The internal diameter measurement device is inserted into a cavity to measure its internal diameter. The internal diameter measurement device includes: a tubular sheath inserted into the cavity; a balloon which is provided on a distal end portion of the sheath, and is capable of expanding by supplying...http://www.google.fr/patents/US20090178289?utm_source=gb-gplus-shareBrevet US20090178289 - INTERNAL DIAMETER MEASUREMENT DEVICE
Numéro de demande: 12/352,070 Numéro de publication: US 2009/0178289 A1 Date de dépôt: 12 janv. 2009 Brevet délivré: US7856730 ( Date de délivrance 28 déc. 2010)
