Abstract: A snowmobile stand is provided for elevating the snowmobile motor driven track. The stand has a generally A-shaped base with an elongated member bent to form a V-shape and having an apex and two opposing spaced-apart legs. A transverse member extends between these two legs. A snowmobile support extends vertically from the A-shaped base. The support includes a channel member at its upper end for receiving the rear bumper of a snowmobile and a rectangular shield plate. This channel member has a generally planar base with angled front and rear walls. The channel member is located at the top of a selectively adjustable inner tube member positioned within a sleeve member. This inner tube member can telescope within the sleeve member to a desired height. Once at the desired height, the inner tube member is fastened to the sleeve member. The sleeve member removably secured to the base and thus can be removed from the base to enable storage of the snowmobile stand in a generally flat arrangement.

Abstract: A parts holder comprises a tray and a vertically extensible and retractable support for supporting the tray in selected vertically adjusted positions. A brace in the form of a foot rest is secured to the support beneath the tray in selected vertically adjusted positions independently of the tray.

Abstract: A guide sleeve structure for guiding and supporting the cylinder in the spindle guide tube comprising vertical guide webs(110) formed toward the spindle between the radial line of the ribs(130), and the vertical guide grooves toward the spindle in response to the ribs(130) to structurally withhold the expanding and the shrinking of the slide gap caused by the change of temperature.

Abstract: An improved industrial chair having a mechanism for adjusting the position of a support column in relation to a fixed platform, such as a chair base portion. The chair comprises a support column having an exterior surface with a plurality of engaging surfaces arranged along the length of the column for selectively engaging portions of a coupling. The coupling is shaped for selectively engaging the support column and positioning the support column relative to the fixed platform. The coupling has an inner surface shaped for contacting the support column engaging surfaces in a substantially matched shape friction fit, and the coupling further has an adjustable circumference structure for permitting selection between locking engagement and relative movement between the support column and the coupling. The chair further has structure suitable for operably retaining the coupling in fixed relation to the support platform.

Abstract: A gas cylinder with an outer steel tube which has its lower end of a smaller diameter. Into the upper end of the tube a plastic bushing provided with longitudinal radial ribs is inserted under pressure. This bushing has two annular reinforcing portions separated a certain distance from each other, with the ribs being situated further back in this separation, so that staggered housings are produced all around the profile, in which hook-type fins are received, with semi-punched material on the wall of the tube. At the lower end, an inverted bowl is placed, with its edge supported on a flange on the end of the tube.

Abstract: A longitudinally adjustable column for chairs, tables or the like, comprising a vertical tube and a longitudinal adjusting element arranged inside the tube. The longitudinal adjusting element has a cylinder with an axially movable piston rod, and is mounted on a base plate which is held in place inside the tube. The base plate is held in place on one side by an inwardly-bent deformation of the vertical tube, and on the other side by at least one supporting surface on the inner wall of the vertical tube. The deformation is formed by bending a face at one end of the tube in the direction of the inner wall of the tube, so that the outer wall of the tube rests against one side of the base plate.

Abstract: The present invention provides a mounting arrangement for a device for scanning and reading coded information on one or more articles. The arrangement comprises a housing in which the scanning equipment is arranged and which is provided on one side with a window for passage of scanning beams. The housing includes a bottom cover for engagement with a base surface or with a foot part via a coupler for pivoting the housing towards and away from the user of the device.

Abstract: A camera pedestal has a cylinder with a tapering cross-section for providing a uniform counterbalancing force using a compressed gas. Telescoping column sections which make up a column assembly have inner relief channels and outer slots for hardened roller strips. A column drive system has a hydraulic actuator to remotely raise the column assembly, and to lock the column assembly into any selected position. The column assembly is eccentrically positioned on its base tank. The pedestal is engageable to a receptacle on a camera dolly with a telescoping steering drive tube interconnecting a steering assembly on the pedestal with a steering system in the dolly.

Abstract: A mobile workstation capable of supporting various types of electrical or diagnostic equipment for use primarily in the health care environment comprising a work surface supported by a pedestal and a base. The base includes casters for easy portability of the workstation. The workstation further includes a height adjustment mechanism and a counterbalance. The counterbalance may be supported from the underside of the top of the work surface of the workstation for counterbalancing the weight of the equipment that may be carried on the work surface so as to provide versatility when adjusting the height of the workstation from a seated position to a standing position with minimal effort from the user.

