Abstract: A portable bathing apparatus comprising a body length container having an inflatable wall which forms a shallow tub for holding water for bathing a person, the wall has a valve for inflating the wall from a source of air, the container is provided with a rigid bottom portion with a fluid egress means including a control valve for draining water from the container and removable apertured cushion means resting on its bottom portion.

Abstract: A convertible sofa includes a rectangular supporting frame provided with a supporting feet resting on the floor and with rigid vertical perimeter structures forming the back and arms, two pairs of rectilinear guides parallel to each other and carrying the arms on the traverse sides, between each pair of slides are mounted free-running rollers with horizontal axes capable of supporting and guiding a respective bar-shaped member which is freely slidable between the pairs parallel guides and which are integral at their front ends with a longitudinal bar provided with supporting wheels resting on the floor so as to enable two stable positions, one of which corresponds to a single bed position.

Abstract: An improved seat-bed extender assembly for a convertible seat-bed. The assembly includes an attachable platform and corresponding linkage to allow conversion to a full-sized bed in conjunctive relation with a convertible seat and for operation of the platform independently of the seat.

Abstract: The described invention allows a do-it-yourselfer to customize a headboard to coordinate with a purchased comforter simply, quickly and inexpensively. To accomplish this, a groove is provided along the back-side of the headboard, inwardly from its outer edge, and over which a matching fabric to the comforter is stretched taut; a flexible tubing is then fit over the fabric to snugly force it into the groove, where it is further held in place by a pair of added, overlapping legs which extend to secure the headboard to the bed frame. The fabric can be easily changed at a later date, merely by unscrewing the securing legs and pulling up on the tubing in freeing the fabric from the groove.

Abstract: A waterbed mattress including an elongated top sheet having head and foot ends, a bottom sheet, and sidewalls defining a fluid-tight receptacle. The top sheet includes a plurality of elongated depressions and riser portions formed therein and arranged to impart extensibility to the top sheet. The depressions and riser portions are arranged in a non-uniform distribution across the surface of the top sheet so that the extensibility of the top sheet varies at different positions therealong.

Abstract: A mattress liner to substantially cover a mattress surface, the mattress liner including a mattress pad having a top surface and a bottom surface, and a plurality of substantially thin magnets releasably disposed in pockets substantially spaced apart relation from one another along the bottom surface of the mattress pad and secured thereto.

Abstract: A hospital bed has a movably supported part, a selectively actuable drive arrangement for moving the part, a manually actuable control switch, and a control circuit coupled to the switch and drive arrangement. The control circuit includes a microprocessor having an input coupled to the control switch and having an output, and the program executed by the microprocessor selectively actuates the output of the microprocessor based on a function which takes into account the current state of a signal being applied to the microprocessor input. The control circuit also includes a further arrangement which actuates the drive arrangement when the signals from the control switch and microprocessor are both actuated, and which deactuates the drive arrangement when either of these two signals is deactuated.

Abstract: This invention provides for a fluid cushion (10) defined by a fluid tight closed housing (22) which is deformable by applied load of a user (12). The fluid cushion (10) includes an upper surface member (24), a lower surface member (26) and an intermediate membrane (64) which divides the interior of the housing (22) into a first fluid medium containing chamber (62) and a second fluid medium containing chamber (60). A tubular mechanism (42) defines through passages (46) which are positionally located for insertion therein of particular bones of the human body. The tubular mechanism (42) has tubular sidewall members (50) which are contoured to provide an apex (52) at a substantially central location between the upper surface member (24) and the lower surface member (26) and allows for maintenance of the fluid mediums (21 and 20) within spaces (48) between openings (32 and 34).

Abstract: A manual support apparatus attachable to a bedframe for providing a secure and stable method for a user/patient to transfer into and out of bed independently, and enhance in-bed mobility. The manual support apparatus has two primary parts: a planar plate member and two tubular members. The plate member has outside edges for alignment with a bedframe's end and side rails. The tubular have internal bores for slidable receipt of a support tube, and is attached to the plate member by suitable means. The plate member is attached to the bedframe's end and side rail by suitable means.In another embodiment of the invention, the manual support apparatus includes a planar plate member having outside edges and at least one support tube attached directly to the plate member. Alternatively, the manual support apparatus can have a unitary construction, including a planar plate portion having outside edges and at least one support tube portion.

