Abstract: A safety harness structure for a rocking chair. The structure includes a support frame and a chair mounting on the support frame through a pair of swinging bars. The swinging bars are pivotally engaged with two sides of the support frame and the chair through pivotal shafts located at the junctures of the support frame and the chair. The chair may swing to and fro relative to the frame about the pivotal shafts which function as fulcrums. The swinging bars are pivotally bridged by a restrictive rod for limiting the swinging angle of the swinging bars thereby to maintain the chair swinging within a selected displacement.

Abstract: A swing assembly includes a support frame unit with lateral frames and a horizontal bar interconnecting the lateral frames, a canopy frame with a pair of lateral rods perpendicular to the horizontal bar, and a pair of adjustable mounting units. Each of the mounting units includes a retaining member secured to the lateral rod, and having a first axle hole and a first end face formed with first engagement teeth around the first axle hole. A stationary seat on the horizontal bar has a second axle hole aligned with the first axle hole, and a second end face confronting the first end face and formed with second engagement teeth around the second axle hole. A pivot axle is secured to the lateral rod, extends through the first and second axle holes, and has a threaded end projecting through the stationary seat and engaging a rotary knob.

Abstract: An apparatus for imparting substantially oscillatory motion to a subject. The apparatus has a support assembly for supporting the subject and an oscillatory mechanism for defining a path of motion of the support assembly, the path having a region of bilateral symmetry with respect to a reference point. An actuator assembly which may be coupled to the oscillatory mechanism enables the subject to control the oscillatory mechanism, as well as to brake and lock the motion of the mechanism. The apparatus may allow for the subject to recline on an articulated support assembly, in which case the equilibrium center of gravity of the support assembly is maintained substantially at the centerpoint of the path of motion regardless of the relative orientation of the articulated segments of the support assembly.

Abstract: The rocking chair includes a ground-resting base, a seat support frame and rocking arms rockably mounting the seat support frame to the base. A seat, defining a front end portion and a rear end portion, is pivotally mounted on the support frame at its front end portion allowing limited up and down movement of its seat rear end portion between an upper position and a lower limit position. A stop is carried by said seat support frame and engages the seat rear end portion in its lower limit position. A spring continuously forces the seat towards said upper position, and the weight of a person seated on the seat rear end portion will effectively lower the seat rear end portion to its lower limit position against the bias of the spring. The rocking chair also includes a unidirectional two part ratchet locking device having a ratchet wheel carried by one of the rocking arms, and a pawl pivotally carried by the seat support frame.

Abstract: The rocking chair comprises a base member, a seat support frame rockably mounted thereon, a seat pivoted at its front end to the support frame for limited up and down movement, the weight of a person seated on the seat lowering the seat to a lower limit position against the bias of a spring, and a two part locking device carried by the base member and by the seat and mutually engageable to lock the chair against rocking when the seat is in its upper position and clearing each other when its lower limit position. Therefore, the chair is automatically locked against rocking when a person leaves the seat.

Abstract: A chair comprises a base, a seat support frame which is longitudinally movable back and forth with respect to said base, and a seat. A lift mechanism mounts the seat on the frame and is capable of lifting said seat from a lowered seating position to a raised position to assist an occupant in exiting from the seat. Locking means is actuatable as the seat is raised to lock the frame against movement with respect to said base. The locking means is released as the seat is lowered to its seating position to free the frame for movement with respect to said base.

Abstract: A rocking mechanism for mounting a piece of furniture, such as a chair, sofa or cradle, on a support arrangement, the rocking mechanism allowing the piece of furniture to rock relative to the support arrangement. The mechanism comprises a unitary front link, a unitary rear link and first and second lower links. The unitary front link has an upper end adapted to be pivotally mounted to the support and a lower end that defines an elongated bottom front bearing member. The unitary rear link has an upper end adapted to be pivotally mounted to the support arrangement and a lower end that defines an elongated bottom rear bearing member. Each of the lower links has a front end and a rear end.