Abstract: This convertible structural element comprises two link chains (1, 2) which, after assembly, are capable together of assuming the form of a rigid beam. The links (3, 4) of the two chains are provided with antagonistic bearing points (10, 11), the first bearing point (10) of a link of rank n of each chain interacting with a second bearing point (11) of a link of rank n-1 in order to trap fastening elements which the pins (7, 8) of the links of the other chain form, when the element is made rigid. At least some links of at least one of the chains of the structural element exhibit a row of teeth (13) which, together with the teeth of the neighbouring links in the direction of the length of the element, form a continuous toothing extending laterally over the entire length of the element.

Abstract: A vertically adjustable column for supporting a seat of a chair. The column includes an outer guide tube mounted to a support stand, an intermediate telescoping tube slidably positioned with the guide tube and an inner telescoping tube slidably positioned within the intermediate tube. An upper portion of the inner telescoping tube is connected to the seat. A gas spring includes a cylinder mounted within the inner tube, a piston rod extending outwardly from the cylinder and a control pin assembly mounted to an upper portion of the cylinder. The piston rod is connected to the guide tube and is extensible between a collapsed position in which the cylinder and inner tube are substantially within the intermediate tube and the intermediate tube is substantially within the guide tube, and a raised position in which a portion of the cylinder and inner tube extend outwardly from the intermediate tube and a portion of the intermediate tube extends outwardly from the outer guide tube.

Abstract: A pneumatic height adjustment column is provided for a chair. The column includes a support tube, a carrier tube, a pneumatic cartridge, a hub fastener, and a shaft fastener. The support tube has a top end which is generally open, and a bottom portion which is adapted to be mounted to a chair base. The bottom portion has an opening with a smaller diameter than that of the support tube. The carrier tube has a top portion adapted to be mounted to a support housing for a chair seat. The top portion has an opening with a smaller diameter than that of the carrier tube. The carrier tube also has a generally open bottom end which telescopically engages the top end of the support tube. The pneumatic cartridge has a cylinder positioned within the carrier tube, a shaft, and a hub. The cylinder has a diameter greater than that of the opening in the carrier tube. The shaft extends downwardly from the cylinder and has a bottom end which passes through the opening in the bottom of the support tube.

Abstract: A chair having a base adapted for support on a floor, a seat-back arrangement for accommodating an occupant, and an upright telescopic height adjustable pedestal assembly connected vertically between the base and the seat-back arrangement for supporting the latter and permitting the height thereof to be vertically adjusted. The height adjustable pedestal assembly include a first height adjusting mechanism having a predetermined vertical stroke defined between upper and lower stroke limiting positions for permitting the height of the seat-back arrangement to be adjusted to any position along said stroke; and a second height adjusting mechanism defining at least upper and lower vertically-spaced range positions for permitting the vertical length of the pedestal assembly to be respectively increased and decreased, whereby the seat-back arrangement can be subjected to the predetermined vertical stroke of the first height adjustment mechanism when in either of the upper and lower range positions.

Abstract: A pneumatic cylinder for use in a pneumatic lever-lift chair, including a cylindrical casing having an inward bottom flange and a plurality of vertically spaced inside annular flanges, a stop plate mounted inside the cylindrical casing and having a plurality of raised portions at the bottom respectively welded to the inward bottom flange of the cylindrical casing by a spot welding machine, and an inner barrel mounted inside the cylindrical casing and having an outward top flange stopped above the top end of the cylindrical casing and a plurality of vertically spaced annular grooves around the periphery respectively forced into engagement with the inside annular flanges of the cylindrical casing.

Abstract: A ground engagable gun support apparatus comprising a main elongated tube and an adjustable elongated tube slidably attached to the main elongated tube by a pair of stabilizing bars and securing means and adjustable vertically and rotatably about the main elongated tube with a butt support tray at the lower end of the elongated tube and a generally "Y" shaped barrel support bracket attached at the upper end of the adjustable elongated tube to receive and support the butt and barrel of the gun respectively, and a strap affixed to the main elongated tube for carrying and camouflage coloring of the invention providing for the non-detectibility by game when employed by the user in the field or safety coloring for visibility in the field.

Abstract: A basketball goal support including a base, a ballast tank and an adjustable pole. The ballast tank is formed as a hollow structure for receiving a fluid such as water to provide ballasting weight to the base. The ballast tank is removably attached to the base to facilitate filling and emptying of the ballast tank as well as transportation of the base. The pole includes upper and lower tubes and an elastomeric ring extending around the upper tube. The elastomeric ring may be positioned at a substantially infinite number of locations along the upper tube to thereby define the position of the upper tube relative to the lower tube.

