US3837409A - Rotary hammer power tool - Google Patents

Rotary hammer power tool Download PDF

Info

Publication number
US3837409A
US3837409A US00335933A US33593373A US3837409A US 3837409 A US3837409 A US 3837409A US 00335933 A US00335933 A US 00335933A US 33593373 A US33593373 A US 33593373A US 3837409 A US3837409 A US 3837409A
Authority
US
United States
Prior art keywords
barrel
rotation
cylinder
sleeve
hammer
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 - Lifetime
Application number
US00335933A
Other languages
English (en)
Inventor
F Consoli
P Rebechini
H Beisch
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.)
Skil Corp
Original Assignee
Skil Corp
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 Skil Corp filed Critical Skil Corp
Priority to US00335933A priority Critical patent/US3837409A/en
Priority to CA193,193A priority patent/CA1001454A/en
Priority to IT48627/74A priority patent/IT1008293B/it
Priority to FR7406355A priority patent/FR2218972B1/fr
Priority to CH268174A priority patent/CH583608A5/xx
Priority to GB869074A priority patent/GB1453116A/en
Priority to DE2409206A priority patent/DE2409206A1/de
Priority to JP49022011A priority patent/JPS5024861A/ja
Application granted granted Critical
Publication of US3837409A publication Critical patent/US3837409A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • B25D17/26—Lubricating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D16/00—Portable percussive machines with superimposed rotation, the rotational movement of the output shaft of a motor being modified to generate axial impacts on the tool bit
    • B25D16/006—Mode changers; Mechanisms connected thereto
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S173/00—Tool driving or impacting
    • Y10S173/03—Lubrication

