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| Number | Title | Issue Date |
| 5187832 | Convertible self-proprelled vacuum cleaner A self-propelled vacuum cleaner adapted to be used in an upright mode or, alternatively, in a portable mode. The vacuum cleaner includes a power transmission for self-propelling the vacuum cleaner when used in the upright mode. The vacuum includes a first... | 02/23/1993 |
| 5115537 | Drive system A vacuum cleaner having an improved transmission. The transmission includes speed reduction gearing and forward and reverse clutching elements which provide high power capacity, large speed reduction, durability, quiet operation and smooth power engagemen... | 05/26/1992 |
| 5007133 | Convertible vacuum cleaner A convertible vacuum cleaner providing a detachable upright handle permits the vacuum cleaner to be used as an upright cleaner for cleaning rugs, carpets, and the like. A detachable portable hand cleaner handle is also provided which is mounted when the c... | 04/16/1991 |
| 4877432 | Disposable dust bag for vacuum cleaners and the like A disposable dust bag for vacuum cleaners and the like is disclosed which includes a mounting collar adapted to be removably mounted on a vacuum cleaner connector through which dirt-laden air is delivered to the dust bag. The connector has a generally cyl... | 10/31/1989 |
| 4858269 | Wet/dry vac A wet/dry vacuum cleaner unit having a transparent tube on the exterior of its tank that serves as a sight gage to display the volume of water collected in the tank and as a drain hose for conveniently discharging water from the tank. A suspension system ... | 08/22/1989 |
| 4829624 | Apparatus for producing cleaning suds An apparatus for producing cleaning suds includes a reservoir containing a cleaning solution connected to the outlet of a vacuum cleaner or the like. The apparatus includes a flexible hose connected to the upper portion of the reservoir through which air ... | 05/16/1989 |
| 4800615 | Wet/dry vac A wet/dry vacuum cleaner unit having a transparent tube on the exterior of its tank that serves as a sight gage to display the volume of water collected in the tank and as a drain hose for conveniently discharging water from the tank. A suspension system ... | 01/31/1989 |
| 4791700 | Fresnel lens illuminator for vacuum cleaner An illumination system for a vacuum cleaner including a thermoplastic injection molded lens which, cooperating with a reflector surface, provides a high level of optical efficiency. The lens includes separate prism and diffusion areas which focus light im... | 12/20/1988 |
| 4728942 | Self-powered rotation indicator A rotating beater brush contained within a detachable rug cleaning nozzle of a domestic vacuum cleaner carries a rare earth magnet radially spaced from the axis of rotation of the beater brush. Mounted on an interior wall of the nozzle in juxtaposed relat... | 03/01/1988 |
| 4692754 | Rotation indicating device A small self-contained unit is provided to indicate rotation of a machine element such as a brush in a domestic vacuum cleaner. The rotation indicating device may be mounted inside the nozzle of the vacuum cleaner so that through an aperture in the vacuum... | 09/08/1987 |
| 4683607 | Vacuum cleaner accessory bracket A bracket for carrying an accessory appliance on an elongate handle of a primary appliance comprises a bracket body which is contoured to fit on the handle in a sleeve-like manner. The bracket body is pivoted to the primary appliance by a pivot pin which ... | 08/04/1987 |
| 4685046 | Low voltage direct current power supply A full-wave bridge rectifier has its input connected directly across a 115 volt RMS alternating current line operating at 60 Hz wherein the output of the bridge provides 120 Hz pulsating direct current at 161 peak volts. A pair of transistors, switching o... | 08/04/1987 |
| 4682082 | Gas discharge lamp energization circuit An electronic energization circuit is provided to illuminate a gas discharge lamp that includes a transformer with a substantially rectangular hysteresis loop. A secondary winding on the transformer is connected to energize the lamp and at least one prima... | 07/21/1987 |
| 4631539 | Digital pointer position detector A mechanical dial indicating gauge or meter that, without mechanical loading, optoelectronically detects and encodes the pointer position as a digital signal by use of a technique of distributed point position latching. Counter means drives a circuit whic... | 12/23/1986 |
| 4625560 | Capacitive digital integrated circuit pressure transducer A highly accurate and miniaturized pressure transducer is disclosed which includes first and second capacitors as a part of the integrated circuit, which also includes an Eccles-Jordan astable multivibrator. The miniaturization of both the capacitors and ... | 12/02/1986 |
| 4610047 | Vacuum cleaner of interchangeable attachment type An upright vacuum cleaner has a removable powered brush vacuum nozzle which can be removed and replaced without operation of a belt lifter. The power linkage from the cleaner's fan motor to the nozzle brush includes a positive-drive clutch, and control me... | 09/09/1986 |
| 4579014 | Incremental drive for a sequential timer A sequential ratchet drive for an appliance timing cam is disclosed. The drive includes a pawl adapted to drive ratchet teeth located on the periphery of a main program cam in a step-by-step manner. The pawl is driven and guided by cams against and with t... | 04/01/1986 |
| 4573235 | Rug cleaning attachment A rug cleaning attachment for a vacuum cleaner is disclosed. The attachment has a suds confining chamber and a scrubbing brush roll mounted thereon for rotation about a horizontal axis within the chamber. The brush roll has a multiplicity of tufts which a... | 03/04/1986 |
| 4539562 | Load current monitoring device for detecting predetermined degree of change in load impedance Current provided to a generally constant impedance load is monitored to detect a predetermined load current decrease not resulting from normal load voltage fluctuations, such decrease indicating an abnormal increase in load impedance. A latching alarm is ... | 09/03/1985 |