Abstract: A longitudinally adjustable gas spring has a housing of which the edge on the side where the piston rod exits, projects freely. With the housing being moved as far as possible into an upright tube of a longitudinally adjustable column, the edge can at least in part overlap a damping member located on the piston rod, and with the housing being extracted as far as possible from the upright tube, it can serve additionally as a guidance in a guide bush of the upright tube.

Abstract: A portable electric fan including a plurality of posts connectable to form an elongated pole having first and second ends; a pedestal attached to the first end of the pole and adapted to provide support thereof on a base surface; and a clamp attached to the second end of the pole and adapted for clamping engagement with an upper surface spaced from the base surface. Also included is an adjustment mechanism for adjusting the length of the pole and a blower retained by the pole.

Abstract: In a body 2 mounted on a side of a fluid pressure cylinder 50 where a rod is projecting, a shoe holder 10 provided with a brake shoe 11 for firmly holding a rod 51 from an outer periphery and for locking it is incorporated, and an eccentric cam means 18 for reducing the brake shoe 11 in diameter is mounted via the shoe holder 10, and a brake cylinder means 4 for driving the eccentric cam means 18 is further provided.

Abstract: A support assembly for process control equipment includes a cabinet containing processing equipment. A vertical support pole is supported on said cabinet through a collar for extension and retraction. Process control equipment such as electronic control equipment and a video monitor is mounted on the upper end of the pole. At least one, and preferably two, constant force springs biased into a fully coiled position are attached at one end to the lower end of the pole. The opposite end of the springs are mounted for free rotation on a spool which is secured to the cabinet, whereby raising and lowering of the process control equipment is facilitated.

Abstract: A pool cover support consisting of a base, vertical member and support member. The base has a bottom, with vertical dividers rising perpendicularly therefrom. The vertical dividers form a plurality of cavities in which weights are placed to anchor the base to the pool floor. The base also has a vertical tube which is slightly larger than the vertical member disposed therein. Atop the vertical member is disposed the support member, which supports the pool cover above the water level of the pool. The height of the pool cover support can be adjusted either at the base or the support member, so that the invention may be used in a variety of swimming pools or tubs having different depths.

Abstract: A telescopic adjustable height apparatus designed to adjust the height of tabletops comprises a pair of slidably engaged columns, a multiple-step groove, and a hand wheel locking mechanism to secure the tabletop at the desired height. The column system includes an inner column, connected at one end to a tabletop and an outer column, connected at one end to a base structure. The inner column defines the vertical multiple-step groove. The outer column possesses a bore in one wall of the column through which the hand wheel fastener passes, and this bore maintains the position of the hand wheel locking mechanism. A first detent is located at the base of a first step and provides a first seat for the hand wheel locking mechanism. A second detent is located at the base of a second step and provides a second seat for the hand wheel locking mechanism. The hand wheel locking mechanism comprises a pin with a connection end shaped to be removably received within a detent, a bearing collar, and a hand wheel.

Abstract: An adjustment mechanism for adjusting the height of a chair seat, table top or the relative position of other items includes an outer support tube and a telescoping, column tube subassembly. The column tube subassembly includes an inner support tube, a cylinder and a piston and piston rod subassembly. The piston rod is connected to the piston at one end and to the outer support tube at the other end. An elastomeric sleeve surrounds the cylinder. A valve controls flow of hydraulic fluid from the interior of the cylinder to and from an expandable chamber defined by the elastomeric sleeve. The piston snap-fits onto the piston rod and allows rotation of the column tube subassembly with respect to the outer support tube. A shock-absorbing element is disposed in the cylinder.

Abstract: A column unit, in particular a chair column unit, including a base tube (310) and a pneumatic spring (318), further comprises an axially movable guide bushing (314) which is inserted in an axially movable manner in the upper end (310b) of the base tube (310), and which encloses an axially movable part (318b) of the pneumatic spring (318). An exit movement of the guide bushing (314) can be effected, e.g., by driver- or pusher-stops (326, 314g). The exit movement is restricted by pullout-restricting stops (316, 312g) which are releasable for the disassembly of the column unit.

Abstract: A guide sleeve for a length-adjustable column for chairs is provided with an outside to be received and supported in a guide tube of the column. The guide sleeve is further provided with an internal surface, on which guide webs are formed which project towards a central longitudinal axis. The guide webs are separated from each other by recesses. On the guide webs, there are partial cylinder surfaces concentric of the axis and which are formed as guide surfaces for the housing of a length-adjustable element.

