Abstract: A center seat console that moves between a forward position between front seats, an intermediate position, and a rear position between rear seats is disclosed. The seat/console may function as a seat in the rear seat position, or in the intermediate position. In the intermediate position, the seat/console in the seat configuration may advantageously be used to support a child safety seat. The seat/console may also be configured as a console in either the rear seat, intermediate, or front seat positions. The seat/console is provided with an adjustable height support that permits the seat/console to be lowered to fit beneath arm rests assembled to the front seats when it is desired to place the console between the front seats.

Abstract: A vehicle has an area capable of seating ambulatory passengers and alternatively receiving a mobility aid, such as a wheelchair. The area provides tracks for mounting at least two movable seats that can be moved to provide space in the area for the mobility aid. The tracks are provided with track covers that reduce maintenance requirements by preventing entry of debris. One of the seats is configured to move further than the other whereby the spacing between the seats after moving to accommodate a mobility aid is less than the spacing of the seats when used by ambulatory passengers. The seat configured to move further has a longer track cover, but the tracks are laterally spaced to avoid engagement between the track covers of the two seats whereby they can be moved to be spaced from each other by a distance less than the length of either of the track covers.

Abstract: The present invention relates to an adjustable mounting system for a leaning post for a boat having a pair of side-by-side seat posts. The leaning post is provided with a pair of brackets to which hollow cylindrical support posts can be adjustably mounted. The spacing between the support posts can be adjusted to align with the spacing of a pair of conventional hollow cylindrical side-by-side vertical seat posts. A pair of spaced apart parallel slots in the mounting brackets receive bolts that secure the support posts to the mounting bracket and allow the distance between the support posts to be adjusted to align with the distance between the seat posts.

Abstract: A vehicle seat is disclosed which comprises a seat cushion 1, first and second seat backs 2, 3 separated from each other in a vehicle width direction and pivotally supported to the seat cushion 1, a first recliner device 22 for allowing the first seat back 2 to be pivoted in a forward/rearward direction with respect to the seat cushion 1, and a second recliner device 34 for allowing the second seat back 3 to be pivoted in the forward/rearward direction with respect to the seat cushion. The first seat back 2 is provided at a side thereof adjacent the side of the second seat back with a first bracket 21a. The second seat back 2 is provided at a side thereof adjacent the side of the first seat back 2 with a second bracket 31. The seat cushion is provided with a third bracket 11 which is located between the first and second brackets 21a, 31 and rises up from a rear end portion of the seat cushion 1. The first recliner device 22 includes an actuating shaft 23.

Abstract: A motor vehicle seat is provided with a seat back which can be tilted from a substantially upright use position into a substantially horizontal non-use position. The seat back has at least one wing-rest which, in the non-use position of the seat back, can be tilted about a tilting axis extending in seat direction from a lower armrest non-use position into an upper armrest use position for forming an armrest. The wing-rest is preloaded into the armrest use position. A seat arrangement is also provided with such a motor vehicle seat.

Abstract: A motor vehicle seat is provide that includes, but is not limited to a backrest which is pivoted from an essentially upright usage position into an essentially horizontal non-usage position, the backrest having a wing rest which is pivotable in the non-usage position of the backrest from an armrest non-usage position, which is essentially parallel to a middle backrest par of the backrest, around the pivot axis into an armrest usage position to implement an armrest, and having a locking configuration which is lockable in two positions and by which the wing rest is lockable in both the armrest usage position and also the armrest non-usage position.

Abstract: A seat arrangement is provided for a motor vehicle having two outer vehicle seats and a middle vehicle seat disposed between the outer vehicle seats in the transverse direction, which are displaceable independently of one another in the longitudinal direction. The middle vehicle seat has a folding backrest and can be brought from a seat position in which the backrest is aligned substantially upright into an armrest position in which the backrest is aligned substantially horizontally and can be used at least partially as an armrest for at least one of the outer vehicle seats. The middle vehicle seat has a first actuator and a second actuator for displacement of the middle vehicle seat in the longitudinal direction. At the same time, the middle vehicle seat can be displaced in the longitudinal direction by actuating one of the actuators.

Abstract: A seat control device has a first input unit for performing an operation of moving a first seat to a front side or a back side, a first drive control unit for moving the first seat to the front side or the back side based on an output of the first input unit, a second input unit for performing an operation of moving a second seat, positioned behind the first seat, to the front side or the back side, and a second drive control unit for moving the second seat to the front side or the back side based on an output of the second input unit. A control unit is arranged for prohibiting movement of the first seat and the movement of the second seat from being simultaneously carried out when the operation to move the first seat to the back side is performed at the first input unit and the operation to move the second seat to the front side is performed at the second input unit.

