Abstract: A lift apparatus has a frame with open sides and a web assembly slidably retained along the sides which extends from one end of the frame to the other. While the web assembly is retracted, the frame moves to pass around a mobility-impaired individual and rest against the surface supporting the individual. The web assembly is then extended to move underneath or behind the individual, providing lifting support. The frame is configurable for orientations ranging continuously between horizontal and upright sitting. The web assembly has an upper web contacting the individual, a lower web contacting the support surface, a strength layer carrying the individual's weight, and a roller nose bar assembly which is pulled to extend the web assembly. A hand-held power tool can drive the web assembly, adjustment of inclinations of the back and leg sections of the frame, and vertical motion of the lift arm.

Abstract: A legrest assembly including a calf support hinged to a forward end of a seat frame and moveable between a stowed configuration generally vertically disposed below the forward end of the frame and a deployed configuration inclined above the stowed configuration, a foot support movable with and telescopically connected to the calf support, and a foot rest pivotally connected to the foot support and pivotable between a stowed configuration substantially parallel to the foot support and a deployed configuration extending outward from the foot support.

Abstract: An articulating frame comprising parallel aligned base frame elements (2A, 2B) in a first plane adjustably connected to parallel aligned upper frame elements (4A, 4B) in a second plane, parallel to the first plane, the adjustable connection between any pair of connected base frame (2A, 2B) and upper frame (4A, 4B) elements comprising one or more knuckles (10A, 10B, 10C, 10D) each knuckle being capable of a combination of rotational and linear movement and operable independently of the others to provide both linear and rotational repositioning of a frame element (2A, 2B; 4A, 4B) relative to the other of the connected pair at the point of connection.

Abstract: The invention discloses an assistant standing seat comprising a base having a positioning nest and a locating recess, a driving module installed in the positioning nest of the base, a shearing device mounted in the locating recess of the base and a seat mounted on the shearing device, wherein the shearing device has a top plate, a bottom plate pivotally mounted to a front part of the top plate, a U-shape bracket pivotally mounted to a middle part of the bottom plate and a translational device moving between the U-shape bracket and the bottom plate. With the above means, a user's weight can be distributed to the top plate and the U-shape bracket to decrease a resistance force of the translational device when the translational device moves, and further avoid a difficult elevation of the assistant standing seat.

Abstract: A combination lift chair and reclining chair having additional seating and reclining positions is provided with two separate motors and linkages enabling the chair back to be independently placed in various positions and the seat separately movable with the footrest and elevated once the footrest has reached full deployment using the same motor.

Abstract: A lift chair includes a seat portion formed therein with an accommodating room that is closed atop by a plane; a cushion deposited on the plane; a lifter mechanism deposited in the accommodating room and having an upper end connected to a bottom of the cushion; and a power source serving to drive the lifter mechanism to operate, thereby lifting or lowering the cushion, horizontally moving the cushion, or tilting the cushion, and in turn assisting a user to stand up or sit down.

Abstract: A system comprises a vehicle seating system including a seat and at least one powered seat adjustment actuator for altering the seating position formed by the seat. Additionally, the system includes a controller for receiving at least one signal based on at least one vehicle/user event. For reducing fatigue, the controller controls slow seat movement while the vehicle is moving, and changes slow movement between first and second slow movements based on the vehicle/user event(s).

Abstract: A method for controlling the kinematics of a seat having movable portions and actuators for moving the movable portions between an initial position and a final position, at least one movable portion including a specific point, including the steps of establishing, for the specific point, an authorized travel conduit between the initial position and the final position, delimited by two lateral boundaries, calculating the current position of the specific point, establishing a target direction for the specific point that is suitable for moving the specific point in the conduit from the lateral boundaries and the current position, and modifying the direction of the specific point by controlling the actuators in order to force the specific point to move in the conduit.

Abstract: A seating unit that includes a linkage mechanism adapted to move the seating unit between seat-lift, closed, extended, reclined, and seat-lift positions is provided. The linkage mechanism includes a seat-mounting plate mounted to a footrest assembly, a base plate fixedly mounted to a lift assembly, a back-mounting link rotatably coupled to the seat-mounting plate, a seat-adjustment assembly with a bellcrank, and a linear actuator for automating adjustment of the linkage mechanism. In operation, a stroke in a first phase of the linear actuator generates a force on the bellcrank that translates the seat-mounting plate rearward in a consistent angle of inclination and rotates the back-mounting link from a reclined to an upright orientation. A stroke in a second phase acts to collapse the footrest assembly. A stroke in a third phase causes the lift assembly to raise and tilt the seating unit, thereby accommodating egress and ingress of an occupant.

Abstract: A seat supporting assembly (24) for supporting a seat (18), the assembly comprising a base (25) including a substantially elongated guiding rod (58), a seat support (36), a seat support-to-base linking member (56) pivotally coupled to the seat support (36) and sliding on the base guiding rod (58), a substantially elongated tilting member (60) having a guiding groove (66) and being pivotally attached to the seat support (36) and to the base (25). An actuating assembly (44) is coupled to the base (25) and includes a motion transmitting member (68) mounted within the guiding groove (60).

Abstract: A lift chair includes a seat portion formed therein with an accommodating room that is closed atop by a plane; a cushion deposited on the plane; a lifter mechanism deposited in the accommodating room and having an upper end connected to a bottom of the cushion; and a power source serving to drive the lifter mechanism to operate, thereby lifting or lowering the cushion, horizontally moving the cushion, or tilting the cushion, and in turn assisting a user to stand up or sit down.

Abstract: An adjustable chair (1) includes a control unit (2) having an on/off switch (24), an extending operation button (22), and a retracting operation button (23); a reciprocating unit (3) having a limit member (34), a screw-type slide (33) threadedly put on a lead screw (32) and adapted to move between the limit member (34) and a DC motor (31), and a linkage; and two foot, seat, and back adjustment units (4) disposed in the arms (12) respectively, each foot, seat, and back adjustment units (4) having a linkage so that pressing the extending operation button (22) will tilt a seat (14) and a back (13), and extend a foot rest (11).

Abstract: The invention provides a vehicle seat device in which a seat can be simply and reliably held at a storage position. In a vehicle seat (10), a vehicle width direction outer side end portion of a seat cushion (12) is supported so as to be capable of rotating around a drive shaft (30) having an axis along a vehicle front-rear direction, and the seat cushion can be switched between a seating configuration at which an occupant can be seated and a storage configuration at which the seat cushion (12) stands erect along a vehicle cabin inner side surface S, due to being rotated around the drive shaft (30) by a driving motor (42). Further, the vehicle seat (10) which is in the storage configuration is held at the storage configuration due to a striker (46) engaging with a seat dragger (48) and is configured such that the striker (46) is released from the seat dragger (48) at the time of switching to the seating configuration.

Abstract: A system (1) for adjusting the position of at least one seat component such as head rest (4), back rest (6), seat component (8), leg rest (10), or foot rest (12) of a passenger seat (2) of a vehicle, an aircraft passenger seat in particular, by means of actuators, a seat control (14, 18) being mounted locally on the aircraft passenger seat (2) and being provided with at least one operating element (15) and data being transmissible between the seat controls (14, 18) of a plurality of passenger seats (2), preferably of all passenger seats (2) of the vehicle, including data relating to the position of the seat components and/or data relating to operation of the actuators, and a common control unit (24; 124), characterized in that the seat control (14, 18) and the common control unit (24; 124) each has a data transmission unit (20, 21, 32, 34, 36) for wireless data transmission and an associated common control unit (24; 124).

Abstract: A raiser seat for assisting a person from a sitting to a standing position is described. The seat comprises: a seat frame (4); a seat (10) supported for movement relative to the seat frame between a lowered position and a raised position; and a movement mechanism for moving the seat between the lowered and the raised positions. The movement mechanism comprises at least one cam (104) and the seat rests on the at least one cam such that rotation of the at least one cam results in movement of the seat relative to the seat frame.

Abstract: According to the present invention there is provided a module for use with a chair having a seat portion supported by a support portion, for triggering movement of a person sitting thereon. The module is adapted for attachment to the chair between the seat portion and the support portion, and comprises a driving motor, a base platform adapted for fixed attachment to the seat portion, and an angled axis system (AAS). The AAS has a main rotary element having a main axis, and an auxiliary rotary element having an auxiliary axis and coupled with the first rotary element so that the auxiliary axis is oriented at an angle to the main axis. The module is designed such that when the main rotary element rotates about its main axis, the auxiliary rotary element also rotates about the main axis.

Abstract: An electrically operated seat slide apparatus includes a lower rail fixed to a floor of a vehicle body, and an upper rail slidably disposed to the lower rail. A seat is connected to the upper rail. A screw shaft is disposed inside the upper rail. A nut is threadedly connected to the screw shaft and connected to the lower rail. A motor is disposed to side of the upper rail. A gear box is fixed to the upper rail to transmit a rotation of the motor to the screw shaft. Additionally, first and second plates are provided for allowing an impact load applied to the upper rail to be directly transmitted to the screw shaft so as to prevent the impact load from being transmitted through the gear box to the screw shaft, and for setting a moving range of the nut.

Abstract: A seat structure capable of dealing with both a normal posture and a resting posture and providing sufficient relaxation in the resting posture while ensuring excellent comfortableness of an occupant. According to the present invention, a back frame 20 itself is fixed to a frame support 10 but a cushion frame 30 shifts from a first position A to a second position B according to an occupant's movement and an inclination angle of a pelvis support 31 increases accordingly. The occupant's pelvis portion and a portion lower than the pelvis portion is moved forward but a part of his or her back above his or her breast is not varied. With this structure, the same effect of the resting posture, that is, the posture in which the back frame is reclined in a conventional seat structure, can be obtained. Since the back is not tilted backward, a leg room (footrest) space in a rear seat is not limited.

Abstract: In a drive device for a vehicle seat (1), having a frame (10) which belongs to the vehicle seat (1), an output (14a, 14b) which belongs to the vehicle seat (1), is hinged to the frame (10) and is pivotable relative to the latter about an axis (A), and a geared fitting (16), the two fitting parts (16a, 16b) of which perform a relative rotational movement with superposed tumbling movement in a drive situation. One fitting part (16a) acts on the output (14a, 14b) and the other fitting part (16b) is supported on the frame (10). A transmission element (25, 35, 37) is provided between the fitting part (16a) which acts on the output (14a, 14b) and the output (14a, 14b). The transmission element (25, 35, 37) is torsionally rigid in the circumferential direction of the axis (A) and simultaneously flexible in the radial direction of the axis (A).

Abstract: An adjustable seat structure (1) extends over substantially the width of the seat. An electric drive unit (12) is on one side (4) of the seat but adjusts the seat structure (1) on both sides of the seat. Locks (17) for fixing the seat structure (1) are provided on both sides. The seat ensures a structurally simple adjustment and fixing of the seat on both sides. The adjustment forces are transmitted by the seat structure from the drive unit located on one side of the seat to the other side of the seat.

Abstract: A seat adjuster assembly includes an electric motor having an output shaft with a worm gear positioned in a gearbox, a spur gear meshing with the worm gear in the gearbox, a spindle shaft fixed to and driven by the spur gear coacting with a nut contained in a tube, and a linkage system connected to both a vertically movable upper vehicle seat part and a non-vertically movable lower vehicle seat part that positions vertically the upper vehicle seat part responsive to the position of the nut relative to the spindle shaft. At least one washer is provided on the spindle shaft. The spur gear is a plastic spur gear molded over the washer. A pair of leaf springs disposed in the gearbox bears against the spur gear and a wall of the gearbox.