Abstract: A web of textile material which is to be permeated with a liquid is caused to move upwardly through the nip of two squeezing rolls which serve to expel air and/or moisture and are immediately adjacent a liquid bath. The freshly squeezed increments of the web act not unlike sponges and thus accept substantial quantities of liquid, and the surplus of liquid is expelled from the web by two rolls which are installed above the bath and define a nip of variable width. If necessary, the web can be contacted by a suitable wetting agent on its way toward the nip of the squeezing rolls.

Abstract: The invention concerns a method and apparatus for dyeing textiles wherein simultaneously the surfaces of these textiles are mechanically processed in such manner that wear shall appear and that the fabric softens, making it possible to minimize energy and material expenditures on one hand and ecological stress on the other.For that purpose the invention provides that the textiles in the form of finished pieces or yard goods are stressed in-line by the bristles of brushes through which simultaneously a dye liquor with a very low proportion of dye of the order of magnitude of approximately 0.01 to 0.05 g/liter is deposited on the textile pieces.

Abstract: In a process for dosing detergent compositions, which either are in the form of pastes or gels, or render such compositions when they are brought into contact with water, into a washing machine, the detergent composition is transported from a container for holding the composition to the washing machine via a conduit, whereafter said conduit is purged by means of a pressurized gas, preferably steam or air.

Abstract: A bridge construction system includes a first independent longitudinal truss positioned over a first bridge span, a second independent longitudinal truss positioned over a second bridge span, a gantry movably mounted on said trusses, the gantry having a first leg mounted to the first truss and a second leg mounted to the second truss, the gantry being drivable along the first and second trusses, a gantry drive for controllably driving the gantry along the trusses, a transverse trolley movably mounted on the gantry, the trolley being drivable along the gantry in a direction generally transverse to the longitudinal trusses, the trolley including a winch for lifting and carrying bridge components to be positioned along the bridge spans over which the longitudinal trusses are mounted, the trolley being selectively positionable over each of the bridge spans, and supports for mounting the longitudinal trusses to bridge components disposed along each of the bridge spans.

Abstract: An apparatus for operating a dock leveler including a linkage pivotably connected at a first end to the base plate. The second end of the linkage is adapted to selectively engage the center plate at times when the center plate is pivoted from its forward position toward its rearward position. Preferably, the second end of the linkage includes a roller apparatus to roll along the underside of the center plate during the pivoting operation. A lever tube is rigidly connected to the second end of the linkage and is adapted to hold an operating lever. The operating lever is in a substantially vertical orientation at times when the center plate is in the stored and bridging positions. When the center plate is in the retracted position, the operating lever is adapted to be in a position that is easily reachable by the operator with only a minimal degree of bending required.

Abstract: A windshield cleaning system with a washing system includes a washing liquid pipe non-rotatably fixed in a bore of a wiper shaft, the end of which washing liquid pipe is inserted into a pot-like connecting piece protected against twisting. Thereby the connecting piece is bracelessly centered with respect to the end of the washing liquid pipe so that it can also make a possible wobbling movement of the end in radial direction. Thus a long lifetime of the connecting point between the rotating end of the washing liquid pipe and the non-rotatable connecting piece is achieved.

Abstract: A drying apparatus (10) for a vehicle washing system maintains blower air bags (18) a predetermined distance from the vehicle without contacting same providing forced air against the vehicle. Ultrasonic sensor (66) are provided on front and back sides of the nozzle (26) for sensing objects within a predetermined distance in combination with control circuitry. The control circuitry controls a motor (42) to retract a cord (36) to in turn raise or move out of the path of the vehicle, the air bag (18) maintaining the predetermined distance from the vehicle. The signals from each of the sensors (66) are each combined to control the motor. The sensors (66) include a housing for supporting same with apertures therethrough for transmissions and reception of ultrasonic signals. The housing includes sawtooth projections extending between the apertures to block transmissions from direct reception by the receiver.

Abstract: A backpack power blower apparatus including a frame carrying an engine and a blower. The frame is provided with a sound insulating planar member for reducing noises produced by the engine and the blower, the sound insulating planar member including opposite side portions extending rearwardly from a front portion of the frame and a rear portion extending between the opposite side portions at rear end portions thereof whereby the sound insulating planar member surrounds a machine body, including the engine and the blower, at least at opposite sides and a rear side of the machine body.