Definitions

  • ABSTRACT A gear type drive train from the motor rotates a barrel, the latter having a drive formation in one end thereof configured to impart rotation to the shank of a tool element received therein.
  • the gear train reciprocates a cylinder simultaneously with rotation of the barrel, which cylinder is reciprocally mounted within the barrel.
  • a hammer is freely mounted within the cylinder and is pneumatically reciprocated for imparting hammering blows to a tappet mounted in the barrel between the hammer and the distal end of the tool ele ment thereby in turn to impart hammering blows to the latter.
  • a spring biases the tappet against the tool shank thereby to prevent flutter of the former.
  • the rotary drive to the barrel may, be selectively disconnected by a manually operated mechanism.
  • a wall of the tool housing cooperates with the barrel to define an annular chamber for receiving a supply of grease; apertures are provided in the barrel and in the sleeve thereby permitting the grease to enter the barrel as well as the sleeve for lubricating the latter and the hammer.
  • the field of the invention relates to portable power tools. More particularly, the field of the present invention relates to so-called rotary hammer power tools, i.e., power tools which have the capability of imparting simultaneous rotation and axial hammering blows to a tool element for working on concrete, for example.
  • rotary hammer power tools i.e., power tools which have the capability of imparting simultaneous rotation and axial hammering blows to a tool element for working on concrete, for example.
  • Rotary hammer power tools of the type referred to are well known in the art. These tools are usually powered by an electric or pneumatic motor and include a rotary output or drive member having a hexagonal bore for receiving the correspondingly shaped shank of a tool element or adapter thereby to impart rotation to the latter. These tools include a hammering mechanism in the form of a reciprocal hammer arranged to strike the distal end of the shank of the tool element or adapter thereby to impart axial hammering blows to the latter simultaneously with the aforementioned rotation. Representative prior art tools are shown in Coates US. Pat. No. 1,191,948, Paule US. Pat. No. 3,456,740, Naslund et al. US. Pat. No.
  • a primary object of the present invention is the provision of a rotary hammer power tool having new and improved means for imparting simultaneous rotation and hammering blows to a tool element or adapter.
  • Another object of the present invention is the provision of a power tool of the type described which includes a tappet disposed between the hammer and the distal end of the shank of the tool element thereby to transfer hammering blows from the hammer to the tool element, wherein a spring is provided for biasing the tappet against the tool element thereby to prevent flutter of the tappet.
  • Still another object of the present invention is the provision of such a power tool wherein the mass of the tappet is substantially less than the mass of the hammer.
  • Another object of the present invention is the provision of a power tool of the type under consideration which includes a manually operated rotary disconnect means whereby the operator of the tool may quickly and easily change the modes of operation from simultaneous hammering and rotation to hammering only and vice versa.
  • Still another object of the present invention is the provision of a power tool of the type described which includes a rotating barrel having a cylinder reciprocating therein, and a hammer pneumatically reciprocating in the cylinder, wherein a wall of the power tool cooperates with the barrel to define an annular chamber adapted to contain a supply of grease, the barrel and the cylinder being provided with apertures to permit the grease to enter the barrel as well as the cylinder for lubricating the latter and the hammer.
  • FIG. 1 is a side elevational view of a rotary hammer power tool embodying the present invention
  • FIG. 2 is an enlarged fragmentary vertical section of the power tool
  • FIG. 3 is a developed plan view of the clutch teeth forming part of the rotary disconnect of the barrel
  • FIG. 4 is an enlarged vertical section of the power tool
  • FIG. 5 is an enlarged section similar to FIG. 4 showing the various parts in their position when a hammering blow is being imparted to the tool element via the spring biased tappet.
  • the portable rotary hammer power tool includes a main housing 11 and a motor housing 12.
  • the power tool could be pneumatically operated, it will I be understood that the power tool 10 includes a suitable electric motor vertically disposed within the housing 12 and arranged to be energized upon depressing the trigger 13 mounted by a handle 14.
  • An auxiliary handle 15 is mounted on theforward portion of the housing 11.
  • a barrel 18 is rotatably mounted within the housing 11 by means of a forward ball bearing assembly 19 and a rearward ball bearing assembly 20.
  • a rotary drive formation 22 is fixedly mounted. in the forward end of the barrel for rotation in unison therewith.
  • This formation includes a through central bore 23 of hexagonal cross section for receiving the correspondingly shaped shank 25 of a tool element or adapter.
  • a first sleeve 27 is mounted on the barrel 18 and is splined thereto such that the sleeve may slide axially relative to the barrel. By reason of this spline type of connection, rotation of the sleeve 27 will of course cause rotation of the barrel 18.
  • a coil spring 28 encircles the barrel and has one end thereof in abutting engagement with the forward end of the sleeve 27. The other end of this spring engages a ring 29a, which ring abuts another ring 29, the latter being received within an annular recess 30 formed in the outer surface of the barrel 18.
