mobil cut

Hair clipper - US Patent 5623764HomeBrowse by InventorBrowse by DateLinksContact UsUnited States Patent 5623764 Hair clipperUS Patent Issued on April 29, 1997 Inventor(s)ApplicationNo. 453213 filed on 1995-05-30Current US ClassExaminersPrimary: Hwei-Siu PayerAttorney, Agent or FirmForeign Patent References549704 DE Apr., 1932 AbstractClaimsDescriptionFull TextDescriptionFIELD OF THE INVENTIONThis invention relates to the art of hair clippers that utilizes a vacuumsource.BACKGROUND OF THE INVENTIONBy studying numerous patents in the prior art the Applicant have noticedthat none of them is commercially viable except Hunts U.S. Pat. No.4,679,322. However the disappointing performance and design of it promptedme to start a development effort. It was found that the machine was noisy,under powered, inclined to seizure. Required unusually powerful, 1.5 H.P.vacuum cleaner to operate. A significant obstruction of air flow by thecutting mechanism. It was cumbersome to set up. The machine needed anadditional A.C. outlet, an A.C.-D.C. power supply with cable-connector. Asocket on the hose, a cable in the hose, switch in the head. Needselectricity to operate, coupled with electric shock hazard.It is believed that the subject matter will remedy the aforesaiddisadvantages.OBJECTS AND ADVANTAGESThe object of this invention is to provide a commercially viable, simple,user friendly, quiet, durable device. To accomplish that objectives,developed several essential elements such as:A turbine that is incorporated into the handle of the hair clipper.Produces maximum torque to its size. Equipped with a centrifugal speedregulator that having a minimum of air obstruction. Succeeded to produce140 grams centimeter torque at zero RPM with a 0.75 H.P. motor drivenvacuum cleaner. On a 2.8 millimeter diameter output shaft it translatesinto 1000 grams driving force on the circumference. A turbine havingmaximum torque at zero revolution per minute and zero torque at maximumrevolution per minute. The maximum power output is at half of the maximumrevolution per minute. The centrifugal speed regulator is adjusted toabout 10,000 RPM.A high ratio power transmission that is inexpensive, quiet, durable andhaving high kinetic energy. A friction disc drive has been selected. Thespeed is reduced to one thirtieth and the torque is increased by thirtyfold. The 1000 grams driving force of the turbine with a 9.66 leverageproduces 9,660 grams cutting force, equals 21.46 Lb at near zero RPM. Thekinetic energy adds to it, the friction deduct from it. The Hunts machinestops at 9.5 Lb brake force on the cutting blade. There are a dozenalternative power transmissions. All gears or gears and friction disccombination. They are noisier, cost more, having less kinetic energy butpossess some size advantages.A reciprocating cutting blade mechanism that cuts the hair like a pair ofscissors in both direction. Having cutting edges of 45-60 degree. A verynarrow construction to have minimum obstruction of air flow. Havingfriction only between the blades on small area to require small force tooperate. The moving cutting blade is light weight, to produce negligiblevibration. One of the two blades to be flexible to match easily the otherblade. In case of overload with hair, room provided for the separatingblades to prevent seizure.A set of spacers to define the length of hair after cut. The spacersopenings are small enough to provide great suction force for the hair tobe cut. Small enough to limit the amount of hair sucked in. Large enoughopenings to supply a volume of air to the turbine to provide sufficientmagnitude of power to actuate the cutting blade mechanism. A spacer isconnected to the unit by forced sliding into its place.Further objects and advantages of my invention will become apparent from aconsideration of the drawing and ensuing description.BRIEF DESCRIPTION OF THE DRAWINGFIG. 