| 4514199 | Vacuum cleaner dirt box A dirt box for an upright vacuum cleaner comprises an elliptical upper side wall portion below a top wall, a bowl-shaped bottom wall, an inlet neck opening into the chamber in the lengthwise direction and below one end of the upper side wall portion, and ... | 04/30/1985 |
| 4414634 | Fluid flow totalizer A data totalizer for use with a fluid flow chart recorder is disclosed. The chart recorder may be for a gas well to record the flow of gas into a collection pipe and such chart recorder has a movable chart, usually a circular chart, with a first marker pe... | 11/08/1983 |
| 4384386 | Motor for rotating brush An electric motor construction and method particularly adapted for integration in rotating final drive members. The motor includes a hollow armature assembly rotatably supported about a permanent magnet stator. The armature assembly includes a winding pre... | 05/24/1983 |
| 4369403 | Power factor controller for induction motor An AC induction motor for driving a varying mechanical load is powered via a Triac switch electrically inserted in series with the motor and its AC supply. A low ohmic value resistor, also in series with the motor, continuously samples the load current. W... | 01/18/1983 |
| 4323835 | Simplified power factor controller for induction motor A phase-triggered, gate-controlled AC semiconductor switch, in series with an induction motor and its AC supply, optimizes power flow to the motor under changing mechanical load conditions by varying the amount of supply voltage applied to the motor over ... | 04/06/1982 |
| 4287464 | Power factor controller for an induction motor using transistor switch means with variable breakdown voltage A phase-triggered, gate-controlled AC semiconductor switch of the thyrister type in series with an induction motor and its AC supply, optimizes power flow to the motor under changing mechanical load conditions by varying the amount of supply voltage appli... | 09/01/1981 |
| 4271386 | Power factor controller for induction motor A phase-triggered, gate-controlled AC semiconductor switch, in series with an induction motor and its AC supply, optimizes power flow to the motor under changing mechanical load conditions by varying the amount of supply voltage applied to the motor over ... | 06/02/1981 |
| 4250400 | Flexible temperature self regulating heating cable Electrically parallel but positionally serial, helically wound segments of heating wire in a cable are each controlled by a chip (thermistor) and are connected to the cable proper by wrapping around notches formed in the insulation of the cable proper at ... | 02/10/1981 |
| 4232308 | Wireless alarm system A radio receiver equipped central control unit continuously monitors at least one battery-powered remote transmitter activated in response to predetermined alarm conditions, such as open doors and windows, fire, smoke, low transmitter battery voltage, and... | 11/04/1980 |
| 4202180 | Liquefied gas supply system In a liquefied gas supply system, a pressure switch senses pressure in the low-pressure supplied line of the system and opens a bypass valve to thereby bleed gas from the relatively warm reserve side and keep up the pressure in the supplied line while all... | 05/13/1980 |
| 4159860 | High voltage cable coupler with termination adaptor A high voltage cable coupler for releasably connecting together one or more high voltage cables having a concentrically located insulated conductor bounded by a semiconductive and/or metallic shield. The cable housing is provided to be in two moisture-pro... | 07/03/1979 |
| 4120557 | Electrical connector An electrical connector is provided with a louvered interconnection strip in which the louvers provide edge pressure on the interconnection surface of one connector member, such as a plug or socket, and interior (non-edge) rib pressure on the complementar... | 10/17/1978 |
| 4114230 | Deflator-inflator attachment A nozzle attachment for use in combination with a vacuum cleaner to inflate or deflate air expandable articles, a portion of the nozzle having a relatively large diameter for coupling with the free end of a flexible hose, a relatively small extended tip p... | 09/19/1978 |
| 4084948 | Vacuum cleaner filter bag assembly A filter bag assembly for a vacuum cleaner is disclosed. The assembly includes an elongated, relatively rigid, hollow tube coupled at one end to the exhaust of a vacuum cleaner. The tube runs upwardly along the handle of the vacuum cleaner and is attached... | 04/18/1978 |
| 4074926 | High voltage electrical connector A universal electrical connector particularly adaptable for terminus applications of high voltage cables. The insulative body portions of the connector employ a combination of engaging primary and secondary tapers. One body portion represents a plug membe... | 02/21/1978 |
| 4068341 | Transparent belt lifter mounting for vacuum cleaners An upright vacuum cleaner is disclosed providing a belt lifter operable to connect and disconnect the floor brush belt from the motor drive shaft. The belt lifter combines a viewing window allowing the user to easily observe the position of the belt and/o... | 01/17/1978 |
| 3971216 | Load responsive system with synthetic signal A load responsive hydraulic system uses a signal supply restrictor, a synthetic signal generator and a unique directional control valve to provide a signal fluid having a pressure magnitude which is at a predetermined value above the load actuating pressu... | 07/27/1976 |
| 3937129 | Load responsive system with area change flow extender A load-responsive hydraulic system is provided in which the effective output of a fixed displacement pump is controlled by a bypass valve having three fluid-responsive areas. The first fluid-responsive area is pressurized by pump pressure; and the directi... | 02/10/1976 |
| 3932933 | High voltage cable coupler with termination adaptor and method of constructing cable termination A high voltage cable coupler for releasably connecting together one or more high voltage cables having a concentrically located insulated conductor bounded by a semiconductive and/or metallic shield. The cable housing is provided to be in two moisture-pro... | 01/20/1976 |