Abstract: The invention constitutes a gutter cleaning system which includes a canister type vacuum cleaner with tubular wand sections with a nozzle adapted to be inserted into a gutter to remove debris therein. The nozzle carries an optical viewing system such as a fiber optic device or a television camera enabling the operator to observe the cleaning operation as it is performed.

Abstract: A door hinge includes a hydraulic retarding device for cushioning the closing action of a door. The hydraulic retarding device has a cylinder body which confines a fluid operating space to receive hydraulic fluid therein. The fluid operating space includes a pair of longitudinally extending cylindrical spaces and an intermediate longitudinal passage provided between and communicating the cylindrical spaces. A vane unit is provided in each of the cylindrical spaces and has a blade which defines a longitudinal clearance with an inner surface of the cylinder body. A baffle extends longitudinally into each of the cylindrical spaces and is disposed between the passage and a respective one of the vane units. The baffles are substantially arc-shaped in cross-section and face away from each other. A gate valve is provided in the passage between the baffles.

Abstract: A device for slidably and pivotably connecting a window regulator arm to a door inner panel includes, a molded plastic slide channel mounted in a slot provided in the door inner panel. The slot defined by spaced apart walls of the door inner panel and extends along the path of desired movement of the window regulator arm. The molded plastic slide channel has a base adapted to engage against the door inner panel and a pair of spaced apart channel walls projecting from the base and through the slot in the door inner panel. The channel walls snap fit against the walls of the slot to retain the slide channel on the door inner panel. The spaced apart channel walls cooperate to define a guide slot therebetween. A slide member is carried by the window regulator arm and slidably engages with the guide channel to enable pivoting and sliding of the regulator arm along the door inner panel.

Abstract: A tool handle cover includes a sheet having a pair of opposing slots formed therein which are juxtaposed to form an opening through which the shaft of a hook implement will project as the sheet is wrapped around the handle thereof.

Abstract: A hinge device comprising a shaft, a coil spring, a shaft holder, and a bracket. The coil spring has a coiled portion wound around the main portion of the shaft. The shaft holder is secured to a first member and holds one end of the shaft, thus preventing the shaft from rotating. The bracket supports both end portions of the shaft, and is secured to a second member. The bracket, therefore, allows the first and second members to rotate relative to each other around the shaft. The main portion of the shaft has a cross section having a short diameter and a long diameter. The coiled portion is formed of a plurality of turns contacting one another. Each turn extends at a predetermined pitch angle to a line which extends at right angles to the axis of the shaft. The turn therefore looks elliptical when viewed in the axial direction, and has a short diameter greater than that of the main portion of said shaft, and a long diameter substantially equal to that of the main portion of said shaft.

Abstract: The invention relates to a hinge housing in the form of a cup which can be sunk in a mortise in the back of the door of a piece of furniture and which has a cup portion made of metal from whose upper margin a mounting flange projects integrally in the position properly mounted on a door and overlaps areas of the inside of the door adjoining the mortise in the door, and whose margin is curved toward the inside of the door, so that in the mounting flange there is formed a shallow recess open on the inside of the door, and having a socket plate of plastic disposed between the mounting flange and the inside of the door, which can be releasably joined to the mounting flange and the door.

Abstract: A hinge arm for a vehicle includes a tubular member having a first portion for attaching a panel thereto, a second portion for pivotally mounting to the vehicle, and a third portion for rigidly interconnecting the first and second portions so that the panel can be stably moved in a defined arc between open and closed positions. The first portion is shaped to provide panel attachment and includes a flattened side, two lateral sides extending therefrom, and an opposite side that is partially deformed against the lateral sides to support the flat side. The second portion includes a flattened wall with a transverse hole establishing an axis of rotation, and an extruded support surface extruded from the wall around the hole to improve durability. The third portion rigidly interconnects the first and second portions, and is shaped to avoid interferences on the vehicle, receive wires for routing therein, and provide drainage for moisture collected therein.

Abstract: A hooking clasp for a cord-like member is provided which can simply and securely bind objects and furthermore, can be used repeatedly. The hooking clasp of the invention has a structure in which two elastic flat plates are fixed at their center portions, and a cord-like member such as a cord or rope is inserted into a gap formed between the flat plates and is hooked and wound on the fixed center portion for being pinched by the flat plates. An alternative hooking clasp of the invention has a structure in which an annular ring-shaped holding groove having almost the same width as a diameter of the cord-like member is engraved on a periphery of a cylindrical body and the cord-like member is hooked and wound for securement on the holding groove.

