Abstract: A vehicle seat which is adjustable both with regard to its height and angle of inclination has front and rear height mechanisms which can be operated independently of one another. Each of the height adjustment mechanisms has at least one lever, which levers are pivotable about an axis running in the lateral direction of the seat. The upholstery support of the seat is supported on support points of these levers, which lie at a distance from their pivot axes. The front and rear height adjustment mechanisms are connected with a coupling drive, which, when the front height adjustment mechanism is activated limits the height adjustment of this front height adjustment mechanism, and when the rear height adjustment mechanism is activated, the height adjustment of the support point thereof is transferred to the support point of the front height adjustment mechanism.

Abstract: A mechanical seat suspension inside a housing comprises parallel scissor arms and a support arm with a cam connected to suspension springs. The support arm, which carries the substantial majority of the seat load, has a height adjustment mechanism and a cam with two arcuate surfaces that define an imaginary pivot point. The use of the cam with the imaginary pivot point permits a more compact structure. Various embodiments of the support arm with a cam end and devices using the support arm are also disclosed. A shock absorber attached to the outside of the scissor arms dampens the stroke of the suspension springs connected to the cam. The ratio of the shock stroke travel to the vertical movement of the seat remains generally linear and constant, thus producing a more comfortable ride. Also included is a height adjustment mechanism on the support arm that interlocks with the cam by a pivoting pawl and biasing spring.

Abstract: A power seat lifter device for an automotive seat assembly has electrically powered servo systems for adjusting height position at a front end portion and a rear end portion of the vehicular seat. The servo systems are concentrically arranged along one side of the vehicular seat so as to form enough space for permitting lowering of the seat cushion height.

Abstract: A power seat track apparatus for selectively positioning an automotive vehicle seat is adapted to be powered by an electric motor drive, preferably with separate motors for each drive direction. The seat back is mounted on the upper track of the seat track mechanism for horizontal drive with the track. The vertical drive through front and rear torsion tubes or bars act on only the seat pan and seat cushion but not on the seat back. Since the vehicle shock loading requirements must be met by the structural seat pan or seat frame, the pan for holding only the seat cushion may be reduced in size as compared to the usual power seat frame. The front of the seat cushion is interconnected with the pan through a lost motion pivot and the rear portion of the seat cushion is interconnected with the seat pan through a fixed pivot connection whereby simultaneous elevation and shortening of the seat cushion with respect to the seat back is effected.

Abstract: A compact and inexpensive height adjustable base for a video display. The invention provides height adjustment while maintaining a constant screen orientation with respect to the horizontal. This base is designed for a seated user. It keeps the footprint of the base to a minimum, and by proper shaping, allows most keyboards to share some of its footprint area. The minimum height is only slightly higher than the height of non-adjustable bases, and the maximum height is selected to provide a convenient height for viewing by operators of any stature, and to keep the structural requirements of the stress bearing components low. By keeping the structural requirements low, the material and assembly costs may be kept low, leading to a cost effective height adjustable base.

Abstract: A vehicle seat which is adjustable in height and which affords automatic adjustment to the seat occupant weight comprises a gas spring between a seat frame and a base frame, a valve arrangement actuable by an actuating element to adjust the pressure in the gas spring in dependence on the weight of the seat occupant, and a means for setting the desired seat height. Disposed between the seat and base frames is a belt reel device with a coupling means, which like the gas spring, can be subjected to the action of pressure gas from a pressure source. The pressure source comprises a compressor driven by a drive motor, which are disposed on the vehicle seat. The valve arrangement includes a 2/2-way valve which serves only for the release of pressure gas from the gas spring, and a 3/2-way valve between the pressure source and the coupling means of the belt reel device. The valve arrangement may be mechanical/pneumatic in operation or may be controlled by an electronic control arrangement.

Abstract: A power seat for an automobile wherein the seat cushion is adjustable in height or in a fore-and-aft direction by means of an electric motor. In such power seat, an upstanding bracket is provided on a slide rail adapted to permit fore-and-aft sliding movement of the seat cushion, and the electric motor is disposed at the lateral surface of the bracket. Hence, there is no need to dispose the motor beneath the seat cushion, and the seating point is lowered more, giving a wide space in the cabin of the automobile.

