ClassID:

136090

E21D15/18 - 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 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

Recent Application in this class: