Fork Chassis Air Bleeder

The air bleeder assembly in the upper portion of the bicycle fork addresses pressure issues in air-sprung suspension systems by allowing controlled air release, improving performance and durability through the use of pull knobs and automatic bleed functionality.

JP2026510462APending Publication Date: 2026-04-06PUSH IND
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Patent Information

Application Number
JP2025553992
Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
Priority Date
2023-03-13
Filing Date
2024-03-13
Publication Date
2026-04-06

AI Technical Summary

Technical Problem

Existing bicycle fork designs with air-sprung suspension systems face issues due to pressure changes in the non-spring cavity affecting suspension characteristics, leading to increased friction and performance degradation, and existing bleeder valves are prone to leakage, damage, and user inconvenience.

Method used

The air bleeder assembly is located in the upper stationary portion of the fork, allowing air to escape from sealed cavities through pull knobs on the chassis crown, preventing oil leakage and reducing damage, with automatic bleed functionality to maintain optimal pressure.

Benefits of technology

The solution effectively maintains consistent suspension performance by equalizing pressure, reducing friction, and enhancing user accessibility and durability of the bleeder system.

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Abstract

The fork assembly (100) includes a linearly fixed tube (110) and a linearly moving stanchion (116). The air bleed mechanism (128) is located within the upper portion of the fork assembly (100), preferably within the chassis crown (106) of the fork assembly (100). The air bleed mechanism (128) is configured to allow for the equalization of pressure between an internal cavity (306) located within the linearly fixed tube (110) and / or the linearly moving stanchion (116).
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