Abstract: The invention is a dowel and joint system for wooden construction and wood joinery. It Provides and easy method to assemble wood furniture making it both easy and light weight. Wood is naturally heavy, by using a method to join pieces of wood that is both simple and light weighted, this method provides a stable structure that is earth friendly (uses less wood) and lightweight. It makes it easy for users to assemble and disassemble real wood or wood imitation furniture.

Abstract: A metal reinforcement fitting for reinforcing a through hole penetrating through a wooden building component from one surface and the other surface thereof includes: a first plate member made of a metal plate, a cylindrical member made of a metal cylinder, and a second plate member made of a metal plate. The first plate member has a through hole adapted to receive a rod-like fastener therethrough, and is adapted to be disposed on the one surface of the wooden building component. The cylindrical member is adapted to receive the rod-like fastener therethrough and to be inserted and fitted in the through hole of the wooden building component so as to extend over an entire length thereof. The second plate member has a through hole adapted to receive the rod-like fastener therethrough, and is adapted to be disposed on the other surface of the wooden building component.

Abstract: A method for joining two objects by anchoring an insert portion provided on one of the objects in an opening provided on the other one of the objects. The anchorage is achieved by liquefaction of a thermoplastic material and interpenetration of the liquefied material and a penetrable material, the two materials being arranged on opposite surfaces of the insert portion and the wall of the opening. Before such liquefaction and interpenetration, an interference fit is established in which such opposite surfaces are pressed against each other, and, for the anchoring, mechanical vibration energy and possibly a shearing force are applied, wherein the shearing force puts a shear stress on the interference fit.

Abstract: A component connection has a first component, which consists of a metal material, a ball likewise consisting of a metal material, which is welded to the first component, and a second component which has a through-hole and a collar which projects from a top side of the second component, is bent upwards and extends circumferentially around the through-hole. The two components are joined to each other such that the ball projecting from the first component projects into the through-hole provided in the second component or even partially through the through-hole. The second component is arranged so that the collar protrudes from the first component. The second component is a sandwich component which has a middle layer of a plastic material, the middle layer being located between an upper metal layer and a lower metal layer.

Abstract: A heat dissipation heat sink having a press-fit hole whose inner peripheral surface is a cast skin surface is included; the heat dissipation heat sink is sandwiched by the press-fit head and the insertion guide by aligning the axis of a rectifying element in an insertion guide with the axis of the press-fit hole and making the press-fit head face the heat dissipation heat sink; a protrusion portion of a load receiving jig is made to face the rectifying element in the insertion guide; and the rectifying element is press-fitted into the press-fit hole of the heat dissipation heat sink by pressing the periphery of the press-fit hole of the heat dissipation heat sink (22,23) by the press-fit head and receiving a load applied to the rectifying element by the protrusion portion of the load receiving jig.

Abstract: A technique for improving the retention force between a connector (10, 11, 12, 13, 14, 15, 16, 17, 100, 101) and a spacer (1) for insulating glass units is disclosed.

Abstract: A cornerlock is used with a frame assembly. The frame assembly includes first and second frame members each having walls defining interior voids. The cornerlock extends into the interior void of each of the first and second frame members. The cornerlock comprises first and second body members mating with the interior voids of the first and second frame members, respectively. Each body member has proximal and distal ends and are rigidly fixed to one another. The first body member has a leg and an arm both extending from the proximal end to the distal end. The leg is resistant to deflection. The arm is deflectable about the proximal end and immediately deflects upon engagement with the first frame member for engaging the leg with one of the plurality of walls and biasing the arm into engagement with another one of the plurality of walls of the first frame member.

Abstract: A drive pod of a watercraft such as a boat may be designed to break off the hull of the boat in the event of an underwater collision involving the drive pod. A shaft assembly that transmits power from the engine in the hull to blades or a jet in the drive pod is designed to break at a precise point so that seals in the hull and seals in the drive pod are protected from damage. The shaft assembly may include an axial blind hole with an undercut at a bottom of the blind hole. A pin may be inserted to reinforce the shaft above the undercut.

