DK151246B - ELECTROMAGNETIC BOREHAMMER - Google Patents
ELECTROMAGNETIC BOREHAMMER Download PDFInfo
- Publication number
- DK151246B DK151246B DK306372AA DK306372A DK151246B DK 151246 B DK151246 B DK 151246B DK 306372A A DK306372A A DK 306372AA DK 306372 A DK306372 A DK 306372A DK 151246 B DK151246 B DK 151246B
- Authority
- DK
- Denmark
- Prior art keywords
- gear
- locking element
- slider
- tool
- drill hammer
- Prior art date
Links
Classifications
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D2211/00—Details of portable percussive tools with electromotor or other motor drive
- B25D2211/003—Crossed drill and motor spindles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D2216/00—Details of 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
- B25D2216/0007—Details of percussion or rotation modes
- B25D2216/0015—Tools having a percussion-only mode
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D2216/00—Details of 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
- B25D2216/0007—Details of percussion or rotation modes
- B25D2216/0023—Tools having a percussion-and-rotation mode
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D2216/00—Details of 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
- B25D2216/0007—Details of percussion or rotation modes
- B25D2216/0046—Preventing rotation
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Percussive Tools And Related Accessories (AREA)
- Drilling And Boring (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
- Earth Drilling (AREA)
Description
151246151246
Opfindelsen angår en electroborehairrner, ved hvilken drivkraften er delt i en drejningsbevægelse til drejning af værktøjet og i en i retning af værktøjsaksen rettet slagbevægelse, og drejningsbevægelsen overføres gennem et på slagstempelcylinderen anbragt af et spidshjul drevet tand-5 hjul.BACKGROUND OF THE INVENTION 1. Field of the Invention The invention relates to an electro-drill horn in which the driving force is divided into a rotary motion for rotating the tool and in a stroke direction directed by the tool axis, and the rotational movement is transmitted through a pinion driven wheel mounted on the impact piston cylinder.
Borehamre af den angivne art har praktisk taget ubegrænset anvendelighed. Ofte bliver sådanne borehamre anvendt til anbringelse af selvboringsdybler og til mejsling. Ved mejsling og ved anbringelse 10 af selvboredybler, især ved anboring af dyblen og ved inddrivning af spredelegemer bør der kun ske en ren slagbevægelse af værktøjet. Der- 2 151246 for er det nødvendigt, at drejningsbevægelsen kan udkobles, således at der kun foregår en ren slagbevægelse af værktøjet.Drilling hammers of the kind specified have practically unlimited utility. Often such drilling hammers are used for placement of self-drilling dips and for chiselling. When chiseling and when applying 10 self-drilling dies, especially when drilling the dowel and when retracting the spreading members, only a clean stroke of the tool should occur. Therefore, it is necessary that the rotary movement can be disengaged so that only a clean stroke of the tool takes place.
Udkobling af drejningsbevægelsen ved de to nævnte arbejdsfunktioner 5 er kendt, men de kendte anordninger har visse ulemper.Disengaging of the rotational motion at the two mentioned operating functions 5 is known, but the known devices have certain disadvantages.
Således har det f. eks. hidtil kun været muligt at indsætte selvbore-dybler under anvendelse af en speciel dybelforsats, som bliver indsat i borehammerens værktøjspatron og tillader, at drejningsbevægel-10 sen udkobles. Et sådant tilsætningselement til borehammeren danner i flere henseender en hindring, især er en sådan forsats ofte anledning til forstyrrelser, da den er udsat for en stærk tilsmudsning. Endvidere bevirker ethvert tilsætningselement, som anbringes mellem værktøjspatronen og det egentlige værktøj,et vist ydelsestab.Thus, for example, it has so far only been possible to insert self-drilling dips using a special dowel attachment which is inserted into the tool cartridge of the drill hammer and allows the rotary movement to be disengaged. Such an additive to the drill hammer constitutes an obstacle in several respects, in particular, such an attachment is often subject to interference as it is subject to a strong soiling. Furthermore, any addition element placed between the tool cartridge and the actual tool causes a certain loss of performance.