Abstract: The gliding seating unit comprises: a base configured to rest upon an underlying surface; a seat assembly positioned above the base that includes a generally horizontal seat and a pair of side panels connected with and extending downwardly from opposite side edges of the seat; an extendable ottoman including an ottoman panel; gliding means attached between the base and the seat for enabling and controlling gliding movement of the seat relative to the base; and an ottoman-extending mechanism attached to the seat and the ottoman that includes a seat bracket attached to the seat, an ottoman linkage attached to the ottoman, and an actuation linkage pivotally interconnected with the seat bracket and the ottoman linkage. The ottoman linkage is configured to move the ottoman between a retracted position, in which the ottoman panel is generally upright and located below the seat, and an extended position, in which the ottoman panel is generally horizontally disposed and located forward of the seat.

Abstract: A swing assembly includes a support frame, a pair of linking units, a seat unit, and a pair of pivot connecting units. The support frame has upright left and right frame portions adapted to be supported on a ground surface, and a horizontal bar interconnecting the left and right frame portions. The linking units are disposed between the left and right frame portions. Each of the linking units has an upper end connected pivotally to the horizontal bar, and a lower end. The seat unit is disposed between the linking units, and has two lateral arms proximate to the linking units. The pivot connecting units connect the lateral arms of the seat unit to the linking units, respectively.

Abstract: A reclining chair having a base frame (1) supporting a reclining unit (2) by a mechanism having downwardly converging swing links (15 and 16) pivoted at their upper ends at (22 and 23) respectively to the frame, a rigid member (14) pivotally connected to the lower ends of the swing links (15 and 16 at 20 and 21). The rigid member (14) has a link (13) rigidly connected to it which in turn is rigidly connected to the reclining unit (2). The center of gravity of the reclining unit with its occupant is maintained in a substantially horizontal plane as the unit moves from upright to reclined positions.

Abstract: A self-supporting swing structure made of a plastic material is disclosed. The swing includes two support shoulders (11), a horizontal crosspiece (12) for connecting the support shoulders in their upper part, and an oscillating seat (13) hung from suspension supports (14), which are fixed to the crosspiece. Each support shoulder (11) includes two tubular legs (15), which are fixed to one another at the top and to an end of the said crosspiece (12) by a locking bolt (16). The two legs turn downward and are joined at half height by at least one connecting crossbar (17). This connecting crossbar has its ends threaded in tubular joints (15') of the legs, and they are locked there by anti-unthreading tongues (17') and pins (20). In addition, the legs (15) of each shoulder (11) are rigidly connected (32, 114, 131) to an adjacent suspension support (14) of the oscillating seat.

Abstract: A rocking chair has two side panels each of which has an engaging hole and a plurality of positioning holes, a first bar and a second bar connected between the two side panels. A footrest has two side plates pivotally connected to the two side panels by a rod extending through the engaging holes and the side plates, each of the two side plates having a match holes so that the footrest is positioned relative to the two side panels by extending two pins through the positioning holes and the match holes. The two side plates can be rested on the first bar. Each of the two side plates has a notch defined therein so that the footrest can be folded between the two side panels by engaging the second bar with the two notches.

Abstract: A brake assembly to selectively allow or restrict a pivotal movement of a seat frame relative to a base frame in a reclining chair assembly is disclosed. Reclining chair assemblies applicable to the present invention have a back support member and a seat support member of the seat frame which are positionally fixed during usage of the reclining chair assembly. The seat frame moves relative to the base frame at a pivotal axis common to the base frame and the seat frame. The brake assembly attaches to the seat frame and the base frame to provide for control over the pivotal movement therebetween. In a preferred embodiment opposing arm rests of the reclining chair assembly are positionally fixed relative to the base frame. A first embodiment of the brake assembly relies upon an anchoring of positional orientations of an anchor point relative to a pivotal point.

Abstract: A swing with a pivotally attached tray for pivotable movement about a generally vertical axis, a vibrating mechanism attachable to a seat bottom of the swing, wheels mounted on a frame for selective engagement with the floor when the frame is tilted back when grasping a pair of handles on the frame, a lost motion coupling mechanism for a motorized drive mechanism, and a reclinable seat with an adjustment wire for selecting different reclined positions.

Abstract: A rocking chair comprising a rocking mechanism that is concealed in the armrests of the chair. More specifically, each armrest includes an upper surface on which the user can place his arm and sidewalls depending from the upper surface. The sidewalls define between them a cavity of sufficient dimensions to receive the rocking mechanism. The armrests are connected to the back and the seat of the chair, so as to move with those components when a rocking movement is imparted to the chair.

Abstract: A hanging chair is disclosed which includes use of a mesh fabric for a seat and back support portion. Also included in the hanging chair's design is a single fabric panel for a seat and back portion.