Abstract: A bearing device for a wheel has a bearing including an outer race having double-row outer raceway surfaces formed on an inner circumference thereof, a hub wheel and an inner race having double-row inner raceway surfaces formed on an outer circumference thereof so as to be opposed to the outer raceway surfaces, and double-row rolling elements interposed between the inner and outer raceway surfaces. The bearing has a constant velocity universal joint coupled thereto with a screw fastening structure by fitting a stem section of an outer joint member to a shaft hole of the hub wheel, in which the shaft hole of the hub wheel is formed by penetrating the hub wheel into a cylindrical shape over an axial direction of the hub wheel.

Abstract: An elastically averaged alignment system includes a first alignment portion comprising an alignment member and a first plurality of elastically deformable alignment elements. The alignment system also includes a second alignment portion comprising an elastically deformable alignment member configured and disposed to be received by and deformably and matingly engaged with the alignment member and a second plurality of elastically deformable alignment elements configured and disposed to deformably and matingly engage the first plurality of deformable alignment elements, wherein the engagement of the alignment member and deformable member and first plurality of elastically deformable alignment elements and the second plurality of elastically deformable alignment elements elastically average a predetermined position of the second alignment portion relative to the first alignment portion.

Abstract: A handle assembly for a valve system is provided. The handle assembly includes a body defining a cavity, an input shaft at least partially located in the cavity, a handle coupled to the input shaft, and a first gear located in the cavity and coupled to the input shaft. The handle assembly further includes an output shaft at least partially located in the cavity, a second gear coupled to the output shaft and located in the cavity engaging the first gear, and at least one key supported by the body. At least one of the input shaft and the output shaft include a first portion having cross-section that is other than circular, and the first portion selectively engages the at least one key, thereby limiting rotation of the at least one of the input shaft and the output shaft.

Abstract: A fastener includes a circular shaped body having a dish-shaped interior including an inner flat plate integrally connected to and recessed with respect to an outer planar ring. Multiple connecting legs integrally connect the inner flat plate to the outer planar ring. The outer planar ring has a substantially circular perimeter. First and second deflectable wings are each integrally connected to and extend outwardly from the perimeter of the outer planar ring by first and second deflectable arms. The first and second deflectable wings directly contact opposed ones of multiple faces of a socket tool when the fastener is received in a socket cavity of the socket tool.

Abstract: The invention relates to a method for the connection of an upper sheet metal part and a lower sheet metal part of which at least one is formed as an organic sheet metal part with the aid of an auxiliary joining part and an apertured metal washer, wherein the auxiliary joining part has at one end a functional section with an undercut and, at the other end, also a piercing section with a shaft surface and a shaft recess formed therein. The sheet metal parts and the metal washer are brought into a stacked arrangement in such a way that the metal washer contacts the organic sheet metal part. By means of the piercing section slugs are punched out of the stacked sheet metal parts. Either the functional section or the piercing section is passed through an aperture of the metal washer and a pressure is exerted on the metal washer in order to drive washer material into the shaft recess or into the undercut and thereby to join the auxiliary joining part to the metal washer.

Abstract: A serviceable self-retaining elastic arrangement for mated components includes a first component having at least one protrusion having a retaining rib circumferentially extending around an outer surface of the at least one protrusion. Also included is a second component having at least one elastically deformable beam. Further included is at least one aperture defined by the at least one elastically deformable beam, the at least one aperture configured to receive the at least one protrusion therein and having at least one aperture dimension smaller than at least one protrusion dimension, wherein the at least one elastically deformable beam is elastically deformed in an engaged condition of the at least one protrusion with the at least one elastically deformable beam.

Abstract: A aspects of one or more exemplary implementations, disclosed is a plastic tool mount and system with a tool connector head with a back side, nose and distal end of the nose; a shaft guide having a channel is formed within the head open at the distal end of the nose; the channel further having a raised bump section of plastic extending from a wall of the shaft guide into the shaft guide channel; and, wherein the diameter of the shaft guide channel at the location of the raised bump is diminished.

Abstract: In the present invention, a through-hole (2) and a compression periphery part (3a) at which the core of the resin foam (1c) is compressed are provided in a fastening part of a resin-foam core composite plate (1). A cylindrical part (11a) of a metallic fastening member (11) is inserted into the through-hole (2) from the proximal end side of a wall part (4). The fastening member (11) is crimped to the distal end of the wall part (4) via an eyelet member (12) placed on the outside of the wall part (4) so as to forcibly spread the cylindrical part (11a). The fastening member (11) and a counterpart member (A) are fastened together by tightening a nut (14) onto a bolt (13) inserted into the cylindrical part (11a).

