Abstract: An arm rest assembly and aircraft passenger seat including the same. The arm rest includes a friction mechanism for resisting abrupt rotational movements of the arm rest. A rotationally fixed frame member defining a rotational axis and receives a rotational member of the arm rest configured to rotate around the rotational axis. A groove formed in an outer circumferential surface of the rotational member seats a O-ring disposed between the groove and an inner circumferential surface of the frame member. Tolerance between the frame member and arm rest is such that the O-ring is held in the groove in a compressed state and frictionally engagement each of the rotational member and the frame member.

Abstract: A rotatable armrest includes: a housing; a button system; and a hinge system engaged to the button system, in which the button system and the hinge system are provided in the housing, in which the hinge system includes a hinge shaft, and the rotatable armrest is fixed at a first position, a second position, or a third position by being rotated about the hinge shaft, and in which the rotatable armrest is configured to be positioned to be folded downward at the first position, the rotatable armrest is configured to be positioned to be directed forward horizontally at the second position, and the rotatable armrest is configured to be positioned to be directed rearward horizontally at the third position.

Abstract: A medical chair with height adjustable armrest comprises a lifting mechanism, a base coupled to a bottom side of the lifting mechanism, a sitting part coupled to an upper side of the lifting mechanism, and a backrest part coupled rotatably to the upper side of the lifting mechanism. An armrest comprises an armrest stop with the armrest rotatably coupled to the backrest part adjustable to an upper position and a bottom position, where, in the bottom position, the armrest stop bears on the first stop coupled to the backrest part, and in the upper position, the armrest stop does not bear on the first stop.

Abstract: An ergonomic chair has a back support member and means for arranging and supporting legs of the user in an asymmetric configuration, with a first leg extending in front of a body of the user and a second leg aligned with or extending behind the body of the user. An angle between the first and second legs in a side view can be at least 30 degrees. The means for arranging and supporting legs can comprise one or more fixed structures that support the first leg in a first orientation, or one or more dynamic structures that can be positioned by the user to support the first leg in a first orientation. In some embodiments, with the legs of the user in the asymmetric configuration, a centerline of the user is offset from a centerline of the back support member with respect to a lateral direction.

Abstract: A pivot fitting has a first lever mounted such that is pivotable out of a starting position about a force-transmitting shaft serving as an axis of rotation in relation to the shaft. The fitting has a clamping mechanism fixing the first lever in different angular positions relative to the shaft. The clamping mechanism has a toothed-ring disc positioned on the shaft and has an outer toothing structure formed on the outer periphery, a catch mounted in a pivotable manner on the first lever and is loaded in the direction of the outer toothing structure and, in a latching position, is in engagement with the outer toothing structure.

Abstract: Disclosed is an armrest for a seat, which is accommodated at a lateral side of a seat cushion at a standby position and adjusted in height with respect to the seat cushion at an operation position. The armrest includes: a base disposed adjacent to the seat cushion; a first module rotatably connected to the base and configured to rotate about a first rotation axis so that a height of the first module with respect to the seat cushion is adjusted; and a second module rotatably connected to the first module and configured to rotate about a second rotation axis traversing the first rotation axis so that the second module is disposed horizontally or vertically with respect to the seat cushion.

Abstract: A vehicle seat assembly includes a seat, a seatback operatively coupled to the seat, and an assist handle located on the seat back, wherein the assist handle is releasable from a stowed position and pivotable outward to a first deployed position and rotatable laterally to a second deployed position. The vehicle seat assembly also includes a release mechanism configured to release the assist handle from at least one of the stowed position and the second deployed position, the release mechanism comprising a bias feature to bias the assist handle towards the first deployed position or the stowed position.

Abstract: An armrest arrangement having an armrest structure supported in a pivotably movable manner relative to a fixed carrier structure and having an inclination adjustment device which has at least one rotationally movably supported adjustment element which can be displaced along a fixed guide path. The armrest arrangement has an actuation device for activating the inclination adjustment device which is operationally connected to a mechanical coupling in order to release or to block the adjustment element for a rotational movement. A mechanical forced control device which switches an activation of the coupling by the actuation device for a limited inclination angle range of the armrest structure relative to the carrier structure without effect is associated with the coupling.

