Abstract: Provided is a rotary damper on which the timing for generating a damping torque can be set freely. Groove-like bypass passages (805) that are longer in the circumferential direction than vanes (501) are formed in the upper surface (803) of a torque regulation plate (8) arranged on the bottom part (201) of a cylindrical circular chamber (200). When the rotor (5) rotates in a first rotational direction R1, if both end faces (508a, 508b) of the vanes (501) are positioned within a range of the respective bypass passages (805), each area (218) and the corresponding area (217) are communicated via the corresponding bypass passage (805), enabling movement of a viscous fluid (6) from the area (217) to the area (218).

Abstract: Provided is a rotary damper that makes it possible to easily adjust braking torque. A rotary damper that has a partitioning part and first and second adjustment bolts. The partitioning part has: first and second flow paths that connect regions of a partitioned cylindrical chamber; a first insertion hole that connects to the first flow path and to a first adjustment bolt screw hole of a case; and a second insertion hole that connects to the second flow path and to a second adjustment bolt screw hole of the case. The first adjustment bolt is screwed into the first adjustment bolt screw hole and is thereby inserted into the first insertion hole, and the length to which it protrudes into the first flow path can be adjusted. The second adjustment bolt is screwed into the second adjustment bolt screw hole and is thereby inserted into the second insertion hole, and the length to which it protrudes into the second flow path can be adjusted.

Abstract: A damping assembly for a pivoting stowage bin includes a rotary hydraulic damper that is mounted on the pivot axis of the stowage bin. The rotary hydraulic damper includes a damper body that receives a rotor having at least one vane moved through contained hydraulic fluid. Preferably, an exterior bearing surface on the damper precludes the active damping elements from radial loads, while a distributed attachment of the rotor to the pivoting bin enables reduced torque loads. The damper can include an integrated flow-control valve for controlling the opening rate of the pivoting bin as well as an integrated mechanical stop for the bin.

Abstract: A chain tensioning device is basically provided with a main body, a chain guide and a rotary fluid damper unit. The main body is configured to be mounted to a bicycle. The chain guide is pivotally coupled to the main body to rotate around a rotational axis with respect to the main body. The rotary fluid damper unit is operatively connected between the main body and the chain guide to provide rotational resistance to the chain guide around the rotational axis. The rotary fluid damper unit is a separate unit from the main body, the rotary fluid damper unit being detachably mounted on the main body.

Abstract: The invention relates to a pressurized hydraulic rotation damper intended for use on a multiwheeled vehicle. The rotation damper comprises an outer housing and a lid that together enclose a damping-medium-filled main chamber, which chamber is pressurized by a pressure tank and divided by a delimiting blade/arm into two volumes. The damping medium flows between the two volumes in a duct delimited by at least a first valve and a second valve. These valves throttle the flow between the volumes when the blade moves in an inward and outward motion respectively, starting from an intermediate position where the two volumes are substantially equal in size, to an outer position, in which the blade bears against or is placed close to the inner face of the outer housing. The first valve controls the flow for outward motions and the second valve is used to control the flow for inward motions to either pass through the first valve, through the second valve or through both valves.

Abstract: A steering damper can generate a smaller damping force according to a first damping force characteristic or a larger damping force according to a second damping force characteristic by controlling a flow of hydraulic oil during a steering operation of a steering member. When the associated vehicle is running at a relatively low or medium speed and is not accelerating, and if an operational speed of the steering damper is lower than a predetermined value, damping force according to the first damping force characteristic can be generated in the steering damper. On the other hand, when the operational speed of the steering damper is equal to or higher than the predetermined value, damping force according to the second damping force characteristic can be generated in the steering damper.

Abstract: A steering damper comprises two oil chambers (R1, R2) delimited in a housing (1, 7) by a partitioning member (2, 8), and a damping valve (2a, 2b) which imposes a drag on a flow of working oil between the two oil chambers (R1, R2). By further comprising an oil passage (5) connecting the two oil chambers (R1, R2), a pair of check valves (5a, 5b) which prevents oil flow from each of the two oil chambers (R1, R2) into the oil passage (5), and a bypass passage (6) connected to the oil passage (5) between the pair of check valves (5a, 5b) and having an opening that opens onto the interior of the housing (1) in the vicinity of the neutral position of the movable partitioning member (2, 8), the steering damper enables the movable partitioning member (2, 8) to return quickly towards the neutral position.