Abstract: An operation mechanism of a lifter for an automotive seat, including a drive mechanism, a drive shaft operatively connected with the drive mechanism, a gear fixed on the drive shaft, a pair of first and second latch pawls engageable with the gear, and a switch-over cam for selectively disengaging one of the two latch pawls from the gear, with the other of them remaining in engagement with the gear, which forms a ratchet structure. Such actuation of the switch-over cam is effected by drawing out or retracting the handle of lever provided with the mechanism. Thus, the rotational direction of the gear is set by drawing out or retracting the handle, which causes raising or lowering of the seat through the drive mechanism.

Abstract: An automotive seat with a suspension device has an X-shaped link mounted between an upper seat frame and lower floor frame. The X-shaped link is equipped with a seat belt anchor and a sublink link slideably connected between one of the link members of the X-shaped links and the lower floor frame. The sublink has an elongated hole at one of its ends which is slideably engaged to a pin on one of the link members of the X-shaped links. The other end of the sublink is pivotally connected to the lower floor frame. When a force is exerted on the seat belt anchor, it is transmitted through the sublink directly to the floor, thereby preventing damage or deformation of the suspension device. Further, when the suspension is contracted, the X-shaped link and the sublink are hidden behind the upper and the lower frames thereby creating a suspension device with a very low profile.

Abstract: A mobile painter's service cart having an upper frame and a lower frame interconnected by parallel scissors-type linkages. The linkages on opposite sides of the cart are connected by transverse axles and a latching arm engages one of the axles to latch the linkage in adjusted position. The upper frame has a paint tray which can be covered by a pivoted cover having opposite support surfaces. A reversible hinge is provided to enable the cover to be reversed on the tray.

Abstract: A height adjusting device for a vehicle seat, in which are provided a height adjusting mechanism and a seat surface inclination adjusting mechanism. The height adjusting mechanism includes a linkage between a seat frame and base frame, with brackets fixed at the seat frame, whereas the seat surface inclination adjusting mechanism includes a tilt link connected with the linkage and bracket of the height adjusting mechainsm in a manner to be movable independently of the latter. Thus, the seat is adjusted in height and in inclination angle, independently, by operating each of those two mechanisms, without coactive influences therebetween.

Abstract: A seat height and tilt mechanism for a vehicle seat has separate hand wheel controlled adjustors for adjusting the seat height and tilt having a control lever which can be moved relative to the seat base and a system of pivoted links which results in the seat as a whole being raised or lowered, the control lever then alternatively being locked relative to the seat base, the front edge of the seat then being lifted to tilt the seat.

Abstract: An exercising bench includes a horizontal platform mounted on a plurality of support units which engage racks suspended from the platform for adjusting the elevation of the platform. The support units each have a pair of inner legs and a pair of outer legs pivotally connected together. The outer legs are pivotally and fixedly connected to the platform and the inner legs have a bridging member connected therebetween which engages the suspended racks to permit height and angular orientation adjustment of the platform relative to the ground.

Abstract: A stowable vehicle seat has a cushion frame supported by a parallel link arrangement positioned outboard of the seat and inboard a pair of upstanding side plates to permit optimal downward folding of the seat cushion. A latch arrangement is provided for establishing various positions between an operative elevated position and a stowed position.

Abstract: A seat lifter for a vehicular seat comprises spaced side base members; and front and rear lift mechanisms which are mounted on front and rear portions of the side base members for adjusting the heights of front and rear portions of a seat cushion respectively. Each lift mechanism comprises a pivot shaft extending across the side base members, brackets secured to the pivot shaft to rotate therewith, arm members pivotally connected to the brackets and connected to the seat cushion, a sector gear pivotally connected to one of the side base members and pivotally moved together with the pivot shaft, a pinion meshed with the sector gear, and a handling knob mounted on the side base member and having the pinion connected thereto.

Abstract: A stowable seat assembly is provide with a simple latch link cooperating with the seat cushion frame to adjustably position the seat as it folds to a stowed position controlled by a parallel link arrangement. A gas spring assist is also provided for returning the seat cushion to its normal elevated position after stowing and an auxiliary linkage is provided for coordinating the motion of seat belt componentry mounted on the seat with the stowing motion of the seat cushion.

