Abstract: A stick vacuum cleaner having a handheld vacuum cleaner adapted to be docked to a stick. When the handheld vacuum cleaner is docked to the stick an air path is formed connecting an air outlet of the handheld vacuum cleaner with an air outlet provided in the stick. A noise absorption unit is provided in the air path or outside the air outlet from the stick.

Abstract: A backpack vacuum cleaner motor mounting assembly having a first housing, a suspension housing, a suction motor, and one or more springs. The first housing has an inlet, outlet and a suspension chamber in it. The suspension housing is at least partly in the suspension chamber, can move a predetermined distance along a suspension direction from a first position to a second position, and is restricted from moving perpendicular to the suspension direction. The suction motor is connected to and moves with the suspension housing. The springs are oriented to bias the suspension housing from the second position to the first position. A backpack vacuum cleaner having a suction motor in a movable suspension housing is also provided.

Abstract: The present invention relates to a vacuum cleaner having a motor housing provided with an inlet and an outlet, a motor and suction fan unit, which is arranged in the motor housing and which is arranged to create a suction flow in through the inlet of the housing, through the motor and suction fan unit and out through the outlet of the motor housing. The vacuum cleaner further comprise holding means for holding the motor and suction fan unit at the motor housing and sealing means arranged to guide the suction flow from the inlet of the motor housing and into the motor and suction fan unit in a sealingly manner. The holding means is arranged to prevent propagation of vibrations originated in the motor and suction fan unit from the motor housing by the holding means responding resiliently to forces from the motor and suction fan unit, and the holding means carries the motor and suction fan unit at the housing.

Abstract: A fan motor apparatus of a vacuum cleaner having a diffuser unit is provided. The fan motor apparatus of a vacuum cleaner includes a fan motor unit into and from which an air stream is introduced and discharged in the same direction, and a diffuser unit having an air suction area to discharge an air stream to the fan motor unit through a fluid passage surface, the fluid passage surface through which an air stream is drawn in and discharged out of the diffuser. An air discharge area of the diffuser unit may receive the air stream discharged from the fan motor unit, and distribute and discharge the air stream through a perimeter of the air suction area of the fluid passage surface.

Abstract: A cyclonic separator for a vacuum cleaner that includes a cyclone stage, a chamber and a silencer. The chamber has a plurality of ports through which fluid from the cyclone stage enters the chamber. The silencer is located in the chamber and includes a plurality of baffles. Fluid entering the chamber through the ports collides with the baffles, which act to reduce noise.

Abstract: A portable handheld canister vacuum including an upper, central, and lower housing is disclosed. First and second grills can separate the housing sections. An air intake opening can direct air and dirt in a first axial direction to a dirt capturing device in the lower housing. An air propulsion device directs air in a second axial direction opposite to the first axial direction into the central housing and from there into the upper housing. An exhaust opening disposed through the upper housing and leading to the interior region of the upper housing allows air to exit the interior region of the upper housing. The exhaust can exit the upper housing in a direction substantially perpendicular to the first and second axial directions.

Abstract: A connecting tube having a dust sensing function is provided. The connecting tube includes a tube element having a first air flowing passage; a body having a second air flowing passage to communicate with the first air flowing passage; a detecting sensor disposed on the second air flowing passage to detect whether the dust or dirt passes through the second air flowing passage; a lamp part to operate according to a signal outputted from the detecting sensor; a rotating part rotatably disposed on the body; a rotation driving-passage part disposed on the body to draw in an external air into the second air flowing passage and thus to rotate the rotating part; an electric generator connected to the rotating part to generate an electric power; and a muffler part to reduce noises from the rotating part and the flowing air.

Abstract: A cyclone silencer of cleaner includes an outlet pipe(2) partially inserted into a cyclone cylinder (1). Ribs (3) are arranged on the lower edge of said outlet pipe (2) and extend downwardly to reduce noise.