Abstract: An accessory for a vehicle has a base and a pivot part that can be pivoted relative to the base in opposite first and second pivoting direction between first and second end positions. A first latch and a second latch can lock the pivoting movement of the pivot part in at least one of the directions. An actuator automatically and/or manually moves the latches between a latched position in which the first latch and the second latch engaged and a released position in which the latches disengaged. One of the latches has a rotatable wheel rotatable having first blocking surfaces. The base or the pivot part has a first teeth engaging second teeth of the wheel. The other latch is provided with second blocking surfaces that engage the first blocking surfaces in the latched position and disengage therefrom in the released position.

Abstract: A mobile body is configured to travel an area optionally over a surface inside an aircraft cabin. Components comprise at least one of a UVC protective shield, the shield selectively providing a multisided enclosure that selectively envelopes and/or separates the operator from the UVC in the surrounding environment. A source of UV radiation is mounted to the mobile body and configured to direct UV radiation to the surface at a predetermined dosage. At least two articulated arms are mounted to the mobile body, and UV lamps mounted respectively on the arms. The mobile body is a trolley or cart for negotiating an area optionally an aircraft aisle.

Abstract: The present disclosure relates to an armrest for a set of seats of a motor vehicle, the armrest comprising an internal frame, a first insert, and a second insert, the internal frame comprising a first side and a second side, wherein the first insert comprises a first surface, at least one hole, and at least one first lug, and the second insert comprises a second surface, at least one hole, and at least one second lug, wherein the first side and the second side of the internal frame each comprise at least one protuberance, the at least one protuberance being shaped for insertion into the at least one hole of the first insert or into the at least one hole of the second insert.

Abstract: A mechanism for raising and lowering an armrest for a seat includes an armrest, a rotatable hub, and an actuating linkage between the armrest and the hub, the rotatable hub having a cam that operates the actuating linkage to raise the armrest wherein the cam can rotate through a first angle of rotation where the actuating linkage is not operated a second angle of rotation where the actuating linkage is operated. The cam can rotate through a third angle of rotation where the actuating linkage is not operated, this angle being different to the first angle of rotation. The cam is torsionally linked to the rotation of a seat member.

Abstract: An armrest release mechanism includes a pivot bush. A release bracket is fixed to the pivot bush. An armrest pivot is supported on the pivot bush for relative rotational movement. A release board is also supported on the pivot bush for relative rotational movement. The release board is movable between a locked position and an unlocked position. An armrest lock is attached to the release bracket for relative movement. The armrest lock is also attached to the release board. When the release board is in the locked position the armrest lock is engaged with the armrest pivot to prevent movement of the armrest pivot relative to the pivot bush. When the release board is in the unlocked position the armrest lock is not engaged with the armrest pivot.

Abstract: An armrest assembly mounted on a console of a vehicle may include a console main body provided with a storage box in which a space is formed and installed between a driver seat and a passenger seat of a vehicle, an armrest pivotably installed in the storage box and configured to support an arm of a passenger in the vehicle and open and close an upper portion of the storage box, a button member installed in the console main body and configured to be operated by the passenger to unlock the armrest, an operating unit configured to lock or unlock the armrest from the console main body according to whether the button member is operated, and a console cover configured to cover a portion in which the button member and the operating unit are installed in the console main body and expose an upper end of the button member.

Abstract: An armrest assembly for a passenger seat includes a moveable arm including a proximal end and a distal end, a stowed configuration wherein the moveable arm is disposed adjacent and approximately parallel to a seatback of the passenger seat, and a deployed configuration wherein the moveable arm is approximately parallel to a seat pan of the passenger seat. The moveable arm may include a first portion and a second portion. The armrest assembly may include a first rotation axis such that the moveable arm pivots about the first rotation axis when moving between the stowed configuration and the deployed configuration. The armrest assembly may include a second rotation axis such that the second portion pivots about the second rotation axis relative to the first portion.

Abstract: A hinge assembly includes: a body; a first arm pivotally mounted on the body and movable between a first position and a second position, the first arm including a plurality of teeth formed thereon; a pawl mounted on the body proximate to a portion of the first arm, the pawl shaped to releasably engage the plurality of teeth of the first arm. In a collapsed position of the hinge assembly the pawl is disengaged from the plurality of teeth of the first arm such that the first arm is pivotable relative to the pawl. In a deployed position the pawl engages the plurality of teeth of the first arm to releasably secure the first arm in the second position.

