Abstract: Provided is a rotary damper having a first valve provided in a first oil passage, the rotary damper including an oil chamber filled with oil; a vane located in the oil chamber; a groove which is formed in the vane and functions as a valve box of the first valve; a valve body of the first valve which moves while being in contact with a bottom surface of the groove; and an elastic body which applies elasticity to the valve body, and causes the valve body to come into contact with a wall surface of the oil chamber when the oil does not flow, in which the bottom surface of the groove is a slope, and thereby the valve body which is in contact with the wall surface when receiving oil pressure from one direction moves away from the wall surface when receiving the oil pressure from an opposite direction.

Abstract: Provided is a damper capable of damping a moving member which reciprocates along an axis, using a damping force having a hysteresis property. A damper includes a cylindrical housing into which a push rod is to be inserted in the direction of an axis thereof, and a damping mechanism placed in the housing and capable of damping the push rod by a damping force having a hysteresis property, wherein the damper is to be attached using a master cylinder mount space of a clutch pedal unit.

Abstract: A controllable hydrodynamic retarder system for a transmission including an electronic controller unit (ECU) for selecting and controlling brake torque by adjusting a retarder outlet pressure is described. The system can include an algorithm to calculate a retarder outlet pressure set point or tables or brake torque curves or profiles to allow the ECU to calculate or look up the functional relationships between the retarder RT outlet pressure, a vehicle or rotor speed, and a brake torque curve selected by the operator to provide the selected RT outlet pressure. The systems disclosed can also include a cooling system or utilize a vehicles engine cooling system. In one embodiment, the cooler can be shared between a transmission and the controllable retarder and can be adjusted to accommodate cooling requirements. The ECU can also make adjustments to the RT outlet pressure to address short term and long term RT overheating protection independent of the cooling system.

Abstract: An apparatus for regulating the coolant flow for internal combustion engines in motor vehicles has a valve body which can be moved in a valve apparatus (8) for opening or closing or partially opening. The valve body can be arranged in a throughflow opening to be connected to a brake system (1, 2, 3, 4; 11, 12, 13, 14; 21, 22, 23, 24, 25) to regulate the volume of the coolant flow.

Abstract: A liquid damper system for restraining vibrations generated in a rotating body includes: a liquid damper which is coaxially rotatable with the rotating body and includes a collision member, the collision member being provided in a casing in which liquid is enclosed and the liquid colliding with the collision member when moving in the circumferential direction; and a relative rotation unit configured to cause the liquid damper to rotate relative to the rotating body. Vibrations of a rotating body are effectively suppressed when a rotating body steadily rotates at a main resonance frequency, in the liquid damper system.

Abstract: A locking device for an adjustable steering column for a motor vehicle may include an actuating shaft that is mounted such that it can be rotated about a rotational axis, that is connected to an operative element of a clamping device, and that is coupled to a rotor of a rotational damper. The rotor may be mounted rotatably in a housing and may be capable of being driven rotationally about a rotor axis by the actuating shaft. A rotational movement of the rotor may be damped in at least one rotational direction. The rotor may have at least one blade that projects radially with regard to the rotor axis and that has a contact face that makes frictional contact with a contact track on an inner face of the housing. Such a locking device has an improved rotational damper, is less complicated to manufacture, and has high acceptance in automotive engineering.

Abstract: A rotary damper device with a one-way clutch includes a rotary damper having a damper housing having a viscous fluid sealed inside, and a rotor having a rotor blade received rotatably inside the damper housing and a rotor shaft; and the one-way clutch including an inner member having a recessed portion on an outer perimeter portion and coaxially joined to the rotor shaft, an outer member having an inner gear, and a gear housed in the recessed portion to engage with the inner gear. When the outer member rotates in a positive direction, the outer member rotates independently from the inner member. When the outer member rotates in a negative direction, the gear couples and the outer member and the inner member rotate together. The inner member has a portion larger than the rotor shaft. The outer member has a locking portion to be locked on the inner member.