Abstract: A longitudinally adjustable column for chairs, tables or the like comprises an upright tube and a length-adjusting element arranged in the upright tube. For fastening to a pedestal a sleeve-like cone section is provided, which is provided on its internal side with at least one recess, with which engages a projection. Over the length of the upright tube several of such projections are provided at a distance from each other, so that the cone section formed by half shells or being simply slotted can be fixed in different height positions on the upright tube in the direction of the axis.

Abstract: According to an illustrative example, a gas spring (8) is provided within a base tube (9) of a chair column. The piston rod (8-2) of the gas spring (8) is axially supported on a bottom (22) of the base tube (9). The cylinder (8-1) of the gas spring (8) is axially and rotatably guided within a guide (1) at the upper end of the base tube (9). The guide (1) comprises a main sleeve body (2) and a guiding sleeve body (3a) inserted into a central passage of the main sleeve body (2). These sleeves are provided on their surfaces facing each other with at least one projection, and/or at least one recess which engage each other in a snap fit.

Abstract: The invention relates to a height-adjustable support device, in particular for the seat (12) of a chair (10), having a base (14) and an upright tube (16) disposed on the base vertically along a center axis (11) thereof, in which a height-adjustment element (18), preferably a gas spring, is arranged so as to be rotatably and/or vertically displaceably guided by a guide surface (34c) disposed concentrically to the center axis and so as to be supported on a support (28) in the lower end section of the upright tube (16). The guide surface (34c) and the support (28) are integrally-formed with the upright tube (16) itself, and the upright tube (16) and the base (14) are made in one-piece of a plastic material.

Abstract: The invention is a readily adjustable work station. The invention includes a manual or machine driven linkage for adjusting the vertical position of a work station top surface in a level manner. This linkage includes rack and gear sets associated with movable supporting columns that support the work station top surface and a rotational transfer means that ensures that rotational energy from a driving means is evenly imparted to the rack and gear sets. Alternatively, the mechanical linkage may comprise ball plunger screws rather than rack and gear sets.The invention also includes an apparatus for manually adjusting the angular orientation of the work station top surface, and an apparatus for adjusting the clearance between the stationary support structure and the movable support structure.

Abstract: A guide sleeve for a length-adjustable column for chairs is provided with an outside to be received and supported in a guide tube of the column. The guide sleeve is further provided with an internal surface, on which guide webs are formed which project towards a central longitudinal axis. The guide webs are separated from each other by recesses. On the guide webs, there are partial cylinder surfaces concentric of the axis and which are formed as guide surfaces for the housing of a length-adjustable element.

Abstract: A pair of rigid hollow tubular members are telescoped together with one of the members having a series of spaced-apart grooves running parallel to the axis and the other having a series of spaced-apart ribs running parallel to its axis with the ribs slidably engaged in the grooves and means for releasably applying radial force between the two tubular members to force the ribs and the grooves into tight engagement to frictionally lock the tubular members together in a very stable fashion so they support a load without wobbling yet can be released when necessary.

Abstract: An extendible multi-frame stand includes at least three frames arranged in a telescoping relationship, having a single coherent alignment and locking mechanism which includes alignment means for preventing relative rotation between the first and second frames, alignment means for preventing relative rotation between the second and third frames, means for locking the second and third frames at the limits of their longitudinal extension positions, and cam-operated releasable locking means for controlling extension and retraction of the second and third frames relative to each other and to the first frame.

Abstract: According to an illustrative example of the invention, a chair column comprises a base tube with a support plate. A gas spring is accommodated within the base tube. The piston rod of the gas spring is supported on the base tube by a ball bearing. The cylinder of the gas spring is guided at the upper end of the base tube by a guiding sleeve. The guiding sleeve is telescopical with respect to the base tube in response to outward and inward movement of the cylinder with respect to the base tube such that a full satisfactory guiding function is maintained between the cylinder and the base tube, even when the cylinder is in its uppermost position.

Abstract: A foot stool with improved stability is infinitely adjustable and has an actuating mechanism including a ring actuator which is mounted below a spoked base to be actuated by a person setting on the stool. The ring actuator extends concentrically around the spoked base and around a vertically adjustable column which supports a seat above the floor. The ring actuator is accessible from virtually any position around the stool. Rocking the ring actuator downwardly actuates a lifting mechanism coaxially mounted within the vertically adjustable column, and the weight of the person on the seat may be used to raise and lower the stool height. Since the ring actuator is mounted below the base and close to the floor surface, the person on the stool does not have to substantially lift a leg or shift its weight to actuate the lifting mechanism.