  • the spring 28 acts to urge the sleeve 27 rearwardly or inwardly (to the left as shown in the draw ings) for purposes which will become apparent hereinbelow.
  • Another sleeve 32 is mounted on the barrel 18 for rotation with and relative to the barrel. As best noted in FIG. 4, the sleeve 32 is interposed between the ball bearing assembly and the barrel 18.
  • the sleeve 32 includes an integral formation of clutch teeth 33 at the forward end thereof, which teeth are arranged for engagement with an identical and opposite hand series of clutch teeth 34 formed on the inner end of the sleeve 27.
  • the set of clutch teeth 33 on the sleeve 32 are in the form of plural teeth 33a, the arcuate distance between adjacent teeth being substantially greater than the arcuate extent of each tooth.
  • the set of teeth 34 are in the form of individual teeth 34a, again, the open space between adjacent teeth having an arcuate extent substantially greater than the arcuate extent of each tooth. The provision of having these spaces between adjacent teeth substantially greater than the width of each tooth facilitates the engagement of the teeth when the sleeve 32 is rotating.
  • the spring 28 urges the sleeve 27 inwardly so as to maintain the clutch teeth 33, 34 in meshing engagement.
  • the sleeve 27 may be moved axially forwardly relative to the barrel 18 by means of a manually operated shift lever 36.
  • This lever is suitably rotatably mounted in a bore 37 formed in the housing 11 of the power tool, and carries a pin 38 eccentric with respect to the axis of rotation of the shift lever.
  • the pin 38 engages a flange 39 integral with the sleeve 27. It will be understood that rotation of the shift lever 36 in one direction will serve to move the sleeve forwardly against the force of the spring 28 to disengage the clutch teeth 33, 34.
  • the shift lever 36 includes a detent ball 40 biased by a spring 41 thereby releasably to hold the shift lever 36 in its two positions corresponding to the engaged and disengaged positions of the sleeve 27.
  • the sleeve 32 includes an integral formation of gear teeth 44 at one end thereof, these teeth being in meshing engagement with a gear 45 integral with a shaft 46.
  • the shaft 46 is driven by a gear 47, this gear being in meshing engagement with teeth 48 integral with a crank shaft 49.
  • a gear 50 is keyed to the crank shaft 49, which gear is driven by the shaft 51 of an electric motor 52 contained within the housing 12.
  • a cylinder 55 is mounted within the barrel 18.
  • the cylinder 55 includes an annular formation 55a at its forward end and another annular formation 55b at its rearward end, these formations being in sliding engagement with the barrel and defining an annular space 56 between the barrel and the cylinder.
  • a block 57 is fixedly mounted within the inner end of the cylinder 55. This block has a recess 58 receiving one end of a connecting rod 59, the latter being secured to the block 57 by means of a pin 60.
  • the connecting rod is secured to a pin 49a by means of a roller hearing assembly 62.
  • the pin 49a forms part of the crank shaft 49.
  • a cylindrical hammer 64 is mounted within the cylinder 55 for free reciprocal movement therein.
  • the hammer 64 includes a reduced-in-diameter cylindrical formation 64b, the distal end of the latter being slidably received within a reduced-in-diameter portion 55c of the cylinder 55.
  • the hammer 64 is pneumatically actuated or reciprocated in response to reciprocation of the cylinder 55.
  • the cylinder 55 includes apertures 65 in the walls thereof for admitting a supply of air to the space 66 between the block 57 and the hammer 64. This type of pneumatic hammering operation is well known in the art and therefore requires no further discussion herein.
  • the barrel 18 includes an integral, annular flange 68 intermediate the ends thereof.
  • a coil spring 69 has one end thereof in abutting engagement with a washer 70, the latter being held against the annular flange 68 by the spring 69.
  • the other end of this spring is engaged with a tappet 72 for urging the latter forwardly in the barrel 18.
  • the tappet 72 includes an exterior annular recess 73 which receives a ring 74. It will be understood that the tappet 72 is mounted for reciprocal sliding movement within the barrel 18.
  • the spring 69 urges the tappet 72 forwardly and into abutting engagement with an annular face 22a on the inner end of the drive formation 22.
  • the distal end of the former engages thetappet 72 and moves the same inwardly against the force of the spring 69.
  • the hammer extension 64b strikes the tappet 72 (FIG. 5) and thus hammering blows are imparted to the tool element when the distal end of the shank 25 is in abutting engagement with the tappet.
  • opposite faces of the tappet are arranged to be engaged by the respective distal ends of the shank 25 and the hammer extension 6412 thereby to transfer hammering blows from the hammer to the tool element.
  • the spring 69 acts to prevent fluttering or unwanted axial reciprocal movement of the tappet during operation of the power tool. Also, this unwanted fluttering action is avoided by having the mass of the tappet 72 substantially less than the mass of the hammer 64.
  • the housing 11 includes a wall portion 11a which cooperates with the barrel 18 to define an annular space or chamber 76; the forwardmost extremity of this chamber is defined by an annular flange 77 integral with the housing 11.
  • a frusto-conical member 78 forms a seal between the flange 77 and the barrel 18. This seal is held in place by the ring 29 on the barrel 18.
  • the annular space 76 communicates with the crank case chamber 80 via the openings between the individual ball bearings of the ball bearing assembly 20. It will be understood that the spaces 76 and 80 contain a supply of highly viscous lubricating composition, such as a suitable type of grease.