Abstract: Breakable safety device, comprising a body (1) with alternating securing points (2, 3, 4, 5) and zones of weakness (6, 7, 8) where the zones of weakness are given successively increasing/decreasing breaking strength. A field of using such safety devices are when exercising dogs from a bike.

Abstract: A cord lock device for binding to a cord including a substantially flexible cord lock member having a predetermined length, width and thickness and first and second longitudinal ends and an aperture extending through the cord lock member proximate the first end of the cord lock member, the aperture having a predetermined configuration selected with respect to the cord lock member, the position of the aperture with respect to the first end of the cord lock member, the flexibility of the cord lock member and the particular dimensions and material of the cord so that after threading of a portion of the cord through the aperture, the aperture, the cord lock member and the cord cooperate to provide an engagement force between the cord lock member and the cord sufficient to restrict movement of the cord through the aperture.

Abstract: A cord clamp for a lampholder includes at least two tongue elements which are mutually, reciprocally and relatively movable, and between which a cord can be gripped with the aid of a clamping keeper member. The tongue elements are laterally movable in relation to each other, with their base arranged at an opening in the end portion of the lampholder. The base portion is in sliding engagement against the end portion, and the other free ends or top portions of the tongue elements are adapted to extend through an opening in a disc-shaped top portion of the clamping keeper member. The clamping keeper member further includes hooked snapping tongues projecting from the disc-shaped element which cooperates with complementarily formed locking grooves on the lampholder. The keeper member, in its position fully thrust over the tongue elements and the end portion of the lampholder, achieves a permanent snap fastening of itself as well as secure positional fixation of the cord in the lampholder.

Abstract: Rib and groove snap-type action securing elements are formed respectively on buckle bases and caps so that a number of different buckle caps can be disposed for co-action with a single base to fabricate a number of different buckle assemblies. In one embodimenmt the rib is carried by a depending circumferential wall of the cap for co-action with a circumferential groove formed in the base, while in another embodiment the rib is carried by an upstanding circumferential wall of the base for co-action with a groove disposed peripherally about the cap. In other embodiments a disk-like intermediate cap is disposed between a base and a top cap formed with a surrounding depending wall with a bead along its lower edge for co-action with the lower edge of the base.

Abstract: A novel and improved slider with a yoke for a slide fastener and a novel and improved method for attaching or joining the yoke to the slider body, which may be carried out in simple operation to be attractive in appearance and to provide firm combination between the yoke and the slider body.The front and rear support posts the slider body are respectively provided with locking groove and the contact faces of the yoke are also provided with bulged portions opposite to the locking grooves. In a preferred embodiment, after the support posts are covered with the yoke, a press force is applied to the bulged portion in the forging process to flow the material of the bulged portion into the locking groove so as to provide the firm combination.

Abstract: A fastening connection between a cushion covering and a support for the cushion is disclosed. The support may be molded from a thermoplastic resin by injection. The connection comprise a hook profile strip which snaps into position fastening the edge of the cushion cover to the support. The support is characterized in that it has a U-shaped edge having recesses and projections for engaging with the hook profile strip.

Abstract: A quick release mechanism for releasing two members joined together under tension. The force necessary to release the mechanism is substantially independent of the tension being carried by the device. This is accomplished by providing a contact surface between the latch and its holder such that the moment necessary to release the latch holder must not increase with frictional force or normal force at the point of contact between the latch and latch holder. An equation that provides the configuration necessary to achieve this objective is derived which yields a logarithmic spiral solution set. The spiral expands from zero to infinity, with any portion of the curve being a valid solution to the curve that must machined into either a latch holder surface or a latch surface. The invention may also be used to provide a mechanism that will release once a pre-determined tension has been obtained, i.e., a reusable "week link" or the inverse "weak link", i.e.

Abstract: A safety belt buckle comprises a housing with an insertion path, a spring loaded ejector positioned in the insertion path, and a recess communicating with the insertion path. An insertion tongue with a cutout is insertable into the insertion path. A latch inside the housing locks the insertion tongue by engaging the cutout of the insertion tongue and the recess of the housing. A spring-loaded slide key is slidably connected to the housing and slidable in the direction transverse to a plane of movement of the latch. A spring-loaded slide key serves to release the latch. A compensation mass member is displaceably arranged within the housing for compensating acceleration forces acting on the safety belt buckle. A securing element is displaceably arranged within the housing such that the securing element secures the latch in its locking position and is movable into a release position by the slide key.