Abstract: Armrest (10) comprising a base (19) and an arm (13) that can be moved by a mount (17) between at least one use position and a non-use position, wherein the arm (13) is movable by the mount (17) axially of a pivot axis (a) between a proximal and a distal position, and is pivotable about the pivot axis (a) between a primary and a secondary position, wherein the armrest (10) has an actuator (30) comprising a motor drive having a drive part (29) that is movable between a first and a second position in order to displace the arm (13) in a first direction (y1) between the non-use position and the use position, at least in part, wherein the actuator (30) has at least one spring (21) that can be tensioned upon movement of the drive part (29) or an additional drive part (29) of the actuator (30), wherein the arm (13) can be moved axially, in a second direction (y2) by the spring (21), which second direction is directed opposite the first direction (y1).

Abstract: A seating arrangement includes a base, a lower shell including a first portion coupled to the base and comprising a substantially horizontal portion, a curved transition portion and a backrest portion, a pair of laterally spaced front links extending upwardly from a forward portion of the first portion, a rear link extending upwardly from a rearward portion of the first portion of the lower shell and forwardly of the transition region of the lower shell, and an upper shell comprising a seating portion coupled to the pair of front links and to the rear link, a curved transition portion spaced apart from the curved transition portion of the lower shell and defining an open lateral pass through therebetween, and a backrest portion connected to the backrest portion of the lower shell.

Abstract: An externally replaceable friction mechanism for a pivoting assembly such as an armrest assembly, the friction mechanism including a first spacer configured to non-rotationally engage a fixed element and frictionally engage a pivoting element pivotable relative to the fixed element, a first friction ring configured to non-rotationally engage the first spacer, the first friction ring including fingers configured to frictionally engage the pivoting element, and wherein the first friction ring is configured to permit pivoting movement of the pivoting element relative to the fixed element and provide friction against the pivoting movement.

Abstract: An armrest of a seat for a vehicle includes a first armrest that is movable between a storage position where the first armrest constitutes a part of a seating surface of a seat back and a use position where the first armrest abuts against and is supported on a seating surface of a seat cushion, a rear end portion of the first armrest in the use position being connected to a lower portion of the seat back to be rotatable forward and backward about a first rotation axis extending in a lateral direction of the seat, and a second armrest that is connected to the first armrest to be interlocked with the first armrest, is close to a rear side of the first armrest in the storage position, and is separated upward from the first armrest in the use position.

Abstract: An armrest according to the technology described herein includes a bracket, an armrest body, a device connecting port, an armrest-side connector, and a cable. The bracket is fixed to a seat frame. The armrest body is attached to the bracket to be rotatable. The device connecting port is exposed through an outer surface of the armrest body. The armrest-side connector is fixed to the seat frame at a position different from the bracket. The cable includes an end connected to the device connecting port and an end connected to an armrest-side connector. The armrest body includes a cable retaining portion through which the cable is passed and in which the cable is retained. Any one of the bracket and the armrest body includes a hole (an elongated hole) that allows movement of the cable along with rotation of the armrest body.

Abstract: A device for locking a pivotal protective device, such as a safety bracket or a weather protection hood, of a chair for a chairlift. The device has interacting projections, one of which is connected to a frame of the chair and the other of which is connected to the protective device. At least one of the projections is resiliently mounted, and the projections are equipped with sliding surfaces which produce a deformation of the resilient bracket after a defined force has been applied to the safety bracket and allow the projections to slide past one another in both directions.

Abstract: A seating assembly includes a seat and a seatback pivotally coupled with the seat. The seatback includes a seatback carrier formed from expanded polypropylene. The seatback carrier includes first and second side walls and an upper wall that together define a lower opening. A metallic support member is molded within the seatback carrier. The metallic support member includes an upper portion extending below the upper wall between the first and second side walls. The metallic support member also includes a lower portion extending across the lower opening. A cushion assembly is disposed on the seatback carrier.

Abstract: An electric vehicle includes a front frame (1), a rear frame (2), and a sliding seat (3). The front frame has a first gear set (14). A movable rotation shaft (15) connects the front frame and the rear frame. The rear frame has a track (21). A sliding support (22) is mounted on the track and connects a linear driver (23) which connects a connecting member (25) which connects a connecting shaft (26) which connects the front frame. A wheel support (27) connects the rear frame and an auxiliary wheel (28) and has a second gear set (29) meshing with the first gear set. A linkage (4) connects the rear frame and support rack (31). A link unit (41) connects the linkage and the sliding support. The sliding seat is mounted on a seat support (33) which is mounted on the support rack.

