EP1048415A3 - Rotary hammer - Google Patents

Rotary hammer Download PDF

Info

Publication number
EP1048415A3
EP1048415A3 EP00303158A EP00303158A EP1048415A3 EP 1048415 A3 EP1048415 A3 EP 1048415A3 EP 00303158 A EP00303158 A EP 00303158A EP 00303158 A EP00303158 A EP 00303158A EP 1048415 A3 EP1048415 A3 EP 1048415A3
Authority
EP
European Patent Office
Prior art keywords
impact member
cylinder
hammer
bit
tool holder
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
EP00303158A
Other languages
German (de)
French (fr)
Other versions
EP1048415A2 (en
EP1048415B1 (en
Inventor
Reinhard Plietsch
Michael Stirm
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.)
Black and Decker Inc
Original Assignee
Black and Decker Inc
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 Black and Decker Inc filed Critical Black and Decker Inc
Priority to EP07105981A priority Critical patent/EP1815947A3/en
Publication of EP1048415A2 publication Critical patent/EP1048415A2/en
Publication of EP1048415A3 publication Critical patent/EP1048415A3/en
Application granted granted Critical
Publication of EP1048415B1 publication Critical patent/EP1048415B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B25D17/06—Hammer pistons; Anvils ; Guide-sleeves for pistons
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D11/00—Portable percussive tools with electromotor or other motor drive
    • B25D11/005—Arrangements for adjusting the stroke of the impulse member or for stopping the impact action when the tool is lifted from the working surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2217/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D2217/0011—Details of anvils, guide-sleeves or pistons
    • B25D2217/0023—Pistons
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2250/00—General details of portable percussive tools; Components used in portable percussive tools
    • B25D2250/035—Bleeding holes, e.g. in piston guide-sleeves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2250/00—General details of portable percussive tools; Components used in portable percussive tools
    • B25D2250/191—Ram catchers for stopping the ram when entering idling mode
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2250/00—General details of portable percussive tools; Components used in portable percussive tools
    • B25D2250/365—Use of seals

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Ultra Sonic Daignosis Equipment (AREA)
  • Percussion Or Vibration Massage (AREA)

Abstract

A hammer that is capable or receiving a tool bit (30) for acting on a workpiece, and includes an air cushion hammering mechanism that comprises a cylinder (2), a piston (6) that can be caused to reciprocate within the cylinder, and an impact member (12) that is slidably located within the cylinder and can be caused to move in response to reciprocation of the piston by means of an air cushion between the piston and the impact member so that the impact member can strike the end of a bit (30) that is held in the hammer. The hammer includes a web (22) of flexible impervious material that extends from the impact member to prevent ingress of dust from the region of the bit to the cylinder. A hammer is also provided which includes an arrangement for arresting the impact member in its forward position, which comprises a resilient ring (52) that is located within the cylinder and extends around the impact member, the impact member (12) having an intermediate portion (100) of varying diameter so that, at a given position of the impact member in the cylinder, the intermediate portion (100) of the impact member touches the resilient ring (52) and a substantially closed chamber is formed within the cylinder (2) that extends around the resilient ring (52), further forward movement of the impact member reducing the volume of the chamber (70) and causing the resilient ring (52) to constrict the impact member. A hammer is also provided which includes a housing (1) and a tool holder (4) that can receive a tool bit (30) for acting on a workpiece, in which the bit (30) is retained in the tool holder by means of one or more locking elements (42) and the hammer includes one or more cushioning elements (34, 36) located between the tool holder (4) and the housing (1) so that impacts that are reflected by the workpiece back along the bit (30) are transmitted to the housing via the tool holder (4) and the cushioning element(s) (34, 36).
EP00303158A 1999-04-30 2000-04-14 Rotary hammer Expired - Lifetime EP1048415B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP07105981A EP1815947A3 (en) 1999-04-30 2000-04-14 Rotary hammer

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB9909987.1A GB9909987D0 (en) 1999-04-30 1999-04-30 Rotary hammer
GB9909987 1999-04-30

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP07105981A Division EP1815947A3 (en) 1999-04-30 2000-04-14 Rotary hammer

Publications (3)

Publication Number Publication Date
EP1048415A2 EP1048415A2 (en) 2000-11-02
EP1048415A3 true EP1048415A3 (en) 2002-07-24
EP1048415B1 EP1048415B1 (en) 2007-08-01

Family

ID=10852556

Family Applications (2)

Application Number Title Priority Date Filing Date
EP00303158A Expired - Lifetime EP1048415B1 (en) 1999-04-30 2000-04-14 Rotary hammer
EP07105981A Withdrawn EP1815947A3 (en) 1999-04-30 2000-04-14 Rotary hammer

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP07105981A Withdrawn EP1815947A3 (en) 1999-04-30 2000-04-14 Rotary hammer

Country Status (5)

