CPC Subgroup
E21D 15/28 with parts held relatively to each other by friction or gripping
Full Title
Props (in the building art E04G25/00); Chocks > Telescopic props (general means for fixing telescopic parts together ) > with parts held relatively to each other by friction or gripping
9 direct subcodes
Child Classifications
Navigate with arrow keys, Enter to open
- E21D 15/30 by means expanded or contracted by pressure applied through the medium of a fluid or quasi- fluid, e.g. rubber
- E21D 15/32 by a deformable collar
- E21D 15/34 by axially- moving balls, rollers, or the like
- E21D 15/36 by a tiltable collar surrounding one or both parts
- E21D 15/38 with longitudinally-divided upper or lower prop parts, e.g. interfitting laminations
- E21D 15/40 Collar or other support gripped to one or both parts by toggle-action, cam, or other member pivoted or similarly mounted
- E21D 15/42 with special parts to influence the friction
- E21D 15/43 Details of wedges (friction linings or pads E21D15/42)