Did You Know...
...that after Parker Brothers executives turned down the game of Monopoly because it had "52 fundamental errors" (including taking too long to play), a copy of the game wound up in the home of the company president who stayed up until 1 a.m. to finish playing it? He was so impressed by the game that the next day he wrote to inventor Charles Darrow and offered to buy it!
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| Number | Title | Issue Date |
| 6813809 | Vacuum cleaning tool with rotating brush roller A vacuum cleaning tool of a vacuum cleaning device has a housing with a turbine chamber and a working chamber. The housing has a suction slot extending transversely in the vacuum cleaning tool. A suction airflow generated by the vacuum cleaning device enters the wor... | 11/09/2004 |
| 6615445 | Vacuum cleaning tool with direct flow turbine A vacuum cleaning tool has a housing with a brush chamber and a turbine chamber. A vacuum connector is connected to the housing remote from the brush chamber and has an outlet window. A working roller is arranged in the brush chamber and driven by an air ... | 09/09/2003 |
| 6550099 | Vacuum cleaning tool with exchangeable vacuum shoes A vacuum cleaning tool for a vacuum cleaning device has a housing having a vacuum connector connected to the vacuum cleaning device. The housing has an underside and an elongate intake opening arranged in the underside. A brush roll is arranged in the hou... | 04/22/2003 |
| 6484356 | Vacuum cleaning tool with pear-shaped turbine chamber A vacuum cleaning tool has a housing with a brush chamber and a turbine chamber. A vacuum connector is connected to the housing remote from the brush chamber. A brush roller is arranged in the brush chamber and an air turbine is arranged in the turbine ch... | 11/26/2002 |
| 6477735 | Vacuum cleaning tool with an outlet ramp A vacuum cleaning tool has a housing with a partition dividing an interior of the housing into a brush chamber and a turbine chamber. A vacuum connector is connected to the housing remote from the brush chamber. A working roller is arranged in the brush c... | 11/12/2002 |
| 5950275 | Vacuum cleaning tool for a vacuum cleaning apparatus A vacuum cleaning tool having a housing that includes a connector for a vacuum hose of a vacuum cleaning apparatus is provided. Disposed in a brush chamber of the housing is a brush roller, the bristles of which project through a vacuum slot formed in the... | 09/14/1999 |
| 5039133 | Suction nozzle coupling having rotatably mounted therein a connector for a suction hose A coupling of a suction nozzle, with a connector of a suction hose of a vacuum cleaner being rotatably mounted in the coupling, whereby the connector, on an end thereof that faces the suction nozzle, is provided with a larger diameter flange that for the ... | 08/13/1991 |
| 5035154 | Adjustment mechanism for a friction drive unit An adjustment mechanism for a friction drive unit. To adjust the contact pressure between the friction wheel and a cooperating wheel of the friction drive unit, one of these wheels is mounted on a lever that is pivotable about a pivot axis. A cam that app... | 07/30/1991 |
| 5014386 | Suction nozzle, with a brush, for a vacuum cleaner A suction nozzle for a vacuum cleaner, including a brush that is disposed in the suction nozzle and is driven by a battery-powered electric motor. The suction nozzle is in flow communication with the vacuum cleaner via a suction hose. The suction nozzle i... | 05/14/1991 |
| 5008973 | Multi-purpose suction nozzle A multi-purpose suction nozzle, for a vacuum cleaner, for cleaning different types of surfaces, such as hard smooth surfaces, textile floor coverings, and upholstery, whereby the suction nozzle is detachably connected to a suction hose of the vacuum clean... | 04/23/1991 |
| 4827558 | Vacuum conduit arrangement for a central dust-collecting system A vacuum conduit arrangement for use with a central dust-collecting system that is provided in a building. The arrangement includes vacuum conduits that are interconnected by couplings. The arrangement further includes at least one connector for a vacuum ... | 05/09/1989 |
| 4776059 | Vacuum-cleaning apparatus A vacuum-cleaning apparatus for cleaning furniture or the like, especially upholstered furniture, upholstered vehicle seats, etc. The apparatus is connected via a vacuum conduit to a vacuum-cleaning unit. A first vacuum nozzle is provided with a brush and... | 10/11/1988 |
| 4749389 | Method and apparatus for humidifying and purifying the air of a room An apparatus for humidifying and purifying the air of a room. The apparatus has a water supply tank with a cover in which is mounted a motor. Disposed on the motor shaft is a fan wheel for generating a flow of air through the housing, a fan wheel for cool... | 06/07/1988 |
| 4537424 | Cleaning apparatus A cleaning apparatus, especially a suction nozzle, for a vacuum cleaner. The apparatus has a joint pan connected with an apparatus housing, and a joint head connected with an apparatus connecting piece for a handle of the vacuum cleaner. The joint parts a... | 08/27/1985 |
| 4517705 | Suction device for cleaning textile floor coverings A suction device for cleaning textile floor coverings comprising a base member, a central housing, and a cover. A brushing device is detachably mounted closely adjacent to the base member. The base member has a tubular stub receiving a flexibly supported ... | 05/21/1985 |
| 4394606 | Speed control circuit for electric motor Disclosed is an apparatus for controlling the rotational speed of an electric motor based upon the load encountered by the electric motor. A load sensor provides a voltage level based upon the operating load of the electric motor and accumulates this volt... | 07/19/1983 |
| 4209872 | Cleaning implement A cleaning element, particularly a brush for incorporation in a vacuum cleaner nozzle, has a shaft with bristles which shaft has its ends journalled in the housing of a cleaning implement by means of bearings and shock absorbers. In order to give a compac... | 07/01/1980 |
| 4173807 | Cleaning implement A cleaning implement, especially vacuum cleaner, with a brush for incorporation in a vacuum cleaner nozzle, which has a shaft with bristles mounted at its ends in bearings in an implement housing. In order to restrict penetration of hairs and like foreign... | 11/13/1979 |