  • the barrel 18 includes plural apertures 82 thereby to permit the grease to enter the barrel and lubricate the walls thereof. The grease passing through the apertures 82 will enter the annular space 56 between the cylinder 55 and the barrel l8 and will in turn enter the barrel through the openings 65. Accordingly, the supply of grease from the space 76 will also lubricate the surfaces of the sleeve and hammer which engage each other.
  • the power tool 11 includes a plate 84 removably secured thereto as by means of fasteners 85.
  • the plate 84 may be removed from time to time to replenish the supply of grease.
  • suitable means such as a cap or removable plate, will be provided in the housing wall 11a to replenish the supply of grease in the chamber 76 from time to time.
  • the present invention provides a new and improved rotary hammer power tool for imparting simultaneous hammering and rotation to a tool element or adapter.
  • the shift lever 36 may be actuated to disengage the clutch teeth 33, 34.
  • the simultaneous hammering and rotation mode of operation may be quickly resumed, again by actuation of the shift lever 36; this operation may be achieved even when the tool is in operation, i.e., with the sleeve 32 rotating.
  • the tool may be withdrawn from the work which will result in the drive member 23 being moved axially relative to the shank 25 thereby allowing the tappet 72 to come to rest against the annular face 22a.
  • the tappet will now be beyond the range of reciprocal movement of the hammer 64 and rotation only will be imparted to the tool element, provided the shift lever 36 is positioned for bringing about engagement of the clutch teeth 33, 34.
  • a rotary drive formation secured to said barrel at one end thereof for engaging the shank of a tool element when the latter is received in said one end of the barrel thereby to impart rotation to the tool element in response to rotation of the barrel;
  • a cylindrical hammer coaxially disposed within said barrel and mounted therein for pneumatic, reciprocal hammering movement in response to reciprocation of said cylinder, which hammer has a formation arranged to transmit hammering blows to the distal end of said shank;
  • a first sleeve coaxially mounted on said barrel for rotation with and relative to the barrel, said first sleeve including a first set of clutch teeth at one end thereof;
  • said drive train including gear means on the other end of said first sleeve connecting said first sleeve with said motor means for rotation of the former upon operation of the latter;
  • a second sleeve coaxially mounted on said barrel for reciprocal, axial sliding movement relative thereto, which second sleeve is connected to said barrel for imparting rotation thereto, said second sleeve mounting a second set of clutch teeth at one end thereof and arranged for engagement with said first clutch teeth;
  • selector means mounted on the housing of the power tool and engaged with said second sleeve for reciprocating the latter axially thereby to engage and disengage said first and second clutch teeth for selective rotation of said barrel.
  • first and second sets of clutch teeth are substantially identical and opposite hand versions of each other, each set of clutch teeth being in the form of a plurality of individual teeth arranged in circumferential spaced relation, the open space between adjacent teeth having an arcuate extent substantially greater than the arcuate extent of each tooth thereby to facilitate the engagement of said first and second sets of clutch teeth at times when said first cylindrical formation is rotating.
  • a barrel rotatably mounted in the housing of the power tool
  • a rotary drive formation secured to the barrel at one end thereof for engaging the shank of a tool element when the latter is received at one end of the barrel thereby to impart rotation to the tool element in response to rotation of the barrel;
  • gear means connected to said barrel adjacent the other end thereof for rotation of the barrel in response to rotation of the gear means
  • motor means in said housing including a drive train engaged with said gear means thereby to impart powered rotation thereto;
  • said drive train including means engaged with said cylinder at one end thereof for reciprocating the same simultaneously with rotation of said gear means;
  • a cylindrical hammer coaxial with said cylinder and freely mounted therein for pneumatic, reciprocal hammering movement in'response to reciprocation of said cylinder, which hammer has a coaxial extension arranged to project beyond, and outwardly of the other end of said cylinder when the latter is in the forward portion of its stroke, which extension is arranged to transmit hammering blows to the distal end of the shank of the tool element;
  • seal means includes an annular seal engaging said wall means and said barrel to form a seal therebetween, said annular seal defining the forward limit of said annular space;
  • said barrel and said cylinder each having apertures in the walls thereof thereby permitting the aforesaid lubricating composition to enter the barrel and said cylinder thereby to lubricate the cylinder and the hammer.
US00335933A 1973-02-26 1973-02-26 Rotary hammer power tool Expired - Lifetime US3837409A (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
US00335933A US3837409A (en) 1973-02-26 1973-02-26 Rotary hammer power tool
CA193,193A CA1001454A (en) 1973-02-26 1974-02-21 Rotary hammer power tool
FR7406355A FR2218972B1 (de) 1973-02-26 1974-02-25
IT48627/74A IT1008293B (it) 1973-02-26 1974-02-25 Utensile motorizzato a martello rotativo
CH268174A CH583608A5 (de) 1973-02-26 1974-02-26
GB869074A GB1453116A (en) 1973-02-26 1974-02-26 Power tools
DE2409206A DE2409206A1 (de) 1973-02-26 1974-02-26 Schlagbohrer
JP49022011A JPS5024861A (de) 1973-02-26 1974-02-26