Abstract: An improved portable patio swing of the type being suspended from a free-standing, overhead support frame. The patio swing includes a swing seat including a sling cushion that is suspended within a peripheral seat frame including a pair of opposed, S-shaped arm members being interconnected by seat frame cross-members. The sling cushion features a plurality of articulating compartments formed therein which are capable of folding across the width thereof to conform to the back and rear end of the occupant of the swing. The swing seat is suspended within the overhead support means by predetermined lengths of linked chain or other suitable connecting means which position the swing seat at the desired inclination in relation to the supporting frame.

Abstract: A glider-recliner chair that can glide both the upright and reclined positions includes a seat, a base, a footrest, and side panels. The side panels are interconnected with the base via front and rear glide links. The side panels, seat, and footrest are interconnected with a reclining mechanism. The reclining mechanism is configured so that the footrest cushions comprising the footrest are in a stacked vertical relationship when the chair is in the upright position and are positioned so that the upper footrest cushion is positioned between the lower footrest cushion and the seat when the chair is in the reclined position. The mechanism includes front and rear swing links for controlling the movement of the seat relative to the side panels and base and a footrest drive link for driving the footrest to its extended position.

Abstract: A glider chair including an improved glider linkage mechanism having a pair of front and rear glide links which are laterally preloaded such that non-precision bearing may be utilized. The glider chair further includes a rigid "box-like" chair frame surrounding the glider mechanism and having ample clearance therein so that extended glide links may be utilized to further provide a smooth and relatively flat glide motion while maintaining an appropriate height between the seat and floor.

Abstract: An article of furniture comprising:a) a support frame comprising two hollow vertical supports and a horizontal strut connecting the upper end of the first vertical support to the upper end of the second vertical support;b) a bench comprising a horizontal support member, a plurality of arm rests mounted on said support member, a seat back, and a means for pivotably mounting said seat back to said plurality of arm rests; andc) a means for suspending the bench from the horizontal strut;wherein the interior of the vertical supports is accessible through doors provided in the vertical supports.

Abstract: The present invention is a base suspended single swing which includes at least one adjustable safety member for regulating the swinging height profiles. The swing is suspended by a plurality of pivotal suspension members and is supported by a base and a plurality of upright supports. The swing itself is defined by a pivotal swinging base which has a single seat attached off center, a footrest area and a gripping handle and at least one impact member for engaging the safety member. The swing is self-propelled and is intended for use by small children and toddlers. The off center single seat construction allows the swing to be placed in motion easily by a child passenger. The safety member is adjustable such that a parent or the like may regulate the uppermost peak swinging level. The present invention swing may have a generally open support base construction or may have an enclosed construction which simulates a boat, car and the like.

Abstract: A gliding reclining chair has a base, on which a preferably three-position recliner chair mechanism is suspended by two short glider links on each side. The upper and lower pivot joints of the glider links are ball bearing-type joints, for ease of gliding. As the legrest is extended, associated links engage stops provided on the base and glider links for preventing gliding. The handle for thrusting and retracting the legrest interconnects and associates the two side linkages, so that they act in coordination.

Abstract: A seat (3) in a chair (1) is suspended by two swingable links (4, 5) to be swingable with respect to a base (2) with legs (6, 7) and a seat holder (12). The distance or spacing (S2) between lower ends of the two links (4, 5) is changeable or adjustable so that the links extend in parallel to each other or the links extend at an angle to each other, thereby varying a swinging mode of the seat (3). For this purpose the lower ends of the two links (4, 5) are connected to two sliders (21, 22) which are guided and operable to move in directions toward each other or away from each other, respectively.

Abstract: A highly compact, stable mechanism for enabling a chair to perform rocking and gliding movements, and optionally swiveling movement, includes a channel-shaped frame mounting member mounted to a chair frame, and an inverted channel-shaped base mounting member mounted on a base. The mounting members are interconnected by one pair of front and one pair of rear swing arms, and also by a pair of tensioned springs operative for restraining the rocking and gliding movements.

Abstract: A reclining seat of the type characterized by having a seat back which reclines and a seat bottom which elevates, the improvement which comprises linkage means interconnecting the seat back and the seat bottom and providing a ratio of seat back movement to seat bottom movement of greater than 1 to 1. The pivot axis between the seat back and seat bottom resides on a lateral axis extending from one side of the seat to the opposite side of the seat through the anatomical hip joint region of a seat occupant, for permitting the seat back and seat bottom to move relative to each other about the same pivot axis as the seat occupant will move his or her legs relative to the torso.

