CPC Definition - Subclass B25D
This place covers:
- Hand tools for carrying out strokes, e.g. hammers or picks.
- Hand tools for transmitting strokes, e.g. chisels or punches.
- Portable power-driven percussive tools with fluid-pressure drive, electromotor drive or electromagnetic drive, e.g. compressed-air hammers.
- Portable percussive tools using centrifugal or rotary impact elements for axial percussion.
- Portable percussive machines with superimposed rotation, e.g. drill hammers.
- Details of, or accessories for, portable power-driven percussive tools.
- Mortise chisels for wood-working are classified in the group B25D 3/00, rather than in the group B27G 17/00.
This subclass is a function-oriented place for classifying percussive hand tools and portable power-driven percussive tools, the primary function of which is to generate percussive action.
Hand tools and portable power-driven tools with percussive action for supporting another primary function, e.g. cutting, are classified in the relevant places for the primary function. For example, hand-held cutting tools employing percussive action for cutting, such as axes or hatchets, are classified in B26B 23/00. However, impact drilling machines with percussive action for supporting the drilling operation are classified in B25D 11/00, B25D 16/00 and/or B25D 17/00.
Hand tools and portable power-driven tools with percussive action which are specially adapted or used for a particular purpose are classified in the relevant application-oriented places. For example, hand tools especially for nailing or stapling are classified in subclass B25C, e.g. nail punches. Pick hammers and chisels especially for mining or quarrying are classified in E21C 37/24 and E21C 37/26.
This place does not cover:
Forging; Hammering; Pressing metal; Riveting; Forging furnaces | |
Hand-held or like portable drilling machines, e.g. drill guns; Equipment therefor | |
Operator-supported drilling machines or devices | |
Percussion drilling |
Attention is drawn to the following places, which may be of interest for search:
Non-abrasive sharpening devices for scythes, sickles, or the like with percussive tools | |
Hand-operated implements for threshing | |
Meat pounders | |
Carpet beaters | |
Instruments for medical or veterinary examination by percussion | |
Emergency hammer to break car windows | |
Golf clubs | |
Bats, rackets, or the like, for other games | |
Disintegrating by mills having rotary beater elements | |
Processes or apparatus for generating mechanical vibrations making use of mechanical energy | |
Removing local distortions | |
Deforming sheet metal, tubes or profiles by sequential impacts, e.g. hammering | |
Forging machines with hammers or die jaws acting by impact | |
Tools for drilling machines | |
Twist drills | |
Treating or finishing surfaces by hammering | |
Impact wrenches or screwdrivers | |
Portable power-driven screw or nut setting or loosening tools with means for imparting impact to screwdriver blade or nut socket | |
Hand tools for fitting together or separating parts employing impacting means | |
Hand-held nailing or stapling tools | |
Combination or multi-purpose hand tools not otherwise provided for | |
Axes or hatches | |
Working stone or stone-like materials by impact tools, e.g. by chisels | |
Machines or apparatus for embossing decorations or marks | |
Knocking devices for preventing bridge formation in large containers | |
Tamping apparatus for consolidating or finishing laid-down unset paving material | |
Tampers for compacting soil | |
Methods or apparatus for placing sheet pile bulkheads, piles, mould-pipes, or other moulds by driving | |
Percussion drilling of earth or rock | |
Fishing for or freeing objects in boreholes or wells using impact means for releasing stuck parts | |
Cutting machines slitting solely by one or more percussive tools moved through the seam in mining or quarrying applications | |
Pick hammers for mining or quarrying, specially adapted for dislodging minerals | |
Chisels for mining or quarrying | |
Ice picks | |
Percussion or firing pins or hammers of firearms | |
Batons, truncheons, sticks, shillelaghs | |
Percussive musical instruments | |
Clappers or other strikers for bells |
In this place, the following terms or expressions are used with the meaning indicated:
Hand hammer | Hand tool for carrying out a stroke with a striking face which is not intended to penetrate the material or object to be struck. |
Pick | Hand tool for carrying out a stroke with a pointed striking tip or edge which is intended to penetrate the material or object to be struck. |
This place covers:
Hand hammers, e.g. with details of hammer head, shock-absorbing means, etc. Examples:
Withdrawing or holding nails, B25D 1/04 (US2007/089571 A)
Shock-absorbing means, B25D 1/12 (US2007/113709 A)
Impacting head in the form of a sleeve slidable on a shaft, B25D 1/16 (US2007/181320 A)
This place covers:
Means for driving the impulse member in a portable percussive tool with fluid-pressure drive, e.g. air pressure, internal-combustion engine, detonation of a cartridge, hydraulic pressure. Control devices for the reciprocating piston, details of valve arrangements therefore. Examples:
Tool bit is hit by an impulse member, B25D 9/04 (EP0836545 A)
(EP1907141 A)
Automatic stopping when the tool is lifted from the working face, B25D 9/265
(EP0617926 A)
Attention is drawn to the following places, which may be of interest for search:
Portable non-percussive drilling tools driven by fluid pressure or pneumatic power | |
Control systems for adjusting the stroke of the piston, or the force or frequency of impact thereof, adapted for earth drilling |
This place covers:
Means for driving the impulse member in a portable percussive tool with electromotor drive, e.g. wobbling mechanism, electromagnetic drive, centrifugal or rotary impact elements, worm mechanism, cam mechanism, crank mechanism. Examples:
Wobbling mechanism / swash plate, B25D 11/062 (EP2129494 A)
Electromagnetic drive, B25D 11/064 (EP2036680 A)
Worm mechanism, B25D 11/08 (US2051053 A)
Cam mechanism, coaxial cam member and cam follower of the same shape, B25D 11/106 (FR2868977 A)
Crank mechanism with fluid cushion, B25D 11/125 (WO2004060615 A)
This place does not cover:
Portable power-driven tools with rotary impact |
In this place, the following terms or expressions are used with the meaning indicated:
Cam mechanism | Comprising a rotating cam member which might be coaxial with the tool, and interacting with a cam surface defined by rollers, balls, or the same shape as the cam member. |
Crank mechanism | Comprising a rotating plate, an offset pin, a crank arm, a piston, and optionally a fluid cushion. |
Wobbling mechanism | Comprising a swash-plate, attached to a rotating shaft with a slight angular displacement, and provoking an oscillating linear movement of a follower |
Worm mechanism | A continuous guide surface with steadily rising and falling incline |
This place covers:
Also clutches and mode changers specially adapted for portable percussive machines with superimposed rotation. Example:
Mode changer, B25D 16/006 (GB2472890 A)
Attention is drawn to the following places, which may be of interest for search:
Gear boxes, clutches, bearings, feeding mechanisms or like equipment for hand-held portable drilling machines | |
Gearings, speed selectors, clutches or the like specially adapted for rotary tools |
This place covers:
Attachments or adapters, percussive tool bits, constructional details.
Illustrative example of subject matter classified in this group:
Handles resiliently mounted relative to the hammer housing, B25D 17/043
Means for retaining and guiding the tool bit, with radial movable locking elements, B25D 17/088
Damping the reaction force, B25D 17/24
This place does not cover:
Details or components, e.g. casings, bodies, of portable power-driven tools not particularly related to the operation performed |
Attention is drawn to the following places, which may be of interest for search:
Drill bits for rotation and/or percussion | |
Dampers in connections of hammers to backhoes; connections of hammers to backhoes | |
Drill bits for earth drilling | |
Exhaust silencers in general | |
Lubricating in general | |
Noise damping in general |