EP0408517A3 - Control device for slide valves in oil-operated hammers - Google Patents

Control device for slide valves in oil-operated hammers Download PDF

Info

Publication number
EP0408517A3
EP0408517A3 EP19900830180 EP90830180A EP0408517A3 EP 0408517 A3 EP0408517 A3 EP 0408517A3 EP 19900830180 EP19900830180 EP 19900830180 EP 90830180 A EP90830180 A EP 90830180A EP 0408517 A3 EP0408517 A3 EP 0408517A3
Authority
EP
European Patent Office
Prior art keywords
oil
control device
slide valves
operated hammers
hammers
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.)
Withdrawn
Application number
EP19900830180
Other versions
EP0408517A2 (en
Inventor
Renato Damiano
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ROTAIR SpA
Original Assignee
ROTAIR SpA
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 ROTAIR SpA filed Critical ROTAIR SpA
Publication of EP0408517A2 publication Critical patent/EP0408517A2/en
Publication of EP0408517A3 publication Critical patent/EP0408517A3/en
Withdrawn legal-status Critical Current

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
    • B25D9/14—Control devices for the reciprocating piston
    • B25D9/145—Control devices for the reciprocating piston for hydraulically actuated hammers having an accumulator

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
EP19900830180 1989-07-14 1990-04-27 Control device for slide valves in oil-operated hammers Withdrawn EP0408517A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT8921177A IT1230342B (en) 1989-07-14 1989-07-14 CONTROL DEVICE FOR DISTRIBUTION VALVES IN HYDRAULIC HAMMERS.
IT2117789 1989-07-14

Publications (2)

Publication Number Publication Date
EP0408517A2 EP0408517A2 (en) 1991-01-16
EP0408517A3 true EP0408517A3 (en) 1991-06-05

Family

ID=11177937

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900830180 Withdrawn EP0408517A3 (en) 1989-07-14 1990-04-27 Control device for slide valves in oil-operated hammers

Country Status (2)

Country Link
EP (1) EP0408517A3 (en)
IT (1) IT1230342B (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE152011C (en) *
DE388335C (en) * 1924-01-11 Ernst Rehfeld Compressed air tool with a valve that controls the exhaust for both the working stroke and the return stroke and is provided with four control surfaces
US1629845A (en) * 1925-05-23 1927-05-24 Chicago Pneumatic Tool Co Pneumatic percussive tool
US1832432A (en) * 1928-10-01 1931-11-17 Chicago Pneumatic Tool Co Pneumatic hammer
US1895153A (en) * 1932-09-07 1933-01-24 Cleveland Rock Drill Co Valve for rock drills
DE2643483B2 (en) * 1975-10-20 1980-02-07 Oy Tampella Ab, Tampere (Finnland) Hydraulic impact device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE152011C (en) *
DE388335C (en) * 1924-01-11 Ernst Rehfeld Compressed air tool with a valve that controls the exhaust for both the working stroke and the return stroke and is provided with four control surfaces
US1629845A (en) * 1925-05-23 1927-05-24 Chicago Pneumatic Tool Co Pneumatic percussive tool
US1832432A (en) * 1928-10-01 1931-11-17 Chicago Pneumatic Tool Co Pneumatic hammer
US1895153A (en) * 1932-09-07 1933-01-24 Cleveland Rock Drill Co Valve for rock drills
DE2643483B2 (en) * 1975-10-20 1980-02-07 Oy Tampella Ab, Tampere (Finnland) Hydraulic impact device

Also Published As

Publication number Publication date
EP0408517A2 (en) 1991-01-16
IT1230342B (en) 1991-10-18
IT8921177A0 (en) 1989-07-14

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