NL7700457A - Pneumatic hammer drill assembly - has valve assembly adapted to open alternative fluid supply paths - Google Patents

Pneumatic hammer drill assembly - has valve assembly adapted to open alternative fluid supply paths

Info

Publication number
NL7700457A
NL7700457A NL7700457A NL7700457A NL7700457A NL 7700457 A NL7700457 A NL 7700457A NL 7700457 A NL7700457 A NL 7700457A NL 7700457 A NL7700457 A NL 7700457A NL 7700457 A NL7700457 A NL 7700457A
Authority
NL
Netherlands
Prior art keywords
valve assembly
fluid supply
piston
casing
supply paths
Prior art date
Application number
NL7700457A
Other languages
Dutch (nl)
Other versions
NL173719C (en
NL173719B (en
Original Assignee
Abraham Gien En Bernard Lionel
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Abraham Gien En Bernard Lionel filed Critical Abraham Gien En Bernard Lionel
Priority to NL7700457A priority Critical patent/NL173719C/en
Publication of NL7700457A publication Critical patent/NL7700457A/en
Publication of NL173719B publication Critical patent/NL173719B/en
Application granted granted Critical
Publication of NL173719C publication Critical patent/NL173719C/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01B—MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
    • F01B11/00—Reciprocating-piston machines or engines without rotary main shaft, e.g. of free-piston type
    • F01B11/04—Engines combined with reciprocatory driven devices, e.g. hammers
    • 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
    • E21B4/00—Drives for drilling, used in the borehole
    • E21B4/06—Down-hole impacting means, e.g. hammers
    • E21B4/14—Fluid operated hammers

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)
  • General Engineering & Computer Science (AREA)
  • Earth Drilling (AREA)

Abstract

The pneumatic percussion machine includes a hollow casing; a valve assembly at one end of the casing; a bit assembly at the other end of the casing; a piston adapted to reciprocate in the casing between the first position in which it is in contact with the bit assembly and a second position in which it is removed from such first position; a first chamber formed between an end of the piston and the valve assembly; a second chamber formed at or towards the other end of the piston; a first fluid supply path through the valve assembly to the first chamber; a second fluid supply path through the valve assembly to the second chamber, such second fluid supply path passing for at least part of its length through the piston; a first fluid discharge path from the first chamber passing, for at least part of its length, between the wall of the casing and the piston, such fluid discharge path being open inparticular positions of the piston along the length of the hollow casing; the arrangement being one in which the valve assembly is adapted, on operation of the machine, to open alternatively the fluid supply paths.
NL7700457A 1977-01-17 1977-01-17 PNEUMATIC IMPACT MACHINE. NL173719C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
NL7700457A NL173719C (en) 1977-01-17 1977-01-17 PNEUMATIC IMPACT MACHINE.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7700457A NL173719C (en) 1977-01-17 1977-01-17 PNEUMATIC IMPACT MACHINE.

Publications (3)

Publication Number Publication Date
NL7700457A true NL7700457A (en) 1978-07-19
NL173719B NL173719B (en) 1983-10-03
NL173719C NL173719C (en) 1984-03-01

Family

ID=19827788

Family Applications (1)

Application Number Title Priority Date Filing Date
NL7700457A NL173719C (en) 1977-01-17 1977-01-17 PNEUMATIC IMPACT MACHINE.

Country Status (1)

Country Link
NL (1) NL173719C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0183874A1 (en) * 1984-12-07 1986-06-11 Friedhelm Schwarz Hydraulic percussion tool

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0183874A1 (en) * 1984-12-07 1986-06-11 Friedhelm Schwarz Hydraulic percussion tool

Also Published As

Publication number Publication date
NL173719C (en) 1984-03-01
NL173719B (en) 1983-10-03

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Legal Events

Date Code Title Description
BB A search report has been drawn up
BC A request for examination has been filed
V1 Lapsed because of non-payment of the annual fee