Abstract: A rotary damper device includes a damper housing enclosing a viscous fluid; a rotor having a rotor vane rotatably received inside the damper housing, and a rotor axis protruding to an outside of the damper housing; and a rotary member combined with a protruding end of the rotor axis. The rotary member includes an insertion hole through which the protruding end of the rotor axis passes, and a pair of control walls at a hole edge with the insertion hole interposed therebetween. A protruding end of the rotor axis protrudes in a radial direction of the rotor axis along a gap between the pair of control walls so as to be engaged with the hole edge of the insertion hole by being heated and deformed in a state wherein the protruding end of the rotor axis has passed through the insertion hole.

Abstract: An embodiment provides a damper a damper including: a housing; a rotor; and a sealing member. The housing includes outer and inner cylinder portions to define a filling space portion therebetween for filling with a viscose fluid. The rotor includes a head portion and a cylinder portion extended downwardly therefrom so as to be inserted into the filling space portion. The sealing member seals the filling space portion. The rotor further includes axially-extending first and second groove portions provided on outer and inner peripheral surfaces of the cylinder portion near the bottom portion thereof. At least one of the first groove portions includes a communicating portion which communicates the inside and the outside of the rotor, and the second groove portion is apart from the communicating portion in a circumferential direction.

Abstract: A damper includes a cavity and a rotation shaft. The rotation shaft is inserted into the cavity of the body in sealing way. An oil cavity is disposed between the cavity and the rotation shaft. The external wall of the rotation shaft is disposed with a pair of protruding ribs axially. Each protruding rib is a groove. One side of the groove is a first retaining wall and the other side is a second retaining wall. A transitional arc is disposed between the side wall of the groove and the top surface of the first retaining wall. A first shape is formed between the other side wall of the groove and the top surface of the second retaining wall. A blade is disposed between the groove of one protruding rib and an internal wall of the cavity, and the blade is movable between the two retaining walls of the groove.

Abstract: A device for damping the movement of a movably mounted component includes a first, mechanically acting braking device with at least one friction pair, wherein, in order to generate a braking force, a driven friction surface can be rotated about an axis of the first braking device relative to a secured friction surface resting thereon, and a second braking device which is coupled to the first braking device, wherein the friction surfaces of the friction pair, or of at least one of the friction pairs, are pressed against each other in response to a braking force exerted by the second braking device.

Abstract: A device for use in the control of mechanical forces is provided. The device includes first and second terminals for connection to components in a system for controlling mechanical forces and independently moveable. The device further comprises a hydraulic device connected between the terminals and containing a liquid. The hydraulic device is configured to produce upon relative movement of the terminals, a liquid flow to generate an inertial force due to the mass of the liquid to control the mechanical forces at the terminals such that they are substantially proportional to the relative acceleration between the terminals.

Abstract: A damper 1 includes a vessel 4 for accommodating a viscous fluid 3 in its interior 2; hampering walls 5 and 6 for hampering the flow of the viscous fluid 3; a partitioning member 11 which partitions each of interior portions 7 and 8 into two chambers 9 and 10 and is provided rotatably; a communicating hole 13 formed in the partitioning member 11 so as to allow the two chambers 9 and 10 to communicate with each other via a variable passage 12 whose passage cross-sectional area changes; a flow limiting means 14 for limiting the flow of the viscous fluid 3 in the chamber 9 into the chamber 10 through the communicating hole 13, when the internal pressure of the viscous fluid 3 accommodated in the chamber 9 has exceeded a fixed value on the basis of the rotation of the partitioning member 11; and a resilient means 15 for resiliently urging the partitioning member 11 in an R2 direction with respect to the vessel 4.

Abstract: A vehicle cooling circuit, especially an engine cooling circuit, including a cooling medium pump and a vehicle drive engine and/or other heat-generating assembly cooled by means of the cooling medium. The circuit includes a hydrodynamic retarder with the working medium of the hydrodynamic retarder simultaneously also being the cooling medium of the cooling circuit, and the hydrodynamic retarder operating as the cooling medium pump. The secondary blade wheel is associated with a brake or a drive running counter to the drive of the primary blade wheel in such a way that it can optionally be fixed in a first operating state (braking operation) or be driven counter to the rotational direction of the primary blade wheel and, in a second operating state (pumping operation), can partially or completely be released such that it circulates at the speed of the primary blade wheel or at a specified speed difference slower than the primary blade wheel.