1515
Ved arbejde med mejsler er udkoblingen af drejningsbevægelsen tidligere sket på omstændelig måde. Således er de tidligere kendte mejsler, hvor der ikke ønskedes en overføring af omdrejningsbevægelsen, forsynet med runde indstikningsender på det sted, hvor der ellers finde: 20 fir- eller sekskantede indstiksender. En rund udformning af indstiks-enden har til følge, at den formsluttede forbindelse mellem værktøjet og værktøjspatronen bliver afbrudt, således at der ikke sker nogen overførelse af drejningsbevægelsen til værktøjet. Også denne anordning til udkobling af drejningsbevægelsen er uheldig, da der til for-25 skellige funktionsmåder kræves værktøj med forskelligt udformede ind-stiksender. Endvidere bevirker den ikke drejende mejselende et stærkt slid af den roterende og med firkantet eller sekskantet optageåbning forsynede værktøjspatron.When working with chisels, the disengagement of the turning motion has previously been done in a cumbersome way. Thus, the prior art chisels, where no transfer of the rotational motion was desired, are provided with round insert ends at the location where otherwise: 20 square or hexagonal insert ends. A circular design of the insertion end results in the molded connection between the tool and the tool cartridge being interrupted, so that there is no transfer of the rotational movement to the tool. Also, this device for disabling the rotary motion is unfortunate, since tools for different modes of insertion are required for different modes of operation. Furthermore, the non-rotating chisel causes a strong wear of the rotary and square or hexagonal recess opening cartridge.
30 Det er formålet med opfindelsen at tilvejebringe en borehammer, som muliggør en udkobling af drejningsbevægelsen i selve borehammeren uden anvendelse af hjælpemidler på værktøjet.It is an object of the present invention to provide a drill hammer which enables disengagement of the rotary movement in the drill hammer itself without the use of auxiliary tools on the tool.
Ifølge opfindelsen opnås dette ved, at tandhjulet er således aksialt 35 forskydeligt lejret på slagstempelcylinderen, at det kan indkobles i og udkobles fra spidshjulet ved en forskydningsbevægelse, og at tandhjulet er påvirket af en fjeder til bevægelse hen imod spidshjulet.According to the invention, this is achieved by the gear being so axially displaceably mounted on the impact piston cylinder that it can be engaged and disengaged from the tip wheel by a displacement movement and that the gear is actuated by a spring for movement towards the tip wheel.
Dette har den fordel, at udkoblingen af drejningsbevægelsen kan fore- 3 151246 tages med et eneste enkelt håndgreb på borehammeren. En hurtig ind-og udkobling er især nyttig ved indsætning af selvboringsdybler, da en punktnøjagtig indsættelse ofte kun er mulig,når dyblen før den egentlige under en drejeslagbevægelse følgende inddrivningsproces 5 inddrives noget i optagematerialet ved hjælp af nogle rene slag. Da samtlige til omskiftning tjenende organer er anbragt i maskinens hus, er hele ud- og indkoblingsprocessen fuldstændig uafhængig af ydre indflydelse såsom tilsmudsning. For at opnå en sikker overførelse af drejningsbevægelsen i indkoblet tilstand er der til tilbageføring af 10 det på cy lind eryd er.et aksialt forskydeligt lejrede tandhjul imod drivhjulet anbragt en trykfjeder.This has the advantage that the disengagement of the rotary movement can be made with a single single handle on the drill hammer. A quick switch-on and disengagement is especially useful when inserting self-drilling dips, as a point-accurate insertion is often only possible when the dive is recovered somewhat in the recording material by some clean strokes prior to the actual rotational stroke following process 5. Since all switching means are housed in the machine housing, the entire disengaging and switching process is completely independent of external influences such as soiling. In order to obtain a safe transmission of the rotational motion in the engaged state, a compression spring is arranged for the return of the axially displaceable bearing gear against the drive wheel.
Ud- henholdsvis indkobling af tandhjulet sker fortrinsvis ved hjælp af en i retning af værktøjsaksen bevægelig med tandhjulet indgribende 15 skyder.Preferably, engagement of the sprocket is effected by means of a slider movable in the direction of the tool axis with the sprocket engaging 15.
Fortrinsvis er til fiksering af det i udkoblet tilstand værende tandhjul anbragt et i retning af værktøj saksen bevægelig spærreelement. Dette har den fordel, at et værktøj, på hvilket kun slagbevægelsen 20 bliver overført, ikke kan fordreje sig. Derved kan f. eks. ved arbejde med mejsler værktøjet styres direkte med sidegrebet på borehammeren, således at et ofte på grund af rystelser til håndsmerter førende mejselgreb kan bortfalde. Er hele udkoble- og indkoblingsmekanismen udformet således, at tandhjulet først bliver fuldstændigt 25 udkoblet, og at spærreelementet derefter kommer i indgreb, kan i stillingen mellem udkobling og indkobling af værktøjet,f. eks. en mejsel, endnu fordrejes til den ønskede stilling, før en fiksering sker ved hjælp af spærreelementet.Preferably, for fixing the cogwheel in the disengaged state, a locking element movable in the direction of the tool is arranged. This has the advantage that a tool to which only the stroke movement 20 is transmitted cannot distort. Thus, for example, when working with chisels, the tool can be controlled directly with the side handle of the drill hammer, so that a chisel leading grip often due to shakes to hand pain. If the entire disengaging and engaging mechanism is designed such that the sprocket first becomes fully disengaged and the locking element then engages, in the position between disengaging and engaging the tool, f. a chisel, for example, is still distorted to the desired position before a fixing is done by the locking element.
30 Hensigtsmæssigt indgriber til fiksering af det i udkoblet tilstand værende tandhjul det dertil tjenende spærreelement med tandhjulets fortanding. Spærreelementet kan derved være forsynet med nokker eller en til tandhjulet svarende fortanding.Conveniently, for fixing the cogwheel in the disengaged state, the locking element serving with the gearwheel engages with it. The locking element may thereby be provided with camshafts or a tooth corresponding to the gear.
35 For at tilvejebringe en hurtig og sikker ind- og udkobling af dreje-bevægelsen såvel som en fiksering af værktøjet i slagstillingen er til betjening af skyderen henholdsvis spærreelementet anvendt et uden 4 151246 for borehammerhuset tilgængeligt betjeningsorgan.35 In order to provide a quick and safe switch-on and disengagement of the rotary movement as well as a fixation of the tool in the impact position, an operating means accessible to the slider and the locking element, respectively, is used for the slider hammer housing.
Betjeningsorganet til betjening af skyderen henholdsvis spærreelementet har fordelagtigt en styrenokke, som., indgriber i en styrekurve på 5 skyderen henholdsvis spærreelementet.Advantageously, the actuator for operating the slider and the locking element has a control cam, which, intervenes in a control curve of the slider and the locking element, respectively.
I den følgende beskrivelse forklares opfindelsen under henvisning til tegningen, hvor 10 fig. 1 viser en borehammer ifølge opfindelsen set fra siden delvis i snit, fig. 2 en skyder med spærreelement, 15 fig. 3 en del af borehammeren med udkoblet tandhjul, fig. k det samme som fig. 2 for stillingen i fig. 3, - fig. 5 det samme som fig. 3 med fastholdt tandhjul, 20 fig. 6 det samme som fig. 2 og b for stillingen ifølge fig. 5, fig. 7 et snit efter linien VII-VII i fig. 1 og 25 fig. 8 en del af borehammeren ifølge fig. 1 set i retning af pilen Å.In the following description, the invention is explained with reference to the drawing, in which: FIG. 1 is a partial side elevational view of a drill hammer according to the invention; FIG. 2 shows a slider with a locking element; FIG. 3 shows a part of the hammer with cut-off gear, fig. k the same as fig. 2 for the position of FIG. 3, FIG. 5 the same as FIG. 3 with retained gears, 20 fig. 6 the same as FIG. 2 and b for the position of FIG. 5, FIG. 7 is a sectional view taken along line VII-VII of FIG. 1 and 25 FIG. 8 shows part of the hammer according to FIG. 1 in the direction of the arrow Å.
