Compensatory expansion bellows and its production

Details Compensatory expansion bellows and its production Compensatory expansion bellows and its production

B - Operations, Transporting

23

P

26/161

B23P 15/00 (2006.01) B21D 15/06 (2006.01)

Patent

CA 1055236

ABSTRACT OF DISCLOSURE Large diameter expanding bellows is described for pipe systems produced by the invention from portable apparatus combining fixed and slidable rings, the former connected on an end of end the latter sealably mounted on a sleeve and a skirt slideable into sealing relationship with the former and connected to the slideable ring, pressure fluid admission means communicating with the annular space between the rings and an outlet for regu- lation of liquid flow therefrom; a sleeve 1 may be strengthened by a core 3 of cement and fitted with a dismountable ring 4 co-opera- tive with a displaceable ring 6 connected to an upper skirt 3 defining a chamber in communication with a pump 15 for introducing fluid in hydroforming to lower fixed ring 4.

272420

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