CPC Definition - Subclass B25D

Last Updated Version: 2017.08
PERCUSSIVE TOOLS {(percussive machines for forging B21J; hand-held drilling machines, in general B23B 45/00, for wood B27C 3/08; drilling machines, used for mining or quarrying, with reciprocating tool which is turned intermittently when out of contact with the working face E21B 1/00)}
Definition statement

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.
Relationships with other classification places

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. Mortise chisels for wood-working are classified in B27G17/08.

References
Limiting references

This place does not cover:

Non-abrasive sharpening devices for scythes, sickles, or the like with percussive tools

A01D 3/02

Hand-operated implements for threshing

A01F 5/00

Meat pounders

A22C 9/00

Carpet beaters

A47L 13/36

Instruments for medical or veterinary examination by percussion

A61B 9/00

Drill bits for combined rotation and percussion

B23B 51/00, B23B 51/02

Hand-held nailing or stapling tools

B25C

Combination or multi-purpose hand tools not otherwise provided for

B25F 1/00

Mortise chisels for wood-working

B27G17/08

Machines or apparatus for embossing decorations or marks

B44B 5/00

Pick hammers for mining or quarrying, specially adapted for dislodging minerals

E21C 37/24

Chisels for mining or quarrying

E21C 37/26

Informative references

Attention is drawn to the following places, which may be of interest for search:

Emergency hammer to break car windows

A62B 3/005

Golf clubs

A63B 53/00

Bats, rackets, or the like, for other games

A63B 59/00

Disintegrating by mills having rotary beater elements

B02C 13/00

Processes or apparatus for generating mechanical vibrations making use of mechanical energy

B06B 1/10

Removing local distortions

B21D 1/06

Deforming sheet metal, tubes or profiles by sequential impacts, e.g. hammering

B21D 31/06

Forging machines with hammers or die jaws acting by impact

B21J 7/00, B21J 11/00

Treating or finishing surfaces by hammering

B23P 9/04

Impact wrenches or screwdrivers

B25B 19/00

Portable power-driven screw or nut setting or loosening tools with means for imparting impact to screwdriver blade or nut socket

B25B 21/02

Hand tools for fitting together or separating parts employing impacting means

B25B27/067

Axes or hatches

B26B 23/00

Working stone or stone-like materials by impact tools, e.g. by chisels

B28D 1/26

Knocking devices for preventing bridge formation in large containers

B65D 88/66

Tamping apparatus for consolidating or finishing laid-down unset paving material

E01C 19/30

Tampers for compacting soil

E02D 3/046

Methods or apparatus for placing sheet pile bulkheads, piles, mould-pipes, or other moulds by driving

E02D 7/00

Percussion drilling of earth or rock

E21B 1/00, E21B 4/06, E21B 6/00, E21B 10/36

Fishing for or freeing objects in boreholes or wells using impact means for releasing stuck parts

E21B 31/107

Cutting machines slitting solely by one or more percussive tools moved through the seam in mining or quarrying applications

E21C 25/02

Ice picks

F25C 5/043

Percussion or firing pins or hammers of firearms

F41A 19/13, F41A 19/14

Batons, truncheons, sticks, shillelaghs

F41B 15/02

Percussive musical instruments

G10D 13/00

Clappers or other strikers for bells

G10K 1/10

Glossary of terms

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.

Hand hammers {(handles therefor B25G 1/00; attachment of handles to the hammer head B25G 3/00)}; Hammer heads of special shape or materials
Definition statement

This place covers:

Hand hammers, e.g. with details of hammer head, shock-absorbing means, etc. Examples:

media0.png

Withdrawing or holding nails, B25D 1/04 (US2007/089571 A)

media1.png

Shock-absorbing means, B25D 1/12 (US2007/113709 A)

media2.png

Impacting head in the form of a sleeve slidable on a shaft, B25D 1/16 (US2007/181320 A)

References
Limiting references

This place does not cover:

Handles for hand hammers

B25G 1/00

Attachment of handles to the hammer head

B25G 3/00

Hand chisels
Definition statement

This place covers:

Hand chisels. Example:

media3.png

B25D 3/00 (US2007/062046 A)

References
Application-oriented references

Examples of places where the subject matter of this place is covered when specially adapted, used for a particular purpose, or incorporated in a larger system:

Mortise chisels for wood-working

B27G17/08

Informative references

Attention is drawn to the following places, which may be of interest for search:

Working stone or stone-like materials by impact tools, e.g. by chisels

B28D 1/26

Centre punches
Definition statement

This place covers:

Centre punches, also automatic. Example:

media4.png

Automatic centre punch, B25D 5/02 (FR1509013 A)

Picks {(combined with other tools B25F)}
Definition statement

This place covers:

Picks. Example:

media5.png B25D 7/00 (US2462427 A)

References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Picks combined with other tools

B25F

Portable percussive tools with fluid-pressure drive, {i.e. driven directly by fluids}, e.g. having several percussive tool bits operated simultaneously {(portable non-percussive drilling tools driven by fluid pressure or pneumatic power B23B 45/04)}
Definition statement

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:

media6.png

Tool bit is hit by an impulse member, B25D 9/04 (EP0836545 A)

media7.png

Piston-type slide valves, B25D 9/18, and tubular-type slide valves, B25D 9/20

(EP1907141 A)

media8.png

Automatic stopping when the tool is lifted from the working face, B25D 9/265

(EP0617926 A)

References
Informative references

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

B23B 45/04

Control systems for adjusting the stroke of the piston, or the force or frequency of impact thereof, adapted for earth drilling

E21B 44/00

Portable percussive tools with electromotor {or other motor} drive
Definition statement

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:

media9.png

Wobbling mechanism / swash plate, B25D 11/062 (EP2129494 A)

media10.png

Electromagnetic drive, B25D 11/064 (EP2036680 A)

media11.png

Worm mechanism, B25D 11/08 (US2051053 A)

media12.png

Cam mechanism, coaxial cam member and cam follower of the same shape, B25D 11/106 (FR2868977 A)

media13.png

Crank mechanism with fluid cushion, B25D 11/125 (WO2004060615 A)

References
Limiting references

This place does not cover:

Portable power-driven tools with rotary impact

B25B 21/02

Glossary of terms

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

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 (combined percussion and rotary drilling adapted for earth drilling E21B 6/00)}
Definition statement

This place covers:

Also clutches and mode changers specially adapted for portable percussive machines with superimposed rotation. Example:

media14.png

Mode changer, B25D 16/006 (GB2472890 A)

References
Informative references

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

B23B 45/008

Gearings, speed selectors, clutches or the like specially adapted for rotary tools

B25F 5/001

Details of, or accessories for, portable power-driven percussive tools {(details or components, e.g. casings, bodies, of portable power-driven tools not particularly related to the operation performed B25F 5/00)}
Definition statement

This place covers:

Attachments or adapters, percussive tool bits, constructional details. Examples:

media15.png

Handles resiliently mounted relative to the hammer housing, B25D 17/043 (WO2007115845 A)

media16.png

Means for retaining and guiding the tool bit, with radial movable locking elements, B25D 17/088 (EP2170562 A)

media17.png

Damping the reaction force, B25D 17/24 (EP1736283 A)

References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Drill bits for rotation and/or percussion

B23B 51/00

Details or components, e.g. casings, bodies, of portable power-driven tools not particularly related to the operation performed

B25F 5/00

Dampers in connections of hammers to backhoes; connections of hammers to backhoes

E02F 3/966

Drill bits for earth drilling

E21B 10/00

Exhaust silencers in general

F01N

Lubricating in general

F16N

Noise damping in general

G10K 11/16