Abstract: An assembly includes a seat and an armrest moveable relative to the seat. A first arm and a second arm each include a first hinge and a second hinge. The first hinges are spaced from each other and fixed relative to the seat. The second hinges are spaced from each other and fixed relative to the armrest.

Abstract: A retaining member has annular inner and outer circumferential portions, a connection portion, engagement projections, a slit, a grip portion, a first inclined surface, and a second inclined surface. The engagement projections projects from a shaft-facing surface of the inner circumferential surface. The slit is formed in the inner circumferential portion. The grip portion projects outward in the radial direction from an outer rim of the outer circumferential portion. The first inclined surface is formed at an upstream-side end part of the grip portion with respect to a direction of fitting to the shaft to be inclined outward in the radial direction from upstream side to downstream side in the fitting direction. The second inclined surface is formed at a downstream-side end part of the grip portion to be inclined outward in the radial direction from downstream side to upstream side in the fitting direction.

Abstract: The present disclosure describes, in an armrest capable of being displaced between a stored position and a deployed position, a vehicular seat capable of preventing foreign matter from entering the interior thereof through a gap formed between the armrest (in particular, the vicinity of the center of displacement thereof) and a mounted portion. The present disclosure relates to a vehicular seat provided with an armrest. Both ends of a first shaft are pivotably supported by first holes formed in a plurality of guide members, and both ends of a second shaft are inserted into second holes to be movable along the holes. Between a side surface side of the armrest and the guide members, a plate member which covers at least a part of the second holes is provided.

Abstract: A hinge and armrest assembly is provided with a stationary portion and a reclining portion. The stationary portion is affixed to a seat bottom and the reclining portion is affixed to a seat back. A link is coupled to the fixed portion on one end and a rotating cage on the opposite end. The rotating cage is located and overlays an armrest receiving portion on the reclining portion. An armrest has a pin that extends through the armrest receiving portion and rotating cage. As the reclining portion rotates with respect to the stationary portion, the rotating cage rotates to maintain the angle of the armrest to the fixed portion.

Abstract: A lock device for keeping a cover of an armrest console at a full open position comprises a rotation arm having an arm body attached to the cover including a fixed portion and an end. The rotation arm is pivotably connected to a console body of the armrest console, and a detent is disposed at the end of the rotation arm. The detent is configured to be inserted into a slot in a rear wall of the console body when the cover is moved to the full open position and released from the slot when the cover is moved away from the full open position.

Abstract: Ramp mounts may facilitate the movement of a passenger seat pan relative to a passenger seat frame during movement of the seat pan between an upright position and a recline position relative to the passenger seat frame. During cycling of the seat pan from the recline position to the upright position, ramp mounts may break. Embodiments of the ramp mount disclosed herein may increase the ramp mount durability so as to reduce the instances of ramp mounts breaking during cycling of the seat pan between the recline and upright positions. Additionally, some embodiments may provide for a ramp mount that has fewer components. Such embodiments may simplify coupling of the ramp mount to a seat pan and may reduce passenger seat system assembly time. Moreover, in some embodiments, the reduced number of components may further reduce manufacturing time and/or costs—thereby providing a relatively low cost ramp mount.

Abstract: In a seat in which an armrest is attached to a side frame of a seatback, a reinforcing member that inhibits lateral torsion deformation of the side frame at a location where the armrest is attached to the side frame when a lateral load is applied to the armrest, is cross-linked between the side frame and a lower panel arranged in a different location than the side frame.

Abstract: The present disclosure provides an armrest-locking device that is disposed in an armrest that is stowed in an armrest case of a rear seatback. The armrest-locking device includes: a locking member disposed at any one of the armrest case and the armrest; a locking bracket rotatably coupled to the other one of the armrest case and the armrest, the locking member inserted into a groove formed on a peripheral portion of the locking bracket when the armrest is stowed; and a holding bracket. In particular, the locking bracket rotates in a forward direction to be fastened to the locking member when the locking member is inserted; and the holding bracket has an end to engage with the locking bracket when the locking bracket is rotated, maintaining the rotation state of the locking bracket.

