GB1480863A - Pneumatic impact tool - Google Patents

Pneumatic impact tool

Info

Publication number
GB1480863A
GB1480863A GB3314875A GB3314875A GB1480863A GB 1480863 A GB1480863 A GB 1480863A GB 3314875 A GB3314875 A GB 3314875A GB 3314875 A GB3314875 A GB 3314875A GB 1480863 A GB1480863 A GB 1480863A
Authority
GB
United Kingdom
Prior art keywords
chamber
piston
shank
aug
head
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
Application number
GB3314875A
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.)
Atlas Copco AB
Original Assignee
Atlas Copco AB
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 Atlas Copco AB filed Critical Atlas Copco AB
Publication of GB1480863A publication Critical patent/GB1480863A/en
Expired 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
    • 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
    • B25D17/24—Damping the reaction force

Landscapes

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

Abstract

1480863 Pneumatic tools ATLAS COPCO AB 8 Aug 1975 [8 Aug 1974] 33148/75 Heading B4C A pneumatic impact tool comprises a differential hammer piston with a head 27 and reduced shank portion 26 which slides in a constricted cylinder portion 30 thus forming a chamber 37, a further chamber 36 being formed between the piston head 27 and the tool 23 and slidable sleeve 18 surrounding it. In use chamber 37 is constantly pressurized from supply 46 and chamber 43. As the piston moves forwards holes 33 in the shank 26 allow pressure air into the shank at 31 and this passes through bore 34 to chamber 36 and an accumulator 42. Due to the differential shape of the piston it is forced backwards until holes 33 in the shank pass constriction 30 and vent the space 36 to atmosphere through outlet 40. The pressure in chamber 37 can again force the piston forwards. A cushioning spring may be provided between sleeve 18 and end cap 17 to absorb vibration. A catch 25 retains the drill steel.
GB3314875A 1974-08-08 1975-08-08 Pneumatic impact tool Expired GB1480863A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE7410147A SE383281B (en) 1974-08-08 1974-08-08 COMPRESSED AIR POWERED IMPACTING TOOL

Publications (1)

Publication Number Publication Date
GB1480863A true GB1480863A (en) 1977-07-27

Family

ID=20321850

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3314875A Expired GB1480863A (en) 1974-08-08 1975-08-08 Pneumatic impact tool

Country Status (6)

Country Link
JP (1) JPS5142176A (en)
DE (1) DE2535106C3 (en)
FI (1) FI62481C (en)
FR (1) FR2281193A1 (en)
GB (1) GB1480863A (en)
SE (1) SE383281B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE404151B (en) * 1977-10-17 1978-09-25 Atlas Copco Ab DEVICE FOR POWER CONTROL OF A PNEUMATIC ENGINE
DE3066499D1 (en) * 1979-08-13 1984-03-15 Linear Pneumatics Inc Method of removing stuck gaskets and pneumatic impact tool therefor
KR200190765Y1 (en) * 2000-03-03 2000-08-01 유성권 A chisel for hammer drill
SE537608C2 (en) 2013-11-01 2015-07-28 Tools Pc Ab Const Pneumatic impact device and method of pneumatic impact device

Also Published As

Publication number Publication date
DE2535106A1 (en) 1976-02-19
FI62481B (en) 1982-09-30
FI752198A (en) 1976-02-09
JPS5142176A (en) 1976-04-09
FI62481C (en) 1983-01-10
FR2281193B1 (en) 1981-04-30
SE383281B (en) 1976-03-08
DE2535106C3 (en) 1978-09-21
SE7410147L (en) 1976-02-09
JPS5432988B2 (en) 1979-10-17
DE2535106B2 (en) 1978-01-19
FR2281193A1 (en) 1976-03-05

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19920808