FR2398581A1 - Valve for pneumatic drill - has inset trigger displacing piston rod which pivots conical plug located in air feed pipe - Google Patents

Valve for pneumatic drill - has inset trigger displacing piston rod which pivots conical plug located in air feed pipe

Info

Publication number
FR2398581A1
FR2398581A1 FR7724127A FR7724127A FR2398581A1 FR 2398581 A1 FR2398581 A1 FR 2398581A1 FR 7724127 A FR7724127 A FR 7724127A FR 7724127 A FR7724127 A FR 7724127A FR 2398581 A1 FR2398581 A1 FR 2398581A1
Authority
FR
France
Prior art keywords
pivots
trigger
piston rod
feed pipe
inset
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.)
Granted
Application number
FR7724127A
Other languages
French (fr)
Other versions
FR2398581B1 (en
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.)
Maco Meudon SA
Original Assignee
Maco Meudon SA
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 Maco Meudon SA filed Critical Maco Meudon SA
Priority to FR7724127A priority Critical patent/FR2398581A1/en
Publication of FR2398581A1 publication Critical patent/FR2398581A1/en
Application granted granted Critical
Publication of FR2398581B1 publication Critical patent/FR2398581B1/fr
Granted legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D17/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D17/04—Handles; Handle mountings
    • 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
    • B25D9/16—Valve arrangements therefor
    • B25D9/24—Valve arrangements therefor involving a rocking-plate type valve

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Percussive Tools And Related Accessories (AREA)

Abstract

The trigger-operated valve may be incorporated in the handle (3) of a pneumatic drill and controls the incoming supply (25) of compressed air. The handle is of deformable material and has a slot-mouthed cavity (5) locating the trigger (6). The trigger floats and pivots within the cavity, is forcefully installed through the slot-mouth, and is depressed to displace a piston rod (8) which pivots a plug (10). The plug may be of a truncated cone form and locates in the feed pipe (9) at an axial reduction in dia. effected by a radial step. The plug end of largest dia. has a concentric demi-round section circular lip (14) which bears on the annular faces of the step to seal the inlet (15).
FR7724127A 1977-07-29 1977-07-29 Valve for pneumatic drill - has inset trigger displacing piston rod which pivots conical plug located in air feed pipe Granted FR2398581A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7724127A FR2398581A1 (en) 1977-07-29 1977-07-29 Valve for pneumatic drill - has inset trigger displacing piston rod which pivots conical plug located in air feed pipe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7724127A FR2398581A1 (en) 1977-07-29 1977-07-29 Valve for pneumatic drill - has inset trigger displacing piston rod which pivots conical plug located in air feed pipe

Publications (2)

Publication Number Publication Date
FR2398581A1 true FR2398581A1 (en) 1979-02-23
FR2398581B1 FR2398581B1 (en) 1983-01-07

Family

ID=9194262

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7724127A Granted FR2398581A1 (en) 1977-07-29 1977-07-29 Valve for pneumatic drill - has inset trigger displacing piston rod which pivots conical plug located in air feed pipe

Country Status (1)

Country Link
FR (1) FR2398581A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4258799A (en) * 1979-11-27 1981-03-31 Dresser Industries, Inc. Inlet control valve

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1006378A (en) * 1943-01-15 1952-04-22 Hauhinco Maschf Valve operated pneumatic hammer
FR1183912A (en) * 1957-10-04 1959-07-15 Hauhinco Maschf Compressed air hammer with elastic handle absorbs shocks and vibrations
FR2154036A5 (en) * 1971-09-17 1973-05-04 Atlas Copco Ab
FR2385496A1 (en) * 1977-03-28 1978-10-27 Mekafor Pneumatic drill with bit guide sleeve one end - has air distributor encased in shock absorbent casing other end

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1006378A (en) * 1943-01-15 1952-04-22 Hauhinco Maschf Valve operated pneumatic hammer
FR1183912A (en) * 1957-10-04 1959-07-15 Hauhinco Maschf Compressed air hammer with elastic handle absorbs shocks and vibrations
FR2154036A5 (en) * 1971-09-17 1973-05-04 Atlas Copco Ab
FR2385496A1 (en) * 1977-03-28 1978-10-27 Mekafor Pneumatic drill with bit guide sleeve one end - has air distributor encased in shock absorbent casing other end

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4258799A (en) * 1979-11-27 1981-03-31 Dresser Industries, Inc. Inlet control valve

Also Published As

Publication number Publication date
FR2398581B1 (en) 1983-01-07

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Legal Events

Date Code Title Description
ST Notification of lapse