Abstract: A system enabling the attachment of an object to an element (1) having attachment groove(s), having at least one grooved surface (2) including at least one attachment groove whose mouth (3) is defined longitudinally by two opposing edges (5) that each include an inner salient angle, the system includes an attachment device (6, 7), the element (1), and elements for coupling (8) with the object. The attachment device includes a clamping assembly and a locking element (7) capable of being at least partially inserted in the groove, directly in any of the attachment points along the latter, the assembly being at least partially resiliently or plastically deformable when exposed to a pressure bias exerted by the locking element in order to form, by deforming the material, an anchoring and clamping element capable of anchoring under the edges (5) and/or against the salient angles.

Abstract: An elastic retaining assembly for matable components includes a first component having a first surface. Also included is a second component configured to be mated with the first component, the second component comprising a second surface. Further included is a receiving feature formed proximate an engagement side of the second component, the receiving feature having a first degree of curvature. Yet further included is an elastically deformable protrusion operatively coupled to, and extending away from, the first component, the elastically deformable protrusion having a second degree of curvature distinct from the first degree of curvature of the receiving feature, wherein the elastically deformable protrusion is formed of an elastically deformable material and configured to elastically deform upon engagement with the receiving feature.

Abstract: An elastic attachment assembly is provided. The elastic attachment assembly includes a first component having a base outer surface. Also included is a plurality of elastically deformable protrusions extending from the base outer surface of the first component. Further included is a second component having a pocket portion configured to receive the first component therein, the pocket portion defined by a base wall and at least one sidewall extending from the base wall. Yet further included is a plurality of receiving structures defined by the base wall of the pocket portion and configured to receive the plurality of elastically deformable protrusions, wherein the plurality of elastically deformable protrusions is configured to elastically deform upon insertion to the plurality of receiving structures.

Abstract: An elastically deformable retaining hook for matable components includes a first component having a body portion extending from a first end to a second end. Also included is a second component extending from a first end to a second end. Further included is a slot disposed in the first end of the second component and defined by a first, second, third, and fourth slot wall. Yet further included is a hook portion disposed proximate the first end of the body portion. The hook portion includes a first segment extending angularly from the body portion. The hook portion also includes a second segment extending angularly from the first segment and configured to fittingly engage the slot of the second component, wherein the second segment is formed of an elastically deformable material and configured to elastically deform upon engagement with the first slot wall and the second slot wall.

Abstract: An elastic clip retaining arrangement includes a first structure having a main portion. Also included is a second structure having a plurality of receiving apertures, wherein the second structure is configured to be mated with the first structure. Further included is a plurality of elastically deformable clips extending from the main portion, each of the plurality of elastically deformable clips comprising a neck portion and a head portion, wherein the plurality of elastically deformable clips is configured to elastically deform proximate the neck portion upon contact with the plurality of receiving apertures.

Abstract: An elastic mating assembly includes a first component comprising a substantially rigid material and an aperture defined by an aperture wall. The assembly also includes an elastically deformable second component having a cutout portion. The elastically deformable second component also includes a second component outer wall removably engaged with the aperture wall, wherein the second component is disposed substantially within the aperture. The elastic mating assembly further includes a third component removably engaged with the cutout portion of the elastically deformable second component, wherein the elastically deformable second component is configured to elastically deform proximate the cutout portion upon contact with an outer surface of the third component.

Abstract: An elastic tubular attachment assembly for mating components is provided. The elastic tubular attachment assembly includes a first component having a first surface. Also included is a second component having a second surface, a third surface, and at least one aperture, wherein the second surface is configured to align and engage with the first surface of the first component. Further included is at least one elastically deformable tubular member operatively coupled to the first component proximate the first surface, the at least one elastically deformable tubular member comprising an outer surface, wherein the at least one elastically deformable tubular member is formed of an elastically deformable material and configured to elastically deform radially inwardly upon contact with at least one aperture wall of the second component.

Abstract: An elastic insert assembly for aligning components to each other includes a first component having a first surface and a second surface. Also included is a second component. Further included is a pocket portion of the second component configured to receive the first component therein, the pocket portion defined by at least one sidewall and a base wall, wherein the at least one sidewall extends from the base wall in an angularly outward direction. Yet further included is at least one elastically deformable perimeter wall of the first component, the at least one elastically deformable perimeter wall tapered inwardly from the first surface to the second surface, the at least one elastically deformable perimeter wall formed of an elastically deformable material to elastically deform at an interface between the at least one elastically deformable perimeter wall and the at least one sidewall.

