E21D15/16 - CPC Classification Index

ClassID:

136089 ⎘

E21D15/16 - CPC Classification

Classification description:

Props ; Chocks, e.g. made of flexible containers filled with backfilling material; Telescopic props with parts held together by positive means, with or without relative sliding movement when the prop is subject to excessive pressure

Sub-classes:

E21D15/18 » with one part resting on a supporting medium, e.g. rubber, sand, bitumen, lead, located in the other part, with or without expulsion or displacement of the medium upon excessive pressure 6
E21D15/20 » with pawl, pin, cross-piece, or the like engaging with ratchet teeth, notches, holes, or the like, spaced apart at intervals 3
E21D15/22 » with member, pin, cross- piece, or the like, ruptured, sheared through, or permanently deformed upon excessive pressure 1
E21D15/24 » with axial screw-and-nut, rack-and-worm, or like mechanism 4

Recent Application in this class:

20170044897

2017-02-16

Telescopic pumpable prop assembly with improved ceiling impact properties