Abstract: A dust collector includes turbofans with inducers fixed to the shafts of electric motors. The electric motors are fixed to the rectangular body with mounting legs. The dust collector further includes a single dust collecting filter under the turbofans. The turbofans have a diameter ranging from 40% to 50% of the length of the short side of the body.

Abstract: A cyclone dust collector includes a cyclone body including a first cyclone chamber to centrifugally separate dust from drawn-in air for a first time, a plurality of second cyclone chambers to centrifugally separate dust from the drawn-in air for a second time, and a plurality of discharge ports to cause the drawn-in air to be discharged from the plurality of second cyclone chambers; an upper cover to cover an upper portion of the cyclone body, the upper cover having an inner wall facing the plurality of discharge ports; and a noise reduction part disposed between the plurality of discharge ports and the inner wall of the upper cover, to reduce noise generated inside the upper cover by the air discharged through the plurality of discharge ports. Therefore, it is possible to reduce noise generated inside the upper cover of the cyclone dust collector.

Abstract: An air filter system for an internal combustion engine of a vehicle can have an indicator for signaling restricted flow of air through a replaceable air filter member mounted to a filter assembly. At least one sidewall can be associated with the replaceable air filter member to be positioned with an air stream passing through the air filter member. A resettable air filter status indicator can provide a visually perceivable signal external of the filter assembly. The resettable air filter status indicator can be integrally formed in the sidewall for indicating if a mounted air filter member requires replacement in response to air intake differential pressure with respect to atmospheric pressure on a downstream side of air flow through the replaceable filter member being above a predetermined threshold value.

Abstract: A vacuum cleaner includes at least one cyclone dust separation unit. A cover is formed over the cyclone dust separation unit to attenuate noise generated by the cyclone unit. Dimples or recesses may be formed on the interior of the cover to further attenuate noise. In addition, a noise attenuating material may be inserted between the cyclone dust separation unit and the cover.

Abstract: A cyclonic separator/collector device for a suction cleaner, comprising a housing and at least one cyclonic separator disposed within the housing, the or each cyclonic separator having a cyclone body with a circumferential wall of which at least a major part is spaced from the housing; the space between the housing and wall of the cyclone body(s) receiving separated dust from the cyclonic separator(s); wherein the space between the cyclone body and the housing includes a sound-insulating material. The arrangement provides sound insulation for the cyclonic separators.

Abstract: A power unit for an in-wall vacuum cleaning system has a first compartment which contains a motor for producing a vacuum at remote wand receptacles and a second compartment for separating and collecting the debris. An improved sound reducer is mounted in the motor compartment for reducing the sound level emitted by the motor and providing good cooling airflow for the motor. The sound reducer includes a disc-shaped base having a central opening for receiving a portion of the motor and a pair of partitions mounted on the base and forming a plurality of irregularly-shaped sound passages for breaking up the sound waves traveling therethrough. The base and partitions are formed of an acoustic foam which assist in absorbing the sound waves.

Abstract: A filter assembly configured for acoustic dampening for use with compressor assemblies such as oxygen concentrators including a compartmented housing member having an inlet opening, an outlet opening, a filter member, and a plurality of noise attenuating members positioned and located therewithin. The configuration of the compartmented housing member in conjunction with the positioning and location of the filter member and the noise attenuating members therewithin all contribute to absorb and dissipate any sound waves generated within the housing member due to air flow movement therethrough. This substantially reduces and minimizes noise associated with the present filter assembly.

Abstract: Disclosed is a vacuum cleaner which can remove sludge, bad smells and toxic gases and discharge the filtered air to the upper portion of the vacuum cleaner to prevent the filtered air from being sucked with non-filtered air into the cleaner again. The vacuum cleaner includes: a dust collector having a suction hole; a cleaner body sealably assembled on the upper portion of the dust collector; a handle hinged on the upper portion of the cleaner body; a filter assembly assembled inside the dust collector and having a disc filter located on the lower surface of the cleaner body, an activated carbon filtering part located under the disc filter and a cone type filtering part located under the activated carbon filtering part; and an air discharging unit assembled on the air discharging part of the cleaner body.

