US3832789A - Nestable hair dryer with tensioned positioning - Google Patents

Nestable hair dryer with tensioned positioning Download PDF

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Publication number
US3832789A
US3832789A US00317539A US31753972A US3832789A US 3832789 A US3832789 A US 3832789A US 00317539 A US00317539 A US 00317539A US 31753972 A US31753972 A US 31753972A US 3832789 A US3832789 A US 3832789A
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Prior art keywords
spring
head
assembly
plenum
respect
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US00317539A
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English (en)
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N Bartram
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Conair Corp
Schick Inc
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Schick Inc
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Priority to US00317539A priority Critical patent/US3832789A/en
Priority to AU60629/73A priority patent/AU6062973A/en
Priority to IT70000/73A priority patent/IT999641B/it
Priority to DE19732352556 priority patent/DE2352556A1/de
Priority to NO4205/73A priority patent/NO135733C/no
Priority to CA185,648A priority patent/CA1012757A/en
Priority to NL7315749A priority patent/NL7315749A/xx
Priority to GB5546173A priority patent/GB1443761A/en
Priority to BE138671A priority patent/BE808400A/xx
Priority to FR7344149A priority patent/FR2211193B2/fr
Priority to JP13785773A priority patent/JPS5310503B2/ja
Priority to BR10030/73A priority patent/BR7310030D0/pt
Application granted granted Critical
Publication of US3832789A publication Critical patent/US3832789A/en
Assigned to CONAIR CORPORATION reassignment CONAIR CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: SCHICK INCORPORATED, 33 RIVERSIDE AVE., WESTPORT, CT 06880, A CORP. OF DE
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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
    • A45D20/44—Hair-drying helmets whereon the ventilating means and the heating means are apart from the helmet

