| 5031706 |
Pneumopercussive soil penetrating machine |
Jul. 16, 1991 |
| 5014796 |
Down hole drills using spent driving fluid for flushing purposes |
May. 14, 1991 |
| 4964477 |
Pneumatic percussive device |
Oct. 23, 1990 |
| 4958690 |
Drilling device with hydraulic percussion generator for earth drilling purposes |
Sep. 25, 1990 |
| 4958691 |
Fluid operated vibratory jar with rotating bit |
Sep. 25, 1990 |
| 4940097 |
Fluid powered rotary percussion drill with formation disintegration inserts |
Jul. 10, 1990 |
| 4938297 |
Ram boring machine |
Jul. 3, 1990 |
| 4932483 |
Down hole hammer |
Jun. 12, 1990 |
| 4928775 |
Downhole surge valve for earth boring apparatus |
May. 29, 1990 |
| 4921056 |
Hammer drills for making boreholes |
May. 1, 1990 |
| 4913243 |
Percussion drill and method of controlling same |
Apr. 3, 1990 |
| 4890682 |
Apparatus for vibrating a pipe string in a borehole |
Jan. 2, 1990 |
| 4886128 |
Ram boring implement having a movable bit |
Dec. 12, 1989 |
| 4883133 |
Combustion operated drilling apparatus |
Nov. 28, 1989 |
| 4878550 |
Pilot-valve-controlled percussion drilling tool |
Nov. 7, 1989 |
| 4867255 |
Technique for steering a downhole hammer |
Sep. 19, 1989 |
| 4862976 |
Spline drive for percussion drilling tool |
Sep. 5, 1989 |
| 4852669 |
Directional downhole drill apparatus |
Aug. 1, 1989 |
| 4844183 |
Accelerator for fishing jar with hydrostatic assist |
Jul. 4, 1989 |
| 4840237 |
Ram boring implement |
Jun. 20, 1989 |
| 4840238 |
Superposed drilling device |
Jun. 20, 1989 |
| 4819746 |
Reverse circulation down-the-hole hammer drill and bit therefor |
Apr. 11, 1989 |
| 4807709 |
Fluid Powered drilling jar |
Feb. 28, 1989 |
| 4785898 |
Device for making holes in soil |
Nov. 22, 1988 |
| 4771835 |
Downhole hammer |
Sep. 20, 1988 |
| 4722403 |
Annular air-hammer apparatus for drilling holes |
Feb. 2, 1988 |
| 4709768 |
Annular air hammer apparatus for drilling wells |
Dec. 1, 1987 |
| 4705119 |
Annular air-hammer apparatus for drilling holes |
Nov. 10, 1987 |
| 4705118 |
Hammer for use in a bore hole and apparatus for use therewith |
Nov. 10, 1987 |
| 4699223 |
Method and device for percussion earth drilling |
Oct. 13, 1987 |
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