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00335933A US3837409A (en) 1973-02-26 1973-02-26 Rotary hammer power tool

Publications (1)

Publication Number Publication Date
US3837409A true US3837409A (en) 1974-09-24

Family

ID=23313848

Family Applications (1)

Application Number Title Priority Date Filing Date
US00335933A Expired - Lifetime US3837409A (en) 1973-02-26 1973-02-26 Rotary hammer power tool

Country Status (8)

Country Link
US (1) US3837409A (de)
JP (1) JPS5024861A (de)
CA (1) CA1001454A (de)
CH (1) CH583608A5 (de)
DE (1) DE2409206A1 (de)
FR (1) FR2218972B1 (de)
GB (1) GB1453116A (de)
IT (1) IT1008293B (de)

Cited By (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3929195A (en) * 1973-08-25 1975-12-30 Licentia Gmbh Hammer drill
US3943782A (en) * 1974-11-08 1976-03-16 Skil Corporation Power hammer
US4066136A (en) * 1975-04-15 1978-01-03 Robert Bosch G.M.B.H. Torque and impulse transmitting machine
US4102410A (en) * 1975-03-19 1978-07-25 Ross Frederick W Resilient work-coupled impact device
US4114699A (en) * 1976-01-22 1978-09-19 Licentia Patent-Verwaltungs-Gmbh Pneumatic rotary hammer device
US4158970A (en) * 1977-06-15 1979-06-26 Black & Decker Inc. Override arrangement and actuating knob for a shifting mechanism in portable tools
US4497380A (en) * 1981-06-17 1985-02-05 Black & Decker Inc. Hand-held power tools including bearing supports for components undergoing linear movement
DE3423726A1 (de) * 1983-09-02 1985-03-21 Vsesojuznyj naučno-issledovatel'skij i proektno-konstruktorskij institut mechanizirovannogo i ručnogo stroitel'no-montažnogo instrumenta, vibratorov i stroitel'no-otdeločnych mašin VNNISMI, Chimki, Moskovskaja oblast' Bohrhammer
US4576240A (en) * 1981-10-19 1986-03-18 Kabushiki Kaisha Komatsu Seisakusho Hydraulic impact device
US4763733A (en) * 1985-10-26 1988-08-16 Hilti Aktiengesellschaft Hammer drill with rotational lock
US4945780A (en) * 1989-04-10 1990-08-07 Bosma Machine And Tool Corporation Drive unit for a monorail carrier
US5379848A (en) * 1991-10-25 1995-01-10 Robert Bosch Gmbh Drill hammer
US6015017A (en) * 1997-04-18 2000-01-18 Black & Decker Inc. Rotary hammer
US6109364A (en) * 1995-11-24 2000-08-29 Black & Decker Inc. Rotary hammer
USD431766S (en) * 1999-08-13 2000-10-10 Black & Decker Inc. Drill
US6131671A (en) * 1995-12-25 2000-10-17 Makita Corporation Power-driven tool having a mechanism for setting the rotary angle position of a tool bit
US6789630B2 (en) * 2000-03-03 2004-09-14 Skil Europe B.V. Electric hand tool
US20040226731A1 (en) * 2002-02-08 2004-11-18 Heinz-Werner Faatz Drilling and/or hammering tool
US20060076154A1 (en) * 2003-04-01 2006-04-13 Makita Corporation Power tool
US20060201688A1 (en) * 2005-02-24 2006-09-14 Cheryl Jenner Hammer drill with a mode changeover mechanism
US20070102174A1 (en) * 2004-09-17 2007-05-10 Achim Duesselberg Switching device
US20080006425A1 (en) * 2006-07-01 2008-01-10 Black & Decker Inc. Lubricant pump for powered hammer
US20080029282A1 (en) * 2004-04-30 2008-02-07 Makita Corporation Power Tool
US20080060827A1 (en) * 2004-06-30 2008-03-13 Torbjorn Gunnar Walheim Power Tool With Dust Seal
WO2008071484A1 (de) * 2006-12-14 2008-06-19 Robert Bosch Gmbh Elektrogerät mit aufgerastetem drehbarem bedienungselement
US20080148524A1 (en) * 2006-12-22 2008-06-26 Juergen Wiker Handle
US20100025061A1 (en) * 2006-12-20 2010-02-04 Gerhard Meixner Striking mechanism for a handheld power tool
US7980324B2 (en) 2006-02-03 2011-07-19 Black & Decker Inc. Housing and gearbox for drill or driver
US20130140053A1 (en) * 2013-01-29 2013-06-06 Danuser Llc Post driver with limited movement floating post anvil
US20140138111A1 (en) * 2012-11-19 2014-05-22 Makita Corporation Impact tool
USD943375S1 (en) * 2020-08-11 2022-02-15 Samuel Palmeter Apparatus for removing rust
US11396055B2 (en) * 2019-03-04 2022-07-26 Makita Corporation Reciprocating tool