Abstract: A load bearing structural assembly comprising a threaded lead screw having a central axis, the lead screw having a mounting mechanism and an anchor mechanism affixed to one end thereof; the lead screw having mounted thereon a first drive nut having an opening therethrough, the first drive nut having a predetermined load bearing capacity, the structural assembly having a second drive nut having an opening therethrough the second nut affixed to the first drive nut, the second nut having a much greater predetermined load bearing capacity than the first drive nut; the structural assembly having a collet having an interior and exterior, the collet in communication with the exterior surface of the second drive nut upon the interior of the collet, having an opening therethrough, having a transmission mechanism affixed to the first drive nut and the collet, when the transmission mechanism subjects a load upon the first drive nut in a direction along the lead screw, such load will be subjected upon the collet which wi

Abstract: A height adjustable load carrying platform (7) wheel mounted for steering or crabbing movement and comprising at least three concertainable lazy tongs lattices of struts (5) forming a 3 sided pyramid which can be raised and lowered manually or under power, and includes a counterbalance mechanism (67). The structure replaces a conventional pedestal support for a camera or the like (such as T.V. camera) and is capable of being extended up to normal pedestal height, but is also capable of contracting to a lower minimum height than that of a conventional pedestal. Three and four axis hinges are described to permit the articulation at the corners.

Abstract: A vibration compensating vehicle seat suspension combines the vertical movement of the parallelogram suspension with the pivoting of the knee-pivot suspension. Three embodiments all include a horizontal pivot for pivoting of the seat, and a sublinkage for simultaneous vertical movement of the seat. A first embodiment includes a horizontal pivot and a vertical slide for sliding of the pivot. A rocking lever which rocks due to pivoting of the seat causes sliding of the pivot. A second preferred embodiment includes a horizontal pivot and a linkage for vertical movement of the front of the seat. A third preferred embodiment includes a horizontal pivot, a vertical slide, and a spring for biasing the pivot.

Abstract: A height adjusting device for an automotive seat comprising a forward seat height adjusting mechanism adapted for height adjustment of the forward part of a seat cushion, a rearward seat height adjusting mechanism adapted for height adjustment of the rearward part of the seat cushion, a control mechanism which is operatively connected with those two height adjusting mechanism, and a pair of first and second sprocket wheels with an endless chain wound thereabout are arranged between the rearward height adjusting mechanism and control mechanism. Thus, a rattling or wobbling is avoided in the rearward height adjusting mechanism.

Abstract: A mechanical seat suspension inside a housing comprises parallel scissor arms and a support arm with a cam connected to suspension springs. The support arm, which carries the substantial majority of the seat load, has a height adjustment means and a cam with two arcuate surfaces that define an imaginary pivot point. The use of the cam with the imaginary pivot point permits a more compact structure. Various embodiments of the support arm with a cam end and devices using the support arm are also disclosed. A shock absorber attached to the outside of the scissor arms dampens the stroke of the suspension springs connected to the cam. The ratio of the shock stroke travel to the vertical movement of the seat remains generally linear and constant, thus producing a more comfortable ride. Also included is a height adjustment mechanism on the support arm that interlocks with the cam by a pivoting pawl and biasing spring.

Abstract: An air-sprung vehicle seat includes an air spring and a scissors linkage which are operative for adjusting the vertical height of the seat. The vehicle seat also includes a locking device for adjustably fixing the vertical height of the seat, the locking device including a fixing element which is articulated to the scissors linkage and a fixing device which is engageable with the fixing element for fixing the relative position thereof in the seat. The seat also includes a non-return valve which is responsive to actuation of the fixing device for controlling the admission of compressed air into and the escape of compressed air from the air spring.

Abstract: An improved universal mount system for receiving a sensing device positionable in a plurality of locations and orientations comprising in combination a base having a plurality of threaded leveling lugs extending therethrough for independent adjustment of the corners of the base, the base also having upwardly extending plates with apertures therethrough; a table having a pair of downwardly depending plates each with an arcuate slot and a thumb bolt extending therethrough into the aperture of an adjacent upwardly extending plate for tilting of the table with respect to the base; and a platform having an instrument mounting bolt extending through an elongated slot for mounting of an instrument to the platform, the platform also including a linkage for coupling parallel upper and lower plates for elevational adjustment purposes.

Abstract: A self leveling table for holding articles on the table at a constant level regardless of the number of articles on the top of the table with the self leveling table including a pair of scissor arms that are restrained from closing by a set of springs whose compression force can be adjusted, the scissor arms pivotally mounted in the table with one end of the springs including a cam bar with a pair of cam followers for engaging cam surfaces on the scissors arms to smoothly control the raising and lowering of the self leveling table when materials are added or removed from the table and spaced lifting surfaces on the self leveling table, to permit an operator with a forklift to move the self leveling table.

