Extractor for stripping pipes and other hollow parts from moulds and similar operations

Claim 1

An extractor for extracting a tube or other hollow part having an inner face from a mould, the extractor comprising a fixed support, a jaw carrier mounted on said fixed support, a plurality of jaw structures carried by said jaw carrier and arranged symmetrically about an axis, each jaw structure being movable away from said axis from a first position to a second position independently of the others of said jaw structures, a fluid-actuable device mounted on said jaw carrier and comprising wall means defining a chamber, portions of said wall means being respectively engageable with said jaw structures, each of said wall means portions being movable radially of said axis independently of the others of said portions of said wall means between an inner position in which the corresponding jaw structure is allowed to move to said first position and an outer position in which the corresponding jaw structure is in said second position, resiliently yieldable means combined with said jaw structures to bias said jaw structures toward said first positions, and means for supplying fluid under pressure to said chamber whereby said portions of said wall means are exposed to the pressure of said fluid and urged toward said outer positions and urge the jaw structures toward said second positions against said inner face for extracting said tube from said mould.