Som det fremgår af fig. 1, er der på et motorhus 1 og et dermed forbundet drevhus 2 anbragt et håndtag 3 med en trykomskifter *+. Fra 3Q et drivtandhjul la bliver drejebevægelsen gennem et tandhjul 5 overført til en ved 6 lejret med 7 betegnet krumtapaksel, hvis fortanding 7a indgriber med et tandhjul 8. Tandhjulet 8 er fastgjort på en ved 9 lejret spidshjulsaksel 10, hvis ene ende lb er lejret i motorhuset, og hvis anden ende er udformet som spidshjul 11 og er i indgreb med 35 et tandhjul 12.As shown in FIG. 1, a handle 3 with a pressure switch * + is arranged on a motor housing 1 and an associated drive housing 2. From 3Q a drive gear 1a, the pivot movement through a gear 5 is transferred to a crankshaft designated at 6 bearing 7, the gear of which 7a engages with a gear 8. The gear 8 is secured to a sprocket shaft 10 mounted at 9, one end of which lb is mounted in the motor housing, the other end of which is designed as a sprocket 11 and engages a sprocket 12.
5 1512465 151246
Fra krumtapakselen 7 bliver gennem en krumtap 7b og en plejlstang 13 et i cylinderen 1^ lejret pneumatisk stempel 15 sat i frem- og tilbagegående bevægelse, således at et i cylinderen 1*+ lejret slag- 5 stempel 16 gennem en mellem slagstemplet og stemplet 15 i rummet 17 indelukket luftpude ligeledes bliver sat i frem- og tilbagegående bevægelse. Den kinetiske energi af slagstemplet 16 bliver ved hjælp af en stempelstang 16b overført slagagtig på skaftet for et i en værk-10 tøjspatron 18 optaget værktøj 19· Værktøjet 19 er på kendt måde, f. eks. ved hjælp af sekskant- eller låseelementer, lejret længdeforskydeligt og udrejeligt i patronen 18.From the crankshaft 7, through a crank 7b and a connecting rod 13, a pneumatic piston 15 stored in the cylinder 1 ^ is set in reciprocating motion, so that a piston 16 stored in the cylinder 1 * + between a piston and piston 15 in the chamber 17, the airbag enclosed is also set in reciprocating motion. The kinetic energy of the impact piston 16 is transmitted stroke-like on the shaft by means of a piston rod 16b for a tool 19 accommodated in a tool 10 cartridge 18 · The tool 19 is stored in a known manner, for example by means of hexagonal or locking elements. longitudinally displaceable and extendable in the cartridge 18.
Overføringen af drejebevægelsen til værktøjet 19 sker ved hjælp af 15 en ved 20 og 21 drejeligt lejret cylinder 1*+, og på denne virker tandhjulet 12's drejebevægelse. En i cylinderen 1*+ anbragt kile 22 tilvej ebringer den udrejelige forbindelse imellem tandhjulet 12 og cylinderen 1*+. Tandhjulet 12 er lejret aksialt forskydeligt på cylinderen 1^,. idet det til frembringelse af en .formsluttende forbin-2q delse med spidshjulet 11 bliver skubbet imod dette ved kraften af en fjeder 23.The turning movement of the tool 19 to the tool 19 is effected by means of a cylinder 1 * + pivotally mounted at 20 and 21, on which the turning movement of the gear wheel 12 acts. A key 22 provided in the cylinder 1 * + provides the removable connection between the sprocket 12 and the cylinder 1 * +. The gear 12 is mounted axially displaceable on the cylinder 1 in order to produce a form-fitting connection with the sprocket 11 being pushed against it by the force of a spring 23.