Abstract: A plastic tool mount and system with a tool connector head with a back side, nose and distal end of the nose; a shaft guide having a channel is formed within the head open at the distal end of the nose; the channel further having a raised bump section of plastic extending from a wall of the shaft guide into the shaft guide channel; and, wherein the diameter of the shaft guide channel at the location of the raised bump is diminished.

Abstract: A connection system comprising an anchor connected to the window frame, a meeting rail having ends that may be snap fit to the anchor, and a single screw to tighten and true-up the connection once it is installed in the anchor. The connection system allows the meeting rail to be removed and replace from inside the building. In an alternative embodiment the disclosure details a kit for detachably securing a meeting rail to a frame jamb. The kit comprises separate anchors that are removably secured to the first and second side of the jamb frame and a profiled pin for insertion into the anchor for securing the meeting rail to the anchor and upon manual rotation of the pin the meeting rail and frame jambs are secured together.

Abstract: An equipment piece includes first and second components, such as a vehicle door armrest and a vehicle door. The first component is insertable in a recess, such as a slot, in the second component. The second component may be secured in the first by deformation of a projecting portion configured as a tab having a wall thickness smaller than its longitudinal extension. The tab is anchorable non-positively in the second component after inserting into the recess.

Abstract: Components such as turbine shafts are maintained coaxial with each other by a coupling ring. The coupling ring includes a body which is cylindrical when unstressed, and which has two arrays of projections each array engaging a respective cylindrical surface of recesses in the components. The body is flexible, and so is resiliently deformed by contact between the projections and the respective cylindrical surface. The projections of the two arrays are angularly out of phase with each other.

Abstract: A jig (40) is used to resiliently deform a locking lance (15) in an unlocking direction by being moved in a direction intersecting with a resilient deforming direction of the locking lance (15) in unlocking the locking lance (15), and includes an unlocking surface (46) which is inclined with respect to both the resilient deforming direction of the locking lance (15) and a moving direction of the jig (40) and pushes and resiliently deforms the locking lance (15) in the unlocking direction in a moving process during an unlocking operation, and a terminal pushing portion (50) which pushes and displaces a terminal fitting (30) in a direction away from the locking lance (15) with respect to the resilient deforming direction of the locking lance (15) in the moving process during the unlocking operation.

Abstract: A mounting device for securing a connector includes a mounting plate and a mounting member. The mounting plate defines an installation slot and a receiving hole. The mounting member includes a protrusion and two legs. Each of the two legs is elastically deformable. The mounting member is slidably received in the installation slot, and the protrusion is engaged in the receiving hole, to prevent the mounting member from moving along a first direction, which is substantially parallel to the mounting plate. The two legs are located on two opposite sides of the mounting plate, to prevent the mounting member from moving along a second direction, which is substantially perpendicular to the mounting plate. The two legs are configured for securing an installation piece of the connector to the mounting plate.

Abstract: A method of producing a load-bearing steel construction connection, wherein a clinch connection (13) connecting a first metal workpiece (6.1, 6.2) with a second metal workpiece (6.3, 6.4) is formed by local deformation by means of a die tool (20) and a counter-tool (30). In that case initially the first metal workpiece (6.1, 6.2) and the second metal workpiece (6.3, 6.4) are placed one on the other on a processing surface of the counter-tool and aligned. The die of the die tool is then advanced and sunk into the two metal workpieces (6.1, 6.2; 6.3, 6.4) placed one on the other until the clinch connection (13) has been formed by plastic deformation. The first metal workpiece (6.1, 6.2) has a first workpiece thickness (t1) and the second metal workpiece (6.3, 6.4) has a second workpiece thickness (t2), which together give a total workpiece thickness (tt) which is thicker than 8 millimeters.

Abstract: A device for the forced locking of two elements oriented orthogonally to one another, especially suitable for steadily connecting and constraining two tubular elements (10), (12) with quadrangular or polygonal section which are partly delimited by a U-shaped band (22) and which have, on at least one face, a plurality of pairs of shaped recesses (14), whereas the band (22) is correspondingly provided with pairs of complementary projections (16) developed projecting on the inner front of the opposite vertical and parallel branches (18) and (20) thereof.