Abstract: A fluidic stabilizer with remote control having every portion of the circuit which connects the housing and the remote control valve within a range that will permit fluid placed in the circuit to flow freely at high speed but that will also create the fluid pressure necessary for effective damping. Furthermore, the cross-sectional area for every portion of the circuit is maintained within such range, preferably by constructing all portions of the circuit between the housing and the remote control valve with stainless steel braided line. And an attachment structure combined with a depression in the bottom of the rotatable wiper contained within the housing except with an aperture exposing the bottom of the rotatable wiper to the outside facilitates mounted the housing below the handlebars of a vehicle since the depression is constructed with such dimensions as to accommodate a stem nut at the top of a steering shaft.

Abstract: A fluidic stablilizer with remote control having every portion of the circuit which connects the housing and the remote control valve within a range that will permit fluid placed in the circuit to flow freely at high speed but that will also create the fluid pressure necessary for effective damping. Furthermore, the cross-sectional area for every portion of the circuit is maintained within such range, preferably by constructing all portions of the circuit between the housing and the remote control valve with stainless steel braided line. And an attachment structure combined with a depression in the bottom of the rotatable wiper contained within the housing except with an aperture exposing the bottom of the rotatable wiper to the outside facilitates mounted the housing below the handlebars of a vehicle since the depression is constructed with such dimensions as to accommodate a stem nut at the top of a steering shaft.

Abstract: A steering damper comprises two oil chambers (R1, R2) delimited in a housing (1, 7) by a partitioning member (2,8), and a damping valve (2a, 2b) which imposes a drag on a flow of working oil between the two oil chambers (R1, R2). By further comprising an oil passage (5) connecting the two oil chambers (R1, R2), a pair of check valves (5a, 5b) which prevents oil flow from each of the two oil chambers (R1, R2) into the oil passage (5), and a bypass passage (6) connected to the oil passage (5) between the pair of check valves (5a, 5b) and having an opening that opens onto the interior of the housing (1) in the vicinity of the neutral position of the movable partitioning member (2,8), the steering damper enables the movable partitioning member (2,8) to return quickly towards the neutral position.

Abstract: An improved stabilizer for the steering of a vehicle. The stabilizer comprises a housing containing one or more sector-shaped chambers with a wiper rotatably mounted in the housing. For each chamber a paddle extends from the rotor of the wiper into the chamber. The wiper moves sealingly past the housing. For each paddle a bypass channel allows fluid on one side of the paddle to move to the other side of the paddle. A valve in the bypass channel controls the degree of damping produced by the stabilizer. The valve has a control shaft in the center of the rotor, and on the shaft there is a continuous indentation around such shaft with there being no indentation in a first area of the shaft and then the indentation commencing and having an increasingly larger cross-sectional area as the indentation progress around the control shaft.

Abstract: Shock absorber components, such as a radial bypass damper, an anti-cavitation valve (ACV) and an incremental flow metering valve IFMV. The damper is of a continuous, unitary construction with a main hole and auxiliary holes interconnected by passageways. The ACV has openings that angle obliquely relative to entry surfaces of valving shims and extend at an incline continuously through the valving shims. The metering valve linearly regulates flow, substantially independent of piston displacement.

Abstract: In a rotary damper, an outer lid is attached to an outer side surface of a casing. A first oil passage and a second oil passage are in respective communication. A first oil chamber and a second oil chamber are provided in parallel between the outer side surface of the casing and the inner side surface of the outer lid. A first check valve is provided in the first oil passage, a second check valve is provided in the second oil passage, and an orifice plate is movably provided so as to face both the first oil passage and the second oil passage.

Abstract: A compression spring comprises a casing in which a piston is arranged for displacement, the piston being mounted on a piston rod. In the casing provision is made for two sectional casing chambers which are filled with pressure fluid, at least one of which being defined by the piston. A first operating valve, in an open position, connects the sectional casing chambers to each other and, in a shut-off position, blocks the compression spring. An additional throttle element ensures that an actuation and over-flow assembly between the sectional casing chambers is completely open only when the throttle element, with the valve pin tripped, is simultaneously moved by corresponding actuation into a position of release. Without any such actuation of the throttle element, there will be only throttled flow between the sectional casing chambers. Any inadvertent extension of the piston rod is thus precluded. This is an especially convenient and intuitive way of backrest adjustment in a seat.

Abstract: A suspension device includes a cap connected to a seal member on the inner tube of the front fork. A cable has one end fixed to a rod and the other end extends through the cap and is connected to a switching device on the handlebar. The rod has an end section which is connected to a frame and the frame is fixed to the suspension device. The rod is lifted by operating the switching device to pull the cable so as to set the suspension device at a locked status.