Abstract: A chair having a first seat portion and a second seat portion pivotally connected to the first seat portion. The first seat portion and the second seat portion are movable between a first or lowered position and a second or raised position, and the first seat portion and second seat portion are disposed in substantially the same plane when the first seat portion and the second seat portion are in the first position. Also included is an actuator for moving the first seat portion and the second seat portion between the first position and the second position, and when the actuator is actuated, the first seat portion pivots relative to the second seat portion such that the first seat portion is located in a different plane relative to the second seat portion.

Abstract: An object of the present invention is to provide a seat apparatus enabling noise reduction and size reduction of a rotation transmitting mechanism. This seat apparatus is provided with a rotation transmitting mechanism capable of transmitting rotation to each of adjusting mechanisms. This rotation transmitting mechanism includes a motor, a worm, and two worm wheels each meshed with the worm and arranged in proximity to each other. This rotation transmitting mechanism also includes four clutch members. Each clutch member is interposed between corresponding one of the adjusting mechanisms and corresponding one of the worm wheels. Each clutch member is configured such that it can be switched between a transmission state and an interruption state. In the transmission state, rotation via the worm wheel can be transmitted to the corresponding adjusting mechanism. In the interruption state, on the other hand, transmission of the rotation is interrupted.

Abstract: A lift assist seat has a base, a cushion, and a chamber formed on the base. A motor capable of rotating both directions, a decelerator for reducing rotation speed of the motor, and a slider driven by the motor to reciprocatively move along a straight line are mounted in the chamber. A raiser is mounted beneath the cushion and has a plurality of support members jacking up the cushion to ascend when the slider is moved toward one direction to drive the support members, or lowering the cushion to descend when the slider is moved toward the other direction, thereby helping users sitting on the cushion to stand up or sit down.

Abstract: Dental devices with cylinders, trunnions, and limit switches, and a method are provided. The dental devices include a cylinder and a trunnion having a cavity and an outer surface. A portion of the cylinder is slidably mounted within the cavity of the trunnion, and a portion of the cylinder protrudes out of the trunnion. The limit switch is coupled to the outer surface of the trunnion, with the limit switch is operable to contact the cylinder. Separation of the limit switch and the cylinder causes actuation of the limit switch, and the actuation of the limit switch inhibits a downward movement of the device. Alternatively, the limit switch may be coupled to the portion of the cylinder that protrudes out of the trunnion, with the limit switch operable to contact the trunnion. As such, separation of the limit switch and the trunnion causes actuation of the limit switch.

Abstract: A rear seat for a motor vehicle with a seat part and a backrest which is upright in a seating position and folded down in a loading position, and in the loading position increases the loading space floor with its rear side facing a loading space of the motor vehicle is provided. The seat part is connected with at least one electromotive drive for translatorily adjusting and/or folding down the seat part from the seating position into the loading position and for translatorily returning and/or folding back the seat part from the loading position into the seating position.

Abstract: Office components are described that include a base, a seat supported by the base, a microprocessor, and a load sensor electrically coupled with the microprocessor and mechanically coupled with the seat and, based on movement thereof, operative to detect occupancy of the seat and provide a signal to the microprocessor indicative thereof. The load sensor may be a strain gauge, a piezo device or combination thereof.

Abstract: A moving workstation and its method of operation are described. A workstation described herein includes a chair and operator equipment that move together in a pivoting motion through an automatic, time-controlled program, where an orientation of the chair relative to the operator equipment is maintained during the pivoting motion. Such a workstation can reduce manpower requirements while improving vigilance of workstation operators.

Abstract: A method for controlling the kinematics of a seat (10) having movable portions (16, 18, 20, 22) and actuators (24, 25, 26, 27) for moving the movable portions between an initial position and a final position, at least one movable portion including a specific point (P1, P2, P3, P4), includes the steps of: establishing (102), for the specific point, an authorized travel conduit (C) between the initial position and the final position, delimited by two lateral boundaries (Z1, Z2); calculating (116) the current position of the specific point; establishing (118) a target direction for the specific point that is suitable for moving the specific point in the conduit (C) from the lateral boundaries and the current position; and modifying (122) the direction of the specific point by controlling the actuators in order to force the specific point to move in the conduit (C).

