A damper providing varying damping force is provided. The damper may include a housing and a rotary member rotatably received the housing. The rotary member may rotate within the housing between defined end points of travel to define an angular range of travel of the rotary member. An outermost surface of the rotary member may be spaced inwardly from an inner surface of the housing defined between the end points of travel to define a gap between the outermost surface of the rotary member and the inner surface of the housing throughout the angular range of travel. The gap may vary in dimension depending on a rotational position of the rotary member to provide varying damping rates within the angular range of travel of the rotary member.

A speed retarding device for a rotary nozzle includes a hollow cylindrical housing and a rotatable tubular shaft rotatably carried by the housing. The shaft has a central axial bore and an enlarged drag sleeve portion carried in the housing. A pair of support bearings support the drag sleeve portion of the shaft in the housing. An annular inner seal between each of the support bearings and the drag sleeve portion defines a cavity within the housing receiving a viscous fluid confined within the cavity. The drag sleeve portion includes a peripheral helical groove and a plurality of axial bores extending therethrough parallel to the central bore, one or more blind axial bores each having a closed end an open end, and a piston disposed in each of the one or more blind axial bores each defining an air space between the closed end and the piston.

A speed retarding device for a rotary nozzle includes a hollow cylindrical housing and a rotatable tubular shaft rotatably carried by the housing. The shaft has a central axial bore and an enlarged drag sleeve portion carried in the housing. A pair of support bearings support the drag sleeve portion of the shaft in the housing. An annular inner seal between each of the support bearings and the drag sleeve portion defines a cavity within the housing receiving a viscous fluid confined within the cavity. The drag sleeve portion includes a peripheral helical groove and a plurality of axial bores extending therethrough parallel to the central bore, one or more blind axial bores each having a closed end an open end, and a piston disposed in each of the one or more blind axial bores each defining an air space between the closed end and the piston.

There is provided a rotary damper of which size can be easily reduced. The rotary damper (100) includes a housing (101). The housing (101) includes a rotor (120) in a bottomed cylindrical housing body (102), and is closed by a lid (140). An inner chamber (103) in the housing body (102) is divided into three cells including a first cell R1, a second cell R2, and a third cell R3 by a fixed vane (104) and movable vanes (124, 125) of the rotor (120). At the rotor (120), a cylindrical tubular support portion (122) is formed inside the movable vanes (124, 125). The lid (140) is formed with a cylindrical first rotor support portion (141) turnably supporting the tubular support portion (122). The first rotor support portion (141) supports the tubular support portion (122) at a center portion of the length of each of the movable vanes (124, 125) in an axial direction of the rotor (120).

The present disclosure relates to a shock absorber with hydraulic load regulation with a rod ending in a pin, which incorporates a longitudinal channel such that the shock absorber includes a frequency amplifier which, in turn, includes a housing, a floating piston which slides along the inside of the housing achieving a seal, and a pressure control valve, wherein the pressure control valve is configured to open when the amplifier chamber reaches a certain pressure level, enabling the outlet of fluid from the amplifier chamber such that the pressure of the amplifier chamber acts on the floating piston, which moves to regulate the flow of fluid through the piston by means of an elastic element acting on valves.

An apparatus may have a casing defining an inner cavity delimited at least by a circumferential surface portion between a pair of lateral surface portions. A shaft passes through the inner cavity of the casing. A wiper arm rotates with the shaft, the wiper arm having a free end in close proximity to the surface portions of the inner cavity of the casing, the free end of the wiper arm having a contour complementarily corresponding to a profile of the circumferential surface portion of the inner cavity. A dam divides the inner cavity in chambers adapted to accommodate a fluid, with movements of the wiper arm changing the volume of the chambers, whereby the apparatus is configured to allow the fluid to flow between the chambers to oppose the force to the given motions. A cover plate(s) is connected to a lateral side of the casing and defining at least one outer chamber around the at least one end of the shaft and exteriorly of the inner cavity.

A human-powered vehicle control device is provided for suitably controlling a rotation state of a wheel of a human-powered vehicle. The human-powered vehicle control device includes a first detector and an electronic controller. The first detector is configured to detect information related to a driving force of the wheel of the human-powered vehicle on a road surface. The electronic controller is configured to change an operation state of a suspension device of the human-powered vehicle in response to a detection result of the first detector.

A control system for a human-powered vehicle includes a suspension device, at least one detector, an electronic controller. The suspension device includes a first suspension and a second suspension. The at least one detector is configured to detect information related to at least two conditions of the human-powered vehicle. The conditions include an operating state of the suspension device, a power input to the human-powered vehicle, a torque of a power transmission component, and a rotating state of the power transmission component. The electronic controller is configured to selectively control the suspension device between a first operating state and a second operating state in accordance with a detection result obtained by the at least one detector.

An actuator provided with a motor for moving an output arrangement, the actuator including both an output lever and a fusible connection that acts up to a mechanical torque threshold to constrain the output arrangement and the output lever to move together in rotation about an axis of rotation. The actuator also includes a fluid damper device housed between the output lever and the output arrangement to act, following rupture of the fusible connection, to damp movement of the output lever relative to the output arrangement in rotation about the axis of rotation.

A rotary damper includes a lid (130) that closes an opening of a case (110), a protrusion (131) formed on the lid (130), and a groove (114) having an arc shape formed on the case (110). A bottom surface of the groove (114) has a gradient. The protrusion (131) moves in the groove (114) while contacting the bottom surface of the groove (114), thereby displacing the lid (130).