EP0827813A3 - Hydraulically actuated mechanism with automatic stroke change - Google Patents

Hydraulically actuated mechanism with automatic stroke change Download PDF

Info

Publication number
EP0827813A3
EP0827813A3 EP97114714A EP97114714A EP0827813A3 EP 0827813 A3 EP0827813 A3 EP 0827813A3 EP 97114714 A EP97114714 A EP 97114714A EP 97114714 A EP97114714 A EP 97114714A EP 0827813 A3 EP0827813 A3 EP 0827813A3
Authority
EP
European Patent Office
Prior art keywords
stroke
piston
control valve
setting
working
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
EP97114714A
Other languages
German (de)
French (fr)
Other versions
EP0827813A2 (en
EP0827813B1 (en
Inventor
Heinz-Jürgen Dr.-Ing. Prokop
Marcus Dr.-Ing. Geimer
Karlheinz Fritz
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.)
Construction Tools GmbH
Original Assignee
Krupp Berco Bautechnik GmbH
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 Krupp Berco Bautechnik GmbH filed Critical Krupp Berco Bautechnik GmbH
Publication of EP0827813A2 publication Critical patent/EP0827813A2/en
Publication of EP0827813A3 publication Critical patent/EP0827813A3/en
Application granted granted Critical
Publication of EP0827813B1 publication Critical patent/EP0827813B1/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
    • 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

Abstract

The hammer mechanism (1) has a striking piston (3) moving alternately through working strokes and return strokes under the influence of a control valve (5). The control unit is itself influenced by a servo valve (14) with a returning device (17, 17a) which can be in locked position or open position, depending on the setting of the striking piston. When the piston limit setting in the direction of the working stroke (3e) is exceeded, the control valve is changed to the return stroke setting. During the return stroke immediately following, a short stroke line (18) pressurises the control valve in advance into the working stroke position so that the piston only makes a short stroke.
EP97114714A 1996-09-10 1997-08-26 Hydraulically actuated mechanism with automatic stroke change Expired - Lifetime EP0827813B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19636659 1996-09-10
DE19636659A DE19636659C2 (en) 1996-09-10 1996-09-10 Fluid powered striking mechanism with automatic stroke switching

Publications (3)

Publication Number Publication Date
EP0827813A2 EP0827813A2 (en) 1998-03-11
EP0827813A3 true EP0827813A3 (en) 2000-04-12
EP0827813B1 EP0827813B1 (en) 2003-03-19

Family

ID=7805103

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97114714A Expired - Lifetime EP0827813B1 (en) 1996-09-10 1997-08-26 Hydraulically actuated mechanism with automatic stroke change

Country Status (5)

Country Link
US (1) US5860481A (en)
EP (1) EP0827813B1 (en)
AT (1) ATE234707T1 (en)
DE (2) DE19636659C2 (en)
ES (1) ES2189907T3 (en)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU3907900A (en) * 1999-04-06 2000-10-23 Kwan Software Engineering, Inc. System and method for digitally marking a file with a removable mark
DE10013270A1 (en) * 2000-03-17 2001-09-20 Krupp Berco Bautechnik Gmbh Fluid-driven hammer mechanism has striking piston made immobile if its movement exceeds certain setting
US6491114B1 (en) 2000-10-03 2002-12-10 Npk Construction Equipment, Inc. Slow start control for a hydraulic hammer
FI20010976A (en) * 2001-05-09 2002-11-10 Sandvik Tamrock Oy Method of impact control cycle and impactor
DE10123202A1 (en) 2001-05-12 2002-11-14 Krupp Berco Bautechnik Gmbh Method and device for protecting a fluid-powered striking mechanism against empty blows
US6467554B1 (en) 2001-08-20 2002-10-22 The Charles Machine Works, Inc. Quick reverse mechanism for pneumatic boring tool
US20050247181A1 (en) * 2002-06-07 2005-11-10 Amada Company Limited Slug float-up preventing mechanism
US20040005078A1 (en) * 2002-06-21 2004-01-08 Spectra Systems Corporation Method and apparatus for digitally watermarking images created with a mobile imaging device
DE102004035306A1 (en) * 2004-07-21 2006-03-16 Atlas Copco Construction Tools Gmbh Pressure medium operated impact device, in particular hydraulic hammer
DE102012012297A1 (en) * 2012-03-30 2013-10-02 Atlas Copco Construction Tools Gmbh Valve
FR3007154B1 (en) * 2013-06-12 2015-06-05 Montabert Roger METHOD FOR CONTROLLING THE IMPACT ENERGY OF A STRIPPER PISTON OF A PERCUSSION APPARATUS
SE537608C2 (en) * 2013-11-01 2015-07-28 Tools Pc Ab Const Pneumatic impact device and method of pneumatic impact device
US9701003B2 (en) * 2014-05-23 2017-07-11 Caterpillar Inc. Hydraulic hammer having delayed automatic shutoff
KR101638451B1 (en) * 2014-07-30 2016-07-25 대모 엔지니어링 주식회사 Stepless variable auto stroke hydraulic breaker system
US20160221171A1 (en) * 2015-02-02 2016-08-04 Caterpillar Inc. Hydraulic hammer having dual valve acceleration control system
KR101782535B1 (en) * 2016-01-28 2017-10-24 대모 엔지니어링 주식회사 Hydraulic breaker
US10377028B2 (en) 2016-03-14 2019-08-13 Caterpillar Inc. Hammer protection system and method
US10189153B2 (en) * 2016-03-25 2019-01-29 Sonny Frank Leveling device assembly for a hydraulic hammer
KR101780154B1 (en) * 2016-07-27 2017-09-20 대모 엔지니어링 주식회사 Hydraulic percussion device and construction equipment having the same
KR101907432B1 (en) * 2017-07-24 2018-10-12 주식회사수산중공업 Hydraulic percussion apparatus