Abstract: A universal reclining armrest system for use with an articulated examination chair. The system includes an armrest adapter having a universal aperture for receiving a post portion of an armrest assembly. The armrest adapter further includes a splined peg for coupling to a pivoting mechanism of an articulated chair. The pivoting mechanism enables the chair to move throughout an operable range of motion while maintaining a fixed rotational position of an attached armrest adapter. The armrest assembly further includes an adjustable joint to provide 360° of rotational adjustment to the armrest relative to the fixed position of the armrest adapter.

Abstract: A system includes a lift chair having sensors embedded therein to determine various factors such as the amount of pressure exerted in various portions of the chair, the activity level of the chair user, whether the chair is occupied and which user is currently occupying the chair, and how much assistance the chair provides the user. The information detected by the sensors can be transmitted via the Internet, for example, to a third party device, such as a doctor's personal computer, which is also hooked up to the internet and is capable of receiving periodic updates to monitor use of the chair or modify the rules that govern the use of the chair. The user can override the pre-set rules for use of the chair by using an override button on a user control device.

Abstract: The present invention is related to one massage chair with slant angle adjustable chair frame, primarily comprising one basic frame, one chair frame, two first connecting members, two second connecting members and one linearly retractable actuator. The basic frame comprises one base frame and two support frames arranged in parallel and stretching up from said base frame. Every support frame has one first pivot portion and one second pivot portion. The chair frame has at least one set of massage chair, comprising one seat frame with two side frames. Every said side frame has one third pivot portion and one fourth pivot portion. Every first connecting member has one top end and one bottom end. The top end is pivotally connected to the first pivot portion of the corresponding support frame. The bottom end is pivotally connected to the third pivot portion of one corresponding side frame. Every second connecting member has one top end and one bottom end.

Abstract: A seat structure capable of dealing with both a normal posture and a resting posture and providing sufficient relaxation in the resting posture while ensuring excellent comfortableness of an occupant. According to the present invention, a back frame 20 itself is fixed to a frame support 10 but a cushion frame 30 shifts from a first position A to a second position B according to an occupant's movement and an inclination angle of a pelvis support 31 increases accordingly. The occupant's pelvis portion and a portion lower than the pelvis portion is moved forward but a part of his or her back above his or her breast is not varied. With this structure, the same effect of the resting posture, that is, the posture in which the back frame is reclined in a conventional seat structure, can be obtained. Since the back is not tilted backward, a leg room (footrest) space in a rear seat is not limited.

Abstract: Devices and methods are disclosed which relate to lifting a user from a seated position to a raised position. This is performed by incorporating a lifting mechanism into a seat coupled to a movable base portion. Actuators coupled to drive shafts enable a plurality of linkages to be raised and tilted, enabling the seat to rise at the push of a button or other triggering mechanism. A plurality of compressible springs enables an even balance between the weight of the human and the pressure of the lifting mechanism underneath the seat. As the lifting portion lifts the seat, an angle of the seat changes from a substantially horizontal position to a relatively angled position, mimicking the natural motion of the hips and thighs for humans needing assistance. Embodiments disclosed include using the device as a bedside toilet, having a removable bowl attached to the seat, or using the device placed over a toilet.

Abstract: The invention relates to a seat frame of a motor vehicle seat with a seat carrier having two side parts that are oriented transverse to a front axis and to a rear axis, a pivotal bridge being pivotal about at least one of said axes, said bridge comprising a tie bar and two side arms, and with an adjustment device having a motor-driven drive unit. The drive unit is arranged for pivotal movement about a hinge shaft that is substantially centered on that axis of the two axes about which said pivotal bridge is pivotal. Said hinge shaft is shorter than the distance between the two seat parts and is not in contact with said two seat parts, but if at all with only one side part. There is provided at least one inner arm that connects said tie bar to said hinge shaft and is located in proximity to said drive unit.

