E21D15/24 - CPC Classification Index

ClassID:

136093 ⎘

E21D15/24 - 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 with axial screw-and-nut, rack-and-worm, or like mechanism

Sub-classes:

E21D15/26 » with screw, worm, or the like, not self-locking but normally prevented from rotation by friction members which slip upon excessive pressure 0

Recent Application in this class:

20240247506

2024-07-25

IMPROVED PROP ASSEMBLIES

20120027529

2012-02-02

Mine Support Having a Linearly Moveable and/or Pivoting End Plate

20080240868

2008-10-02

Mine support having a linearly moveable and/or pivoting end plate

20050271481

2005-12-08

Method for joining the functional parts of hydraulic or pneumatic working devices, and joining connection