Abstract: An improved swivel glider chair and support base structure therefor are disclosed. The support base includes channeled leg retaining block members that cooperatively sandwich and retainably grip a plurality of support legs in radially extending manner about a base axis. Base height adjustment is provided by a plurality of spacer blocks that can be selectively incorporated when constructing the base to vary the height of the seat portion of the chair to accommodate the chair user. A full race ball bearing swivel assembly provides increased stability to the assembly.

Abstract: A linkage assembly includes a first link connected at a first point to a translation mechanism attached to a support structure. The translation mechanism is arranged to allow the first point of the first link to translate along a substantially straight axis. A second link is pivotally connected at a first point to the support structure, and at a second point to the first link. A second point of the first link travels on or near an arc of substantially constant finite radius when the first link pivots with respect to the second link.

Abstract: A child seat is provided having an adjustable seat back arranged to pivot relative to a seat bottom between an upright position and a reclined position. The child seat includes a seat shell having a proximal end, a distal end, a seat bottom, and a first pivot axis adjacent to the proximal end and positioned to lie in spaced-apart relation to the seat bottom. A bottom surface of the seat shell includes a nesting surface appended to the proximal end of the seat shell. The nesting surface curves along an arc having a radius that is constant about the first pivot axis. The child seat also includes a seat back shell having a proximal end, a distal end, a seat back, and a second pivot axis adjacent to the distal end and lying in spaced-apart relation to the seat back. A top surface of the seat back shell includes a mating surface appended to the distal end of the seat back shell.

Abstract: A folding swing hammock that has a main rectangular support frame that is held in a generally vertical position by leg members when the hammock is in an unfolded condition. A rectangular seat frame is rotatably supported between two support arms which, in turn, are suspended by springs in the top element of the support frame. A cover is rotatably mounted in the top section of the support frame over the seat frame. The interrelated parts of the hammock are connected together so that they can all be folded into the plane described by the support frame.

Abstract: A rocking chair including a chair body having two parallel stands supported on a base by a linking mechanism, the base including two upright frames and four stretchers connected between the upright frames, the linking mechanism including two symmetrical pairs of links and two stretchers connected between the links, each link having one end pivoted to one stand on the chair body and an opposite end pivoted to one upright-frame of the base, wherein the stretchers of the linking mechanism and base each has two metal female screws embedded at two opposite ends and fixed in place by a respective locating pin and connected to a respective through hole on the upright frames of the base or on the links by a respective screw bolt so that the base and the linking mechanism are detachable.

Abstract: An article, such as a swing arm for a glider chair, includes an elongated structural member made of high strength aluminum, and a pair of cast-in place preassembled bearings located in opposing ends of the structural member and facing in opposite directions. The preassembled bearings each include a first cup-shaped bearing member defining an outer depression for secure engagement by the material of the structural member and an inner ring-shaped ball race or track. The preassembled bearings each further include a second tubular bearing member defining an outer ring-shaped ball race or track and an internal passageway. Ball bearings are positioned between the first and second ring-shaped races for movably supporting the second bearing member on the first bearing member. Lubricant can be added through the passageway in the second bearing member into the area of the ball bearings for lubricating the ball bearings.

Abstract: A highly compact, stable mechanism for enabling a chair to perform rocking and gliding movements, and optionally swiveling movement, includes a channel-shaped frame mounting member mounted to a chair frame, and an inverted channel-shaped base mounting member mounted on a base. The mounting members are interconnected by one pair of front and one pair of rear swing arms.

Abstract: A chair capable of functioning as a highchair, a swing, a doll carrier, a floor feeder and an automobile seat for a child's doll is disclosed. A frame member consisting of two upstanding support members that are interconnected by horizontal cross members is provided. A chair member having a hook member formed therein is removably attachable to the frame in a highchair-like position. A handle member is attached to the seat member for carrying the seat member apart from the frame and for pivotally supporting the seat member from the frame so that the seat may pivot between the upstanding support members in a swinging manner. A tray member may also be attached to the seat member.