Abstract: A seat arrangement is provided that includes, but is not limited to a first and a second vehicle seat, which are disposed adjacent to one another in a seat row and of which the first vehicle seat has a backrest, which can be pivoted from a substantially upright usage position in the seat direction forward into a substantially horizontal non-usage position. The backrest, includes, but is not limited to at least one height-adjustable cushion portion which, in the non-usage position of the backrest, can be moved by means of a four-bar mechanism having four articulation axes from a lower armrest non-usage position into an upper first armrest position to form an armrest for the second vehicle seat. The articulation axes extend transversely to the seat direction and are inclined with respect to a horizontal transverse to the seat direction. In an alternative embodiment, the articulation axes extend in the seat direction in the non-usage position of the backrest.

Abstract: The invention relates to a backseat with a base plate (1) and a corresponding back plate (11) on which one layer (2) ON of foam each or pneumatic cushions covering both plates (1, 11) are arranged. Following pneumatic cushions are placed on said layer (2) and are suitably secured thereto: For every passenger occupying a window seat, one edge cushion (13) each, resting towards outside and towards inside, and one lateral cushion (4, 14) each, resting towards inside, is provided, the latter being impinged upon with tensile forces by tension elements (9, 19) inserted in a tube (8) for the rapid evacuation of air. In the center of the backseat, a planar cushion (5, 15) is located and may also serve as a center shelf. The back plate (11) may be subdivided into two back plates (11a, b) which occupy approximately ? and ? of the width thereof. The pneumatic cushions can be impinged upon with pressure and can be evacuated individually by means of a control.

Abstract: A vehicle seating system including a seating assembly and a first adjustment assembly. The seating assembly has a first seat portion and a second seat portion. The first adjustment assembly is configured to move the first seat portion with respect to the second seat portion between an extended position, wherein the seating assembly has a first width and a gap is defined between the first seat portion and the second seat portion, and a retracted position, wherein the seating assembly has a second width that is smaller than the first width.

Abstract: A seat caddy having at least one rear member suitable to engage a bench. According to one embodiment of the subject matter disclosed herein, typically two bench-engaging members are rotatably attached to the bottom rear of a seat cushion such that when rotated into an engagement position, the bench-engaging members may secure the seat cushion from moving, sliding or rotating away from an optimal bench position. Further, a storage bag may be removably attached to the bottom front of the seat cushion, such that the storage bag hangs from the front of the seat cushion and provides an additional securing force for maintaining the seat caddy position when engaged with a seat.

Abstract: There is disclosed a seating system which may included a left seat and a right seat independently supported by left and right suspensions systems, respectively. The left and right suspension systems may provide independent vertical, lateral, azimuthal, and longitudinal roll motion of the left and right seats.

Abstract: A pair of seat backs are arranged in a vehicle width direction. A pair of floor brackets attach outer end portions of the seat backs in the vehicle width direction to a floor of the vehicle. A pair of center hinge brackets attach inner end portions of the seat backs in the vehicle width direction to the floor. A pair of connecting portions are provided in the center hinge brackets which are adjacent to each other in the vehicle width direction. The seat backs are independently pivotably attached to the floor. The connecting portions are connected with each other.

Abstract: An improved seating apparatus for an aircraft comprising: a seat assembly; and a wedge lock device for securing the seat assembly to the aircraft without any rattle. In the preferred embodiment, the wedge lock device includes: a selectively adjustable force applicator for applying force to a force bearer; a force bearer for transferring force to an aircraft seat track; and a stud connected to the seat assembly. Also in the preferred embodiment, the seat assembly includes a seat leg.

Abstract: A vehicle seat having a seat cushion and a seat back which are movably connected to one another by a vehicle seat support mechanism and which are also movably mounted to a support floor by said vehicle seat support mechanism, said vehicle seat being movable between a normal in-use position and a stowed position, said stowed position being located rearwards from said normal in-use position and said seat back, when said vehicle seat is in its stowed position, being located at a relatively lower height than when said vehicle seat is in said normal in-use position. When the vehicle seat is moved to its stowed position, a seat assembly can be converted from a 3-seater to a 2-seater condition for instance.

