Methods and apparatus for managing pressurized gas in fluid dampers
AssigneeFox Factory, Inc.
InventorJohn Marking
Life of this patent
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Abstract
A method and apparatus for a shock absorber having a damping fluid compensation chamber with a gas charge. In one aspect, a partition separates a first chamber portion from a second chamber portion, wherein the first portion of the chamber is at a first initial gas pressure and the second portion of the chamber is at a second initial pressure. A valve separates the first and second chamber portions and opening the valve comingles the first and second chamber portions so that the combined chamber portions are at a third pressure. In another aspect, a piston disposed through a wall is in pressure communication with the gas charge and is biased inwardly toward a pressure of the charge, whereby an indicator is movable by the piston in response to the pressure.
Claims1
A damper for use with a suspension system, the damper comprising:
- a fluid-filled chamber for receiving a piston and rod;
- a reservoir in fluid communication with the chamber, the reservoir having a fluid portion and a compressed gas portion;
- a pre-charge portion separated from the compressed gas portion by a partition;
- and
- a valve for selectively communicating a predetermined pressure of a volume of gas in the pre-charge portion with a volume of the compressed gas portion.
Dependencies are inferred from the claim text.