US3674980A - Divided flow hairdryer - Google Patents

Divided flow hairdryer Download PDF

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Publication number
US3674980A
US3674980A US727806A US3674980DA US3674980A US 3674980 A US3674980 A US 3674980A US 727806 A US727806 A US 727806A US 3674980D A US3674980D A US 3674980DA US 3674980 A US3674980 A US 3674980A
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US
United States
Prior art keywords
shutter
housing
path
paths
heating element
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US727806A
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English (en)
Inventor
Ernest Francis Cox
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ronson Corp
Original Assignee
Ronson Corp
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Publication date
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Publication of US3674980A publication Critical patent/US3674980A/en
Assigned to NIHON SIBER HEGNER, K.K. reassignment NIHON SIBER HEGNER, K.K. SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: RONSON CORPORATION A CORP OF NJ
Assigned to SECURITY PACIFIC BUSINESS CREDIT INC.,, Lazere Financial Corporation reassignment SECURITY PACIFIC BUSINESS CREDIT INC., SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: RONSON CORPORATION
Assigned to FOOTHILL CAPITAL CORPORATION, A CORP. OF CA reassignment FOOTHILL CAPITAL CORPORATION, A CORP. OF CA SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: RONSON CORPORATION
Anticipated expiration legal-status Critical
Assigned to RONSON CORPORATION reassignment RONSON CORPORATION RELEASE OF SECURITY INTEREST IN PATENTS Assignors: WELLS FARGO FOOTHILL, INC.
Expired - Lifetime legal-status Critical Current

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    • A—HUMAN NECESSITIES
    • A45—HAND OR TRAVELLING ARTICLES
    • A45D—HAIRDRESSING OR SHAVING EQUIPMENT; EQUIPMENT FOR COSMETICS OR COSMETIC TREATMENTS, e.g. FOR MANICURING OR PEDICURING
    • A45D20/00—Hair drying devices; Accessories therefor
    • A45D20/18—Flexible caps with provision for hot air supply