Abstract: The invention relates to a movable installation comprising rows of seats. The inventive installation is formed by guides (1) which are housed in the ground and on which the rows of seats (2) are slidably mounted such that they can slide between a position in which they are grouped together and a position in which they are spaced apart. The aforementioned guides (1) define (i) upper extensions which provide a ground leveling reference during the assembly of the installation and (ii) a housing for the insertion of cover plates (10) which are level with the ground.

Abstract: To allow for optimum arrangement of the rows of seats for any individual flight, the distance between rows is adjusted in the longitudinal direction of the passenger plane, optionally according to sections, by storing in a control device an actually desired arrangement of rows, and automatically displacing (via the control device) every row whose position has to be changed to achieve the actually desired arrangement of rows on its fastening rails to the position determined by the actually desired arrangement of rows. In this way, it is possible to provide a passenger plane, preferably prior to landing, with the data of the actual passenger distribution and the resulting optimum arrangement of rows for the next flight so that it can be prepared after landing for the next flight in the shortest possible time.

Abstract: When ingress intention of a passenger who is supposed to sit on a second seat is predicted, a distance between a first seat and the second seat is expanded automatically. Accordingly, taking time for access to the second seat can be avoided, thereby decreasing necessary time for having access and improving accessibility to the second seat. When a full-open mode is selected (Yes in S1); the passenger does not sit on the third-row seat (Yes in S2); the passenger does not sit on the second-row seat (Yes in S3); and a child seat is not installed on the second-row seat (Yes in S4), a second-row seat sliding motor is driven and a first-row seat driving mechanism operates. Accordingly, forward sliding of the second-row seat starts (S5), and a sliding door is driven backward to open fully.

Abstract: A portable seating system having a seat module that is foldable between an upright position and a folded position for storage. Multiple up righted modules are connectable to one another to form a row of seat modules. A method of providing portable seating which can be set up for use and then removed for storage is also provided.

Abstract: A multiple chair workstation especially suitable for barbers, hair stylists, dentists, and the like. The workstation comprises a base having a centrally mounted client chair. A revolving floor surrounds the client chair, and an operator's chair is mounted on the revolving floor. The base has a vacuum system for collection of cut hair and other debris, along with air conditioning and lighting. Controls mounted in proximity to the operator chair permit control of the revolving floor and the vacuum and air conditioning. Both chairs may be vertically adjustable, as controlled from the operator chair. Additional controls may include a reclining back on the client and/or operator chair. Various utilitarian appendages such as footrests, armrests, tool trays, storage boxes and the like may be provided on the chairs.

Abstract: A bench assembly is provided which includes a seat assembly and at least two backrest assemblies. The back assemblies are rotatable from one side of the seat assembly to an opposite side independently of one another such that persons sitting on the seat assembly can be facing in the same direction or in opposite directions.

Abstract: When ingress intention of a passenger who is supposed to sit on a second seat is predicted, a distance between a first seat and the second seat is expanded automatically. Accordingly, taking time for access to the second seat can be avoided, thereby decreasing necessary time for having access and improving accessibility to the second seat. When a full-open mode is selected (Yes in S1); the passenger does not sit on the third-row seat (Yes in S2); the passenger does not sit on the second-row seat (Yes in S3); and a child seat is not installed on the second-row seat (Yes in S4), a second-row seat sliding motor is driven and a first-row seat driving mechanism operates. Accordingly, forward sliding of the second-row seat starts (S5), and a sliding door is driven backward to open fully.

Abstract: The invention relates to a transportable podium (1) with step elements (2) which in an operating position of the podium (1) have different heights above a floor (6). To facilitate the assembly and disassembly of a mobile podium (1) the invention provides for the step elements (2) to be configured such that they can be extended telescopically and to be arranged in a substantially cuboidal support frame (5).

Abstract: A seat assembly for a vehicle that has a rear seat positioned behind the seat assembly. The seat assembly includes a seat bottom that is movable between a seating position and a forward position. In the seating position, the seat bottom is in a generally horizontal position for supporting an occupant seated on the seat assembly. In the forward position the seat bottom is in a generally vertical position such that a rear edge of the seat bottom is positioned above a front edge of said seat bottom. The seat assembly also has a seat back that is movable between a seating position and a second position. In the seating position the seat back is in a generally lateral position relative to the vehicle for supporting an occupant seated on said seat assembly. In the second position the seat back extends longitudinally relative to the vehicle to permit access to a rear seat positioned behind said seat assembly.

