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US 5,050,266 AGranted
Vacuum cleaner adapter for micro tools
OwnerNorman J. Schneiderinventor
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OwnerNorman J. Schneiderinventor
Estimating the term…
A vacuum cleaner adaptor for micro tools consisting of an adaptor body of tubular form having a large diameter section for fitting to a conventional vacuum cleaner vacuum intake port or positive air pressure discharge port, an integral conical transition section and a small diameter section for fitting to a small diameter hose or tube or to the micro tool per se. In one form, longitudinal slots of arcuate configuration are formed within the conical transition section of the adaptor body at circumferentially spaced positions and are selectively closed off by a rotatable conical form shield having similar sized longitudinal slots therein. Radially projecting members on the shield and adaptor body limit rotation of the shield relative to the body between a full slot open position and a slot partially open position by circumferentially offsetting the slots of the adaptor body and shield. In a further embodiment, oblique holes are formed within the adaptor body large diameter section, oblique to the longitudinal axis of the tubular body. A sector shaped solid shield is rotatably mounted on the body for closing off given oblique holes to reduce air flow through the oblique holes as desired while ensuring sufficient air flow for preventing overheating of the vacuum cleaner motor of air cooled or air passed type.
A vacuum cleaner adaptor for a micro tool for a vacuum cleaner employing an air cooled or air pass through motor for preventing overheating of the vacuum cleaner motor during operation, said vacuum cleaner including suction and positive air pressure sides passing air flow over or through said vacuum cleaner motor, said adaptor comprising a tubular assembly including an adaptor body having a large diameter tube section for attachment to the suction or positive air pressure side of the vacuum cleaner, a small diameter tube section sized to the micro tool for coupling thereto, and an integral transition section connecting the large diameter section to the small diameter section, one of said adaptor body sections comprising a plurality of air flow ports opening to the interior of the adaptor, and a shield rotatably mounted on said section carrying said plurality of air flow ports for rotation between a first position in which the ports are open to air flow between the interior and exterior of said adaptor body section, and a second position in which said ports are partially closed off to said air flow and said adaptor further includes stop means for limiting movement of said shield to rotation between said first and second positions thereby insuring prolonged air flow through said tubular assembly for passage through or over said motor adequate to prevent overheating of the vacuum cleaner motor with the rate of air flow through the vacuum cleaner being readily adjustable depending upon the nature of the micro tool attached thereto.
A vacuum cleaner adaptor for a micro tool for a vacuum cleaner employing an air cooled or air pass through motor for preventing overheating of the vacuum cleaner motor during operation, said adaptor comprising a tubular assembly including an adaptor body having a large diameter tube section for attachment to the suction or positive air pressure side of the vacuum cleaner, a small diameter tube section sized to the micro tool for coupling thereto, and an integral transition section connecting the large diameter section to the small diameter section, one of said adaptor body sections comprising a plurality of air flow ports opening to the interior of the adaptor, and a shield movably mounted on said section carrying said plurality of air flow ports for movement between a first position in which the ports are open to air flow between the interior and exterior of said adaptor body section, and a second position in which said ports are partially closed off to said air flow and thereby insuring prolonged air flow adequate to prevent overheating of the vacuum cleaner motor with the rate of air flow through the vacuum cleaner being readily adjustable depending upon the nature of the micro tool attached thereto and stop means for limiting said shield to movement between said first and second positions, and wherein said large diameter section of said adaptor body includes a radially projecting rib intermediate the ends thereof, and a radially projecting end wall proximate to said transition section, axially spaced from said rib and defining a circumferential recess therebetween, said shield comprises a semicircular cylindrical section of solid sector shape having an inner diameter slightly in excess of the outer diameter of said adaptor body recess, and being concentrically mounted thereto with opposite ends in abutment with said radial rib and said radially enlarged end wall, and wherein, said multiple air flow ports comprise a plurality of holes within said adaptor body large diameter section at said recess, oblique to the axis of said adaptor body and in at least one circumferential array whereby, rotation of said sector shape shield selectively closes off said oblique holes to vary the rate of air flow through said adaptor.
Dependencies are inferred from the claim text.