Abstract: The present invention provides a rotary damper in which both yields and braking characteristics can be enhanced. The rotary damper of the invention includes a valve mechanism which comprises an operating chamber 7 through which fluid can pass, a valve body 8 which forwardly moves from a natural state position when the valve body 8 receives fluid pressure and which can forwardly moves in the operating chamber 7, and a first spring 9 capable of giving a resistance to the forward movement of the valve body 8. The valve mechanism can reduce a flow rate of fluid which passes through the operating chamber 7 by a flow path 14 formed between the valve body 8 and a peripheral wall 7a of the operating chamber 7. A reducing amount of fluid can be increased as a moving distance of the valve body 8 which forwardly moves in the operating chamber 7 is increased.

Abstract: A hinge device prevents breakage of a structuring part from an increase in an internal pressure during overload. In the hinge device, first and second members are rotatable relative to each other. A case is fixed to either the first or second member, and a shaft body capable of rotating relative to the case is fixed to the other. A first chamber and a second chamber formed between the case and the shaft body are filled with viscous fluid. An orifice between the first and second chambers narrows a flow path for the viscous fluid moving from the first to second chamber, resisting rotation of the shaft body. A space region is provided in the shaft body, with a valve body movably placed therein. When pressure of the first chamber reaches a predetermined level, the valve body moves in the space region to increase the volume of the first chamber.

Abstract: A braking arrangement for drive heads or pump heads, to be preferably used in a progressing cavity pump (PCP) system in oilfields, consisting of at least one disk moving inside a viscous fluid and facing a static disk, in which mechanical energy is transformed into heat. The viscous brake is a device acting as a function of the rotation speed, in which a higher speed generates a higher braking power caused by the increase of friction among the disks and the fluid. The arrangement may comprise more than one mobile and static disk assemblies, as well as a hollow axis instead of a solid one, to allow housing the pumping rod inside the axis, and may also comprise an anti-reverse bearing.

Abstract: The present invention provides a rotary damper in which both yields and braking characteristics can be enhanced. The rotary damper of the invention includes a valve mechanism which comprises an operating chamber 7 through which fluid can pass, a valve body 8 which forwardly moves from a natural state position when the valve body 8 receives fluid pressure and which can forwardly moves in the operating chamber 7, and a first spring 9 capable of giving a resistance to the forward movement of the valve body 8. The valve mechanism can reduce a flow rate of fluid which passes through the operating chamber 7 by a flow path 14 formed between the valve body 8 and a peripheral wall 7a of the operating chamber 7. A reducing amount of fluid can be increased as a moving distance of the valve body 8 which forwardly moves in the operating chamber 7 is increased.

Abstract: The rotary damper for controlling helicopter motions includes an outer canister with an inner paddle wheel receiving cavity which receives an inner paddle wheel with upper and lower elastomeric tubular intermediate members between the inner paddle wheel and the outer canister. The canister and inner paddle wheel form neighboring variable volume chambers in liquid communication through liquid damping conduits. A clockwise rotation of the inner paddle wheel about the center of rotation axis relative to the outer canister pumps damper liquid from a second variable volume chamber through a first liquid conduit towards a first variable volume chamber, and a counterclockwise rotation of the paddle wheel relative to the outer canister pumps the damper liquid from the first variable volume chamber through the first liquid conduit towards the second variable volume chamber with the elastomeric tubular intermediate members providing for the relative rotation and containing the damper liquid in the damper.

Abstract: In one aspect, the present invention is directed to a vehicular brake (10) comprising: a closed-circuit tunnel (14, 62) containing hydraulic liquid (72); a mechanism (22) for moving the hydraulic liquid (72) within the closed-circuit tunnel (14, 62) together with the wheel (30) of the vehicle; and at least one faucet (24) within the closed-circuit tunnel (14, 62), for reducing the cross-section area (from A1 to A2) of the closed-circuit tunnel (14, 62) at least at one location, upon braking activity, thereby braking the vehicle wheel (30) without friction wear.

Abstract: The present invention provides a rotary damper in which both yields and braking characteristics can be enhanced. The rotary damper of the invention includes a valve mechanism which comprises an operating chamber 7 through which fluid can pass, a valve body 8 which forwardly moves from a natural state position when the valve body 8 receives fluid pressure and which can forwardly moves in the operating chamber 7, and a first spring 9 capable of giving a resistance to the forward movement of the valve body 8. The valve mechanism can reduce a flow rate of fluid which passes through the operating chamber 7 by a flow path 14 formed between the valve body 8 and a peripheral wall 7a of the operating chamber 7. A reducing amount of fluid can be increased as a moving distance of the valve body 8 which forwardly moves in the operating chamber 7 is increased.