Af fig. 1 fremgår det, at der findes en enden af cylinderen l1* omsluttende ring 2*+, som er anbragt mellem en skyder 25 og den bort fra fjederen 23 vendende side af tandhjulet 12. Over skyderen 25 er lej-ret et spærreelement 26. Skyderen 25 og spærreelementet 26 indeholder - som det især fremgår af fig. 2, ^ og 6 - styrekurver 25a, 26a, hvormed en styrenokke 27 indgriber, hvilken styrenokke er anbragt på en 1 huset 2 drejeligt lejret vægtstang 28. Den imod tandhjulet 12 ven-dende ende af spærreelementet 26 er - som det fremgår af fig. 7 -tilpasset rundingen af tandhjulet 12 og bærer en tilsvarende fortånding 26b. Fig. 1 viser endvidere, hvorledes der i vægtstangen 28 er anbragt et af en fjeder 29 belastet indgrebselement 30. Ved anbringelse af tilsvarende udtagninger for dette indgrebselement 30 i huset 35 o 2 kan opnås en fastholdelse af vægtstangen 28 i ønskede stillinger.In FIG. 1, it appears that there is an end of the cylinder 11 * enclosing ring 2 * + which is arranged between a slider 25 and the side of the gear wheel away from the spring 23 12. A slider element 26 is mounted above the slider 25. 25 and the locking element 26 contains - as can be seen in particular from FIG. 2, 6 and 6 - guide curves 25a, 26a, whereby a guide cam 27 engages which guide cam is positioned on a lever 28 pivotally mounted on the housing 2. The end of the locking member 26 facing the gear wheel 12 is 7 adapted to the rounding of the sprocket 12 and carries a corresponding tooth 26b. FIG. 1 further shows how in the bar 28 a locking member 30 loaded by a spring 29 is arranged. By attaching corresponding recesses for this engagement member 30 in the housing 35 and 2 a holding of the bar 28 in desired positions can be obtained.
det følgende forklares borehammerens virkemåde: 6 151246The following explains the operation of the drill hammer: 6 151246
Pig. 1 viser borehammeren med vægtstangen i stillingen I ifølge fig.Pig. 1 shows the drill hammer with the lever in position I according to FIG.
8. I denne stilling befinder tandhjulet 12 sig i indgreb med spidshjulet 11, d.v.s. at der til værktøjet 19 overføres såvel slagbevæ-gelse som drejehevægelse.8. In this position, the sprocket 12 is engaged with the sprocket 11, i.e. that both stroke movement and pivotal motion are transmitted to the tool 19.
5 Ifølge stillingen af vægtstangen i fig. 1 viser fig. 2 spærreelementet 26 med den derunder anbragte skyder 25 samt den til denne stilling svarende stilling af styrenokken 27.5 According to the position of the lever in FIG. 1 shows FIG. 2 shows the locking element 26 with the slider 25 located therein and the position of the control cam 27 corresponding to this position.
Fig. 3 viser en del af borehammeren i stillingen II ifølge fig. 8.FIG. 3 shows part of the drill hammer in position II according to FIG. 8th
10 I denne stilling er tandhjulet 12 udkoblet fra det drivende spidshjul 11, således at kun den rene slagbevægelse overføres til værktøjet 19. Tandhjulet 12 og dermed også værktøjet 19 er i denne stilling drejelige efter ønske, således at værktøjet ved drejning i værktøjspatronen l8 kan bringes i den ønskede stilling.10 In this position, the gear 12 is disengaged from the driving tip wheel 11 so that only the pure stroke movement is transmitted to the tool 19. The gear 12 and thus also the tool 19 are in this position rotatable as desired, so that the tool can be brought into the tool cartridge by rotation. in the desired position.
1515
Fig. viser den til stillingen ifølge fig. 3 svarende stilling af skyderen 25 og spærreelementet 26 samt den i disses styrekurver 25a, 26a indgribende styrenokke 27.FIG. shows it to the position of FIG. 3 corresponding to the position of the slider 25 and the locking element 26 as well as the guide nooks 27 engaging in their control curves 25a, 26a.