Abstract: A patient support apparatus including a seat section, a backrest section that is movable relative to the seat section, and an arm supported relative to the seat section. The arm is adapted to move between a first position adjacent the seat section for use as an arm rest for a person sitting on the patient support apparatus to a raised second position adjacent the backrest section. The arm and the backrest section are coupled together when the arm is in the raised second position wherein the arm moves with the backrest section.

Abstract: A seat assembly includes a seatback, an elongated member, a pyrotechnic device, and a wire. The seat assembly may be in a vehicle. The elongated member is rotatably supported by the seatback. The pyrotechnic device is fixed relative to the seatback. The wire is connected to the elongated member and deployably attached to the pyrotechnic device.

Abstract: The invention relates to a motor-vehicle accessory, comprising a first part and at least one second part pivotal about an axis (a) relative to the first part in at least one bearing assembly (20a, 20b), and the bearing assembly (20a, 20b) comprises a bearing pin (14) on which a bearing sleeve (22) is coaxial to the bearing axis (a), and the bearing pin (14) forms a head (19) with an axial retaining face (30). The particularity is that of the bearing pin (14) having first coupling formation that engages in a second coupling formation of the bearing sleeve (22) and prevents relative rotation in a pivot direction (u1, u2) between the bearing sleeve (22) and the bearing pin (14).

Abstract: An armrest device for an aircraft seat has a cushion unit, which is at least substantially implemented by an elastomer and which is provided at least for forming an elastic substrate for an arm support for a passenger. The cushion unit has a comfort structure, which is provided for adjustment of an elastic deformability of the cushion unit.

Abstract: The present invention is a simplified pawl and sector adjustable armrest device. Both the pawl and sector have a toothed edge, which engage one another in the locked position. The locked position prevents the armrest from rotating. A pawl-return torsional spring maintains engagement between the pawl and sector. A release cable can disengage the pawl from the sector, unlocking the adjustable armrest, allowing it to rotate in either position. A protrusion from the sector limits the rotation by butting up against a built-in stop.

Abstract: An armrest of a vehicle seat or a seat bench includes an arm support attached to a console element. A bearing arrangement enables swivel movement of the arm support between a support element of the arm support and the console element. In a preferred embodiment, the bearing arrangement is formed by at least three sliding bearings which are disposed so as to be distributed across the width of the armrest and which, in turn, are formed by the console element and the support element, which are made of a plastic material.

Abstract: A seating portion includes a support structure (10); a tipping seating portion (2), movably connected to the support structure to move between an open position and a closed position. At least one movable armrest (31, 32) is movably connected to the support structure to move between an open position and a closed position. A rotation device moves the seating portion from the open position to the closed position. The armrest (31, 32) is kinematically connected to the seating portion so that the armrest is moved from the position of use to the position of non-use by the movement of the seating portion from the position of use to that of non-use.

Abstract: Armrest device having an armrest part swivellably movable between an armrest position and a not-in-use position, having a base part arranged fixed in the vehicle and on which the armrest part is mounted swivellably movable about a swivel axis, and having a locking device for supporting the armrest part in at least one swivel position relative to the base part. The swivel axis is axially split into a base axis section and an armrest axis section, and the locking device includes a wrap spring brake which interacts with the base axis section and the armrest axis section in order to release the armrest part during a swivel movement in the direction of the not-in-use position and to lock it during a reverse swivel movement.

Abstract: To provide a core for armrest, the core including a stopper pin for restricting rotation, and exhibiting higher resistance to loads. A core for armrest includes a framed body being made of resin, a stopper pin being made of metal, the stopper pin being subjected to insert molding in the framed body so as to protrude a leading-end side thereof toward an outer side of the framed body, and being hooked onto a stopper of a seat, thereby being restricted from rotating, and a rib being integrally molded onto the framed body inside the framed body, and being disposed so as to overlap with respect to a base-end face of the stopper pin in an axial direction of the stopper pin.

Abstract: A seating device is provided have collapsible armrests. The collapsible armrests are attached to the seating device via brackets that hold the collapsible armest in a secure erect position while allowing the collapsible armrests to be rotated into a collapse position for access to the seating device. The armrests are externally attached on both side of the seating device and remain attached in both the erect and collapsed positions.