Abstract: A method for estimating a brake pressure, a longitudinal tire force and a tire-road ? during periods of antilock control that measures deceleration of a wheel during a period of constant brake pressure, reduces a brake pressure to cause slip on the wheel to begin reducing, measures reacceleration of the wheel after a point in time in which the change in brake pressure is completed, calculates a change in acceleration based on the measured reacceleration and the measured deceleration, estimates a change in brake pressure from a proportional relationship between the change in acceleration and a brake pressure value, estimates a brake pressure from the relationship between a time for valve activation during a change in acceleration and the change in brake pressure. The method also estimates a longitudinal tire force from a mathematical relationship between the change in acceleration, a tire radius, and the estimated brake pressure.

Abstract: In a rotary damper capable of being easily assembled by reducing the remaining air inside an accommodation portion and reducing the non-uniformity of damping torque, a center shaft 73 is provided in the center of a fixing and supporting member 71, an inner cylinder wall 63 into which the center shaft 73 is inserted rotatably is provided in a driven rotation member 61, an O ring 81 which prevents the leakage of viscous fluid 101 from between the driven rotation member 61 and the fixing and supporting member 71 is provided, a first path 70 which enables the accommodation portion 91 to communicate with its outside is provided between the center shaft 73 and an inner circumference face of the inner cylinder wall 63, and a hole 63c which allows the bottom side of the O ring 81 inside the accommodation portion 91 to communicate with the first path 70 is provided in the driven rotation member 61.

Abstract: In the breakdown preventive mechanism of a rotary damper, when the upper rotor is rotated in one direction, a communication path is formed between the valve body and the lower rotor, and the pressure in the pressure chamber is formed between the lower rotor and the lower housing is lowered, and rotation is easily performed. When the upper rotor is rotated in another direction, the viscous fluid does not flow between the valve body and the lower rotor, and the pressure in the pressure chamber formed between the lower rotor and the lower housing is raised. As a result, the viscous fluid pushes down the relief valve and a cage type relief valve by resisting the elastic element, and thereby prevents breakdown of the rotary damper.

Abstract: A rotary damper comprises a casing fixable to a structure and which comprises a wall which surrounds a chamber filled with a viscous fluid and has an inner surface facing the chamber. A cover is mounted and welded on a shoulder surface of the wall of the casing in such a way as to close the chamber in a sealed manner. A rotor which is mounted rotatably on the casing and comprises a disc portion, adapted to rotate within the chamber, and has a shaft portion extending axially from the disc portion and emerging through the cover so as to be operationally associable with a movable member. The cover has peripherally a collar-like protuberance, extending along the entire perimeter of the cover and coupled to the inner surface of the wall of the casing in such a way as to oppose the infiltration of the viscous fluid between the collar-like protuberance and the inner surface of the wall.

Abstract: A system for stabilizing a water brake including at least two rotor disks, a chamber of the water brake for containing water positioned between the at least two rotor disks, a pressure measuring device for measuring a partial pressure in the chamber, and an air injection device for injecting air into the chamber to increase the partial pressure in the chamber.

Abstract: A damping device using viscous shear to moderate substantially linear movement. The device has a housing with one or more reservoirs containing a viscous fluid, such as silicone, and one or more retractable struts that can extend from the housing. The strut has a portion formed as a toothed rack, and an associated axle has a pinion gear on a portion associated with the toothed rack of the strut. The teeth of the rack mate with teeth of the pinion gear. A disk, or preferably series of spaced disks, can be mounted on the axle inside the reservoir to dampen linear movement of the strut, from shear with a static plate adjacent to the disk on the axle. The relatively fixed, spaced disks or plates are adjacent to or interdigitated with the disks on the gear axles to dampen linear movement of a strut.

Abstract: A speed restrictor for a gravity driven vehicle is provided. The speed restrictor is configured to limit the speed of the gravity driven vehicle by restricting rotation of a wheel axle while the gravity driven vehicle descends down a mountain track.