Abstract: A specially arranged vacuum loader and industrial dust collector with a perforated plate tangential cyclone separator is provided to efficiently remove, readily collect, effectively separate and safely dispose of wet, dry and fibrous materials, including liquids and slurries. The special vacuum loader and industrial dust collector has a solids-gas separation compartment comprising a tangential cyclone separator, preferably a perforated plate tangential separator, which is positioned generally alongside and laterally offset from one or more filtering compartments to minimize turbulence and re-entrainment of the collected particulate material.

Abstract: A silencer for a vacuum cleaner is provided and includes at least one hermetic expansion chamber mounted in an exhaust channel of the vacuum cleaner and allowing an exhaust airflow from the vacuum cleaner to pass through. The expansion chamber at its two sides has an inlet and an outlet connected to the exhaust channel. A silencing board is mounted in the expansion chamber, separating the inlet from the outlet. Pores are distributed throughout in the silencing board. The silencer integrates several different silencing structures together, and, when mounted to the exhaust port of the vacuum cleaner, can considerably diminish the noise generated by the vacuum cleaner in operation.

Abstract: A specially arranged industrial dust collector with multiple filtering compartments is provided which is efficient, effective, and economical. The special industrial dust collector has a solids-gas separation compartment which is positioned generally alongside and laterally offset from multiple filtering compartments. The multiple filtering compartments can contain cartridge filters or other filters. The solids-gas separation compartment can contain a tangential cyclone separator or another type of solids-gas separator.

Abstract: A suction cleaner comprising a motor which operates a blower in such a manner that the blower blows a flow of air out into a motor chamber that delimits a volume which extends at least radially around the motor, and then out through outlet openings arranged in said motor chamber, and wherein the motor chamber is provided with a silencer element made of a silencing material, such as foamed plastics, said silencer element enclosing the motor radially and forming a silencing chamber around the same, and wherein the silencer element is provided with flow passages which substantially constitute the flow connection from said silencing chamber to the outflow openings in the motor chamber. The fact that the flow passages in the silencer element according to the invention extend axially along the motor in substantially the entire length thereof provides an optimum silencing effect.

Abstract: In a vacuum cleaner a suction motor is installed in a front casing. The front casing has a first main body with a first suction opening connected to the suction motor. An opposite side face of the first main body is opened. A lower chamber communicates with the first main body by a penetrating hole. An upper chamber is installed on an upper part of the first main body. The lower chamber and the upper chamber communicate with each other by a rear casing which covers the front casing. An air guider is installed inside the front casing. The air guider has a second opened side face, an opposite second closed side face closed with a closing plate, and a top penetrating hole formed through a top surface of the second main body. The closing plate closes the opened side face of the first main body. Thus, air sucked into the suction motor is exhausted to an inside of the air guider.

Abstract: A method is disclosed herein for forming characters, figures, logos and the like on the surface of an article such as a record which is produced from a pattern. The pattern is formed initially according to customary techniques, and the characters are then chemically etched into the surface of the pattern so that the characters will appear in proper form upon the article produced from the pattern. The pattern may be formed from any metal or other material which may be chemically etched with sufficient resolution. The article formed from the pattern may be produced by a number of known processes such as molding, pressing or stamping. A particular application for the method of the present invention is in forming the general and proprietary information in the central portion of a phonograph or video tape record which may, for example, be stamped from the pattern.

Abstract: A video disc master of glass, having a metal surface with microscopic apertures therein representing information, is coated with a photosensitive resist. The resist is uniformly exposed through the glass disc. The unexposed resist is removed. The resulting disc having surface irregularities can be used in a first process to produce "stampers" for embossing replicas and, in a second process, to produce a mold for casting replicas.

Abstract: Method for obtaining an engravers template having a desired pattern therein with engraved portions and raised portions. An aluminum sheet is provided having an aluminum oxide layer on one side and a plastic layer on the opposite side. The desired engraved pattern is etched through the oxide layer and through the aluminum sheet.