Abstract: A composite structural member is provided. The structural member includes a tubular shaft having a mating region of stiffness, and possibly thickness, greater than another region of said shaft. The shaft defines a lumen, and a fitting is disposed in the lumen. The fitting has a coupling region that defines at least one recessed portion bounded by one or more non-recessed portions, and the mating region mates with the coupling region of said fitting. As such, the shaft and fitting are mechanically restrained from at least some relative movement due to interference of the shaft and the fitting. A sleeve may be coupled to said shaft, for example, by including a tubular inner surface that proximately surrounds at least part of said shaft and mating region, for discouraging expansion of the mating region of said shaft.

Abstract: A metal member coupling structure and a metal member coupling device that can perform high-strength and high-precision coupling are provided. A shaft-like portion of the second metal member is fitted in an annular portion of the first metal member, a restraint ring is disposed on the outer peripheral portion of the annular portion of the first metal member, and the annular portion is pressed to be plastically deformed, whereby the annular portion is made to flow into a coupling groove of the shaft-like portion and the first metal member and the second metal member are coupled to each other through mechanical engagement therebetween.

Abstract: A seat comprising a seat part and a height adjustment mechanism comprising a link having a bore which comprises at least one substantially radial notch, a revolving tube having a fitting portion placed in the bore, said tube externally comprising two axial stops in contact with the link on either sides, at least one of said axial stops consisting of a bead having a stop surface in contact with the link, and a support surface opposite from the stop surface, the fitting portion externally comprising at least one bulge extending into the notch, wherein the bead comprises at least one axial indentation in the support surface, facing the notch, said indentation being adjacent to the bulge.

Abstract: An exemplary connector includes a main body and a block engaged with the main body. The main body includes a central plate, a first extension plate extending downwardly from a lateral side of the central plate, and a second extension plate extending upwardly from an opposite lateral side of the central plate. Two riveting holes are defined through the central plate. The block includes a first securing plate and a second securing plate extending from the first securing plate and attached to the central plate of the main body. Two pins extend from the second securing plate and are punched to be engagingly received in the rivet holes of the central plate to engage with the main body.

Abstract: The railing system comprises at least one elongated rail having a plurality of spaced-apart openings. It also has a plurality of elongated pickets having opposite ends, each picket having at least one end provided with at least two spaced-apart retaining tabs initially extending lengthwise and configured to be inserted through a corresponding one of the openings of the rail. The tabs of the pickets are outwardly bendable to rigidly connect the pickets to the rail. This type of connection can be quickly achieved and lowers the manufacturing costs of railing systems.

Abstract: A deformable connection mechanism includes an insert member, a socket member, a first shell and a second shell defining a through hole. The insert member extends form the first shell. The socket member is formed on the second shell. The insert member includes shaft body and an elastic head. The socket member includes a receiving hole communicating with the through hole and an elastic sidewall surrounding the receiving hole. The elastic head and the sidewall are deformable. The insert member is passable through the receiving hole. The elastic head has a size larger than that of the receiving hole.

Abstract: A load detection device for a vehicle seat mounted between a floor side mounting mechanism and a seat side mounting mechanism and measuring a load applied by an occupant seated on the vehicle seat, includes a shaft member adapted to be fixed to one of the floor side mounting mechanism and the seat side mounting mechanism, a strain generating member fixed to the shaft member and including a hole into which the shaft member is press-fitted, a strain gauge attached to the strain generating member, the shaft member of which surface hardness is specified to be lower than a surface hardness of the hole and including a scraping projecting portion scraped off by means of the hole in a case where the shaft member is press-fitted to the hole, and an inter space formed between the strain generating member and the shaft member and positioned next to the scraping projecting portion.

Abstract: A method of coupling a plurality of parts together includes casting a first part to include a base and a protrusion that protrudes from the base. The first part is made from a metallic material. The method also includes providing a second part with an opening and mating the first and second parts such that the protrusion is received within the opening. Moreover, the method includes deforming the protrusion over the second part such that the second part is retained between the deformed protrusion and the base of the first part.