20 Fig. 5 viser en del af borehammeren svarende til vægtstangstillingen III ifølge fig. 8. I denne stilling bliver der kun overført en ren slagbevægelse til værktøjet 19, da tandhjulet 12 er koblet fri af drivspidshjulet 11. Desuden står i denne stilling fortandingen 26b på spærreelementet 26 i indgreb med tandhjulet 12, således at dette 25 og dermed også værktøjet 19 er sikret imod drejning. Denne stilling tjener fortrinsvis til arbejde med mejsler, da på grund af drejningssikringen mejselen styres direkte med maskinen uden hjælp af et mejselgreb .FIG. 5 shows a portion of the drill hammer corresponding to the lever post III of FIG. 8. In this position, only a clean stroke movement is transmitted to the tool 19, as the gear 12 is disengaged from the drive tip wheel 11. Furthermore, in this position, the tooth 26b on the locking element 26 engages the gear 12 so that this 25 and thus also the tool 19 is secured against rotation. This position is preferably used for working with chisels, since due to the rotation lock the chisel is controlled directly with the machine without the aid of a chisel grip.
30 Af fig. 6 fremgår den til stillingen ifølge fig. 5 svarende stilling af spærre element et 26 =og den derunder anbragte skyder 25 samt den i styre-kurverne 25a og 26a indgribende styrenokke 27.30 From FIG. 6, it appears in the position of FIG. 5 corresponding to the position of the locking element 26 = and the slider 25 located therein as well as the guide cam 27 engaging in the control curves 25a and 26a.
Claims (5)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2136523 | 1971-07-21 | ||
DE2136523A DE2136523C3 (en) | 1971-07-21 | 1971-07-21 | Electric hammer |
Publications (2)
Publication Number | Publication Date |
---|---|
DK151246B true DK151246B (en) | 1987-11-16 |
DK151246C DK151246C (en) | 1988-04-11 |
Family
ID=5814369
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DK306372A DK151246C (en) | 1971-07-21 | 1972-06-20 | ELECTROMAGNETIC BOREHAMMER |
Country Status (20)
Country | Link |
---|---|
US (1) | US3774699A (en) |
JP (1) | JPS5427801B1 (en) |
AT (1) | AT312483B (en) |
AU (1) | AU451336B2 (en) |
BE (1) | BE785328A (en) |
CA (1) | CA989211A (en) |
CH (1) | CH539492A (en) |
CS (1) | CS154207B2 (en) |
DE (1) | DE2136523C3 (en) |
DK (1) | DK151246C (en) |
FI (1) | FI58084C (en) |
FR (1) | FR2146732A5 (en) |
GB (1) | GB1364961A (en) |
HU (1) | HU166236B (en) |
IE (1) | IE36566B1 (en) |
IT (1) | IT956110B (en) |
NL (1) | NL175273C (en) |
NO (1) | NO134711C (en) |
SE (1) | SE384337B (en) |
ZA (1) | ZA724192B (en) |
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DE2916499A1 (en) * | 1979-04-24 | 1980-11-06 | Duss Maschf | ELECTRIC HAND DRILLING MACHINE WITH DEVICE FOR ADJUSTMENT FOR ROTATING OR IMPACTING DRILLING |
DE2917475A1 (en) * | 1979-04-30 | 1980-11-13 | Hilti Ag | DRILLING OR CHISEL HAMMER |
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GB2112479B (en) * | 1981-11-13 | 1985-05-01 | Black & Decker Inc | Latching arrangement |
