B
SECTION B — PERFORMING OPERATIONS; TRANSPORTING
  
SHAPING
 B28
WORKING CEMENT, CLAY, OR STONE
 B28D
WORKING STONE OR STONE-LIKE MATERIALS (machinery for, or methods of, mining or quarrying E21C)
 B28D 1/00
Working stone or stone-like materials, e.g. brick, concrete, not provided for elsewhere; Machines, devices, tools therefor (fine working of gems, jewels, crystals B28D 5/00; working by grinding or polishing B24; devices or means for dressing or conditioning abrasive surfaces B24B 53/00)
 B28D 1/02
·  by sawing
 B28D 1/04
·  ·  with circular saw blades or saw discs (B28D 1/10 takes precedence)
 B28D 1/06
·  ·  with reciprocating saw blades (B28D 1/10 takes precedence)
 B28D 1/08
·  ·  with saw blades of endless cutter-type, e.g. chain saws, strap saws (B28D 1/10 takes precedence)
 B28D 1/10
·  ·  with provision for measuring
 B28D 1/12
·  ·  Saw blades specially adapted for working stone
 B28D 1/14
·  by boring or drilling (rotary drilling machines B23B; percussive tools B25D; earth or rock drilling E21B)  [1,7]
 B28D 1/16
·  by turning
 B28D 1/18
·  by milling, e.g. channelling by means of milling tools
 B28D 1/20
·  by planing, e.g. channeling by means of planing tools
 B28D 1/22
·  by cutting, e.g. incising
 B28D 1/24
·  ·  with cutting discs
 B28D 1/26
·  by impact tools, e.g. by chisels or other tools having a cutting edge (portable percussive machines B25D)
 B28D 1/28
·  ·  without cutting edge
 B28D 1/30
·  to form contours, i.e. curved surfaces, irrespective of the method of working used (for artistic purposes B44B)
 B28D 1/32
·  Methods or apparatus specially adapted for working materials which can easily be split, e.g. mica, slate, schist
 B28D 3/00
Dressing mill discs or rollers (dressing the tools of sawing machines or sawing devices B23D 63/00; treating the cutting members of cutting machines to facilitate cutting B26D 7/08)
 B28D 3/02
·  Machines
 B28D 3/04
·  ·  for grooving rollers
 B28D 5/00
Fine working of gems, jewels, crystals, e.g. of semiconductor material; Apparatus therefor (working by grinding or polishing B24; for artistic purposes B44B; by non-mechanical methods C04B 41/00; non-mechanical after-treatment of single crystals C30B 33/00)  [3]
 B28D 5/02
·  by rotary tools, e.g. drills
 B28D 5/04
·  by tools other than of rotary type, e.g. reciprocating tools
 B28D 7/00
Accessories specially adapted for use with machines or devices of the preceding groups
 B28D 7/02
·  for removing or laying dust, e.g. by spraying liquids; for cooling work
 B28D 7/04
·  for supporting or holding work