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4281587A (en) * 1978-03-31 1981-08-04 Garcia Crespo Jose T Hydraulic apparatus for producing impacts
DE3443542A1 (en) * 1984-11-29 1986-06-05 Fried. Krupp Gmbh, 4300 Essen HYDRAULIC BEATER
EP0587079A2 (en) * 1992-09-04 1994-03-16 Günter Prof Dr. Klemm Hydraulic impact tool
EP0688636A1 (en) * 1994-06-23 1995-12-27 Bretec Oy Hydraulic percussion hammer
JPH1080878A (en) * 1996-09-05 1998-03-31 Furukawa Co Ltd Hydraulic precussion device

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2619072A (en) * 1949-07-25 1952-11-25 Chambersburg Eng Co Drop hammer control
US3669197A (en) * 1969-03-20 1972-06-13 Gardner Denver Co Control system for rock drills
US3880244A (en) * 1972-12-14 1975-04-29 Gardner Denver Co Telescopic rock drill feed
US3995700A (en) * 1975-10-14 1976-12-07 Gardner-Denver Company Hydraulic rock drill system
ZA761650B (en) * 1976-03-17 1977-07-27 Steel Eng Co Ltd Hydraulic percussive machines
SE429111B (en) * 1978-10-19 1983-08-15 Atlas Copco Ab HYDRAULIC DRIVES
DE3115361A1 (en) * 1981-04-16 1982-10-28 Hydroc Gesteinsbohrtechnik GmbH, 5960 Olpe Hydraulic percussion device
SE462117B (en) * 1984-05-24 1990-05-07 Atlas Copco Mct Ab HYDRAULIC ACCUMULATOR FOR A HYDRAULIC SHOCK
US5064005A (en) * 1990-04-30 1991-11-12 Caterpillar Inc. Impact hammer and control arrangement therefor
US5474138A (en) * 1993-12-08 1995-12-12 J & M Hydraulics, Inc. Hydraulic control circuit for pile driver

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4281587A (en) * 1978-03-31 1981-08-04 Garcia Crespo Jose T Hydraulic apparatus for producing impacts
DE3443542A1 (en) * 1984-11-29 1986-06-05 Fried. Krupp Gmbh, 4300 Essen HYDRAULIC BEATER
EP0587079A2 (en) * 1992-09-04 1994-03-16 Günter Prof Dr. Klemm Hydraulic impact tool
EP0688636A1 (en) * 1994-06-23 1995-12-27 Bretec Oy Hydraulic percussion hammer
JPH1080878A (en) * 1996-09-05 1998-03-31 Furukawa Co Ltd Hydraulic precussion device

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 1998, no. 08 30 June 1998 (1998-06-30) *

Also Published As

Publication number Publication date
EP0827813A2 (en) 1998-03-11
ES2189907T3 (en) 2003-07-16
DE19636659A1 (en) 1998-03-12
DE19636659C2 (en) 2000-11-23
US5860481A (en) 1999-01-19
DE59709545D1 (en) 2003-04-24
ATE234707T1 (en) 2003-04-15
EP0827813B1 (en) 2003-03-19

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