Abstract: A system converting seats into couches, characterized in that it comprises—with at least one set of seats (1, 2) comprising at least one base (d) and one backrest (f) connected by a linkage (e) allowing to move said seat into the seating mode, the base and the backrest assuming a first relative angular position or into the couch mode, the base and the backrest then assuming a second relative angular position—a support (3) for said seats, a conversion mechanism driving each linkage of each seat to convert each seat (1, 2) into a couch in such manner that at least two consecutive seats within a column of the set of seats shall be moved from the seating mode one behind the other into the couch mode one above the other.

Abstract: A front seat 2 is divided into a driver seat 2a and a front passenger seat 2b, a second-row seat 3 and a rearmost seat 4 are divided into a first seat 3a, 4a and a second seat 3b, 4b, the front passenger seat 2b and the second seat 4b of the rearmost seat 4 are configured so as to be foldable, and the second seat 3b of the second-row seat 3 is configured so as to be movable to the vicinity of the driver seat 2a and to the vicinity of the first seat 4a of the rearmost seat 4. Therefore, infants seated on the first seats 3a and 4a of the second-row seat 3 and the rearmost seat 4 can easily be taken care of and communicated with. Also, by moving the second seat 3b of the second-row seat to the vicinity of the driver seat 2a, communication with a driver can be provided easily.

Abstract: A seating system (10) having a split bench seat (14, 16, 18) substantially divided in a 30%, 40%, 30% proportion with the 40% center portion (16) being adjustable in the fore/aft direction.

Abstract: A seating arrangement comprising two seats mounted to a single support pole, each seat capable of being rotated about the support pole and stowed independently of the other. The seating arrangement may also include a single seat slidably and rotatably mounted to a support pole.

Abstract: The portable and compact motion simulator (10) comprises of a platform (22), a support base (20), one powered and controlled extensible member (24), and a motion base controller (26). The simulator can be used like a seat cushion that can be placed on a chair or can be part of a chair. The platform (22) is driven by the said extensible member (24) via a motion base controller (26) to effect motion along the single degree-of-freedom in synchronization with audio and visual images. The said motion base controller (26) provides computing resources to operate and control the motion simulator (10), thereby eliminating the need for computing resources external to the motion simulator (10). A dynamics control means (40) optimizes the dynamic performance of the motion base in accordance with the weight of the patron (02). The portable and compact motion simulator (10) is designed to simulate motion for a patron playing an interactive computer game or participating in a virtual reality experience.

Abstract: A convertible first/second-class seat offering a given number N of seating spaces convertible into a second/first-class N-seater seat, provides N seats with N seat cushions and 2N armrests, the first/second-class convertible seat includes a device for translating at least one of the N seat cushions and at least one of the 2N armrests, the N seat cushions and the 2N armrests remaining mutually aligned, translations T obtained by the translation device allowing the seat cushions that are to be translated to be moved further apart when the second-class convertible seat is converted into a first-class seat, or allowing the seat cushions that are to be translated to be moved closer together when the first-class convertible seat is converted into a second-class seat.

Abstract: A second-class two-seater seat (1) that can be converted into a first-class single-seater seat, and vice versa. The second-class two-seater seat comprises two seats (2) two seat cushions (3) and two armrests (4). The two-seater (1) comprises elements (5) for translating at least one of the seat cushions (3) and at least one of the two armrests (4), the seat cushions (3) and the armrests (4) remaining mutually aligned. Translations of the seat cushions and the armrests are obtained by the translation element's (5), allowing the seat cushions that are to be translated and the armrests that are to be translated to be brought closer together when the second-class two-seater seat is converted into a first-class single-seater seat, or the seat cushions that are to be translated and the armrests that are to be translated to be moved further apart when the first-class single-seater seat is converted into a second-class two-seater seat.

Abstract: A seating arrangement comprising two seats mounted to a single support pole, each seat capable of being rotated about the support pole and stowed independently of the other. The seating arrangement may also include a single seat slidably and rotatably mounted to a support pole.

Abstract: A retractable stairs-like stand has rows of seats on moveable floor-bases arranged in a stair-like manner for use in an auditorium or stadium-like application. A variety of seating styles can be accommodated due to the retracted storage position used wherein the steps are shifted to all be in vertical alignment, and the seats are stored in a nested configuration with corresponding seats in vertical alignment to provide a more compact arrangement.