1 is a front view of the hair clipper. Some parts are broken away tosee the power train and a centrifugal speed regulator.FIG. 2 is a vertical section of the flow chamber to see a bearing support.FIG. 3 is a top view of the hair clipper. Some parts are broken away to seethe centrifugal speed regulator, cutting blade mechanism and the powertransmission.FIG. 4 is a section of the cutting blades.FIGS. 5-8 are the four position of the mobile cutting blade in a cycle.DESCRIPTION OF THE PREFERRED EMBODIMENTWith careful study of the drawing, can be seen how the figures help eachother to understand the instant invention. Certain conventional details ofconstruction that do not pertain to the invention have been eliminated forsake of clarity. A mostly aluminum construction.A turbine having a stator 10 which is the handle of a hair clipper. In astator 10 is a rotor that embedded in ball bearings 11 and 12. Thebearings are fitted in bearing supports 13 and 14. The bearing supportsare fitted into the ends of stator 10. In FIG. 2 can be seen a bearingsupport 14. A rotor having a steel output shaft 15 and two power producinghelical ribbons 16 and 17. The helical ribbons are orthogonally fastenedto the superficies of a core 18. The helical ribbons having anapproximately 45 degree pitch and positioned opposed of each other forbalance. The diameter of core 18 relative to the inside diameter of stator10 is critical. A 1:1.77 ratio provided maximum torque with the givenparameters. The gap between the helical ribbon and the stator is about 3-4thousands of an inch.The speed of a rotor is controlled by a centrifugal speed regulator. It canbe seen at the right ends of FIG. 1 and FIG. 3. The speed regulatorconsist of two bent piano wire springs 19 and 20. One ends tightly fit incore 18, the other ends loosely fit in PTFE (Teflon) friction blocks 21and 22. The friction blocks loosely fit in a transverse bore in core 18.The total length of friction blocks is about 93% of the inside diameter ofstator 10. The speed regulator provides a fairly constant revolution perminute at regular load or no load and at smaller or higher vacuum.The power transmission converts a turbine's power from high speed to lowspeed for a cutting mechanism. The output shaft 15 drives a steel orstainless steel disc 23 through friction between them. The friction isgenerated by a force of a compressed spring 24, transmitted throughsupport plate 25, through ball bearing 26 to a disc 23.The cutting mechanism receives the power to operate through the rotatingdisc 23, rivoted to the end of shaft 27. The shaft is embedded in sleevebearing 28. The sleeve bearing 28 and the ball bearing 26 are tightlyfitted in support plate 25 which is spaced and fastened to stationarycutting blade 29. The stationary cutting blade 29 has an opening 29A. Theother end of shaft 27 ends in a smaller diameter pin with parallel axis tothe shaft's to form an eccentric. An eccentric actuate the mobile cuttingblade 30 through sleeve bearing 31. The bearing 31 is loosely fitted inthe mobile cutting blade 30. The motion of a cutting blade 30 iscontrolled by a stationary guide pin 32 in a slot 30A of a mobil cuttingblade 30. The result is a wobbling-reciprocating motion. The guide pin 32is anchored in a stationary cutting blade 29 and a support plate 25. Amobile cutting blade 30 is pressed against a stationary cutting blade 29by a U shape spring 33. There are 6 of them, one shown for clearity. Theyare spaced from each other to provide evenly distributed pressure on thecutting edges of a mobil cutting blade 30. Length, gauge, location arecarefully selected to provide the proper pressure. The springs are make ofpiano wire.One of a set of spacers is shown in FIG. 1. A spacer 34 is in its place tolimit the length of hair to be cut. It is the distance from the tip ofspacer 34 to a mobile cutting blade 30. Spacer 34 is slidingly connectedto flow chamber 35.OperationA cycle of cutting action is illustrated in FIG. 5 to FIG. 8. The figuresare bottom view of a cutting blade mechanism. In FIG. 5 an eccentric is ina 9 o'clock position. The opening of a stationary cutting blade is fullyopen, no cutting action, ready to accept a portion of hair to be cut. Bymoving to position of FIG. 6 a 12 o'clock position about half of thesucked in hair is cut by the inner edge of a mobile cutting blade and theinner edge of a stationary cutting blade like a pair of scissors. Bymoving to position of FIG. 7 a 3 o'clock position the rest of hair is cutby the inner edge of a mobile cutting blade and the inner edge of astationary cutting blade. The opening on a stationary cutting blade isfully open, no cutting action, ready to accept a second portion of hair tobe cut. By moving to position of FIG. 8 a 6 o'clock position the outeredge of a mobile cutting blade and the outer edge of a stationary cuttingblade cut about half of the sucked in hair. By moving to position of FIG.5 a 9 o'clock position the rest of sucked in hair is cut, completing acycle.* * * * * Today In HistoryApril 25, 1961Robert Noyce was granted a patent for a semi-conductor device-and-lead structure. Home | Browse by Inventor | Browse by Date | Resources | Contact Us© 2004-6 PatentStorm LLC. 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