Abstract: Office components are described that include a base, a seat supported by the base. a microprocessor, and a load sensor electrically coupled with the microprocessor and mechanically coupled with the seat and, based on movement thereof, operative to detect occupancy of the seat and provide a signal to the microprocessor indicative thereof. The load sensor may be a strain gauge, a piezo device or combination thereof.

Abstract: A lift-recliner chair includes a base portion including a load bearing structural support frame having a pair of upstanding rigid side panels. The chair also includes a seat portion pivotally connected to and at least partially supported by the side panels. Moreover, the chair includes a back portion pivotally connected to the seat portion and an actuator assembly for moving the seat portion with respect to the base portion and the back portion with respect to the seat portion for altering the configuration of the chair. The actuator assembly is enclosed, at least partially, by the side panels.

Abstract: A patient chair for use in a dental operatory or the like generally comprises a base, a chair frame supported by the base, and a seatback support coupled to the chair frame. The seatback support is slidably movable relative to the chair frame. To provide a desired connection or fit between components, a locking assembly is configured to apply a clamping force between the seatback support and the chair frame.

Abstract: A linear motion actuator is disclosed in which an actuator shaft is held in a ready position by a latching ring. A spring is attached to the actuator shaft to exert a biasing force on the actuator shaft biasing it toward its actuated position. The latching ring receives one end of the actuator shaft and has locking elements that hold the actuator shaft in the ready position. A latching ring is rotated to selectively release the locking element. A shape memory alloy link extends partially around the latching ring and is secured to the latching ring. The link is shortened when current is applied to the link causing the link to rotate and release the locking element.

Abstract: A seat structure applicable to both a normal posture and a comfortable posture, in which a sufficiently relaxed resting posture is available and an excellent comfort is obtained while seated. A cushion frame is supported by a rear link plate and a front link plate, set such that the rear link plate within its movable range has a displacement angle larger than a displacement angle of the front link plate, and an angle between a side frame portion of a base frame and the rear link plate becomes smaller than an angle between the side frame portion and the front link plate when the plates are rotated and moved to the forward-most positions. Consequently, a seating surface angle of the cushion frame increases as the rear link plate and the front link plate are rotated and moved forward. An inclination angle of a back frame itself does not vary but the seating surface angle of the cushion frame can be varied according to a movement of a person.

Abstract: A seat apparatus includes a seat cushion on which an operator is seated, a seatback for supporting the operator seated on the seat cushion, a seat drive device changing a position of the seat cushion and the seatback between a seating position and a storage position by operating the seat cushion and the seatback, and a control unit for controlling the seat drive device, the control unit controlling the seat drive device in a way that an operation starting time of the seat cushion does not coincide with an operation starting time of the seatback and an operating time of the seat cushion overlaps temporally an operating time of the seatback when the seat cushion and the seatback are moved between the seating position and the storage position such that an interference of the seat cushion and the seatback is restricted.

Abstract: A massage chair including an electric reclining mechanism for moving a backrest into different sloping positions, a holding mechanism for holding at least one forearm of a user to fix to the base side, and a controller that controls operations of these mechanisms. The controller allows the holding mechanism to hold the at least one forearm and allows the electric reclining mechanism to move the backrest into at least one sloping position before moving the backrest into a final position. An inclination of the at least one sloping position from a sloping position of the different sloping positions when the at least one forearm is held by the holding mechanism is smaller than an inclination of the end position from a sloping position of the different sloping positions when the at least one forearm is held by the holding mechanism.

Abstract: A vehicle seat slide device includes a lower rail formed so as to include a first opening portion opening upward and fixed at a vehicle floor, an upper rail supported by the lower rail through the first opening portion so as to be slidable and supporting a vehicle seat, a screw member provided between the upper rail and the lower rail so as to extend in a sliding direction thereof, a nut member fixed at the lower rail and threadedly engaged with the screw member, a covering member formed so as to include an upper wall covering the first opening portion and fixed at the lower rail, a driving mechanism generating a driving force by which the screw member is rotated relative to the nut member so that the upper rail slides relative to the lower rail and the screw member positioned below the upper wall of the covering member.