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2728961C2 (de) * 1977-06-27 1991-08-08 Hilti Ag, Schaan Bohrhammer mit arretierbarem Werkzeughalter
EP0052507B1 (de) * 1980-11-18 1985-02-13 Black & Decker Inc. Schlagbohrgerät
DE3213672C2 (de) * 1982-04-14 1984-07-12 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Stellglied zum Umschalten einer Hammerbohrmaschine mit einem durch einen Taumelscheibenantrieb betätigbaren pneumatischen Schlagwerk vom Betriebszustand "Bohren" in den Betriebszustand "Hammerbohren"
JPS59161279A (ja) * 1983-02-28 1984-09-12 株式会社　山田重機 鏨の撃打装置
DE3502449C3 (de) * 1984-02-08 2002-02-28 Bosch Gmbh Robert Elektropneumatischer Bohr- und/oder Schlaghammer mit batteriegespeistem Antriebsmotor
JPS6176204A (ja) * 1984-09-25 1986-04-18 Matsushita Electric Works Ltd 振動ドリル
DE3503172A1 (de) * 1985-01-31 1986-08-07 Willy 7457 Bisingen Kress Bohr- oder schlaghammer
DE3819125A1 (de) * 1988-06-04 1989-12-14 Bosch Gmbh Robert Bohrhammer
KR100353199B1 (ko) * 2000-05-25 2002-09-18 윤경국 전기해머의 못박기 구조 및 장치
RU2491701C2 (ru) * 2011-12-02 2013-08-27 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Новосибирский государственный технический университет" Синхронный электромагнитный ударный механизм

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3334694A (en) * 1965-01-12 1967-08-08 Milwaukee Electric Tool Corp Rotary hammer
US3376939A (en) * 1965-05-07 1968-04-09 Duss Maschf Power drill with lubricator
US3430708A (en) * 1967-10-02 1969-03-04 Black & Decker Mfg Co Transmission for rotary hammer
US3463246A (en) * 1966-12-28 1969-08-26 Metabowerke Kg Rotary percussive power tool with changeable drive
US3630293A (en) * 1970-10-02 1971-12-28 Black & Decker Mfg Co Closed lubrication system
US3741317A (en) * 1970-05-15 1973-06-26 Hilti Ag Seal arrangement for an electro pneumatic rock drill

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH534036A (de) * 1972-04-18 1973-02-28 Rudolf Studer Fabrik Elek Sche Motorisch, insbesondere durch Elektromotor, angetriebener Schlagbohrhammer

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3334694A (en) * 1965-01-12 1967-08-08 Milwaukee Electric Tool Corp Rotary hammer
US3376939A (en) * 1965-05-07 1968-04-09 Duss Maschf Power drill with lubricator
US3463246A (en) * 1966-12-28 1969-08-26 Metabowerke Kg Rotary percussive power tool with changeable drive
US3430708A (en) * 1967-10-02 1969-03-04 Black & Decker Mfg Co Transmission for rotary hammer
US3741317A (en) * 1970-05-15 1973-06-26 Hilti Ag Seal arrangement for an electro pneumatic rock drill
US3630293A (en) * 1970-10-02 1971-12-28 Black & Decker Mfg Co Closed lubrication system