Abstract: A seat cushion is disclosed, in particular for an aircraft seat, with a supporting body of a foamed plastic with a spring core embedded therein, and a flameproofing layer of flame-retardant plastics foam, to which a covering material is secured, preferably detachably. The supporting body is formed from a lower supporting part of foamed plastic having the spring core embedded therein and a sitting part, also of foamed plastic, preferably of a different density.

Abstract: A suspension framework for a chair or piece of sleeping furniture, which is able to oscillate, is comprised of a support member 13, 22 which is connected to the sitting or sleeping surface and arranged on both sides thereof, and which is connected with a base support member 1, 26 via rope-type pendulums 5, 6, 11, 24. At least two rope-type pendulums engage the support member on each side thereof. This will enable, in a system having satisfactory stability characteristics, a high degree of sensitivity in response to very minute movements of the human body or under oscillating conditions occurring in the human body that is seemingly at rest.

Abstract: A rocker mechanism for rocking furniture, such as rocking chairs, comprises an elongated tubular casing of rectangular cross-section into which is fixedly mounted a stamped member slidable therein. The stamped member includes an elongated oblong base from which perpendicularly extends a short sidewall along the complete periphery thereof. The stamped member further defines a pair of openings and a pair of curved protrusions at each longitudinal end thereof, whereby ball bearings can be received at each such ends between the sidewall of the stamped member and a respective protrusion thereof. The central opening of each ball bearing lies opposite a respective opening defined in the stamped member. Two holes are defined in an aligned relation in the base wall of the stamped member and in one wall of the casing, whereby a pair of screws engaging respective aligned holes of the stamped member and of the casing ensure that the member is fixedly secured to the casing.

Abstract: A bearing assembly for use with a glider-type furniture piece or the like having a support frame and a carriage member adapted for movement relative to the support frame, the bearing assembly including an inner race member having a recess groove therein and an outer race member having a recess formed therein, roller bearings disposed in an annular raceway defined by the recesses, the inner race member having an upwardly and inwardly bent flange-like edge extending around a major peripheral portion thereof, the outer race member adapted to be frictionally secured beneath the bent edge, and the inner race member having an integral flange like portion adapted to mount a strap-like member for interconnection between the support frame and the carriage member.

Abstract: A swing rocker apparatus adapted for the swingable and rockable attachment of a furniture piece base assembly to an upper portion assembly of the furniture piece whereby the base assembly is in fixed position relative to the surface upon which the base assembly rests. The swing rocker apparatus can be adapted to and attached to most any type of furnitured piece thereby converting it to a rocking or swinging furniture piece without noticeably or appreciably altering the basic appearance and aesthetics thereof. The apparatus comprises hanger members which are arcuately configured and which provide for the interconnection of a base and seat assembly of a furniture piece. The front to back spacing of the top ends of the front and the rear hangers is substantially the same as the front to back spacing of the bottom ends of the front and the rear hangers. There are also hanger stretchers which restrict or substantially eliminate rotation about an axis which is perpendicular to the floor.

Abstract: A chair for an office or the like, having one seat and one back rest which are adjustable especially by body displacement, and having a support (24). The seat has a front seat section (28) and a rear seat section (30) which is connected pivotingly about a first, free-floating seat section about a second pivot axis (32) parallel to the first pivot axis but spaced apart therefrom. The front seat section is on the one hand displaceable by means of at least one supporting element (26) and at least one positive guide (25) along a path established by the positive guide, and on the other hand is suspended on the support for pivoting about a third pivot axis parallel to the first pivot axis but spaced away therefrom.

Abstract: An improved rocker for an infant seat comprising in combination a base having upstanding lateral side walls defining an opening therebetween; an intermediate platform positioned within the opening and having an upper region adapted to receive an infant seat thereon; a pair of generally U-shaped links each having upper portions supported by the side walls, each having a lower horizontal portion adapted to receive a lower region of the platform thereon, and each having intermediate vertical portions coupling the upper and lower portions; drive means coupling the platform and the base for inducing a rocking motion to the platform; adjustment means to longitudinally vary the center of oscillation of the rocking platform; and locking means to lock the platform with respect to the base.

