Interlocking mechanism for extendable urinary catheter products

A urinary catheter that has a collapsed configuration and an extended configuration, comprising:

• a proximal tube having a proximal insertion end portion and a distal interlocking end portion, the proximal tube including at least one drainage opening in the proximal insertion end portion and a lumen extending from the at least one drainage opening to the distal interlocking end portion;
• a distal tube having a distal drainage end portion, a proximal interlocking end portion and a lumen extending from the proximal interlocking end portion to the distal drainage end portion;
• wherein the proximal tube is displaceably arranged in the lumen of the distal tube such that the proximal tube and distal tube can be moved relative to each other from a collapsed configuration to an extended configuration;
• an interlocking mechanism comprising a first interlocking member and a second interlocking member that engage to lock the proximal and distal tubes in the extended configuration;
• the first interlocking member being associated with the distal interlocking end portion of the proximal tube, the first interlocking member including a body having a proximal end, a distal end and a generally tubular shape having a longitudinal axis, at least one radially extending latch extending from the body of the first interlocking member;
• the second interlocking member being associated with the proximal interlocking end portion of the distal tube, the second interlocking member including at least one keeper;
• and
• wherein when the proximal and distal tubes are moved into the extended configuration, the at least one radially extending latch of the first interlocking mechanism and the keeper of the second interlocking mechanism engage to lock the proximal and distal tubes in the extended configuration and prevent the proximal and distal tubes from moving to the collapsed configuration.