Definitions

  • the air flow regulator is in the form ofa shutter which is larger than the output end of the ⁇ 56' Reerences Cited air flow paths and has an open portion and a solid portion in which the open portion covers one of the paths and the solid U TE S T P EN S portion covers the other in any desired ratio.
  • This invention relates to hairdryers and, in particular, to a hairdryer having a temperature variable output.
  • the primary object of the present invention is to provide an improved hair dryer having a variable temperature output.
  • Another object of the present invention is to provide an improved hairdryer having a variable temperature output which is only slightly more expensive to manufacture than hairdryers not having a variable temperature output feature and less expensive to manufacture than hairdryers employing more sophisticated and costly variable temperature output means.
  • a hairdryer comprising a fan and a heater, the fan being arranged so that air driven thereby is centripitally forced along a deflector wall surrounding the fan and is divided between two paths, both of which terminate at a common output orifice, the air through one path only passing through or by the heater, and a movable shutter common to both paths being provided at the common output orifice, whereby adjustment of the shutter causes the output to comprise air from either path only, or air from both paths as a mixture in a ratio which is infinitely variable.
  • the invention permits infinite variation of output airflow temperature in a hairdryer in a low-cost and safe manner.
  • FIG. I is a plan view, of a hairdryer embodying the present invention.
  • FIG. 2 is a vertical sectional view taken through the plane 22 of the hairdryer shown in FIG. 1.
  • FIGS. 1 and 2 an improved hairdryer according to the present invention is shown which comprises an outer housing 11 comprised of upper and lower mating segments equipped with a lead-in anchor 12 for an electrical supply cable 13 which is capable of connection to an external electrical source, not shown.
  • a motor 14 which has a vertically upwardly extending shaft 15.
  • centrifugal impeller 16 which includes a hub 16a having six straight, radially-extending impeller blades 17, although any convenient number of blades can be employed.
  • Deflector wall 18 shaped like the numeral 9," is positioned around the impeller 16 and arcuately extends along the lower portion of the housing ll, terminating at the output orifice 19 (more clearly shown in FIG. 2). Air is drawn into the hairdryer by the impeller 16 via an input orifice in the housing (not shown) located adjacent the impeller 16 and forced around the interior of the deflector wall 18. Sagittal lines 20 and 21 indicate the flow pattern of air leaving the impeller and show, in a manner to be hereinafter described, how the air is divided into two paths, only one of which includes a heater 22.
  • the heater 22 is housed within an open-ended, box-like assembly, generally indicated by the numeral 23, having side walls 24 and 25.
  • the side walls 24 and 25 are formed from a heat resistant and electrical insulating material for safety purposes and for locally restricting the heating effect of the heater 22.
  • the outer surface 28 of side wall 25 and the lower extending portion of deflector wall 18, in cooperation with the contiguous portions of the top and bottom segments of the housing 11, define the path for the cool air, as indicated by sagittal line 21.
  • a rotatable control knob 30 is used to operate, in known manner, a set of switch contacts, not shown, by which the motor 14 may be energized and the heater 22 connected in circuit.
  • a T-shaped shutter 32 (more clearly shown in FIG. 2) has a leg 33 which is provided with a rack gear 34, and a head 35.
  • the head 35 comprises a sold section and a slotted section.
  • the rack gear 34 engages the pinion 36 carried on and fixed to the shah 31 of the control knob 30. Rotation of the control knob 30 causes the shutter head 35 to move in guides 37 formed in the housing ll.
  • the shutter head 35 itself is large enough to cover the output orifice or exit end of the hot and cold air paths simultaneously and has a number of openings 38 which can be of any desired shape cut in its upper half just below the shutter leg 33.
  • its slotted half is opposite the hot air path, thereby permitting only the flow of heated air from the orifice 19.
  • the shutter 32 carries an extension 39 which is formed from the same sheet as the shutter 32, but is bent so as to extend at a right angle to the plane of the shutter 32.
  • the extension 39 cooperates with an opening 40 in the housing 11 which opening communicates with the path containing the heating element to insure that sutficient air may pass therethrough to prevent overheating when the hot air path is blocked by the solid section of the shutter head 35.
  • the shutter 32 in FIG. 2 is shown in a position in which the hot air path is completely closed so that only cold air is being delivered from the hairdryer. In this position, the opening 40 is not covered by the shutter extension 39 so that, although the heated air no longer exits from the hairdryer at the orifice 19, there is sufficient air passing out to the atmosphere by way of opening 40 to prevent the heater from being damaged.
  • control knob 30 When the control knob 30 is rotated by the user in a clockwise direction, the shutter 32 will be caused to move to the user's left, or downwardly as in FIGS. 1 and 2, progressively closing the cold air path and simultaneously opening the hot air path until finally, at the end of its travel, the cold air path will be closed and the hot air path fully open.
  • the control knob 30 may, of course, be stopped at any point between the two extreme positions so that any ratio of cold to hot air may be available at the output orifice 19 so that effective temperature is similarly variable.
  • the type of hairdryer to which the present invention is par ticularly applicable utilizes a flexible hose which conveys the air from the hairdryer to a hood or hand-held adaptor for drying the hair.
  • the hose in this type of hair dryer acts as a mixing chamber so that the temperature of the drying air is uniform at the intermediate settings of the shutter 32, whereas without the hose there may be a tendency to have an air flow which is stratified at different temperatures.
  • a hairdryer which comprises:
  • a a housing having an input orifice and an output orifice
  • walls mounted within the housing, surrounding the air moving means defining a first and a second path, the paths extending from adjacent the air moving means to adjacent the output orifice;
  • a heating element mounted within one of the paths for heating air passing therethrough;
  • a shutter greater in size than the output orifice end of the paths, movably mounted within the housing in slidable engagement with the output orifice end of the paths and having an open portion and a solid portion;
  • the shutter has a rack gear formed at one end thereof; and the actuating means comprises: 1. a control knob rotatably mounted on the housing having a shaft extending into the housing; and 2. a pinion mounted on the shaft in meshing engagement with the rack gear.
  • the housing has an opening communicating with the path containing the heating element;
  • the shutter has an extension mounted thereupon which seals the opening when the open portion of the shutter covers the path containing the heater element and leaves the opening fully uncovered when the solid portion of the shutter covers the path containing the heating element.
  • the shutter has a rack gear formed at one end thereof;
  • the actuating means comprises:
  • a control knob rotatably mounted on the housing having a shaft extending into the housing;
  • a first side wall mounted within the housing substantially parallel to the tail portion of the deflector wall and extending from adjacent the beginning of the curved portion of the deflector wall to adjacent the output orifice;
  • a hairdryer according to claim 5 wherein: a. the shutter has a rack gear formed at one end thereof; and b. the actuating means comprises;
  • a control knob rotatably mounted on the housing having a shaft extending into the housing;
  • the housing has an opening communicating with the path containing the heating element
  • the shutter has an extension mounted thereupon which seals the opening when the open portion of the shutter covers the path containing the heater element and leaves the opening fully uncovered when the solid portion of the shutter covers the path containing the heating element.
  • the shutter has a rack gear formed at one end thereof;
  • the actuating means comprises:
  • a control knob rotatably mounted on the housing having a shaft extending into the housing;
  • a hairdryer according to claim I which further comprises:
  • the head section of the shutter being of greater size than the output orifice end of the paths and comprising an open portion and a solid portion;
  • leg section of the shutter having a rack gear formed thereupon
  • a control knob rotatably mounted on the housing having a shaft extending into the housing;
  • a pinion mounted on the shaft of the control knob in meshing engagement with the rack gear so that rotation of the control knob will cause the shutter to be slidably and selectively moved from one extreme of its travel to the other extreme or to any intermediate position of travel.
  • the housing has an opening communicating with the path containing the heating element
  • the shutter has an extension mounted thereupon which seals the opening when the open portion of the shutter covers the path containing the heater element and leaves the opening fully uncovered when the solid portion of the shutter covers the path containing the heating element.

