Expandable diameter fastener

A fastener system comprising;

• a bolt-lock having an internal bore extending from a first side to a second side;
• a threaded shaft having a shaft head, and at least a portion of the shaft extending through the internal bore;
• a threaded sleeve engaging a portion of the threaded shaft;
• a generally cylindrical collar assembly surrounding a portion of the threaded sleeve and constrained by a portion of the threaded sleeve;
• wherein the collar assembly includes at least:
• a first male collar having a first male collar first angled surface having a first male collar first angled surface length;
• a first female collar adjacent the first male collar, and having a first female collar length, a first female collar first entrance surface with a first female collar first entrance surface length, and a first female collar second entrance surface with a first female collar second entrance surface length;
• a second male collar adjacent the first female collar, and having a second male collar first angled surface having a second male collar first angled surface length, a second male collar second angled surface having a second male collar second angled surface length, and an overall second male collar length;
• a second female collar adjacent the second male collar, and having a second female collar first entrance surface with a second female collar first entrance surface length, and a second female collar length;
• wherein the first female collar and the second female collar each have a slit extending throughout their length with a slit width, the first female collar has a first female collar maximum sidewall thickness, and the slit width is greater than the first female collar maximum sidewall thickness;
• wherein the second male collar first angled surface length is less than the first female collar first entrance surface length, and the second male collar second angled surface length is less than 50% of the second female collar length;
• wherein the second male collar second angled surface length is less than the second female collar entrance surface length, and the second male collar first angled surface length is less than 50% of the second female collar length;
• wherein an outer diameter of the first female collar, the first male collar, the second female collar, and the second male collar are substantially equal prior to radially expansion;
• and
• wherein rotation of the threaded shaft moves the threaded sleeve toward the shaft head and compressing the collar assembly from a relaxed state to a compressed state and resulting in sliding engagement of a portion of (a) the first male collar first angled surface and the first female collar first entrance surface, (b) the first female collar second entrance surface and the second male collar first angled surface, and (c) the second male collar second angled surface and the second female collar first entrance surface, thereby radially expanding at least a portion of the first female collar and the second female collar.

A fastener system comprising;

• a bolt-lock having an internal bore extending from a first side to a second side;
• a threaded shaft having a shaft head, and at least a portion of the shaft extending through the internal bore;
• a threaded sleeve engaging a portion of the threaded shaft;
• a generally cylindrical collar assembly surrounding a portion of the threaded sleeve and constrained by a portion of the threaded sleeve;
• wherein the collar assembly includes at least:
• a first male collar having a first male collar first angled surface having a first male collar first angled surface length;
• a first female collar adjacent the first male collar, and having a first female collar length, a first female collar first entrance surface with a first female collar first entrance surface length, and a first female collar second entrance surface with a first female collar second entrance surface length;
• a second male collar adjacent the first female collar, and having a second male collar first angled surface having a second male collar first angled surface length, a second male collar second angled surface having a second male collar second angled surface length, and an overall second male collar length;
• a second female collar adjacent the second male collar, and having a second female collar first entrance surface with a second female collar first entrance surface length, and a second female collar length;
• wherein the first female collar and the second female collar each have a slit extending throughout their length with a slit width;
• wherein an outer diameter of the first female collar, the first male collar, the second female collar, and the second male collar are substantially equal prior to radially expansion;
• and
• wherein rotation of the threaded shaft moves the threaded sleeve toward the shaft head and compressing the collar assembly from a relaxed state to a compressed state and resulting in sliding engagement of a portion of (a) the first male collar first angled surface and the first female collar first entrance surface, (b) the first female collar second entrance surface and the second male collar first angled surface, and (c) the second male collar second angled surface and the second female collar first entrance surface, thereby radially expanding at least a portion of the first female collar and the second female collar.