Suspension system
View Patent ↗A compression assembly/system for a front suspension fork for a bicycle is disclosed. The compression assembly/system of the front suspension fork may comprise a combination of improved functional assemblies including a hydraulic bottom-out assembly/mechanism and a low-speed compression assembly/mechanism and a high-speed compression assembly/mechanism. The compression assembly/system of the front suspension fork may comprise an externally-adjustable hydraulic bottom-out mechanism; and substantially co-located external adjustment controls for bottom-out mechanism and low-speed compression mechanism and high-speed compression mechanism. The compression assembly/system may also comprise an axially-oriented (compression) mechanism configured to transmit movement/adjustment radially from inner components to outer components of the mechanisms to be adjusted.
1. A suspension assembly configured for use on a wheeled vehicle such as a bicycle subjected to a cycle of compression and rebound during use comprising:
(a) a housing;
(b) a damping assembly configured to operate with a spring assembly in a range of travel between substantially full compression and substantially full extension and to provide a damping effect for the cycle of compression and rebound;
(c) a bottom-out system configured to provide for bottom-out to occur at full compression;
(d) an adjustment actuator for the bottom-out system positioned outside of the housing configured to allow adjustment between a substantially open setting and a substantially closed setting;
wherein the cycle of compression and rebound comprises in the range of travel (a) shortening during compression and (b) transition from compression to rebound and (c) lengthening during rebound; and
wherein the bottom-out system comprises a cup and a piston and wherein the piston is configured to enter the cup during compression and to exit the cup during rebound;
wherein the bottom-out system comprises at least one port and a flow area and the flow area becomes obstructed as the piston travels in the cup; and
wherein the at least one port is obstructed as the piston travels in the cup.
2. The suspension assembly of claim 1 wherein the bottom-out system configured within the housing to operate with the damping assembly to provide an increase in damping effect only for a portion of compression approaching bottom-out in the cycle of compression and rebound.
3. The suspension assembly of claim 2 wherein the damping assembly comprises a hydraulic fluid and the bottom-out system comprises a port of the at least one port; the port is substantially open to flow of the hydraulic fluid when the adjustment actuator is in the open position and is substantially closed to flow of hydraulic fluid when the adjustment actuator is in the closed position.
4. The suspension assembly of claim 2 wherein the at least one port of the bottom-out system comprises a set of ports.
5. The suspension assembly of claim 4 wherein the cup comprises the set of ports.
6. The suspension assembly of claim 5 wherein the set of ports is substantially obstructed at bottom-out.
7. The suspension assembly of claim 4 wherein the bottom-out system comprises a pin actuated by the adjustment actuator to control the flow of hydraulic fluid.
8. The suspension assembly of claim 7 wherein the bottom-out system comprises the pin configured to act on a ball to control the flow of hydraulic fluid.
9. The suspension assembly of claim 8 wherein the pin is configured to retract and disengage the ball when adjusted toward the open setting and to extend and engage the ball to obstruct a flow path when adjusted toward the closed setting.
10. The suspension assembly of claim 4 wherein the set of ports provides the flow area that becomes obstructed as the piston travels in the cup.
11. The suspension assembly of claim 10 wherein the flow area is substantially obstructed at bottom-out.
12. The suspension assembly of claim 2 wherein the increase in damping effect near bottom-out is adjusted by the adjustment actuator.
13. The suspension assembly of claim 2 wherein the adjustment actuator can be adjusted from exterior to the housing without the use of a tool.
14. The suspension assembly of claim 2 wherein the damping assembly comprises a compression assembly and a rebound assembly.
15. A suspension assembly configured for use on a wheeled vehicle such as a bicycle subjected to a cycle of compression and rebound during use comprising:
(a) a housing;
(b) a damping assembly configured to operate in a range of travel between substantially full compression and substantially full extension and to provide a first damping effect for the cycle of compression and rebound;
(c) a bottom-out system; and
(d) an adjustment actuator for the bottom-out system positioned outside of the housing configured to allow adjustment between a substantially open setting and a substantially closed setting;
wherein the bottom-out system provides a second damping effect for only a portion of travel near full compression;
wherein the bottom-out system comprises a cup and a piston and wherein the piston is configured to enter the cup during compression and to exit the cup during rebound; and
wherein the bottom-out system comprises at least one port and a flow area and the flow area becomes obstructed as the piston travels in the cup; and
wherein the at least one port is obstructed as the piston travels in the cup.
16. The suspension assembly of claim 15 wherein the damping assembly comprises a hydraulic fluid and the at least one port of the bottom-out system comprises a port.
17. The suspension assembly of claim 16 wherein the port is substantially open to flow of the hydraulic fluid when the adjustment actuator is in the open position and is substantially closed to flow of the hydraulic fluid when the adjustment actuator is in the closed position.
18. The suspension assembly of claim 15 wherein the cup comprises a set of ports; and wherein the at least one port of the bottom-out system comprises the set of ports.
19. The suspension assembly of claim 15 wherein the bottom-out system comprises a pin actuated by the adjustment actuator to control the flow of hydraulic fluid.
20. The suspension assembly of claim 19 wherein the bottom-out system comprises the pin configured to act on a ball to control the flow of hydraulic fluid.
21. The suspension assembly of claim 20 wherein the pin is configured to retract and disengage the ball when adjusted toward the open setting and to extend and engage the ball to obstruct a flow path when adjusted toward the closed setting.
22. The suspension assembly of claim 15 wherein the adjustment actuator can be adjusted from exterior to the housing without the use of a tool.
23. The suspension assembly of claim 15 wherein the second damping effect is adjusted by the adjustment actuator.
24. The suspension assembly of claim 15 wherein the damping assembly comprises a compression assembly and a rebound assembly.