Bicycle suspension system with automatic venting

A bicycle suspension system comprising:

• a first tube comprising a first interior surface and a first exterior surface, wherein the first exterior surface is exposed to an ambient environment at atmospheric pressure;
• a second tube comprising a second interior surface and a second exterior surface, wherein the second tube is telescopically disposed in the first tube with at least a portion of the first interior surface facing and overlapping at least a portion of the second exterior surface, wherein the first and second tubes are telescopically moveable relative to each other, and wherein the first interior surface and the second exterior surface define an interior chamber therebetween having a chamber pressure, wherein a difference between the chamber pressure and the atmospheric pressure defines a pressure differential;
• and
• an intermittent bi-directional flow pathway defined between the interior chamber and the ambient environment, wherein the intermittent bi-directional flow pathway communicates between the interior chamber and the ambient environment when the pressure differential is greater than a first predetermined pressure differential or less than a second predetermined pressure differential, and wherein the intermittent bi-directional flow pathway does not communicate between the interior chamber and the ambient environment when the pressure differential is between the first predetermined pressure differential and the second predetermined pressure differential.

A bicycle suspension system comprising:

• a first tube comprising a first interior surface and a first exterior surface, wherein the first exterior surface is exposed to an ambient environment at atmospheric pressure;
• a second tube comprising a second interior surface and a second exterior surface, wherein the second tube is telescopically disposed in the first tube with at least a portion of the first interior surface facing and overlapping at least a portion of the second exterior surface, wherein the first and second tubes are telescopically moveable relative to each other, and wherein the first interior surface and the second exterior surface define an interior chamber therebetween having a chamber pressure, wherein a difference between the chamber pressure and the atmospheric pressure defines a pressure differential;
• a bi-directional flow pathway between the interior chamber and the ambient environment;
• and
• an air permeable filter preventing flow of a lubricating oil or outside contamination across the bi-directional flow pathway.