Abstract: A method for making an improved member of a position measuring transducer is disclosed, wherein the member has a pattern of uniformly pitched bars thereon. The method comprises the steps of superimposing a plurality of positionally shifted latent images of an initial pattern of bars having approximately uniform pitch upon a photo-sensitive material, and then processing the photo-sensitive material to produce a production pattern of bars having a significantly more uniform pitch than the initial pattern. The production pattern is used to produce an improved member of a position measuring transducer having a correspondingly greater accuracy than a transducer incorporating a member made directly from the initial pattern. A procedure for selection of the processing parameters to control the uniformity of spacing between bars and to adjust the width and relative position of the "gray" transition region at the bar edges is also taught. Finally, the production of improved scale members of INDUSTOSYN.RTM.

Abstract: A method for the manufacture of an expanded article having an embossed surface comprises exposing the surface of a layer of photo-setting and expandable resin composition to partially screened light to cure only that portion of the layer of resin composition which has been exposed to the light, and then heating to expand the layer of resin composition, whereby indentations are formed in the surface.

Abstract: An apparatus for three-dimensional viewing of stored color information. A microfiche (lensfiche) formed by known techniques is viewed without the requirement of special glasses worn by an individual viewing the display. Each lens of a lenticular lensplate is associated with a pair of apertures, the apertures receiving light polarized in two mutually orthogonal directions. One aperture of each aperture pair passes only polarized light of one kind and images this light at a point in front of the lensplate corresponding to the normal viewing position of one eye. The other aperture of each aperture pair passes only polarized light of the other kind and images this light at a point in front of the lensplate corresponding to the normal viewing position of the other eye. This is a Division of application Ser. No. 582,170 filed May 30, 1975, now U.S. Pat. No. 4,012,116.

Abstract: A recording blank, composed of at least one diffraction grating substrate, such as nickel, covered with a layer of photoresist is used to produce an embossing master by exposing the photoresist to picture information composed of respective white and non-white manifesting regions; developing the exposed photoresist to reveal the grating portions underlying solely the white manifesting regions; electroplating and/or etching the revealed portions to level and obliterate the revealed grating portions, and then removing the remainder of the photoresist.

Abstract: Electrostatic imaging apparatus for transfer development of latent images employing a developer donor member with a plurality of raised micro-pins on the donor surface, for self-spacing the donor from the imaging surface. Methods of producing such donors are disclosed.

Abstract: A double exposure and double etch technique for producing precision parts from a photosensitive material is described. The process is described in terms of producing an array of ink jet charge electrodes which comprise a series of small through holes on accurately defined centers. The process comprises the steps of exposing the photosensitive material through a mask to develop an undersized through hole and heat treating the photosensitive material to change its characteristics so that an etchable material is produced in the exposed area. The material is then etched to form the undersized through hole which is substantially tapered. The material is then exposed again with a full sized mask including any conductor patterns and the material is again heat treated. The material is again etched and this etching, in the nature of a surface etch, reduces the taper because of the lower etch rate of the unexposed material as compared to the much higher etch rate of the previously unetched tapered material.

Abstract: A method for making a color imaging device that comprises means for sensing radiation comprising a planar array of charge-handling semiconductive photosensors, at least some of the photosensors having a radiation sensing area with at least one dimension less than about 100 micrometers, and superimposed thereon, filter means for controlling access of radiation to the sensing means. The filter means comprises a transparent, polymeric dye receiving layer for receiving heat-transferable dyes and further comprises a plurality of radiation intercepting means defining a planar array of filter elements lying in the receiving layer in micro-registration with the sensing areas of the photosensors. The filter area of each intercepting means contains at least one heat-transferable dye transferred to the dye receiving layer by heating and diffusion. The heat-transferable dye absorbs radiation in at least one portion of the spectrum and transmits radiation in at least one other portion of the spectrum.