Abstract: A seat suspension includes a device which is responsive to a sensor which detects the condition of the road surface being traversed by the vehicle in a manner to produce relatively hard suspension characteristics when the vehicle is running on a rough road and softer characteristics when traversing a road having a smooth surface. The suspension of the vehicle if equipped with variable hardness type shock absorbers can be controlled in parallel with the seat suspension to improve the ride. Additional sensors which sense parameters such as acceleration, braking, steering angle, vehicle speed etc., can be used to control the setting of the seat suspension in addition to the basic road condition control.

Abstract: A lifter for an automotive seat, comprising a drive assembly including a long forward link member and a short rearward link member, and an operation mechanism including a drive shaft, a housing rotatably provided on the drive shaft, a gear provided in the housing, the gear being connected to the drive shaft, and a pair of first and second pawl members rotatably pivoted in the housing, with such arrangement that either of those pawl members is selectively brought to engagement with the gear by means of a switch-over cam. An operation lever is equipped with the housing, and both drive assembly and operation mechanism are operatively connected together. Thus, repeated reciprocal rotation of the operation lever attains an easy adjustment of the seat at a desired higher or lower level in a swinging manner, which permits a small rotation range of the operation lever.

Abstract: An infant incubator mattress positioning assembly having a pair of lift mechanisms spaced apart on the deck of the incubator. Each lift mechanism includes a scissor linkage which is operated by a lead screw mechanism. The mattress tray, positioned on the free ends of the links of the scissor linkages, is moved by turning a crank in the lead screw mechanism of each lift mechanism.

Abstract: A suspension system has a base, mountable to the floor of a vehicle, and a frame above the base. The base and frame are coupled by a linkage, for example two, spaced pairs of crossed links. A mechanical spring, preferably in the form of a torsion bar, is mounted in one of the base and frame. A lever is coupled to the spring means. A roller assembly mounted in the links is movable along the lever arm to vary its length and to act as a fulcrum. The lever has a cam lobe so that movement of the roller assembly arcuately moves the torsion bar to preload same, as the length of the lever arm is altered. Varying the length of the lever arm and the preloading of the spring responsive to differing occupant's weights maintains constant natural frequency and centers the suspension system in the ride zone.

Abstract: An improved pivot assembly comprising a pivot mechanism upon which a seat adjuster pivots, a bracket mechanism having an elongated slot in which a fastening mechanism for the pivot mechanism is contained, a lining portion affixed to the bracket mechanism the lining portion having flanges extending through the elongated slot laterally away from the lining portion, the flanges having a predetermined curvature, a fastening mechanism passing through the lining portion, bracket mechanism and pivot mechanism, whereby when the fastening mechanism is affixed to the pivot mechanism through the bracket mechanism the flanges of the lining portion are biased against the fastening mechanism, thereby the tolerance of the improved pivot assembly are optimized to allow a minimum of play or chuck amongst the components therefor.

Abstract: A scissor mechanism is provided with two scissor arms (1,2) and a hydraulic cylinder (12) which extends between engagement points on the scissor arms (1,2) which are offset from the common bearing (3) of the scissor arms. Between the scissor arms there is provided a wedge mechanism (18,19) comprising a pressure roller (18) and a pressure wedge (19). The pressure roller (18) is mounted on a displaceable sleeve (15) which serves as the engagement point for the hydraulic cylinder at one of the scissor arms (1). By displacement of the sleeve (15) the scissor arms (1,2) are wedged out of their originally parallel position (FIG. 1).

Abstract: The device comprises longitudinal adjustment slides for the seat. Each of the slides has a mobile element with an upper face carrying L-shaped supports with vertical wing portions. The vertical wing portion carries at least one mechanism having a control shaft for driving a rocking lever in rotation having a front end which cooperates with an intermediate part rigidly connected to a side portion of a framework of the seat. The rear end of the rocking lever cooperates with a front portion of a second rocking lever which is articulated on the vertical wing portion and has a rear portion which is mounted in a rear portion of the framework of the seat.

Abstract: A vehicle seat which is adjustable both with regard to its height and angle of inclination has front and rear height mechanisms which can be operated independently of one another. Each of the height adjustment mechanisms has at least one lever, which levers are pivotable about an axis running in the lateral direction of the seat. The upholstery support of the seat is supported on support points of these levers, which lie at a distance from their pivot axes. The front and rear height adjustment mechanisms are connected with a coupling drive, which, when the front height adjustment mechanism is activated limits the height adjustment of this front height adjustment mechanism, and when the rear height adjustment mechanism is activated, the height adjustment of the support point thereof is transferred to the support point of the front height adjustment mechanism.

