| Patents for B23B 45 - Hand-held or like portable drilling machines, e.g. drill guns; Equipment therefor (6,587) |
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| 10/01/1991 | US5052497 Apparatus for driving a drilling or percussion tool |
| 09/26/1991 | DE4009402A1 Battery-powdered machine tool with two-pole switch |
| 09/25/1991 | EP0448505A2 Battery driven device |
| 09/25/1991 | EP0447620A1 Drilling machine with automatic feed |
| 09/24/1991 | US5051044 Pipe drilling apparatus |
| 09/24/1991 | CA1289552C Body construction for a drilling machine |
| 09/19/1991 | WO1991013728A1 Underfloor drilling jig and frame |
| 09/11/1991 | EP0345344A4 Airfeed peck drill configuration |
| 09/10/1991 | US5046901 Flush bolt boring jig |
| 09/10/1991 | US5046900 Hand drilling tool for drilling out spot welds |
| 09/10/1991 | CA1288762C Arrangement for supporting of an axial bearing of a drilling machine |
| 09/04/1991 | EP0444030A1 Drilling hammer. |
| 08/29/1991 | DE4005431A1 Drilling machine with automatic feed - produces series of holes in workpieces with equally shaped curved surfaces |
| 08/28/1991 | CN2083523U Automatic depth fixing drill for plate work |
| 08/22/1991 | WO1991012116A1 Hand-held machine tool |
| 08/21/1991 | CN2083086U Miniature dc hand-held electric drill |
| 08/13/1991 | US5038651 Device for cutting shaped holes |
| 08/08/1991 | DE4003252A1 Hand tool having drive means with lubricant - comprising gears which accelerate froth formation and lubricant controlling froth build-up |
| 08/06/1991 | US5036925 Rotary hammer with variable hammering stroke |
| 07/31/1991 | EP0357648B1 Torque-transmitting device for hand-held power tools |
| 07/31/1991 | CN2081771U Drill set with circular saw |
| 07/30/1991 | US5035547 Magnet base drill unit |
| 07/24/1991 | EP0437716A1 Electrically driven handtool |
| 07/18/1991 | DE4000861A1 Hand-held electric power tool e.g. percussion drill - has vibration decoupling of handgrip from motor by using rubber mounts between inner motor casing and outer tool casing |
| 07/17/1991 | EP0437060A2 Dual mode rotary power tool |
| 07/16/1991 | US5031282 Binding strap |
| 07/10/1991 | CA2032208A1 Dual mode rotary power tool with adjustable output torque |
| 07/02/1991 | US5028858 Cordless dual-battery electric tool |
| 07/02/1991 | US5028057 Tool shaft for a tool of the percussive and rotative type |
| 06/26/1991 | CN2079543U Light drilling machine with three bit |
| 06/26/1991 | CN2079542U Multipurpose drilling machine driven by electric-and man-power |
| 06/25/1991 | US5025903 Dual mode rotary power tool with adjustable output torque |
| 06/25/1991 | US5025869 Impact drill |
| 06/18/1991 | US5024565 Hand tool |
| 06/18/1991 | US5024402 Cord restraint |
| 06/13/1991 | WO1991008074A1 A device for releasable connection of two members |
| 05/15/1991 | EP0427510A1 Power tool incorporating a two speed gear system |
| 05/08/1991 | EP0426321A1 Drill having dust collecting device |
| 05/08/1991 | EP0425802A1 Drilling device with percussive and rotative tool |
| 05/02/1991 | DE3934992A1 High safety design of hand drill - has low moment of inertia as lightweight alloy casing contg. body with compressed air motor and rotors made of laminated wood |
| 05/01/1991 | CN2075994U Dust-collecting cover for impact electrical drill |
| 04/30/1991 | US5012057 Trigger switch |
| 04/30/1991 | US5011341 Two speed gear system for power tool |
| 04/25/1991 | DE4033108A1 Drilling rig with lightweight construction - is for drilling holes in concrete ceilings and has chassis mounted with higher output |
| 04/24/1991 | CN2075561U Pipe non-flow-stop hole drilling device |
| 04/18/1991 | WO1991004815A1 Drilling jig |
| 04/16/1991 | US5007776 Controller for boring apparatus |
| 04/13/1991 | CA2000651A1 Hand held drill guide |
| 04/10/1991 | EP0421121A2 Electrically driven hammer |
| 04/09/1991 | US5006022 Axially movable tool and guide |
| 04/09/1991 | US5005295 Portable power driven tool |
| 04/09/1991 | CA1282821C Drill braking system |
| 04/04/1991 | DE4028972A1 Drill support for drilling holes in ceiling - has pneumatic cylinder on bar with lower and upper telescopic bar sections |
| 04/03/1991 | EP0419866A2 Drill hammer |
| 04/03/1991 | CN2074221U Multi-functional miniature electric drill |
| 04/03/1991 | CN2074220U Multi-purpose portable electric drill |
| 03/26/1991 | US5001826 Quick change nose piece for an air-feed peck drill |
| 03/13/1991 | EP0416552A1 Vertical spindle head |
| 03/12/1991 | US4998589 Variable speed drill control cam apparatus |
| 03/12/1991 | US4998588 Hand tool with a shifting gear unit |
| 03/12/1991 | CA1281374C Battery for orthopedic drive assembly |
| 02/28/1991 | DE4022548A1 Hand-held power tool with attached cord - enables high axial force to be applied to tool with cord looped over workpiece |
| 02/28/1991 | DE3927971A1 Hand-held power tool with attached cord - enables high axial force to be applied to tool |
| 02/21/1991 | WO1991001837A1 Portable boring machine |
| 02/20/1991 | CN2071553U Simple electrical hand tool capable of reciprocating drive in straight line |
| 02/20/1991 | CN1049290A Hydraulically-operated stripping device |
| 02/14/1991 | DE3926611A1 Electronic run=up speed limitation esp. for drill - introducing brief delay with low-speed drive for centring purposes in prepn. for full-speed drilling |
| 02/13/1991 | EP0412434A1 Hydraulically actuated severing device |
| 02/13/1991 | CN2071098U Rotatable reciprocation driving hand electric tool |
| 02/05/1991 | US4990037 Portable boring machine |
| 01/30/1991 | EP0321463B1 Mounting for accessory units |
| 01/24/1991 | DE4004464A1 Compact electric hand tool |
| 01/24/1991 | DE4004463A1 Switching device for range of modular electric hand tools - has internal of external manually controlled ring for operating interior switch plate and brush angle for reversing motor |
| 01/23/1991 | CN2069765U Multi-function electric drill |
| 01/22/1991 | US4986554 Tether for a drill chuck key |
| 01/17/1991 | DE3922611A1 Support for power drill making holes in ceiling - consists of telescopic strut with lever to press drill upwards |
| 01/17/1991 | DE3922357A1 Adjustable electropneumatic hammer drill - incorporates system to vary stroke of piston which actuates hammer head |
| 12/27/1990 | EP0403789A1 Drill- or impacthammer |
| 12/13/1990 | WO1990014929A1 Drill or percussion tool with coupling in the percussion drive |
| 12/12/1990 | EP0401294A1 Dual-mode corded/cordless system for power-operated devices |
| 12/05/1990 | CN2066777U Manual/electricity two-purpose drilling machine |
| 12/04/1990 | US4975004 For an apparatus for drilling into energized utility components |
| 11/29/1990 | WO1990014199A1 Power tools |
| 11/29/1990 | DE3916856A1 Locating equipment preventing drilling of concealed metal parts - has circuit detecting low current in lines to drill and metal part and activating current cut=off |
| 11/28/1990 | EP0399714A2 Improvements in or relating to power tools |
| 11/27/1990 | US4972589 Cutting and sanding attachments for a hand drill |
| 11/27/1990 | CA1276816C Chuck key assembly |
| 11/22/1990 | DE3915973A1 Cylindrical boreholes in gas-foamed concrete - are produced by device with shaft and enlarged cylindrical head with rounded end |
| 11/15/1990 | WO1990013385A1 Axially movable tool and guide |
| 11/06/1990 | US4968146 Optical depth measuring device to be mounted on drilling power tool |
| 10/24/1990 | EP0393133A1 Multi-use apparatus for the control of portable power tools |
| 10/18/1990 | DE4011042A1 Locking telescopic tubes together - involves screw which tilts one tube relative to the other |
| 10/04/1990 | DE3910599A1 Drilling and/or percussion hammer |
| 09/04/1990 | US4954026 Screwdriver bit and chuck key retainer |
| 08/14/1990 | US4948304 Adjustable tool guide and driver for a bit |
| 08/09/1990 | DE4000803A1 Hand-held power drill with built-in spirit levels - which indicate when drill is horizontal or vertical |
| 08/08/1990 | CN2060105U Multi-purpose hand tool |
| 08/02/1990 | DE3902656A1 Hand-held drilling apparatus |
| 07/31/1990 | US4944642 Bearing arrangement in rotary machines |
| 07/04/1990 | EP0375917A1 Drilling machine |