(0)B28D:0/0:
IPC6
SECTION B - PERFORMING OPERATIONS; TRANSPORTING
WORKING STONE OR STONE-LIKE MATERIALS
B28D
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B 28 D

 WORKING STONE OR STONE-LIKE MATERIALS (machinery for, or methods of, mining or quarrying E 21 C)

 

 

 
 

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/ 00 Working stone or stone-like materials, e.g. brick, concrete, not provided for elsewhere; Machines, devices, tools therefor (fine working of gems, jewels, crystals B 28 D 5/00; working by grinding or polishing B 24 ; devices or means for dressing or conditioning abrasive surfaces B 24 B 53/00)

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/ 02 • by sawing  

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/ 04 • • with circular saw blades or saw discs (B 28 D 1/10 takes precedence)  

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/ 06 • • with reciprocating saw blades (B 28 D 1/10 takes precedence)  

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/ 08 • • with saw blades of endless cutter-type, e.g. chain saws, strap saws (B 28 D 1/10 takes precedence)  

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/ 10 • • with provision for measuring  

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/ 12 • • Saw blades specially adapted for working stone  

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/ 14 • by boring or drilling (rotary drilling machines B 23 B; portable percussive machines B 25 D)  

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/ 16 • by turning  

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/ 18 • by milling, e.g. channelling by means of milling tools  

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/ 20 • by planing, e.g. channeling by means of planing tools  

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/ 22 • by cutting, e.g. incising  

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/ 24 • • with cutting discs  

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/ 26 • by impact tools, e.g. by chisels or other tools having a cutting edge (portable percussive machines B 25 D)  

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/ 28 • • without cutting edge  

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/ 30 • to form contours, i.e. curved surfaces, irrespective of the method of working used (for artistic purposes B 44 B)  

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/ 32 • Methods or apparatus specially adapted for working materials which can easily be split, e.g. mica, slate, schist  
 

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/ 00 Dressing mill discs or rollers (dressing the tools of sawing machines or sawing devices B 23 D 63/00; treating the cutting members of cutting machines to facilitate cutting B 26 D 7/08)

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/ 02 • Machines  

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/ 04 • • for grooving rollers  
 

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/ 00 Fine working of gems, jewels, crystals, e.g. of semiconductor material; Apparatus therefor (working by grinding or polishing B 24; for artistic purposes B 44 B; by non-mechanical methods C 04 B 41/00; non-mechanical after-treatment of single crystals C 30 B 33/00) [3]

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/ 02 • by rotary tools, e.g. drills  

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/ 04 • by tools other than of rotary type, e.g. reciprocating tools  
 

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/ 00 Accessories specially adapted for use with machines or devices of the preceding groups

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/ 02 • for removing or laying dust, e.g. by spraying liquids; for cooling work  

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/ 04 • for supporting or holding work