Abstract: A height adjusting device for an automotive seat which is actuated by rotation of a drive rod through a gear and link mechanism. The seating height adjustment is locked and unlocked by means of a stopper and lock gear mechanism. A lock releasing means is provided in the stopper and lock gear mechanism such that raising and lowering of an operation lever causes the disengagement of the stopper from the lock gear though the lock releasing means to permit a desired higher or lower seating height adjustment, without any other special operations. The lock releasing means comprises a wire member and release plate.

Abstract: A vibration compensating vehicle seat suspension combines the vertical movement of the parallelogram suspension with the pivoting of the knee-pivot suspension. Three embodiments all include a horizontal pivot for pivoting of the seat, and a sublinkage for simultaneous vertical movement of the seat. A first embodiment includes a horizontal pivot and a vertical slide for sliding of the pivot. A rocking lever which rocks due to pivoting of the seat causes sliding of the pivot. A second preferred embodiment includes a horizontal pivot and a linkage for vertical movement of the front of the seat. A third preferred embodiment includes a horizontal pivot, a vertical slide, and a spring for biasing the pivot.

Abstract: A height adjusting device for an automotive seat which is actuated by rotation of a drive rod through a gear and link mechanism. The seating height adjustment is locked and unlocked by means of a stopper and lock gear mechanism. A lock releasing means is provided in the stopper and lock gear mechanism such that raising and lowering of an operation lever causes the disengagement of the stopper from the lock gear though the lock releasing means to permit a desired higher or lower seating height adjustment, without any other special operations. The lock releasing means comprises a wire member and release plate.

Abstract: A seat suspension mechanism providing a vertical range of cushion travel to a tractor seat when fluid is supplied to the mechanism. The suspension mechanism includes a linkage assembly movable through a predetermined path of travel for securing the seat to the frame and a damper assembly operable in combination with the linkage assembly for regulating the cushion travel of the seat. The present invention further includes an automatic seat stop mechanism connectable to the suspension mechanism for limiting the movement of the linkage assembly and the seat upon cessation or interruption of fluid flow to the seat suspension mechanism.

Abstract: A height adjusting mechanism for a physical therapy bench has great lifting height due to levers extending at an angle with each other in one end position which are made to coincide approximately midway in their movement, said movement being permitted to continue in said levers passing each other and in their other end position again extending at an angle with each other.

Abstract: An air spring seat principally for buses, trucks, boats or other vehicles includes a manual air pump for inflating and deflating the air spring. The manual air pump includes a piston having a rearward air intake stroke, a forward compression stroke to deliver pressurized air through a check valve delivery and venting system to the air spring, a pressure stablized at rest position at the end of the compression stroke and a forward venting stroke from the at rest position mechanically to release air from the air spring through the check valve delivery and venting system. A floating seal carried by the piston provides a fluid tight seal between the piston and pump body during the piston compression stroke but permits air to move from the intake side of the piston to the compression side of the piston during the piston intake stroke. The piston movements are all controlled by a manual lever handle readily accessible to the seat occupant.

Abstract: A chair for rendering service to customer includes a base member affixed to a stationary support such as a floor, a seat structure and an adjustment device interposed between the base member and the seat structure for adjusting the vertical distance between the seat structure and the base member. The base member is disposed beside the seat structure seen in a horizontal direction. By operating the adjustment device which includes articulated arms and a pushing member, the seat structure is moved in a vertical direction as the adjustment members of the adjustment device are pivoting about their points of fixation. The articulated arms and the pushing member are preferably arranged to be pivoted in a horizontal plane about a vertical axis in the base member.

Abstract: This device comprises at least one pair of screw-and-nut elements cooperative with the fixed and movable parts in respect of which elements the screw angle is large enough to ensure that the efficiency of the translation to the rotation is slightly positive, and is provided with means for locking the rotary element of the pair after adjustment of the position of the movable part. This system permits the locking of the movable part in the chosen position by a relatively small force as compared to the forces to which the device is subjected. The device is useful for adjusting a table guide of a woodworking machine, or for adjusting a car seat or the seat of a stool.

Abstract: A seat for motor vehicle includes a seat cushion whose rear or front section or both are coupled via a link mechanism with a base frame in a manner that can be lifted and lowered, whereby through joining of the link mechanism to a control shaft for height adjustment that can be rotated without any limitation, coupling of one of the rocking ends of a bell crank which repeats a rocking motion, interlocked with the rotation of the control shaft, to the seat cushion, and joining of the other rocking end to the control shaft via a crank, it is possible to adjust the height of the rear section, front section, or both, of the cushion seat between the lowest position and the highest position, for every rocking operation of the bell crank.