Abstract: A steering damper in a motorcycle includes a vane partitioning a chamber in a damper housing into two oil chambers, wherein hydraulic fluid flows between the two chambers to generate attenuating force. The steering damper also includes a damper shaft connected to the vane and supporting the vane for rocking motion with respect to the housing, and a hydraulic pressure control valve. The housing is attached to a head pipe, and the damper shaft is attached to a steering system. When the head pipe is to be attached to the housing, the housing is extended rearwardly behind a top bridge, and a linear solenoid for driving and controlling the hydraulic pressure control valve is attached to the housing and disposed below the extension thereof.

Abstract: A damping device utilizing a viscous fluid to stabilize rotational movement of a shaft. The damper includes a cylindrical body with multiple chambers containing a viscous fluid and a rotor with multiple vanes rotatably mounted within the body. The rotor has a hollow cylindrical center with passages that allow communication of fluid during rotational movement between the compressing and expanding chambers. A centrally located and axially adjustable valve acts to restrict the flow of fluid through the passages and thereby adjust the damping effect of the damper.

Abstract: A rotary damper for use in motor vehicle suspensions comprising a rotor disposed within damping fluid in a fluid chamber of a casing to form inner fluid volume and outer fluid volume, with first valve and second valve for controlling flow between the inner fluid volume and the outer fluid volume, and an accumulator using closed cell foam as a compressible material for fluid fill variation and thermal expansion. First valve controls flow from the outer fluid volume to the inner fluid volume for one direction of rotation of the rotor, while second valve controls flow from the inner fluid volume to the outer fluid volume for the opposite rotation of the rotor. Thus, the valves are configured to provide independent control of damping for each direction of rotation. A valve holder supporting the valves and providing flow passages is designed for powdered metallurgy fabrication.

Abstract: A fluidic dampening device having a housing containing a rotatably mounted wiper that sealingly moves past the side walls, bottom, and peripheral wall of the housing as well as a faceplate attached to the top of the housing. The housing contains a bypass channel that has a first port in the first side wall of the chamber and a second port in the second side wall of the chamber. In a first embodiment, a control shaft is rotatably mounted within the housing. The control shaft has indentations of varying sizes formed at distinct points around the shaft with areas having no indentation between each consecutive pair of indentations and is so located in the housing that either no indentation or only one indentation lies within the bypass channel at a given time. When no indentation has been rotated into the bypass channel, the control shaft completely blocks the bypass channel.

Abstract: A fluidic dampening device having a housing containing a rotatably mounted wiper that sealingly moves past the side walls, bottom, and peripheral wall of the housing as well as a faceplate attached to the top of the housing. The housing contains a bypass channel that has a first port in the first side wall of the chamber and a second port in the second side wall of the chamber. A control shaft is rotatably mounted within the housing. The control shaft has indentations of varying sizes formed at distinct points around the shaft with areas having no indentation between each consecutive pair of indentations and is so located in the housing that either no indentation or only one indentation lies within the bypass channel at a given time. When no indentation has been rotated into the bypass channel, the control shaft completely blocks the bypass channel. Optionally, channels exist in the bottom of the faceplate or in the portion of the housing which forms the bottom of the chamber.

Abstract: A rotary damper includes a housing and a vane. There is an indentation in the housing which permits fluid to flow readily from one side of the vane to the other during part of the rotary stroke. At the end of the rotary stroke, there is an alternative path for fluid to take from one side of the vane to the other, and this path preferably includes an adjustable aperture so the amount of damping at the end of the stroke can be adjusted.

Abstract: A rotary damper has a cylindrical casing having a chamber filled with a viscous fluid, a rotor rotatably mounted in the cylindrical casing, a movable valve mounted in the cylindrical casing for adjusting a flow of the viscous fluid in the chamber, a flange mounted in the casing and having a pair of through holes defined therein and communicating with the chamber, and a torque adjustment disk angularly movably mounted in the casing and having an orifice held in communication with the through holes. The orifice has a cross-sectional area varying progressively from an end thereof toward an opposite end thereof, wherein a torque applied by the rotor can be adjusted by angularly moving the torque adjustment disk.

Abstract: An articulation mechanism which can change a hinge angle freely, even if a considerable large load is attached to the tip end of a movable arm, and which can hold the hinge angle rigidly, when it is once stopped, is provided. The articulation mechanism (1) has a fluid hermetically sealing space (25) in which a non-compressive fluid or a compressive fluid compressed to a predetermined pressure is hermetically sealed, so that even if there may be energizing force, relative rotation between rotary members is prevented by a predetermined force. When the fluid hermetically sealing space is released by opening and closing valve (21), as a result of the energizing force such as may be generated, for example from load or spring, the fluid can transfer, resulting in relative rotations of the rotary members.