Country Link
EP (2) EP1048415B1 (en)
JP (1) JP2000326263A (en)
AT (1) ATE368552T1 (en)
DE (1) DE60035732T2 (en)
GB (1) GB9909987D0 (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10030962C2 (en) * 2000-06-24 2002-06-20 Hilti Ag Electric hand tool device with striking mechanism
CN1329164C (en) * 2001-09-17 2007-08-01 密尔沃基电动工具公司 Rotary hammer
DE10260710A1 (en) * 2002-12-23 2004-07-01 Robert Bosch Gmbh Hammer or percussion hammer
DE10362025B4 (en) * 2003-05-20 2006-02-09 Robert Bosch Gmbh Drill or hammer
DE102007000081A1 (en) * 2007-02-08 2008-08-21 Hilti Ag Hand tool with pneumatic percussion
DE102007056531A1 (en) * 2007-11-23 2009-05-28 Hilti Aktiengesellschaft Hand tool machine with impact tool holder and associated tool
DE102009045656A1 (en) * 2009-10-14 2011-04-21 Robert Bosch Gmbh Drilling and/or chipping hammer device, has puncher support device including puncher brake unit, storage unit storing puncher brake unit movably relative to housing unit, and guiding unit partially formed from hammer tube
DE102012212231A1 (en) 2012-07-12 2014-01-16 Hilti Aktiengesellschaft Hand tool
JP6070368B2 (en) * 2013-03-29 2017-02-01 日立工機株式会社 Impact tool
EP3009237A1 (en) * 2014-10-16 2016-04-20 HILTI Aktiengesellschaft Chisel hammer
EP3231560A1 (en) * 2016-04-13 2017-10-18 HILTI Aktiengesellschaft Handheld machine tool
CN112223218A (en) * 2020-10-23 2021-01-15 杭州兔研工业设计有限公司 Impact head for electric pick and electric pick

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1594228A (en) * 1925-06-20 1926-07-27 Ingersoll Rand Co Dustless anvil block
GB810464A (en) * 1954-11-12 1959-03-18 Arno Jochums Improvements in or relating to pneumatic tools
US3921729A (en) * 1971-11-25 1975-11-25 Hilti Ag Electropneumatic hammer
US4276941A (en) * 1978-10-10 1981-07-07 Robert Bosch Gmbh Hand-held power tool
US4284148A (en) * 1978-05-09 1981-08-18 Robert Bosch Gmbh Portable hammer drill with rotating tool
US4442906A (en) * 1980-11-18 1984-04-17 Black & Decker Inc. Percussive drills
GB2136725A (en) * 1983-03-15 1984-09-26 Bosch Gmbh Robert Hammer, in particular drill hammer
DE3520036A1 (en) * 1985-06-04 1986-12-04 "F. u. K." Frölich & Klüpfel Drucklufttechnik GmbH & Co KG, 5600 Wuppertal Inscription hammer

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2916499A1 (en) * 1979-04-24 1980-11-06 Duss Maschf ELECTRIC HAND DRILLING MACHINE WITH DEVICE FOR ADJUSTMENT FOR ROTATING OR IMPACTING DRILLING
DE3335795A1 (en) * 1983-10-01 1985-04-18 Black & Decker Inc., Newark, Del. DRILLING HAMMER
DE3531641A1 (en) * 1985-09-05 1987-03-05 Hilti Ag DRILL AND CHISEL HAMMER
JP3424870B2 (en) * 1995-02-28 2003-07-07 株式会社マキタ Immersion prevention device for impact tools

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1594228A (en) * 1925-06-20 1926-07-27 Ingersoll Rand Co Dustless anvil block
GB810464A (en) * 1954-11-12 1959-03-18 Arno Jochums Improvements in or relating to pneumatic tools
US3921729A (en) * 1971-11-25 1975-11-25 Hilti Ag Electropneumatic hammer
US4284148A (en) * 1978-05-09 1981-08-18 Robert Bosch Gmbh Portable hammer drill with rotating tool
US4276941A (en) * 1978-10-10 1981-07-07 Robert Bosch Gmbh Hand-held power tool
US4442906A (en) * 1980-11-18 1984-04-17 Black & Decker Inc. Percussive drills
GB2136725A (en) * 1983-03-15 1984-09-26 Bosch Gmbh Robert Hammer, in particular drill hammer
DE3520036A1 (en) * 1985-06-04 1986-12-04 "F. u. K." Frölich & Klüpfel Drucklufttechnik GmbH & Co KG, 5600 Wuppertal Inscription hammer

Also Published As

Publication number Publication date
EP1048415A2 (en) 2000-11-02
EP1048415B1 (en) 2007-08-01
ATE368552T1 (en) 2007-08-15
GB9909987D0 (en) 1999-06-30
EP1815947A2 (en) 2007-08-08
JP2000326263A (en) 2000-11-28
DE60035732T2 (en) 2008-04-30
EP1815947A3 (en) 2013-03-06
DE60035732D1 (en) 2007-09-13

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