Abstract: A manually operable seat adjustor assembly that combines the ease of operation of a long lever actuator, with the compactness of a short handle actuator. A handle assembly including an outer casing and an inner push rod movable within is pivoted to the side of the seat pan in common with a rear link of the seat supporting linkage. The tip of a locking rod passes through one of a series of positive detents, through a straight slot in the rear link, and through a clearance slot in the casing that has a straight portion alignable with the rear link straight slot. When the slots are so aligned, pushing on the push rod moves the locking rod tip out of the detent to free the linkage and into the aligned slots to rigidly hold the handle assembly to the rear link. Then, the linkage may be easily moved with the mechanical advantage of the entire handle, but when the handle is released, it pivots down freely under its own weight about the common pivot to an out of the way stored position alongside the seat pan.

Abstract: A mechanism for adjusting the height of a vehicle seat (13) comprises a pair of front and rear bell cranks (16, 19) pivoted on a fore and aft seat slide (12) at each side of the seat. One end (15, 18) of each crank is pivoted to the front or rear of the seat and the other ends (23, 24) are interconnected by a link (23).Height adjustment is achieved by turning one of the cranks by a handle (31).

Abstract: An apparatus for adjusting the height of a seat for an automobile has a handle disposed on a seat adjuster, a spring coupler operatively connected to the handle, a link operatively connected to the handle through the spring coupler, and a rod for connecting the link to a link disposed on the other side. A balance spring is incorporated in the spring coupler, one end of the spring being retained by a casing, and the other end of the spring being retained by a driven member. Accordingly, the balance spring is advantageously suitable for balancing the seat within the seat height adjustable range.

Abstract: The seat lifter according to the invention includes a front and rear links supporting the upper bracket member and the upper bracket member has a first upper bracket supporting a seat cushion of the seat and a second upper bracket supporting a seat back of the seat. Thus, the seat back and seat cushion of the seat are respectively moved in the independent state. Particularly, a pair of second pivoting member respectively pivoting the front and rear links on the first upper bracket positions approximately in a rear direction in respect of a pair of first pivoting member and a pair of third pivoting member respectively pivoting the front and rear links on said second upper bracket positions approximately in an upper direction in respect of said first pivoting. In accordance with lifting the seat cushion by rotating the both links around the first pivoting member, the seat back moves in a forward direction and the size of the seat cushion is minimized.

Abstract: A portable martial arts device for rigidly holding one or more boards to receive a karate blow or the like. The device comprises a freestanding framework and a board holder mounted on the framework for rigidly holding parallel edge margins of one or more boards thereby to position the boards for receiving a karate blow or the like. A mechanism is provided for mounting the board holder on the framework for pivotal movement about a generally horizontal axis thereby to permit adjustment of the angular position of one or more boards in the holder. The framework is adapted for adjustment of the height of the board holder, thereby permitting adjustment of the height of boards in the holder.

Abstract: A straight line motion mechanism is formed from a pair of parallelogram linkage mechanisms in combination with motion control means interconnecting the linkage mechanisms to provide for uniform angular displacement thereof. The mechanism is particularly adapted for use in supporting an object, such as a table top, for vertically directed stepwise movement or one step shifting between lower and upper reference positions corresponding to table top heights convenient for use alternatively by a person in seated and standing positions. In a preferred embodiment, means are provided to enable a user to selectively make fine adjustments of the height of the table top after it has been shifted into either of such lower and upper reference positions.

Abstract: This invention relates to adjustable seats and components therefor including mechanisms for assisting in their adjustability and a hand-operated lever employed for both adjusting the inclination and height of the seat cushion above the base of the seat and positioning and moving the seat longitudinally.

Abstract: The instant invention relates to a loading system for loading semiconductor wafers into a diffusion tube. The combination of a track and a loader trolley designed for the track is disclosed, along with mechanisms for coarse and fine adjustments of the height of the loader platform of the loader trolley. These adjustments can be made without any shims or spacers.

Abstract: Lifting device or load-supporting apparatus for use in workshops. The apparatus is connected to a stand arranged on the floor by means of scissor-like connecting rods, at least two of the connecting rods are each coupled to an axle carried by the stand. The height of the rods are adjustable via at least two spring units which has a completely relaxed starting position. The two spring units are each connected to a bearing and an abutment over the entire lifting height of the load-supporting apparatus. A locking apparatus is associated with the spring units which permits the starting position of at least one spring unit to be fixed at different lifting heights.