Abstract: An adjustable snow making tower including a vertical support pole anchored into the ground and having a support pipe coaxially received over this support pole for support of a snow tower for axial horizontal rotation on the support pole. A support arm is pivotally connected intermediate its opposite ends adjacent the upper end of this support pipe for pivotal movement substantially from horizontal to vertical. An elongated pipe snow making tower having air and water discharge nozzles at its upper end and air and water supply connections at its lower end, is supported adjacent its lower end to this support arm for pivotal movement therewith in a vertical plane. A lock mechanism is provided for temporary locking the support arm in any preselected vertical position between horizontal and vertical and a drive mechanism is also provided to assist in vertically raising or lowering the snow pipe tower together with a support arm about the support arm pivot.

Abstract: An improved craft stand for securing craft frames and craft materials thereto comprising a base and having an upright telescoping standard secured thereto. The telescoping standard including a lower hollow member and an upper telescoping member. The standard further includes a tensioning assembly for securing the upper telescoping member in a desired extended position with respect to the lower hollow member. A universal joint assembly is mounted on an upper end of the standard. A cross arm is connected at its middle to the universal joint assembly and includes opposite ends. A pair of clamp assemblies are attached to the cross arm at its opposite ends. The clamp assemblies are adapted for securing a craft type frame or other items to be worked on by a craft practitioner. Adapter blocks are provided which are securable to the clamp assemblies such that a portion of the adapter block extends above the clamp assemblies.

Abstract: A shoring post comprises a support post slidingly engaging a telescoping sleeve member and a screw device for incrementally adjusting the length of the shoring post. The telescoping member having a plurality of pairs of diametrically opposed holes spaced therealong. A pin member for inserting through a pair of the diametrically opposed holes of the telescoping member to releasably extend the shoring post. A quick release washer for quickly reducing an overall length of the shoring post. The washer comprising a ring portion having a pair of diametrically opposed cam lobes. The lobes having an inclined surface, a cradling surface and a stop. The washer is mounted between the pin and the support post. The washer has a load transfer position wherein the pin is cradled between the cradling surface and the stop surface and a quick release position whereby as the washer is rotated relative to the pin, the pin travels along the inclined surface reducing the overall length of the shoring post.

Abstract: A pillar intended to form part of a furniture support, particularly of a seat, and composed of a sliding tube whose frustoconical top end is intended to be engaged with a force fit, by its top part, in a matching frustoconical cavity in the top part of the piece of furniture, and which slides in a support tube fastened to a foot of the piece of furniture. The sliding tube holds captive, with radial clearance, the body of a gas spring whose piston rod is fixed to the bottom of the support tube. A metal reinforcement sleeve is engaged with a force fit inside the frustoconical end part. Its bottom edge serves as a support surface for the top edge of the gas spring body. It is advantageously composed of a split bush carrying a tongue which secures against rotation a pushrod interposed between the locking control finger and an actuating lever.

Abstract: An elevating mechanism for chairs, tables or the like has a guide tube for a gas spring. The guide tube has a bottom plate with an opening. In its section penetrating through the bottom plate the piston rod is provided with a necking on which a retaining ring is arranged.

Abstract: A valve device for permitting a fluid to flow in two opposite directions at different rates includes an orifice body confining a flow passage. The orifice body has one end defining a valve seat. A valve member is swingingly mounted to the housing to move toward and away from the valve seat. The valve member has a hole with a cross-section smaller than that of the flow passage whereby the flow of the fluid is large when the valve member moves away from the valve seat and is small when the valve member moves toward and seats against the valve seat.

Abstract: A chair having a base, a seat support member, a seat, and a height adjustable mechanism is disclosed. The height adjustable mechanism includes a vertically extendable and compressible gas spring having a pin located at the upper end of the spring. The pin operates a valve integrated in the gas spring so that the effective length of the spring is adjustable when the pin is depressed. An elongated actuating rod is mounted to the seat support member transversely of the gas spring. A lever is pivotably mounted to the seat support member between the actuating rod and the pin. The lever is pivotable to and between a first position where the pin is depressed for adjustment of the height of the seat and a second position where the pin is not depressed. Upon rotation of the actuating rod, the pin is depressed and thereby vertically moves the seat relative to the base.