Abstract: A steering stabilizer for bicycles utilizing a hydraulic fluid. A stabilizer body is secured to the frame of the bicycle. The stabilizer body has a hydraulic reservoir which is in the shape of an arc. A vane is supported by the stem of the bicycle which turns with the handlebars and the arcuate shaped opening is filled with a hydraulic fluid. As the handlebars are turned, the stem turns the stem vane and produces a resistance to turning. Preferably this resistance is variable by the placement of a valve between the two volumes on each side of the stem vane.

Abstract: A liquid dashpot has a casing comprising a main body and bottom cover. The main body contains a liquid chamber which is divided into two discrete spaces by a vane member. One end wall of the chamber has porting passage means formed between the outer face of said wall and the bottom cover to provide restricted communication between the chamber spaces. A flexible diaphragm forms a compensation chamber on the bottom cover subject to atmospheric pressure. The chamber can communicate with the spaces within the liquid chamber through non-return means that block super-atmospheric flow to the compensating chamber. The porting and the communicating passage means between the spaces and the compensating chamber are formed integrally in the die-cast main body and/or the bottom cover, requiring no machining. Assembly is facilitated by bringing together the bottom cover, flexible diaphragm and non-return means as a sub-assembly.

Abstract: One preferred embodiment of a rotary viscous damper that provides damping force constancy over the operating temperature range of a viscous working fluid includes a damper housing defining a stationary conical damping surface, a shaft member rotatably mounted in the damper housing, a rotor member having a rotating conical damping surface, a temperature compensation mechanism, and a bias spring. The stationary and rotating conical damping surfaces in opposed combination define the shear gap of the damper. The rotor member is mounted in combination with the shaft member, and is axially displaceable with respect thereto. The bias spring provides a constant spring force acting on the rotor member to axially position the rotor member to establish the baseline shear gap of the damper. The temperature compensation mechanism is mounted in compressive engagement with the rotor member and exerts a temperature-dependent biasing force thereagainst in opposition to the constant spring force.

Abstract: A damper mechanism which includes a cylinder with a movable shaft therein with the shaft having a swingable valve on the outer surface. The end of the swingable valve will contact the cylinder when the shaft is rotated in one direction to form a nonreturn valve due to its association with a partitioning member having an oil passage to communicate chambers formed on opposite sides of the partitioning member. When the shaft is rotated in one direction with the valve moving toward the partitioning member, rotational movement of the shaft in that direction will be dampened by restricted movement of oil from one chamber to the other. When the shaft is rotated in the opposite direction, the valve moves away from the cylindrical surface thus enabling unrestricted rotational movement of the shaft in the opposite direction.

Abstract: A toilet seat lowering apparatus includes a housing defining an internal cavity for receiving water from the water supply line to the toilet holding tank. A descent delay assembly of the apparatus can include a stationary dam member and a rotating dam member for dividing the internal cavity into an inlet chamber and an outlet chamber and controlling the intake and evacuation of water in a delayed fashion. A descent initiator is activated when the internal cavity is filled with pressurized water and automatically begins the lowering of the toilet seat from its upright position, which lowering is also controlled by the descent delay assembly.

Abstract: There is disclosed a hydraulic fluid regulator for automatically supplying hydraulic fluid to the pressure chamber of a rotary torque resistance actuator to replace fluid which may move out of the pressure chamber of the actuator when the fluid is heated and expands. The regulator includes a pneumatically pressurized fluid supply reservoir connected to the pressure chamber in the actuator by two parallel conduits respectively having spring loaded check valves therein connected in opposite directions to supply fluid to the chamber when the pressure in the chamber falls below a preset value and to transmit fluid from the chamber to the reservoir when the pressure in the pressure chamber exceeds a different preset value. The reservoir also includes a third bypass conduit connected in parallel with the first two conduits for metering fluid from the actuator chamber when the fluid expands, and a filter is connected in line with the three conduits.

Abstract: A torque resistance device includes a rotor, a vane, and a valve device for regulating the resistance at which the rotor operates. The valve device is mounted to the housing for the rotor and vane assembly. The valve device includes a valve member which is adjustable via a threaded shaft.

