Methods and apparatus for lubricating suspension components
View Patent ↗Methods and apparatus for lubricating suspension seals by pumping fluid to the seals using a compression or rebound action of a suspension component.
1. A method for lubricating a suspension comprising:
operating a suspension in at least one of compression or rebound;
pumping a fluid in response to said operating;
delivering said fluid to a predetermined location of said suspension;
lubricating at least one component of said suspension with said fluid, wherein said pumping comprises:
creating a dynamic first pressure in a first fluid chamber, in response to a compression of said suspension, said first pressure greater than a second pressure at said predetermined location, wherein said predetermined location comprises a region proximate a seal of said suspension and wherein said predetermined location and said seal are positioned on an outer surface of a leg tubing of said suspension, wherein said first pressure being greater than said second pressure causes a flow of said fluid to move from said first fluid chamber to said predetermined location;
checking fluid flow along a first flow path from said first fluid chamber to said predetermined location and thereby limiting flow from said predetermined location to said first fluid chamber along said first flow path;
retaining said fluid at a foam ring within said predetermined location until said foam ring becomes saturated and excess fluid of said fluid begins to flow away from said foam ring; and
lubricating said predetermined location with said excess fluid, such that said excess fluid continues lubricating within said predetermined location at a relatively constant rate and said lubricating is not dependent on fluid surges that become available during said compression.
2. The method of claim 1 , wherein said at least one component comprises a seal.
3. The method of claim 1 , wherein said pumping a fluid in response to said operating comprises pumping a damping fluid from a damping fluid reservoir to a region proximate a seal of the suspension and distributing said damping fluid to a surface of said seal.
4. The method of claim 3 , further comprising:
increasing said pressure in said fluid reservoir by utilizing an end cap coupled with a first suspension member of said suspension, said end cap restricting a flow of said fluid in a first direction; and
causing incursion of said first suspension member into said fluid reservoir.
5. The method of claim 1 , wherein said pumping a fluid in response to said operating comprises:
in response to said operating, pumping said fluid through a wall of a bushing positioned along a fluid flow path of said suspension, between an outer surface and an inner surface of said bushing.
6. The method of claim 1 ,
wherein said predetermined location comprises a region and further comprising delivering the fluid from said region to said at least one component.
7. The method of claim 1 , wherein said pumping comprises creating said dynamic first pressure in a first fluid chamber proximate said predetermined location wherein said predetermined location comprises a region proximate a seal of said suspension, in response to an extension of said suspension, such first pressure greater than a second pressure of a damping fluid volume of said suspension.
8. The method of claim 7 , further comprising checking fluid flow along a second flow path from said predetermined location to said first fluid chamber and thereby limiting flow from said predetermined location to said first fluid chamber along said second flow path.