Abstract: A temporary sign support stand that is mountable to a concrete barrier in a manner that affords high resistance to toppling from high winds or wind turbulence caused by vehicles passing close by. The support stand comprises an inverted U-shape saddle and a support on the saddle for supporting a post for a sign or other member. The width of the saddle is adjustable to accommodate different widths of concrete barriers and provision is made for anchoring the legs of the saddle to respective sides of the concrete barrier, thereby to securely hold the support stand to the concrete barrier.

Abstract: An adjustment mechanism for adjusting the height of a chair seat, table top or other item includes telescoping outer, intermediate and inner tubes. The outer tube is attached to a base. The inner tube is attached to a chair seat or other load. A drive extends the telescoping tubes to adjust the height of the load. In one form, the drive includes a flexible, substantially nonelastic tape having an end fixed to the inner tube and an end fixed to the outer tube. The tape engages or rides over a sheave supported on the intermediate tube. In another form, the drive includes a pair of racks and a pinion. A piston cylinder actuator is disposed within the inner tube. The actuator includes an extensible rod which causes relative movement between the inner and intermediate tubes and extension of the intermediate tube relative to the base through the drive tape or rack and pinion.

Abstract: A two-way actuator device having a lever with a handle portion near a first end and a bearing portion near a second, opposing end for applying force to a responsive device. Two pivots are provided on the lever and located on opposing sides of the bearing portion. The pivots are biased so that the bearing portion moves in a direction opposite to the handle portion when the handle portion is moved in a first direction and the bearing portion moves in the same direction as a handle portion when the handle portion is moved in a second direction, opposite to the first direction.

Abstract: A powered transfer and transport system is provided to permit disabled individuals increased mobility and freedom of movement. The powered system performs as a wheelchair in one configuration and as a bed in another, and provides powered mechanisms for variously positioning the seating surface which are operable by the occupant from the seating surface. The powered system includes mechanisms for laterally shifting, elevating, rotating, reclining and driving the seating surface. Enhanced mobility and freedom of movement for the individual results, improving the capability for independent living and expanding employment opportunities.

Abstract: A longitudinally adjustable gas spring has a valve having a valve pin arranged to be moved within a valve body. On both sides of the inner chamber of the valve body annular seals are arranged and bear against the cylindrical sections of different diameters. To bridge at least one annular seal grooves are formed in an associated cylindrical section. When the corresponding annular seal is bridged by a displacement of the valve pin, the respective annular seal remains in its position bearing against the cylindrical external surface of the corresponding cylindrical section, so that the wear of the seals implying the gas spring to become unserviceable is eliminated.

Abstract: A chair column comprises a stand tube. A support bush is inserted into the upper end portion of the stand tube. A gas spring cylinder extends axially through the receiver bush. The piston rod is directed downward and is connected with a bottom of the stand tube. The gas spring cylinder is guided through two axially spaced bearing bushes. The bearing bushes are radially supported by the receiver bush through a radially prestressed transmission ring or a plurality of circumferentially distributed buffers. The radial prestress is transmitted to the contact face between the bearing bushes and the gas spring cylinder.

Abstract: Provided is a support assembly for mounting an array of photovoltaic panels to a support surface such as the ground. According to the invention, there is provided a plurality of front and rear support posts, each post having an anchor portion to be driven into the support surface and a leg portion which is nested therein and longitudinally adjustable to raise or lower corresponding front and rear horizontal supports. Photovoltaic panels are mounted lengthwise across the horizontal supports in a predetermined position to minimize the stress thereon caused by wind load. The horizontal supports further comprise wiring raceways to support wiring harnesses originating from the photovoltaic panels and terminating at the end of each row of photovoltaic panels in the array.

Abstract: An adjustable height support column comprises a base plate and a support plate joined together by an axially adjustable linking mechanism. The linking mechanism includes a first threaded shaft attached to the base plate and a second threaded shaft attached to the support plate, where the two shafts are hollow and can engage each other telescopically. The linking mechanism further includes a bridging mechanism which permits the shafts to translate axially relative to each other while maintaining a fixed relative rotational orientation. A coupling member threadably engages the outside of the shaft so that rotation of the coupling member effects axial translation of the shafts relative to each other.

Abstract: A two-way actuator device having a lever with a handle portion near a first end and a bearing portion near a second, opposing end for applying force to a responsive device. Two pivots are provided on the lever and located on opposing sides of the bearing portion. The pivots are biased so that the bearing portion moves in a direction opposite to the handle portion when the handle portion is moved in a first direction and the bearing portion moves in the same direction as a handle portion when the handle portion is moved in a second direction, opposite to the first direction.