Cited By (47)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3929195A (en) * 1973-08-25 1975-12-30 Licentia Gmbh Hammer drill
US3943782A (en) * 1974-11-08 1976-03-16 Skil Corporation Power hammer
US4102410A (en) * 1975-03-19 1978-07-25 Ross Frederick W Resilient work-coupled impact device
US4066136A (en) * 1975-04-15 1978-01-03 Robert Bosch G.M.B.H. Torque and impulse transmitting machine
US4114699A (en) * 1976-01-22 1978-09-19 Licentia Patent-Verwaltungs-Gmbh Pneumatic rotary hammer device
US4158970A (en) * 1977-06-15 1979-06-26 Black & Decker Inc. Override arrangement and actuating knob for a shifting mechanism in portable tools
US4497380A (en) * 1981-06-17 1985-02-05 Black & Decker Inc. Hand-held power tools including bearing supports for components undergoing linear movement
US4576240A (en) * 1981-10-19 1986-03-18 Kabushiki Kaisha Komatsu Seisakusho Hydraulic impact device
DE3423726A1 (de) * 1983-09-02 1985-03-21 Vsesojuznyj naučno-issledovatel'skij i proektno-konstruktorskij institut mechanizirovannogo i ručnogo stroitel'no-montažnogo instrumenta, vibratorov i stroitel'no-otdeločnych mašin VNNISMI, Chimki, Moskovskaja oblast' Bohrhammer
US4763733A (en) * 1985-10-26 1988-08-16 Hilti Aktiengesellschaft Hammer drill with rotational lock
US4945780A (en) * 1989-04-10 1990-08-07 Bosma Machine And Tool Corporation Drive unit for a monorail carrier
US5379848A (en) * 1991-10-25 1995-01-10 Robert Bosch Gmbh Drill hammer
US6109364A (en) * 1995-11-24 2000-08-29 Black & Decker Inc. Rotary hammer
US6131671A (en) * 1995-12-25 2000-10-17 Makita Corporation Power-driven tool having a mechanism for setting the rotary angle position of a tool bit
US6015017A (en) * 1997-04-18 2000-01-18 Black & Decker Inc. Rotary hammer
USD431766S (en) * 1999-08-13 2000-10-10 Black & Decker Inc. Drill
US6789630B2 (en) * 2000-03-03 2004-09-14 Skil Europe B.V. Electric hand tool
US7308950B2 (en) 2002-02-08 2007-12-18 Black & Decker Inc. Drilling and/or hammering tool
US20040226731A1 (en) * 2002-02-08 2004-11-18 Heinz-Werner Faatz Drilling and/or hammering tool
US20060076154A1 (en) * 2003-04-01 2006-04-13 Makita Corporation Power tool
US7252157B2 (en) 2003-04-01 2007-08-07 Makita Corporation Power tool
US20080029282A1 (en) * 2004-04-30 2008-02-07 Makita Corporation Power Tool
US7604071B2 (en) * 2004-04-30 2009-10-20 Makita Corporation Power tool with vibration reducing means
US20080060827A1 (en) * 2004-06-30 2008-03-13 Torbjorn Gunnar Walheim Power Tool With Dust Seal
US7395872B2 (en) * 2004-09-17 2008-07-08 Robert Bosch Gmbh Switching device
US20070102174A1 (en) * 2004-09-17 2007-05-10 Achim Duesselberg Switching device
US7314097B2 (en) 2005-02-24 2008-01-01 Black & Decker Inc. Hammer drill with a mode changeover mechanism
US20060201688A1 (en) * 2005-02-24 2006-09-14 Cheryl Jenner Hammer drill with a mode changeover mechanism
US9579785B2 (en) 2006-02-03 2017-02-28 Black & Decker Inc. Power tool with transmission cassette received in clam shell housing
US8205685B2 (en) 2006-02-03 2012-06-26 Black & Decker Inc. Housing and gearbox for drill or driver
US10987793B2 (en) 2006-02-03 2021-04-27 Black & Decker Inc. Power tool with tool housing and output spindle housing
US20110220379A1 (en) * 2006-02-03 2011-09-15 Black & Decker Inc. Housing and gearbox for drill or driver
US7980324B2 (en) 2006-02-03 2011-07-19 Black & Decker Inc. Housing and gearbox for drill or driver
US20080006425A1 (en) * 2006-07-01 2008-01-10 Black & Decker Inc. Lubricant pump for powered hammer
US7401661B2 (en) 2006-07-01 2008-07-22 Black & Decker Inc. Lubricant pump for powered hammer
WO2008071484A1 (de) * 2006-12-14 2008-06-19 Robert Bosch Gmbh Elektrogerät mit aufgerastetem drehbarem bedienungselement
US20100084151A1 (en) * 2006-12-14 2010-04-08 Axel Kuhnle Electrical device with locked-on rotatable operating element
US20100025061A1 (en) * 2006-12-20 2010-02-04 Gerhard Meixner Striking mechanism for a handheld power tool
CN101563191B (zh) * 2006-12-20 2013-01-23 罗伯特·博世有限公司 用于手持式工具机的冲击机构以及手持式工具机
US8011443B2 (en) 2006-12-20 2011-09-06 Robert Bosch Gmbh Striking mechanism for a handheld power tool
US20080148524A1 (en) * 2006-12-22 2008-06-26 Juergen Wiker Handle
US20140138111A1 (en) * 2012-11-19 2014-05-22 Makita Corporation Impact tool
US9463563B2 (en) * 2012-11-19 2016-10-11 Makita Corporation Impact tool
US20130140053A1 (en) * 2013-01-29 2013-06-06 Danuser Llc Post driver with limited movement floating post anvil
US9416514B2 (en) * 2013-01-29 2016-08-16 Danuser Llc Post driver with limited movement floating post anvil
US11396055B2 (en) * 2019-03-04 2022-07-26 Makita Corporation Reciprocating tool
USD943375S1 (en) * 2020-08-11 2022-02-15 Samuel Palmeter Apparatus for removing rust