Abstract: A novel hydraulic, fluid-filled shock absorber including a shock absorber chamber bounded by cylindrical walls and opposed, spaced-apart first and second end plates including first means for anchoring the chamber to a frame, a shock absorber shaft passing axially through the chamber and end plates including second means for connection to a separate oscillatory member, a work disc pivotally mounted transverse to the shaft inside the chamber intermediate the first and second end plates, a baffle fixedly mounted inside the chamber in fluid-sealing relationship therein having at least one aperture formed therethrough, a wiper baffle axially mounted to the shaft intermediate the disc and the first end plate extending outward into fluid-sealing relationship against the chamber walls to effectively divide the chamber into first and second subchambers so that rotation of the shaft forces fluid from one subchamber through the aperture into the other subchamber, a first pivot pin extending inward from the second end pl

Abstract: A retrofit accessory to be installed by the layman to a domestic toilet, which locks the lid, or lid and seat, in the upright position while in use, and automatically lowers them gently when flushed. Additionally, the accessory to automatically dispense toilet bowl cleaner and/or deodorant spray and to lock the lid in the closed position when desired.

Abstract: An improved door closer which prevents overly rapid closing due to an external force, such as wind pressure, being exerted on the door. A pair of oil holes are formed communicating with a first pressure chamber and a non-pressure chamber formed in the main cylinder of the closer. A slide valve is disposed in a communicating hole communicating with the oil holes and extending generally perpendicular to the cylinder. A head portion and a braking valve portion are formed on the valve rod of the slide valve at positions corresponding to the oil holes. An elastic member urges the slide valve in the direction opposite to the normal flow direction of the operating oil when the door is closing. An adjusting screw controls the position of the slide valve.

Abstract: A hydraulic device for damping a relative pivotal movement of a motor cycle wheel, which is rotatably journalled at the free end portion of a fork, said fork being pivotably mounted at the frame of the motor cycle. The damping device is of the kind comprising a casing (6) having a sector-shaped hydraulic chamber (11), in which a piston wing (23) is pivotable while being damped by hydraulic fluid. The device is adapted to be mounted adjacent to the fork mounting of the frame of the motor cycle with the casing (6) secured to the fork or to the frame and with a shaft (8), which is connected to the piston wing (23), secured to the frame or the fork, respectively, in coaxial alignment with the pivot axis of the fork.

Abstract: Relative motion between movable parts is damped by way of a hydraulic damper having radial vanes in a hydraulic damping fluid filled working chamber and dividing the chamber into subchambers which respectively increase and decrease in volume in response to torsional movements of the vanes in the working chamber during relative rotation of subassemblies of the damper. Damping is effected by controlled displacement of the hydraulic damping fluid between the subchambers through restricted orifices across an edge of the vanes during torsional movements of the vanes responsive to relative motion of the parts to be damped. Damping may be provided in either direction of rotation. Another level or no damping may be provided in the opposite direction of rotation. Substantially equal damping may be effected in both directions of rotation. A range of adjustments of the restricted orifices is provided for. The damper may be equipped with an overload pressure relief device.

Abstract: A dampener for a clapper valve wherein a rotor member having radially outwardly extending vanes which subdivide each of two fluid cavities defined in a housing into first and second fluid volumes is characterized by radially extending, first and second passages axially spaced within the rotor which respectively communicate each of the first volumes and the corresponding second volume. The increase in pressure within either of the volumes generated by the motion of the vanes (which move with the clapper) is accommodated by the fluid in one passage venting to the other passage through an axially movable valve. The valve piston presents equal surface areas to each passage, to thereby fluid balance the damper in both the opening and closing directions of the clapper. A bypass channel is provided through which one of the fluid volumes in the first cavity with one of the volumes in the second cavity.

Abstract: A brake of this type has a brake shaft and a brake wing secured to the shaft so that the wing is rotatable with the shaft in a brake housing filled with a brake medium. A cam ring located in the brake housing has a control curve or surface which cooperates with a cut-out in the brake wing so that the size of a gap formed between the cam ring surface and the brake wing depends on the angular position of the wing relative to the cam ring whereby the dampening action of the brake medium on the movement of the brake wing varies with said angular position of the brake wing relative to the normally stationary cam ring.

Abstract: A rotary vibration damper comprises one or more vanes secured to a rotor within a housing filled with damper fluid, the vane or vanes cooperating with one or more fixed walls to define complementary fluid-filled chambers within the housing between which fluid will flow as relative vibratory movement occurs between the housing and the vane or vanes. A partition wall movable axially within the housing like a piston is spaced from one end of the vane or vanes to define a restricted path for the flow of damper fluid between complementary chambers. The restriction of the flow path, and hence the vibration damping effect, can be increased or decreased by axial movement of the partition wall.