Abstract: A lightweight heavy duty bushing assembly for use in a vehicle suspension system and being low cost and having a high assembly tolerance is disclosed. A metal bar pin is press fit into a bushing formed from a metal sleeve bonded to an elastomeric housing. The metal sleeve is deformable such that exact tolerances of the metal sleeve and the bar pin are not required. The metal bar pin has extended ends with a hole in each end for attachment of the metal bar pin to vehicle suspension components, mounting brackets, or to the vehicle frame.

Abstract: Technology which enables a first member and a second member to be firmly fastened together is provided. A bar-shaped section is formed on the first member, a hole is formed in the second member, and the bar-shaped section of the first member is pressure fitted into the hole of the second member. Here, peak sections which extend intermittently in the axial direction or peak sections which extend obliquely with respect to the axial direction are formed in a repeating fashion in the circumferential direction, on the side face of the harder of the bar-shaped member and the hole.

Abstract: Alternative designs, materials and manufacturing methods for medical devices. Some embodiments disclosed deal with attachment of an elongated structure, such as a wire or ribbon, or a tubular member, such as a coil, to an elongated member in an elongated device. For example, an elongated core member having defining an outer surface, and an elongated structure including a first portion and a second expanded portion along the length thereof can be provided. An attachment member, such as a centering ring, or the like, is disposed about a portion of the elongated core member and a part of the first portion of the elongated structure. The attachment member defines a lumen and having an inner surface. Part of the first portion of the elongated structure is disposed between the inner surface of the attachment member and the outer surface of the elongated core member.

Abstract: A joining component is joined to a joint component. The joining component includes an insertion hole and two fitting holes. The joint component includes a fusible shaft at a position corresponding to the insertion hole and two protrusions at positions corresponding to the fitting holes. The joining component is placed on the joint component such that the fusible shaft is inserted into the insertion hole, and the protrusions fit into the fitting holes. The fusible shaft is then fused by using ultrasonic vibrations.

Abstract: A window spacer for integrated glass units is disclosed. The window spacer has an elongated housing with two distal ends. The housing is bent upon itself so that the distal ends are adjacent to each other. One end has an engaging slot, and the other end has an engaging member formed in it. When the engaging member is inserted into the engaging slot, a restraining portion of the engaging member prevents the engaging member from disengaging from the engaging slot.

Abstract: A driving wheel bearing apparatus has an inner ring 5 secured to a wheel hub 1 by a caulked portion 13. An outer joint member 14 of a constant velocity universal joint 3 has a shoulder portion 19 and a cylindrical shaft portion. Face splines 19a and 13a are formed at the end faces of the shoulder portion 19 and the caulked portion 13. Face splines 19a and 13a are supported with pressure by a fastening bolt 21 that abuts the outer side end face of the wheel hub 1 and is threadedly connected to an internal thread 20a of the shaft portion 20. Compressive remaining stress is placed on the surfaces of the face splines 19a and 13a as a result of surface modification, by shot peening. The surface hardness is set at 300 Hv or more.

Abstract: A fixing member for fixing a blindfold plate to a support post where a fixing hole is formed, the fixing member includes: a deformation portion that is attached to the blindfold plate, and is inserted in to the fixing hole while being deformed and stays in the fixing hole in a deformed condition when the blindfold plate is fixed to the support post.

Abstract: Apparatus and methods for assembling together separate components, such as a first substantially flat sheet metal component to a second substantially flat sheet metal component, in substantially perpendicular relationship. A first latch component body may have an elongated displaceable latch member provided on a first edge of the first latch component body that is configured to be received and latchably retained within a latch reception opening of a second latch component body that is of complementary shape and dimensions to receive the displaceable latch member.

Abstract: A structure for joining structural members is disclosed. The structure joins an end of a first member to a side of a second member by a coupling insert. The coupling insert has a web coupling portion that is received by the end of the first member and a tenon portion that is received by a transverse opening in the side of the second member. The web coupling portion and the tenon portion are connected by a base plate.

Abstract: Friction-welded connection between a sheet metal element and a therein inserted rotation body. The sheet metal element is provided with a protruding, circular annular wall as a pressure face, which pressure face is adapted to be engaged by the rotation body with a counter-pressure face. At least one pressure face is of such conicity that the insertion of the rotation body loads the annular wall with increasing pressure, there being formed a friction-welded connection between rotation body and annular wall as a result of rotation of the rotation body.