Abstract: A wheeled chair for assisting a user in changing a disposition. The chair comprises: a base member, a substantially planar seat member, a leg bracing member, a back bracing member, a bracing motor, and an actuator module. The base member includes a plurality of wheels and a lift device. The seat member is oriented substantially orthogonal to the direction of motion of the lift device. The leg bracing member includes a first mode wherein it extends downwardly from the seat member and a second mode wherein it extends substantially collinearly from the seat member. The back bracing member includes a first mode wherein it extends upwardly from the seat member and a second mode wherein it extends substantially collinearly from the seat member. The bracing motor changes between the two modes. The lift device includes a lift device motor. The actuator module activates the bracing and lift device motors simultaneously.

Abstract: When a seat back in a forwardly folded state is raised to a predetermined raised state by activating an electric motor by turning on a switch, the electric motor is immediately stopped even if the switch is still turned on, and the seat back is retained in the raised state. There are provided a locking member which operates to retain the seat back in the raised state when the seat back is in the predetermined raised state and a lever which turns in association with the operation of the locking member. The lever turns on another switch to open a drive circuit for the electric motor.

Abstract: An apparatus for tilting a vehicle seat cushion raises the front end to be higher than the rear end of the seat cushion in order to enhance a supporting force for an occupant seated in a vehicle seat, thereby preventing the occupant from being pushed forwards in the event of sudden braking. The apparatus includes a cushion tilting unit installed in the seat cushion, wherein the cushion tilting unit raises a front end of a seat cushion to be higher than a rear end of the seat cushion without adjusting an angle of the seat back.

Abstract: A diagnostic system for use in the electronic control circuit for motor actuated lift and/or recline mechanisms for chair wherein a hand controller is used to operate said lift and/or recline mechanisms, and wherein a series of LED indicators are situated at strategic locations in the circuit. The LED indicators can be used to determine whether electricity is flowing to such points in the circuit, which in turn will enable possible problems that might cause the hand control device not to work properly to be quickly more easily pinpointed by immediately narrowing the potential sources or causes of the problem.

Abstract: A lift-recliner chair includes a base portion and a seat portion pivotally connected to the base portion about a first pivot axis. The chair also includes a back portion pivotally connected to the seat portion about a second pivot axis and an actuator assembly for moving the seat portion with respect to the base and back portions with respect to the seat portion to alter the chair configuration. The base portion includes a pair of substantially vertical side panels and a rear panel extending between the side panels. The seat portion includes a seat frame having a pair of substantially vertical side panels arranged substantially parallel with and adjacent to the respective side panels of the base portion and a curved rear panel extending between the side panels of the base portion. The center of curvature of the curved rear panel is substantially coincident with the first pivot axis.

Abstract: A vehicle seat has a base, a front pivotable link indirectly pivotably attached to the base, a rear pivotable link pivotably attached to the base, a seat frame, a seat cushion supported on the seat frame, and a backrest that is mounted on the seat frame by way of a fitting defining a backrest pivot axis. The seat frame is pivotably attached to the front pivotable link. The seat frame is pivotably attached to the rear pivotable link in a manner that defines a pivot axis (41) about which there can be relative pivoting between the rear pivotable link and the seat frame. The height and/or inclination of the seat cushion is adjustable relative to the base by moving the pivotable links. The pivot axis (41) is positioned rearwardly of the backrest pivot axis in at least one position of adjustment of the seat cushion and/or of the backrest.

Abstract: A chair (1), in particular a dentist's chair, which has a seat (3) and a backrest (2) which are connected with each other by means of a hinge (6) consisting of two movable parts in the from of an inner ring (8) and an outer ring (7) disposed concentrically therewith. The inner ring (8) is secured to the seat (3), while the outer ring (7) is secured to the sear (3). The outer side of the inner ring (8) engages the inner side of the outer ring (7), a ball bearing (11, 12) being mounted between the inner ring (8) and the outer ring (7). The invention provides a dentist's chair where the armrest follows the movement of a user's back.