Also Published As

Publication number Publication date
DE2409206A1 (de) 1974-09-05
GB1453116A (en) 1976-10-20
CH583608A5 (de) 1977-01-14
IT1008293B (it) 1976-11-10
CA1001454A (en) 1976-12-14
FR2218972A1 (de) 1974-09-20
FR2218972B1 (de) 1978-01-06
JPS5024861A (de) 1975-03-17

Similar Documents

Publication Publication Date Title
US3837409A (en) Rotary hammer power tool
US3866692A (en) Power tools
US10195730B2 (en) Rotary hammer
US3203490A (en) Compact rotary hammer
US5588496A (en) Slip clutch arrangement for power tool
EP0014760B1 (de) Leerlauf- und Luftauffüllsystem für Schlaghammermechanismus
US4567951A (en) Hammer drill
US3847229A (en) Portable impact wrench
US4349074A (en) Convertible rotary impact hammer drill
US3305031A (en) Power hammer
US7216749B2 (en) Clutch for rotary power tool and rotary power tool incorporating such clutch
US3837410A (en) Rotary impact drill
DE60035443T2 (de) Schlagbohrmaschine
EP1602451B1 (de) Rotierende Spindel für Elektrowerkzeug und Elektrowerkzeug mit einer solchen Spindel
US3876014A (en) Rotary hammer with rotation stop control trigger
US3845826A (en) Rotary disconnect for a rotary hammer tool
US3114423A (en) Rotary-hammer device
US4114699A (en) Pneumatic rotary hammer device
US3269466A (en) Impact tool
US2784625A (en) Rotary impact tool
JPH03208575A (ja) 衝撃モータ
DE60036244T2 (de) Schlagbohrmaschine
DE19929183A1 (de) Luftfederschlagwerk mit hohlem Schlagkolben
GB2102718A (en) Improvements in or relating to rotary percussive drills
US3587754A (en) Power driven hammers