Abstract: A desk that includes a desk top that has a forward book support surface having an equilateral triangle shape that is movable between a raised position and a lowered position about a base of the support surface. The support surface has sides that each form a front side edge of the desk top when the support surface is in the lowered position. A writing surface is attached to the base and has opposite side edges that coincide with a periphery of an imaginary circle that is parallel with the writing surface. The support surface is disposed inside the imaginary circle when the support surface is in the raised position and has a front portion that extends outside the periphery of the imaginary circle when the support surface is in the lowered position.

Abstract: A seat structure for a motor vehicle includes a front seat having a seat back capable of reclining backward, and a rear seat comprising a seat back capable of reclining forward and a seat cushion. In this seat structure, the seat cushion of the rear seat is pivotably supported at a front end, lower portion thereof by a vehicle body through a pivotal support member, such that the seat cushion is rotatable about an axis of the pivotal support member to be flipped over and stored above a floor panel in front of the rear seat. The seat back of the rear seat is pivotably supported at a lower portion by a vehicle body, and is able to recline forward after the seat cushion of the rear seat is rotated and stored, so as to be located in an original position of the seat cushion.

Abstract: The portable and compact motion stimulator (10)comprises of a platform (22), a support base (20), three extensible members (24), and a motion base controller (26). The simulator can be used like a seat cushion that can be placed on a chair or can be a part of a chair. The motion base controller (26) drives the extensible members (24) to produce rotations about the pitch axis (14), roll axis (16), and translation in the heave (18) direction in synchronization with audio and visual images. The motion simulator system can be used interactively with a computer game or in a virtual reality environment. Numerous motion simulators can be linked to a common system controller (12) to provide identical synchronous motions to a plurality of users in a theater application.

Abstract: A seat structure for a motor vehicle includes a front seat having a seat back capable of reclining backward, and a rear seat comprising a seat back capable of reclining forward and a seat cushion. In this seat structure, the seat cushion of the rear seat is pivotably supported at a front end, lower portion thereof by a vehicle body through a pivotal support member, such that the seat cushion is rotatable about an axis of the pivotal support member to be flipped over and stored above a floor panel in front of the rear seat. The seat back of the rear seat is pivotably supported at a lower portion by a vehicle body, and is able to recline forward after the seat cushion of the rear seat is rotated and stored, so as to be located in an original position of the seat cushion.

Abstract: Devices for changing the slope of rows of tiers, whose bearing structures are definitively or temporarily fast, by a single elevating operation. The devices include tiers whose bearing supports are constituted by first long columns and second short columns, which, by actuation of elevating motors are alternately brought in supporting position of the tiers, the first long columns in active supporting position generating a first, more accentuated slope profile for the tiers, the second short columns, brought in active position of the tiers generating a second less accentuated slope profile.

Abstract: A multi-functional bench seat. The bench seat has a base to which one or more seat sections are attached. Each seat section has a complementary support arm also attached to the base. A back section is attached to each support arm. Both the seat section and support arm are capable of being rotated relative to the base. The back section is capable of being rotated relative to the seat support arm. Consequently, the bench seat may be positioned in a number of different positions to serve as either a seat or a support table.

Abstract: A vehicle seat has a coupler for connecting the seat to the floor of a vehicle, and a first seat section. The first seat section is connected to the coupler, and includes a femur portion and a back portion. A second seat section is also connected to the coupler, and includes a femur portion and a back portion. A third seat section is additionally connected to the coupler and includes a femur portion and a back portion. The first and second seat sections are movable between: (1) a first position wherein the femur portion is generally parallel to the vehicle floor and the back portion is generally perpendicular to the vehicle floor; (2) a second position wherein the femur portion and the back portion are both generally parallel to the vehicle floor; and (3) a third position wherein the femur portion and back portion are both disposed generally perpendicular to the vehicle floor.

Abstract: Seating groups for passengers, for example in an aircraft cabin, are equipped with several seats having seat components supported on a support base on which the seat components, especially the seat sections are laterally slideable to make the seats wider when a passenger sits on a seat or narrower when a passenger is not sitting on a seat. The seat widening or narrowing is accomplished in several ways, for example, with the aid of a grooved shaft that operates as a spindle when turned by tilting a seat component, or by springs that vault upwardly when not loaded and spread when a passenger sits on a seat supported by the springs. The grooved shaft can be operated for example by an armrest or a seat section.