Abstract: A damper device used in a range of electronic apparatuses. The damper device allows a diverse opening and closing operations by means of a simple structure. A stationary plate and a movable plate resiliently contact, due to the action of a spring, over different contact areas as a movable shaft rotates. This enables a change in a damping force in accordance with opening and closing angles. Accordingly the damper device which allows diverse opening and closing operations, such as to open at a constant speed from immediately after starting to open, is achievable by means of a simple structure.

Abstract: A hydrodynamic brake which comprises a stator and a rotor, arranged to form a toroidal space, and blades on the rotor and the stator extend into the space. A medium which is intended to be supplied to the toroidal space to effect a braking action. A first pipe circuit for transferring the medium from an outlet from the toroidal space to an inlet to the toroidal space. A second pipe circuit for transferring the medium from a storage space to the toroidal space. The second pipe circuit transfers the medium to the toroidal space via a second inlet which is arranged separately relative to a corresponding first inlet to the first pipe circuit.

Abstract: A decelerating device includes a casing defining internally a chamber filled with a viscous fluid, e.g. silicone oil; and a movable member fitted in fluidtight manner to the casing, so as to be housed at least partly inside the chamber and immersed in the viscous fluid. The movable member has a partition for dividing the chamber substantially in fluidtight manner into at least two adjacent portions varying in volume as a function of the position of the movable member with respect to the casing; and a calibrated constriction for maintaining permanent hydraulic connection of the at least two adjacent portions of the chamber, so that the viscous fluid flows between the chamber portions as a consequence of relative motion between the movable member and the casing.

Abstract: A damper that is mounted to a printed circuit board of an automobile's climate control system includes a tactile feel and torque control mechanism for the user as the user controls the temperature and climate within the interior of an automobile. The damper incorporates a plurality of detents that engage with a plurality of ribs or similar protrusions for providing the desired tactile feel and torque control in the control knob of the climate control system. The printed circuit board used with the automobile's climate control system has an integrated polymer thick film (PTF) circuit that replaces the traditional circuit board technology, thereby eliminating the need for separately mounted potentiometers and resistors as those items can be printed onto the polymer circuit. The printed circuit board is less expensive to manufacture over existing circuit board technology, is easier to assemble, results in fewer parts, and is environmentally friendly as no soldering of components is required.

Abstract: Within the framework of the method for increasing brake efficiency of a vehicle with a hydrodynamic retarder, the rotational speed of the motor is increased by command for downshifting, in such a manner, that the increased cooling fluid circulation flow, due to the higher rotational speed of the motor speed, the necessary retarder braking power is made available, whereby a downshift command is issued, if this is necessary due to the actual retarder braking power.

Abstract: A rotary damper device includes a case in which a viscous fluid is filled and sealed, a rotation shaft relatively rotatably supported by the case, a rotation vane formed protruded from the rotation shaft, and a check valve mounted on a tip part of the rotation vane. A passage where the viscous fluid passes through is formed in the rotation vane. The check valve is provided with an opposing face part facing the passage and a frame body interposing the rotation vane. An elastic member for energizing the opposing face part of the check valve for closing the passage of the rotation vane is formed in either the rotation vane or the opposite side of the frame body of the opposing face part.

Abstract: A clutch device for use with a vehicle suspension system to vary the stiffness of a stabilizer bar. A plurality of dampers connected to the clutch body alternate with a plurality of dampers connected to the stabilizer bar. The dampers are coated with a friction material and surrounded by a fluid. When a load is applied on the walls of clutch body, the friction material comes into contact, dampening the rotation action of the stabilizer bar. A sensor senses the parameters of the ride and generates a signal based on these parameters. The signal activates a power source controller which applies the load to the walls.

Abstract: Sealing arrangement for an oscillating motor, comprising a housing, in which a motor shaft is supported with freedom to rotate, where the housing and the motor shaft form at least one working chamber filled with a pressure medium, the chamber being sealed off with respect to the motor shaft by the seal, which is located in a sealing groove, The seal has a one-piece sealing body, one side of which rests against the base of a groove in the housing, whereas the other side rests against the motor shaft, where the one-piece sealing body has an anti-rotation device which prevents it from turning with respect to the housing.