Landscapes

  • Cleaning And Drying Hair (AREA)
  • Hair Curling (AREA)
US727806A 1967-05-09 1968-05-09 Divided flow hairdryer Expired - Lifetime US3674980A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB21585/67A GB1223107A (en) 1967-05-09 1967-05-09 Improved hairdryer

Publications (1)

Publication Number Publication Date
US3674980A true US3674980A (en) 1972-07-04

Family

ID=10165387

Family Applications (1)

Application Number Title Priority Date Filing Date
US727806A Expired - Lifetime US3674980A (en) 1967-05-09 1968-05-09 Divided flow hairdryer

Country Status (7)

Country Link
US (1) US3674980A (xx)
DE (1) DE1757436C2 (xx)
DK (1) DK123742B (xx)
FR (1) FR1563456A (xx)
GB (1) GB1223107A (xx)
NO (1) NO119550B (xx)
SE (1) SE335209B (xx)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4218608A (en) * 1978-08-07 1980-08-19 Maroney Michael V Multiple duct blow dryer and hair styler
US4230932A (en) * 1977-09-05 1980-10-28 Hitachi, Ltd. Blowers for drying video tape recorders
US4297564A (en) * 1978-11-29 1981-10-27 Bartolac Robert R Hair dryer
US4316077A (en) * 1975-12-31 1982-02-16 Texas Instruments Incorporated Elastic hair dryer having selectively variable air output temperature
US4644135A (en) * 1983-08-29 1987-02-17 The Marley Company Wall mounted forced air electric heater
US5109313A (en) * 1988-12-05 1992-04-28 Staar S.A. Drying cassette for recorder/player units
WO1999053250A1 (en) * 1998-04-16 1999-10-21 Excel Dryer Inc. Hand dryer
WO2001025705A1 (en) * 1999-10-04 2001-04-12 Excel Dryer, Inc. Dryer
US6725562B2 (en) * 2001-06-14 2004-04-27 Matsushita Electric Works, Ltd. Hairdryer
US7039301B1 (en) 1999-10-04 2006-05-02 Excel Dryer, Inc. Method and apparatus for hand drying
US20060219389A1 (en) * 2005-04-01 2006-10-05 Ingersoll-Rand Company Air compressor aftercooler
US20080229480A1 (en) * 2007-03-21 2008-09-25 Rose Hardwick Heat deflector for use with a hood-type hair dryer
US20150192324A1 (en) * 2014-01-06 2015-07-09 Nidec Corporation Dryer
US10835007B2 (en) 2017-07-14 2020-11-17 Spectrum Brands, Inc. Hair dryer

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10226658A1 (de) * 2002-06-14 2005-06-30 BSH Bosch und Siemens Hausgeräte GmbH Vorrichtung zur Erzeugung eines temperierten Luftstroms

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1707554A (en) * 1928-02-13 1929-04-02 Halliwell Shelton Electric Cor Hair drier
US1751841A (en) * 1929-02-23 1930-03-25 Art Sly Clothes drier
US2090165A (en) * 1935-03-20 1937-08-17 Eastern Lab Inc Multiple service hair drier or the like
US2914648A (en) * 1957-06-13 1959-11-24 Svenska Flaektfabriken Ab Ventilating unit provided with an electric heater
US3272966A (en) * 1963-06-20 1966-09-13 Dominion Electric Corp Device for drying hair and fingernails
US3290112A (en) * 1965-03-09 1966-12-06 Hagen B Gillenwater Apparatus for dispensing insecticides
US3394755A (en) * 1967-02-06 1968-07-30 Conditionaire Australia Pty Lt Air screen creating-air conditioning apparatus

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL129978C (xx) * 1960-07-01
DE1945288U (de) * 1966-07-07 1966-09-01 Siegas Metallwarenfab Haartrockenhaube.