Abstract: A passenger seat assembly convertible between a two-seat configuration and a three-seat configuration, including a seat assembly base and first, second and third seats for carrying respective seat bottom and seat back cushions. The first and third seats defining outboard seats are moveable on the seat assembly base and the second seat defines a center seat carried in a fixed position on the seat assembly base. A gear drive is carried by the seat assembly base and interconnects the first and third seats for simultaneous movement relative to each other and to the second seat. The first and third seats move towards each other into the two-seat configuration wherein the first and third seats encroach upon the second seat and define a dead zone between the first and third seat. The first and third seats are moveable away from each other into the three-seat configuration wherein the second seat defines a center seat having the same seating width as the first and third seats.

Abstract: In a motor vehicle rear seat with a divided back rest, the individual back rest parts are connected for pivoting about at least one horizontal pivot axis running horizontally and transversely to the travel direction via an inner hinge arranged in the region of the division plane of the back rest and an outer hinge in the region of the side wall of the motor vehicle on the vehicle body, each hinge having a fastening part on the back rest side and a fastening part on the vehicle body side.

Abstract: A home seating furnishing having one or more power driven adjustable seats, where each seat offers movement independent from all other seats in the furnishing is disclosed. The furnishing includes an armrest lid which is moveable between open and closed positions while remaining horizontal at all times, thereby allowing exposure of the interior of the arm rest.

Abstract: An aircraft passenger seating unit providing seats for two or more passengers abreast which is convertible to provide different widths of seats by moving seat parts laterally with respect to one another between two configurations, wherein the seats are defined by an end armrest (4, 5) at each side of the unit and by a pair of intermediate armrests (6, 7, 8, 9) between the or each pair of adjacent seats and lost-motion devices move the intermediate armrests apart when the unit is moved to the configuration providing wider seats and enable them to be moved together when the unit is moved to the configuration providing narrower seats. The lost-motion devices may be headed rods.

Abstract: A series of vehicle seats, in particular airline passenger seats, which can be adjusted from three seats of normal width to two seats of enlarged width and vice versa, displays a coupling device through which two side parts of the seat back of the middle seat can be connected alternatively with the middle part or the seat backs of both outside seats. The coupling device connects the gear with the hand lever through a telescopically elongatable shaft only in the swinging area of a hand lever used for an adjustment between the middle position and an end position. The elongatable shaft includes a first section equipped with a spline bore hub and a second section that can be shifted axially relative to the first, which is formed on one part of its length like a spline shaft which only meshes with the spline bore hub when the gears connect.

Abstract: A seat comprises a first frame rotatable between a first position where the frame is raised from a floor surface and a second position where said frame is horizontally moved down along the floor surface, and a second frame rotatable between a raise position where the frame is raised from the floor surface and a folding position where the frame is horizontally moved down along the floor surfaces at the back of the first frame. The first and second frames are interlocked each other through arm rest. A seat cushion is rotatably supported on the first frame. A back rest is supported on the second frame to be rotatable in back and forth directions through a pivot shaft. The back rest and the first frame are interlocked each other through a link member. The link member rotates the back rest in a direction where the lower end portion of the back rest is drawn forward when the first frame is rotated to the first position.

Abstract: A modular assembly of theater seats aligned in a row. Each of the seats in the row moves with an identical motion in response to a coordinated sequence to create seat motions which can complement a scene being protrayed on a movie screen. Three or more rotatable shafts run along the row under the seats. The shafts are caused to rotate by hydraulic cylinders coupled to the shafts through bell cranks. Each seat is supported by three legs which are also coupled to the shafts by bell cranks. Rotation of the shafts causes vertical motion of the legs, and by coordinating the motions of the individual legs, in the presently preferred embodiment of the invention, the seats can be made to move with linear vertical motion, or to rotate either side to side or fore and aft in the vertical plane. Linear fore and aft motion of the seats may be provided by a fourth rotatable shaft running along the row under the seats.

Abstract: The device concerns a driving gear for Convertible public transportation seats with variable spacing (2a, 2b, 2c) along a dimensional axis (3), the seats (2a, 2b, 2c) being mounted on a structure (4) with several adjacent seats (2a, 2b, 2c), with each of them separated from the next by a space between frames (5) and sliding on the structure (4) along the dimensional axis (3). A driving gear comprises a worm (6) whose axis (7) is parallel to the dimensional axis (3) and which is coupled with at least one nut (8) attached to the seat (2a, 2b, 2c) to be driven, in such a way that when the worm (6) is forced to rotate in one direction the seat (2a, 2b, 2c) is driven from one extreme position to another and when the worm (6) is forced to rotate in the other direction the seat (2a, 2b, 2c) is driven to move in the opposite direction.