Abstract: Means and method for extracting moisture from a traveling web of textile material containing high-moisture content processing fluid using a fluid applicator extending transversely across the path of the traveling web for applying low-moisture content fluid through holes in a distribution manifold on one side of the traveling web. A flow restricting roller is disposed on the opposite side of the travelling web in opposition to the fluid applicator holes closely downstream from the holes and serving to confine the low-moisture content fluid flow from the applicator into and through the traveling web, thereby causing displacement of high-moisture content fluid from the traveling web with low-moisture content fluid. The flow restricting roller is disposed at a spacing above the applicator less than the free-standing thickness of the traveling web and applies pressure to compress the traveling web and effect flow restriction.

Abstract: The invention pertains to a method of manufacturing a semiautomatic pistol, wherein the pistol frame is made by cutting, stamping, folding and welding a metal sheet, and then the working parts of the pistol are assembled with the frame.

Abstract: A quick change mounting system for machine tools provides tool-carrying fixtures having a system-standard dimensional referencing system and fluidically controlled tooling to effect the desired machining operations. The tool-carrying fixtures are mounted to and dismounted from a system-standard tooling plate that carries fluidic supply conduits and mutually operative connectors that effect connection and disconnection of the fluidic system in response to the mounting or dismounting of the tool-carrying fixtures on its mounting plate. A change from one tool-carrying fixture to another can be accomplished by dismounting the former tool-carrying fixture from its mounting plate and mounting a replacement tool-carrying fixture.

Abstract: The present invention provides a roll for a fixing unit including a sponge layer which has a multiple of through holes parallel to a longitudinal direction of a metal core and aligned in a circumferential direction of the metal core at a predetermined gap, or a through hole helically formed along the longitudinal direction of the metal core, and which is formed on a circumferential surface of the metal core, and a surface coating layer applied on a circumferential surface of the sponge layer.

Abstract: A cam shaft assembly (10) constructed from a plurality of lobes (14) spaced along the longitudinal axis of a tubular shaft member (12). Each lobe (14) is defined by a body portion (16) and a camming portion (20). The lobes (14) define a pair of oppositely facing radially extending side surface (22) which have axially extending shoulders (24) thereon. The shoulders (24) are for mating engagement with a gauging surface (44) to positively position the lobe (14) angularly with respect to the longitudinal axis while the lobes (14) are being secured to the tubular shaft member (12). The assembly (10) also includes bearing journals (18) on the tubular shaft member (12). A method and apparatus for making the cam shaft assembly (10) are also provided.

Abstract: A hand-held impact tool for effecting terminations in a telecommunications terminal block uses a blade with a setting edge and a pivotable cutter for cutting a conductor wire. Several impact settings for varying the seating impact force at the blade are settable by moving a pouch relative to the handle in one direction. Movement of the pouch in another direction will allow release of a blade stored inside the pouch or insertion of a blade into an empty pouch. A switch on the handle allows the cutter to be actuated by compression and release of the tool or to be disengaged so that only an impact seating function occurs.

Abstract: A method for winding stator coils and fabricating laminated iron stator rings, then assembling same into an annular stator column for use in a linear flow electromagnetic induction pump for pumping electrically conductive liquid metal and circulation of same through the coolant circuit of a nuclear fission reactor plant or other liquid metal systems.

Abstract: A method of assembling an electromagnetic interference filter comprises the step of disposing electrical components on a base. The components are connected to form an electromagnetic interference filter. The filter is enclosed in a metal case, which is formed by folding a metal sheet around said filter and joining the ends of the sheet together. The metal sheet has an insulating coating disposed on one side to prevent contact between the filter components and the case. The outer surface of the case is sealed with seal tape.

Abstract: The head is made up of a first core block having a first core, and a second core block having a second core and a coil wound therearound. The core blocks each has a pair of slider blocks which hold the first or second core between the bonding surfaces thereof. The first core forms part of the bonding surface of either one of the pair of slider blocks or is buried in the bonding surface of either one of the slider blocks, so that the bonding surfaces are flat.

Abstract: An apparatus (10) for visually aligning parts (13) for placement using one camera (18) comprises a device (12) for picking and placing a part on an object (15), a device (24, 26 & 28) for moving and removing optics (30, 36, 38) into and out of a work envelope having the object, a device (18, 40, 42 & 44) for locating landmarks on the object within the work envelope, and a device for aligning the part with the landmark in the work envelope.