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: The provision of a rotational speed controller which is capable of increasing braking torque without a corresponding increase in size, and easily outputting braking torque assumed in the design, and minimizing variations in the braking torque. A casing 6 incorporates a shaft 7 inserted therein, a first rotor 8 rotated together with the shaft 7 in one piece, and a second rotor 10 rotated through the medium of the first rotor 8 and a planet gear 9. A first rotation mechanism for rotating the first rotor 8 is the shaft 7. A second rotation mechanism for rotating the second rotor 10 is a planetary gear mechanism operated in association with the rotation of the first rotor 8.

Abstract: A damper is provided having an assist grip into which the damper is built. The damper includes a housing having an inner cylinder and an outer cylinder which disposed concentrically with each other and an annular space formed between the inner cylinder and the outer cylinder containing a viscous fluid; a cylindrical rotor accommodated in the housing and which receives a damping action from the viscous fluid; a ring-shaped sealing member for preventing viscous fluid leakage; and an annular cap provided independently of the rotor and mounted to the housing, and which retains the rotor and the sealing member in the housing. Another damper is provided that includes a housing which has an annular space containing a viscous fluid, the cylindrical rotor the annular cap, a ring-shaped first sealing member disposed between the rotor and the cap, and another ring-shaped second sealing member disposed between the rotor and the housing.

Abstract: The present invention relates to a hydrodynamic brake, which comprises a stator (1) and a rotor (2). The stator (1) and the rotor (2) are provided coaxially in relation to each other such the annular recesses (5, 10) of the stator (1) and the rotor (2) form a toroid-shaped space. A first medium is arranged to be supplied to said toroid-shaped space for providing a brake action during rotation of the rotor (2). The hydrodynamic brake comprises, with advantage, at least one injection member (16, 17), which is arranged to supply a second medium to the toroid-shaped space for reducing the circulation of air in the toroid-shaped space during time periods, when no brake action is desired. The second medium is supplied, at least one location, to the toroid-shaped space with a pressure and in a direction, which at least partly is directed towards the principal flow direction (a) of the circulating air.

Abstract: A rotary damper includes a pair of rotary members which pivot via rotating support shafts includes an outer tube, an inner tube having a smaller diameter than that of the outer tube, an outer wall of the inner tube being fitted into a tubular space of the outer tube and the inner wall of the outer tube being fitted into the tubular space of the inner tube, a first O-ring installed in an end portion on the open side of a gap between the outer wall of the outer tube and the outer wall of the inner tube, a second O-ring installed in an end portion on the open side of the gap between the inner wall of the outer tube and the inner wall of the inner tube, a viscous substance with which the gaps between the inner tube and the outer tube sealed by the first and second O-rings are filled, a central hole of the inner tube serving as a through-hole for receiving the rotating support shafts, and a mating member, mating with the respective rotating members, being provided on the inner tube and the outer tube.

Abstract: There is provided a damping device for making large a damping force per unit length in an axial direction thereof. The damping device 20 is provided with a motion conversion section 21 for converting a relative linear motion between the two object portions to a rotational motion of a rotation member 30 and a damping section 22 operatively connected to the motion conversion section and adapted to resist the rotational motion of the rotation member. The damping section 22 is formed with the rotation member 30, an inner peripheral side sealing layer 34 disposed on an inner peripheral side of the rotation member 30 and an outer peripheral side sealing layer 33 disposed on an outer peripheral side of the rotation member. The inner and outer peripheral side sealing structure are sealed with viscous medium.

Abstract: A rotatable hydraulic damper includes a tubular fixed member and a shaft has a section rotatably received in the fixed member. A sleeve is rotatably engaged with the inner periphery of the fixed member and mounted to the section of the shaft. A passage is defined longitudinally through the shaft and a cap is mounted to the section of the shaft and seals the open end of the fixed member. Two chambers are respectively defined in the fixed member and separated by the sleeve. A plurality of longitudinal grooves are defined in an inside of the sleeve and an end of the sleeve is sealed by a bead urged by a spring. The hydraulic oil in the two chambers flows through the sleeve at different speeds so that the pivotable object closes slower than it is opened.