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DE3503173A1 (en) * | 1985-01-31 | 1986-08-07 | Willy 7457 Bisingen Kress | Actuator for changing over operating states of (portable) electric tools and method of assembling it |
DE3516494A1 (en) * | 1985-05-08 | 1986-11-13 | Hilti Ag, Schaan | DRILLING HAMMER |
DE3538166A1 (en) * | 1985-10-26 | 1987-04-30 | Hilti Ag | DRILL HAMMER WITH TURN LOCK |
DE3826213A1 (en) * | 1988-08-02 | 1990-02-15 | Bosch Gmbh Robert | DRILLING HAMMER |
DE4010037A1 (en) * | 1990-03-29 | 1991-10-02 | Hilti Ag | Speed adjusting mechanism for portable drill - has switch lever movement constrained by spring clip exerting force |
DE4135240A1 (en) * | 1991-10-25 | 1993-04-29 | Bosch Gmbh Robert | DRILLING HAMMER |
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- 1971-07-21 DE DE2136523A patent/DE2136523C3/en not_active Expired
-
1972
- 1972-05-26 CH CH783572A patent/CH539492A/en not_active IP Right Cessation
- 1972-05-31 IT IT25206/72A patent/IT956110B/en active
- 1972-06-12 NL NLAANVRAGE7207974,A patent/NL175273C/en not_active IP Right Cessation
- 1972-06-15 GB GB2795172A patent/GB1364961A/en not_active Expired
- 1972-06-16 AT AT519872A patent/AT312483B/en active
- 1972-06-19 ZA ZA724192A patent/ZA724192B/en unknown
- 1972-06-20 DK DK306372A patent/DK151246C/en not_active IP Right Cessation
- 1972-06-23 BE BE785328A patent/BE785328A/en not_active IP Right Cessation
- 1972-06-30 CS CS465972A patent/CS154207B2/cs unknown
- 1972-07-03 JP JP6658872A patent/JPS5427801B1/ja active Pending
- 1972-07-04 HU HUHI331A patent/HU166236B/hu unknown
- 1972-07-06 AU AU44281/72A patent/AU451336B2/en not_active Expired
- 1972-07-06 FR FR7224468A patent/FR2146732A5/fr not_active Expired
- 1972-07-10 FI FI1963/72A patent/FI58084C/en active
- 1972-07-12 NO NO2504/72A patent/NO134711C/no unknown
- 1972-07-13 IE IE992/72A patent/IE36566B1/en unknown
- 1972-07-19 SE SE7209498A patent/SE384337B/en unknown
- 1972-07-20 CA CA147,552A patent/CA989211A/en not_active Expired
- 1972-07-21 US US00274050A patent/US3774699A/en not_active Expired - Lifetime
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FR1463994A (en) * | 1965-11-15 | 1966-07-22 | Pneumatically controlled percussion machine |
Also Published As
Publication number | Publication date |
---|---|
GB1364961A (en) | 1974-08-29 |
CS154207B2 (en) | 1974-03-29 |
FI58084C (en) | 1980-12-10 |
DK151246C (en) | 1988-04-11 |
NL7207974A (en) | 1973-01-23 |
NO134711C (en) | 1976-12-01 |
DE2136523A1 (en) | 1973-02-01 |
NL175273B (en) | 1984-05-16 |
DE2136523B2 (en) | 1979-04-19 |
IT956110B (en) | 1973-10-10 |
ZA724192B (en) | 1973-03-28 |
IE36566L (en) | 1973-01-21 |
NO134711B (en) | 1976-08-23 |
BE785328A (en) | 1972-10-16 |
SE384337B (en) | 1976-05-03 |
FI58084B (en) | 1980-08-29 |
FR2146732A5 (en) | 1973-03-02 |
JPS5427801B1 (en) | 1979-09-12 |
CH539492A (en) | 1973-07-31 |
DE2136523C3 (en) | 1983-11-03 |
AU451336B2 (en) | 1974-08-01 |
CA989211A (en) | 1976-05-18 |
NL175273C (en) | 1984-10-16 |
AT312483B (en) | 1974-01-10 |
US3774699A (en) | 1973-11-27 |
AU4428172A (en) | 1974-01-10 |
IE36566B1 (en) | 1976-12-08 |
HU166236B (en) | 1975-02-28 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PBP | Patent lapsed |