GB815990A - Improvements in and relating to percussion devices - Google Patents
Improvements in and relating to percussion devicesInfo
- Publication number
- GB815990A GB815990A GB36381/55A GB3638155A GB815990A GB 815990 A GB815990 A GB 815990A GB 36381/55 A GB36381/55 A GB 36381/55A GB 3638155 A GB3638155 A GB 3638155A GB 815990 A GB815990 A GB 815990A
- Authority
- GB
- United Kingdom
- Prior art keywords
- piston
- auxiliary
- return
- cylinder
- valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000009527 percussion Methods 0.000 title 1
- 238000002485 combustion reaction Methods 0.000 abstract 5
- 229910000831 Steel Inorganic materials 0.000 abstract 1
- 230000006835 compression Effects 0.000 abstract 1
- 238000007906 compression Methods 0.000 abstract 1
- 239000010959 steel Substances 0.000 abstract 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B1/00—Percussion drilling
- E21B1/12—Percussion drilling with a reciprocating impulse member
- E21B1/24—Percussion drilling with a reciprocating impulse member the impulse member being a piston driven directly by fluid pressure
- E21B1/30—Percussion drilling with a reciprocating impulse member the impulse member being a piston driven directly by fluid pressure by air, steam or gas pressure
- E21B1/32—Percussion drilling with a reciprocating impulse member the impulse member being a piston driven directly by fluid pressure by air, steam or gas pressure working with pulses
- E21B1/34—Percussion drilling with a reciprocating impulse member the impulse member being a piston driven directly by fluid pressure by air, steam or gas pressure working with pulses the impulse member being a piston of an internal-combustion engine
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Portable Nailing Machines And Staplers (AREA)
Abstract
815,990. Percussive tools. BERGMAN, G. A. Dec. 19, 1955 [May 17, 1955], No. 36381/55. Class 124. A percussive tool operated by internal combustion having a free piston provided with an auxiliary piston mounted in an auxiliary cylinder connected to the combustion cylinder has, at or near the end wall of the auxiliary cylinder remote from the combustion cylinder, a non- return valve connected to atmosphere, the valve being loaded to open when the pressure in the auxiliary cylinder is greater than that normally required to return the piston. As shown, a striking piston 10 has an auxiliary piston 16 of larger diameter operating in a cylinder 18 which has a non-return valve 46 connected to the combustion chamber 20 by a channel 44 to supply pressure to return the piston 10 after a working stroke. A non-return valve 52 is mounted in the wall of the auxiliary chamber near or at the end remote from the combustion chamber and is so loaded that it opens to atmosphere if the pressure in the space 42 rises above that normally required to return the piston 10. The gas producing the return stroke to the piston is released to atmosphere by a non-return valve 60 situated in the upper part of the auxiliary cylinder wall, which valve also releases pressure due to compression of air drawn into the chamber 50 above the auxiliary piston during the working stroke. The drill steel may be rotated by a mechanism 40 which may be rendered inoperative.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE815990X | 1955-05-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB815990A true GB815990A (en) | 1959-07-08 |
Family
ID=20345521
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB36381/55A Expired GB815990A (en) | 1955-05-17 | 1955-12-19 | Improvements in and relating to percussion devices |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB815990A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2528104A1 (en) * | 1982-06-04 | 1983-12-09 | Stenuick Freres | HAMMER OF DRILLING |
-
1955
- 1955-12-19 GB GB36381/55A patent/GB815990A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2528104A1 (en) * | 1982-06-04 | 1983-12-09 | Stenuick Freres | HAMMER OF DRILLING |
| EP0096639A1 (en) * | 1982-06-04 | 1983-12-21 | Stenuick Freres S.A. | Drilling hammer |
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