Abstract: A rear-seat armrest locking apparatus includes a release lever installed in an armrest to generate a pulling force, a link guide connected with the release lever through a release cable to provide a pulling force, and installed inside the armrest to move up and down, a link connected with the link guide to turn an up-and-down linear movement to a lateral movement, a locking pin connected with the link to laterally move by means of the pulling force transferred from the link, and being released from a locking hole of a side fixing plate, and a spring installed on the locking pin to return the locking pin to an original position of the locking pin and insert the locking pin into the locking hole. The rear-seat armrest locking apparatus prevents the armrest from being unfolded forward in a forward collision, thereby preventing an accident.

Abstract: An adjustable armrest includes a housing with opposite walls. Each of the walls has a bore formed in it. The boxes support a pivot pin with a gear so that the armrest is pivotable on the pin. A ratchet with a pawl is pivotably connected to and carried by the armrest. The ratchet is also configured so that the pawl may engage the gear to define incremental ratcheting movement of the armrest on the pin when the armrest is pivoted in one direction. There is also provided a cam ring selectively movable with the armrest for rotational engagement with the gear. The cam ring has an exterior cam surface that contacts a portion of the ratchet and pivots the ratchet clear of engagement with the gear when the armrest is pivoted in another direction. The new armrest incorporates fewer components lowering cost of production, improving torsion force and load bearing capabilities, improving life of the furniture piece and strengthening armrest and furniture piece assembly.

Abstract: Described are arm rest stop assemblies including an arm rest pivotally coupled to a fixed portion of a passenger seat and a down-stop mechanism comprising an adjustment pin inserted through the fixed portion of the passenger seat and an adjustment fastener coupled to the adjustment pin and the fixed portion of the passenger seat, wherein the location of the adjustment pin does not present a pinch point for passengers when the arm rest is lowered to the deployed position.

Abstract: Multiple convertible furniture configurations adapted to provide multiple seating surfaces by interchangeable and removable support cushion units inclusive in a single furniture element. Removably self-supporting cushion seat assemblies are selectively secured to a primary furniture element as auxiliary arms and back surfaces, each of which has internally deployable support legs allowing cushion seat assemblies to be used independently wherein combination with the original chair sofa support unit increasing the number of seating surfaces and arrangement possible.

Abstract: In one aspect, the subject embodiments are directed to a seat that includes a seat bottom and a seat back, wherein the seat back is pivotable with respect to the seat bottom about one or more pivots. A linkage assembly is employed that is coupled to each of the one or more pivots. The linkage assembly includes a linking component that has a first location mounted to the seat bottom and a second location mounted to the seat back. A cam is coupled to the seat back location, wherein a dowel is permanently affixed to the cam. An end distal from the cam, a pin extends perpendicularly from the dowel and is angled at between 20 and 70 degrees upward from a plane formed by an arm channel.

Abstract: An aircraft seat assembly including multiple seats together having a total seating area. The aircraft seat assembly also includes an armrest separating a first seat of the multiple seats from a second seat of the multiple seats and a sliding mechanism coupled to the armrest. The sliding mechanism enables movement of the armrest to change a portion of the total seating area that is associated with at least one seat of the multiple seats. The aircraft seat assembly also includes a controller that controls movement of the armrest responsive to a control command.

Abstract: A center armrest supporting structure for mounting an arm support can be swiveled between a lower use position and an upper rest position for use in a vehicle. Here, the carrying structure as an element of the vehicle features a left and a right console part made of a metal sheet, which have the arm support mounted thereon via bolt sections. Here, each console part on the side facing toward the arm support features a bearing shell made of plastics, wherein the bearing shell can be mounted on the console part by an assembly movement which is directed at least partially in parallel to the swivel axis.

Abstract: The invention relates to an arm rest arrangement for a seat, in particular for a vehicle seat, with an arm rest which is pivotably connected by means of a bearing axis to an arm rest support, wherein a latching and adjusting device is provided for setting an angle of inclination between the arm rest and the arm rest support in a usage position and for folding down the arm rest from the usage position into a non-usage position, wherein the latching and adjusting device is mounted so as to be rotatable in a rotary element within a housing of the armrest and the latching and adjusting device is mounted so as to be rotatable about its longitudinal axis (L) in the housing for setting of the angle of inclination.