Abstract: A mobile rockable wheelchair having releasable locking means for locking the chair seat thereof in a substantially non-inclined position for exiting from the chair. The means for enabling rocking movement of the chair seat is achieved by a parallel four bar linkage assembly connected between the mobile pedestal, seat and backrest unit of the chair. A releasing lever arrangement is located within convenient reach of the chair's occupant. Adjustable and removable arm rest members are provided mounted on a common support frame for the seat and backrest unit of the chair. The support frame is suitable for mounting a variety of different chair seat and backrest units.

Abstract: A glider support assembly (10, 10') for a chair (12) or other similar article of furniture includes a lower floor base (14, 14'), an upper frame (18) for attaching the chair, suspension links (20) that support the chair frame (18) on the base (14, 14') for forward and rearward gliding movement, and stops (26, 28) preferably on the suspension links and supports (34) of the base in order to position the chair in a reclined position without any latch mechanism. Detachable connections (22, 24) of the suspension links (20) permit the support assembly to be stored, shipped, and sold disassembled in a knockdown fashion. Stops (30, 32) are also provided to limit excessive forward movement of the chair on the support assembly. In one embodiment of the support assembly (10), the supports (34) are constructed as bent metal brackets that project upwardly.

Abstract: A motor-driven baby swing is disclosed capable of swinging an improved baby chair for a prolonged period of time. The chair is usable in a swinging mode of operation, and also in a rigid mode of operation when detached from the swing. The chair is pivotally movable into a plurality of reclining positions in each mode of operation.

Abstract: A glider recliner comprises a recliner linkage mounted atop a glider base adapted to mount the recliner linkage for forward and rearward gliding motion. The recliner linkage comprises a recliner seat link adapted to support a back rest and seat, a recliner base plate and recliner linkage mechanism connected between the recliner seat link and base plate and operable to effect movement of seat and back rest between upright and reclined positions. The recliner linkage also includes a leg rest assembly adapted to move between an extended and retracted position.

Abstract: A rocking chair whose rocking action is achieved solely through a linkage mechanism rather than rocking cams conventionally employed. The chair includes upholstered seat, backrest and armrests which are united in a one-piece structure mounted on a fixed base by means of the linkage mechanism. In the preferred embodiment, the base is provided with a swivel enabling the chair to swivel about a vertical axis. The linkage mechanism allows it to be mounted within the seat frame into a compact space which permits low seat styling and yet, the linkage mechanism is concealed and still functions to provide stable rocking as well as gliding action.

Abstract: A patio swing comprising a seat suspended between right and left upright side supports, the right and left side supports being stably supported on feet members and being rigidly interconnected below the seat by a bridging assembly, the side supports inclining inwardly at their upper ends.

Abstract: An articulated frame hanging chair, the frame of which includes an articulated parallelogram in which the exposed scissoring intersections are shielded and the articulation of the frame is adjustably limited to prevent the center of gravity of the hanging chair from shifting so as to dislodge the user in an unsafe manner.

Abstract: The swing seat assembly includes a back portion adjustably connected to the bottom wall of a seat portion with said portions being molded in one piece with an integral hinge. Said portions having overlapping downwardly curved flanges thereby defining a tunnel on each side of the seat portion. A hanger for suspending the seat from above includes a pair of arms with each arm being connected to said seat portion at each tunnel.

Abstract: A glider is disclosed of durable construction, especially adapted for rugged outdoor use, as for example, on patios, porches and lawns. The glider is of comfortable, portable light weight construction consisting of a minimum number of parts which can be packaged in a relatively small space or container for shipping purposes, and can be quickly and easily assembled by unskilled persons, without the aid of tools, other than conventional or easily available tools such as a screw driver or small wrench. The glider embodies, in its construction, tubular members of simple, easily manufactured design, and wooden members made of readily available sizes of lumber. A feature of the invention is the provision of novel or unique means for supporting the glider on a support frame and constraining the glider to movement in a direction generally parallel to the floor on which the support frame is mounted, as well as the provision of means for reducing wear and noise caused by movement of the glider.

Abstract: A chair for an office or the like, having one seat and one back rest which are adjustable especially by body displacement, and having a support (24). The seat has a front seat section (28) and a rear seat section (30) which is connected pivotingly about a first, free-floating seat section about a second pivot axis (32) parallel to the first pivot axis but spaced apart therefrom. The front seat section is on the one hand displaceable by means of at least one supporting element (26) and at least one positive guide (25) along a path established by the positive guide, and on the other hand is suspended on the support for pivoting about a third pivot axis parallel to the first pivot axis but spaced away therefrom.