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1707554A (en) * 1928-02-13 1929-04-02 Halliwell Shelton Electric Cor Hair drier
US1751841A (en) * 1929-02-23 1930-03-25 Art Sly Clothes drier
US2090165A (en) * 1935-03-20 1937-08-17 Eastern Lab Inc Multiple service hair drier or the like
US2914648A (en) * 1957-06-13 1959-11-24 Svenska Flaektfabriken Ab Ventilating unit provided with an electric heater
US3272966A (en) * 1963-06-20 1966-09-13 Dominion Electric Corp Device for drying hair and fingernails
US3290112A (en) * 1965-03-09 1966-12-06 Hagen B Gillenwater Apparatus for dispensing insecticides
US3394755A (en) * 1967-02-06 1968-07-30 Conditionaire Australia Pty Lt Air screen creating-air conditioning apparatus

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4316077A (en) * 1975-12-31 1982-02-16 Texas Instruments Incorporated Elastic hair dryer having selectively variable air output temperature
US4230932A (en) * 1977-09-05 1980-10-28 Hitachi, Ltd. Blowers for drying video tape recorders
US4218608A (en) * 1978-08-07 1980-08-19 Maroney Michael V Multiple duct blow dryer and hair styler
US4297564A (en) * 1978-11-29 1981-10-27 Bartolac Robert R Hair dryer
US4644135A (en) * 1983-08-29 1987-02-17 The Marley Company Wall mounted forced air electric heater
US5109313A (en) * 1988-12-05 1992-04-28 Staar S.A. Drying cassette for recorder/player units
WO1999053250A1 (en) * 1998-04-16 1999-10-21 Excel Dryer Inc. Hand dryer
US6038786A (en) * 1998-04-16 2000-03-21 Excel Dryer Inc. Hand dryer
WO2001025705A1 (en) * 1999-10-04 2001-04-12 Excel Dryer, Inc. Dryer
US7039301B1 (en) 1999-10-04 2006-05-02 Excel Dryer, Inc. Method and apparatus for hand drying
US6725562B2 (en) * 2001-06-14 2004-04-27 Matsushita Electric Works, Ltd. Hairdryer
US20060219389A1 (en) * 2005-04-01 2006-10-05 Ingersoll-Rand Company Air compressor aftercooler
US20080229480A1 (en) * 2007-03-21 2008-09-25 Rose Hardwick Heat deflector for use with a hood-type hair dryer
US20150192324A1 (en) * 2014-01-06 2015-07-09 Nidec Corporation Dryer
US9746202B2 (en) * 2014-01-06 2017-08-29 Nidec Corporation Dryer
US10835007B2 (en) 2017-07-14 2020-11-17 Spectrum Brands, Inc. Hair dryer
US11311090B2 (en) 2017-07-14 2022-04-26 Spectrum Brands, Inc. Hair dryer

Also Published As

Publication number Publication date
NO119550B (xx) 1970-06-01
DK123742C (xx) 1975-05-12
DK123742B (da) 1972-07-31
GB1223107A (en) 1971-02-24
FR1563456A (xx) 1969-04-11
SE335209B (xx) 1971-05-17
DE1757436B1 (de) 1975-05-15
DE1757436C2 (de) 1976-01-08

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Legal Events

Date Code Title Description
AS Assignment

Owner name: NIHON SIBER HEGNER, K.K.

Free format text: SECURITY INTEREST;ASSIGNOR:RONSON CORPORATION A CORP OF NJ;REEL/FRAME:004286/0886

Effective date: 19840314

AS Assignment

Owner name: LAZERE FINANCIAL CORPORATION 60 EAST 42ND STREET,

Free format text: SECURITY INTEREST;ASSIGNOR:RONSON CORPORATION;REEL/FRAME:004304/0018

Effective date: 19840516

Owner name: SECURITY PACIFIC BUSINESS CREDIT INC., 228 EAST 45

Free format text: SECURITY INTEREST;ASSIGNOR:RONSON CORPORATION;REEL/FRAME:004304/0018

Effective date: 19840516

AS Assignment

Owner name: FOOTHILL CAPITAL CORPORATION, A CORP. OF CA, ILLIN

Free format text: SECURITY INTEREST;ASSIGNOR:RONSON CORPORATION;REEL/FRAME:004431/0132

Effective date: 19850614

AS Assignment

Owner name: RONSON CORPORATION, NEW JERSEY

Free format text: RELEASE OF SECURITY INTEREST IN PATENTS;ASSIGNOR:WELLS FARGO FOOTHILL, INC.;REEL/FRAME:022248/0313

Effective date: 20090209