GB191504350A - Improvements in Rock Drills and like Machines. - Google Patents
Improvements in Rock Drills and like Machines.Info
- Publication number
- GB191504350A GB191504350A GB191504350DA GB191504350A GB 191504350 A GB191504350 A GB 191504350A GB 191504350D A GB191504350D A GB 191504350DA GB 191504350 A GB191504350 A GB 191504350A
- Authority
- GB
- United Kingdom
- Prior art keywords
- tool
- rod
- liquid column
- liquid
- impulses
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D9/00—Portable percussive tools with fluid-pressure drive, i.e. driven directly by fluids, e.g. having several percussive tool bits operated simultaneously
- B25D9/06—Means for driving the impulse member
- B25D9/12—Means for driving the impulse member comprising a built-in liquid motor, i.e. the tool being driven by hydraulic pressure
- B25D9/125—Means for driving the impulse member comprising a built-in liquid motor, i.e. the tool being driven by hydraulic pressure driven directly by liquid pressure working with pulses
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Percussive Tools And Related Accessories (AREA)
Abstract
4350. Constantinesco, G., and Haddon, W. March 19. Percussive drills. - Percussive rock drills &c. are operated at a distance from a power generator by means of a series of periodic variations of pressure and volume travelling along a single liquid column, that is by impulses of energy conveyed along a single pipe 1. Fig. 2, to the tool 13 from a generator, by a series of waves due to the elasticity of the liquid column. The liquid column is divided by a spring " condenser " c, Fig. 1, as described in Specifications 9029/13 and 12,438/14, [both in Class 69 (ii), Hydraulic presses &c.], but liquid is allowed to escape therethrough for the purpose of washing out the bore-hole. This leak may be effected by making the reciprocating member c fit loosely in the pipe, or by making it hollow and with closed ends c, which slide in sleeves b, and providing ports f, g, h through which liquid passes when the member c is at the end of its stroke. The impulses are delivered to a piston-rod 3, Fig. 2, which carries the tool 13; the inner end of the rod fits loosely in the casing, so that the washing-water can pass by a passage 16 to a central bore 14. Springs 21, 22 constitute a condenser. A rifled extension 4 of the rod 3 works in a ratchet device 5, 6, whereby rotation of the tool is effected.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB191504350T | 1915-03-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB191504350A true GB191504350A (en) | 1916-03-16 |
Family
ID=32649558
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB191504350D Expired GB191504350A (en) | 1915-03-19 | 1915-03-19 | Improvements in Rock Drills and like Machines. |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB191504350A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7322425B2 (en) | 2003-07-07 | 2008-01-29 | Sandvik Mining And Construction Oy | Method of generating stress pulse in tool by means of pressure fluid operated impact device, and impact device |
-
1915
- 1915-03-19 GB GB191504350D patent/GB191504350A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7322425B2 (en) | 2003-07-07 | 2008-01-29 | Sandvik Mining And Construction Oy | Method of generating stress pulse in tool by means of pressure fluid operated impact device, and impact device |
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