Abstract: A parts mounting apparatus includes a structure (34) on which a spindle (31) is supported to be movable up and down, and the spindle has a vacuum suction path (36). Either a normal nozzle (50) or a nozzle for image recognition (141) can be attached to a lower end of the spindle. When the normal nozzle is attached to the spindle, parts positioning jaws (61a-62b) supported on the structure performs a centering operation of the parts sucked to the normal nozzle in accordance with vertical movement of the spindle by a cam device (90) and a motor (93). When the nozzle for image recognition is attached to the spindle, a CPU (201) controls the motor so that rise of the spindle can be stopped before the nozzle for image recognition enters an operating region of the jaws.

Abstract: For machine used to balance disk brake rotors having radial walls defining tapered recesses by inserting tapered weights into selected recesses, a magazine holds a stack comprised of a controlled number of the weights and permits the weights to exit individually. Each exiting weight is oriented radially with its narrow end pointing into a selected recess. An inserter and a double-acting, pneumatic, piston-cylinder apparatus are provided for removing the lowermost weight from the magazine and inserting such weight into the selected recess. Photoelectric detectors are provided for detecting when the magazine has been depleted of a specified number of the weights, when the magazine holds the controlled number of the weights, and when the magazine has been completely depleted of the weights. The magazine has a gate for admitting the weights under certain conditions.

Abstract: A method and apparatus for interconnecting electronic circuits using nearly pure soft annealed gold mechanically compressed within through-plated holes. The invention has its application in attaching integrated circuit dice directly to circuit boards by ball bonding gold wires to the bonding pads of the integrated circuit dice in a substantially perpendicular relationship to the surfaces of the dice and inserting the gold leads into through-plated holes of circuit boards which provide an electrical and a mechanical connection once the leads are compressed within the through-plated holes. The present invention also finds its application in the interconnection of sandwiched circuit board assemblies where soft gold lead wires are inserted into axially aligned through-plated holes of the circuit boards and compressed so that the gold lead wires compress and buckle within the through-plated holes, forming an electrical connection between the circuit boards.

Abstract: A method of manufacturing a printed circuit board comprises the steps of providing an insulating substrate for the printed circuit board, forming circuit patterns made of a conductive material on at least one side of the insulating substrate, forming an insulating layer on the circuit patterns, and adhering a cross-mesh shield layer onto at least a portion of the insulating layer in such a manner that a margin is placed both on the outer periphery of the insulating layer itself and around electric contacts such as lands and through-holes.

Abstract: A method for assembling an assembled shaft from a tubular or bar-shaped base member (R) and individual slid-on elements (N), especially a camshaft, with the elements being for example cams, gears or bearing bushes. In the method, the elements (N) are slid on to the base member (R) and are held in the required angular position to be fixed on the base member by magnetic forces. An apparatus for carrying out this method comprises a guiding device (13) for guiding the elements into their axial positions and magnetic holding means (5) operable to hold the elements in the required angular position.

Abstract: A method for the manufacture of panel heat exchangers from thermoplastic polyamides. At least one sheet is coated with a coating that facilitates bonding of the polymer to itself under the influence of heat. Two sheets, at least one of which has been coated, are placed between moulds in a press. At least one of the moulds has grooves corresponding to the pattern of fluid flow passages to provided in the panel heat exchanger. The moulds are heated and an inert gas e.g. nitrogen, is applied and passed through the fluid flow passages, to assist in the formation of the passages and to remove any voltatile material from the coating. The preferred coating is benzyl alcohol, phenol and polyamide. The heat exchangers may be used in a variety of end-uses, especially in automotive end-uses.

Abstract: A one-piece metallic belt driven pulley has a hub, an annular belt engaging wall having an outer belt engaging surface and a radially extending web that connects the hub and belt engaging wall. The hub has an internal bore defined by a tubular inner surface. At least a portion of the tubular inner surface that defines the bore has a plurality of axially spaced threads to form an axially extending threaded portion. In use, the threaded portion of the bore is threaded onto an axially extending thread on an outer surface of the shaft to secure the pulley to the shaft. One end of the hub takes the form of a nut having a hexagonal outer configuration that is adapted to be engaged by a tool for screwing the pulley onto the shaft. The other end of the hub forms an axially extending integral spacer, the end of which is located outwardly of an end surface of the pulley.