Abstract: A hydraulic rotary roll damper for a motor vehicle is mounted concentrically about an anti-roll bar 4 and coupled to the ends of the anti-roll bar 4 by tubing 7, 8. The damper includes a stack of stator plates 18 mounted on a stator housing member 10 and rotor plates 19 mounted on a rotor housing member 11. The rotor plates 19 are each located within a recess of one of the stator plates 18, and side plates 18a between the stator plates 18 cooperate with the stator plates 18 so as to form a series of cavities 50 each divided into working chambers 52, 54 by one of the rotor plates 19. A varying width passage 25 or a valve 62 and piping 60 are provided to decrease the damping with increasing axle articulation.

Abstract: To provide a rotary damper in which a viscous fluid does not leak from between an inner end face of a land and an outer circumferential surface of a rotatable member, and a decrease in torque caused by an eccentric rotation of the rotating member is prevented. The rotary damper has a rotatable member being relatively rotatable with respect to a casing, the proximal portion of the rotatable member being accommodated in a chamber of the case; a ridge member extending axially along and projecting radially outwardly from an outer circumferential surface of the proximal portion of the rotatable member, the ridge member having a radially outer end face disposed for sliding contact with an inner circumferential surface of the chamber; and the land extending axially along and projecting inwardly from the inner circumferential surface of the chamber, the land having a face transverse with respect to the rotational direction of the rotatable member.

Abstract: Rotary damper, in particular for an actuating member in motor vehicles, comprising a housing having a cylindrical damper chamber, a liquid viscous medium within the chamber, a rotatably supported shaft within the chamber having at least one substantially radially extending vane such that upon rotation of the shaft, displaced medium flows between a narrow passage between the cylindrical wall of the chamber and the free end of the vane, at least a radially outer portion of the vane being inclined with respect to a diameter extending through the base of the vane and in the circumferential direction and being bendable such that upon a rotation of the shaft in the inclination direction the vane is bent towards the cylindrical wall and upon an opposite rotation the vane is bent towards the shaft, wherein at least one locking cam is provided at the cylindrical wall of the chamber which extends radially inwards and is adapted to be engaged by the free end of the vane if it is bent towards the cylindrical wall a prede

Abstract: A rotary damper has an inner member located within an outer member and an annular seal between the members enclosing a fluid-filled space bounded in part by mutually adjacent faces of the members. A viscous damping force is thereby generated by relative rotation of the members. The seal has a radially inner rim in sliding engagement with the inner member. A resilient flexible retainer held by the outer member bears on the seal inner rim, flexure of the retainer providing a predetermined axial sealing pressure on the rim. The seal includes a diaphragm portion exposed to atmospheric pressure and deformable to accommodate thermal expansion of the fluid in the sealed space.

Abstract: The disclosure relates to a viscous damper of the labyrinth ring type for incorporation in a mounting for a TV or video camera for damping pan or tilt movement of the camera. The damper has a stator (10) having a multiplicity of upstanding concentric annular fins (12) and a rotor (17) having a corresponding multiplicity of concentric annular fins (32) projecting downwardly which interleaf with clearance with the upstanding flanges of the stator, the space between the fins being filled with a viscous fluid to provide a resistance to relative movement between the rotor and stator. The rotor is adjusted with respect to the stator by a motor driven lead screw. A speed sensor measures speed of the rotor with respect to the stator and torque applied to the camera by the hand control to pan or tilt the camera is measured by a strain gauge associated with the hand control. A control system is provided for the motor embodying a microprocessor preprogrammed with one or more algorithms coordinating torque and speed.

Abstract: A rotation damper for toggle joints prosthesis (1) that is arranged for swing phase control of the prosthesis, and incorporates a housing having at least one clamber (13) with a damping medium disposed therein is disclosed. The chamber is arranged so that the damping medium is displaced through a restriction (14a) with a swing motion of at least one pivot axle (6) in the prosthesis. The damping medium is a visco-elastic compound, having an ability to exert a bigger resistance at rapid motion processes as compared to slower processes.

Abstract: An apparatus provides variable resistance to rotation and includes a housing having a shaft having a first portion that is rotatable in the housing and a second portion passing outwardly thereof adapted to receive the tire of a bicycle for stationary bicycle exercise. A first body in the housing is mechanically linked to the first portion of the shaft so as to be rotatable within the housing. A second body in the housing is slidably connected to the first portion of the shaft and has flat face opposed to the flat face of the first body. The second body is movable with respect to the first body to result in a variably-sized gap between the opposed faces. A spring located between the housing and the second body biases the second body toward the first body.