Prosthesis socket direct casting device having multiple compression chambers

A prosthesis socket direct casting device comprising:

• a base having a forward side;
• an elongated flexible annular bladder defining an interior casting area carried by the base and extendable from the forward side thereof;
• said bladder containing a plurality of circumferentially spaced expandable chambers extending generally along the length of the casting area;
• said chambers comprising closed interior volumes defined at least in part by inner walls extendable radially inwardly towards the a casting area;
• said base including at least one pressurized fluid supply passage in communication with the interior volumes of said chambers;
• said bladder having an open end opposite the end connected to the base;
• said open end providing access to the casting area;
• said bladder having an outer periphery with a distension limiting structure associated with at least one of the inner walls, the distension limiting structure preventing radially outward distension of the bladder to thereby maintain the outer periphery generally constant when the chambers are in both expanded and non-expanded conditions.