Vehicle suspension damper

A vehicle suspension damper for providing a variable damping rate, said vehicle suspension damper comprising:

• a first damping mechanism having a variable first threshold pressure;
• a first fluid chamber to which a portion of said first damping mechanism abuts, said first fluid chamber having damping fluid disposed therein;
• a second damping mechanism having a second threshold pressure;
• a second fluid chamber separate from said first fluid chamber, said second fluid chamber configured for receiving a portion of said damping fluid;
• a first and second flow path between said first and second fluid chambers, respectively, wherein said damping fluid flows through said first and second flow paths,
• wherein said second damping mechanism comprises:
• a variable damper enclosing a fillable chamber, said variable damper comprising:
• a valve inner;
• and
• a movable valve outer, said movable valve outer engaging portions of said valve inner, said movable valve outer configured for selectively obstructing said second flow path running between a first portion of said damping fluid chamber and a second portion of said damping fluid chamber in response to a state of a compression of said vehicle suspension damper, wherein said fillable chamber creates a gap between said valve inner and said movable valve outer;
• and
• a shaft configured for moving further into said first fluid chamber during a compression stroke of said vehicle suspension damper, during which time a differential pressure between said damping fluid and said fillable chamber drives said movable valve outer and said valve inner more tightly together axially, thereby causing said gap to become partially closed, wherein as said gap becomes said partially closed, said movable valve outer increases a closure force against said second flow path, such that as said shaft moves further into said first fluid chamber, said increasing closure force applied against said second flow path by said movable valve outer creates an increasing difficulty for said vehicle suspension damper to compress.