Definitions

  • a nestable portable hair dryer which includes a base, a head supporting assembly, and a dryer head'assembly, in which the base and dryer head assembly are pivotally mounted at opposite ends of the head supporting assembly in a hinged Z configuration.
  • the dryer head assembly includes a generally annular air distribution plenum therein for receiving drying air and directing it radially inwardly, and a cover which is movably mounted with respect to the annular plenum.
  • a squirrel cage blower is contained in an impeller housing disposed at the lower end of the head supporting assembly.
  • the dryer includes a head counter-balancing feature comprising a wound coil spring assembly in which the coil is-wound around a post which is fixed .with respect to the head support element.
  • the coiled spring is arranged to permit the free'endwhich is fixedto the other dryer element to be pulled to many positions, to provide constant'tension to keep the dryer hood in any position selected by the user.
  • This tensioning feature provides substantially constant tension to keep the dryer hood in any position selected by the user, and is particularly advantageousin permitting reliable noiseless adjustment of the head between an extreme elevated position and a normal elevated operating position.
  • the present invention relates generally to hair dryers, and more particularly, to those hair dryers having a rigid dryer head assembly which includes portions adapted to surround at least apart of the head of the user, and which are occasionally referred to in the trade as hard hat hair dryers.
  • Such hard hat dryers are'distinguishable from other types of dryers, such as dryers having flexible bags or caps which surround the.
  • head of the user and which include a flexible hose-like conduit extending between the cap and a blower for heated air and from' dryer's of the hand-held type wherein no means is provided for surrounding-any substantial portion of the head of the user.
  • hair dryers of both the hand-heldtype and the flexible cap type have proven acceptable to the trade, it is well known that the hair dryers having rigid drying heads or hood units are superior in use, principally because th eyare silificiently rigid to contain fixed physical structure which serves to directthe air to desired portions of the hair of the user in accordance with a predetermined pattern.
  • hair dryers of the rigid head or hard-hat type have become relatively common home appliances, and have achieved a certain currency because they have been able to be manufactured and sold at reasonable prices.
  • Such dryers are generally designed so as to overcome the drawbacks associated with commercial or heavy duty hair dryers, namely, substantial mass, lack of portability, and the requirement of using substantial amounts of electrical current.
  • a hardhat dryer having a general configuration of a nestable, hinged 2" configuration in which the dryer the respective rings undergo rotation, one relative to the other.
  • the mating engagement under the spring bias prevents the relative rotation of the head assembly and the head mounting assembly from the position selected by the user.
  • the head mounting assembly can be adjustably positioned for use, or can be completely lowered toa nested or storage configuration, as desired, while'still being self-supporting and adjustable'while in the open, in-use configuration.
  • the adjustment was incremental, however, in the sense that it could be held only at those many positions in which ratchet teeth are engaged. Also, the adjustment was accompanied by rather loud clicking as the teeth rode in and out of mating alignment.
  • the dryer disclosed in the aforesaid prior co-pending application was included a novel arrangement of parts providing improved ease of opening and closing and permitting, ready adjustment between a variety of positions used.
  • the pivot assembly means for nested storage configuration.
  • FIG. 1 is a perspective view showing a hinged Z dryer in operating configuration.
  • FIG. 2 is an enlarged cut-away view of the portion of the'dryer of FIG. 1 bridgingthe head support element and the head plenum when these elements are in the FIG. 3 is a fragmentary sectional view taken approximately alongth'e line 3-3 of FIG.- 2.- v
  • FIG. 4 is a view taken along the line 3-3 when the elements are in an open or in-use. configuration as shown in FIG. 1.
  • FIG. 5 is a view taken along the line 5-5 of FIG. 2.
  • FIG. 7 is a side view of a spring mounting bracket.
  • FIG. 8 is a top view of the bracket shown in FIG. 7.
  • FIG. 9 is a plan view of the coiled spring in its lay-
  • FIG. 10 is a side view of the coiled spring FIG. 9. 7
  • FIG. l1 is a side view of the tightly coiled spring in its at-rest configuration.
  • a head assembly which includes a movable mounted cover surrounding a generally annular plenum and an improved air-flow control system is mounted for pivotal movement about a portion of the shown in plenum disposed atop the head mounting unit, thelower portion of which also includes an impeller and mounting unit pivoting relative to the base as well as to the head assembly to permit both the base and the head mounting unit to be received within the head assembly and retained therein.
  • a wound or coiled spring which is in a tightly wound configuration in its at-rest condition is positioned with the coil portion thereof about a post which is fixed to one of the dryers pivoting elements, e.g. to the head mounting assembly, and the outwardly extending or freelend of the spring is fixed with respect to the other element, e;g. to the head assembly, to be pulled or elongated asthe pivoting elements are pivoted with respect to one another'in one direction, and to be retracted or re-coiled as the pivoting elements are pivotedin the other direction.
  • the spring attachments must be made in such a manner as to urge the pivoting elements towards theopen or operating configuration.
  • the post 72 can be fixed with respect to either pivoting element 64, 22,,providing free end 75 of spring 72 is fixedwith respect to the other pivoting element 22, 64, and the direction in which-free end 75 extends causes the pull of the spring to counterbalancethe gravity-induced tendency for the elements to pivot' with respect 'to each other.
  • Post 72 need not be fixed to a bushing 70, but, equivaherein by referencethereto;
  • lent post attached directly to plenum 64 and extending into head assembly 22 could be used providing alignment means serving the similar function to bushing are provided.
  • the free end is pulled farthest, that is, the coil is unwound to the greatest extent when the elements are provided to the nested configuration;
  • the spring is wound to the greatest extent around the post when the unit is pivoted to the operating configuration.
  • FIG. 1 shows a dryer assembly generally designated by the numeral 20 having a head assembly 22 pivotally mounted atop a head mounting assembly 24, the lower portion of which forms an impeller housing 26 received within a base unit 28.
  • the head assembly 22 includes an uppercover or she'll portion 30, and the exterior wall portion-32 of a somewhat-elongated, generally annular, drying air distribution plenum 34 having a plurality of radially'inwardly directed openings 36 therein.
  • plenum '34 can be considered to'be generally annular even though the portion of plenum 34 within head assembly 22has the general shape of letter C,- and the loopof the annulus is closed by horizontally disposed inner plenum 64 at the top of head support assembly 24.
  • the base assembly 28 includes a pair of lugs 3838 having a louvered annular inlet opening 40 for fresh air, and'each having a tray assembly 42 associated therewith for. receiving pins, curlers, or the like.
  • the front wall 44 of the base assembly 28 includes-an edge portion 46 of reduced height, permitting the neck portion 48 of the head mounting assembly '24 to be placed in, various positions with respect thereto.
  • the head assembly 22 is pivotal with respect to headmounting assembly 24, and, as indicated by the double ended arrow identified by the letter B, the headmounting assembly 24 is pivotally movable with respect to base 28.
  • the .pivoting and holding means whereby head support assembly 24 is pivoted with respect to base element 28 and held in a desired position is conventional and can be, for example, as shown in the aforesaid patent application, the discussion and illustration of which is incorporated
  • the dryer unit 20 may be collapsed for storage by pivoting the cover or shell 30 to lower the cover 30 to a position wherein the loweredge 52-closely overlies an inclined upper locating edge 54 formed on .wall 32.
  • Head mounting assembly 24 pivots into the interior of head assembly 22,. and head mounting assembly 24 is also pivoted withrespect to base 28 to reside between legs 38-38so that the bottom 55 of base element 42 is even with the mouth 56 of plenum 34.
  • Handle 62 (see FIG. 3 remains exposed for gripping and carrying the dryer in the collapsed or storage configuratiomBy reason of the design of the principal elements of the dryer 20,the profile presented by the unit 20 in the retracted or collapsed storage configuration thereof is much lower than the profile able to be achieved with dryers of other designs. Nonetheless, the dryer is highly effective by reason of the construction of the plenum 34 and the air flow control assembly.
  • FIG. 2 The details of the pivot assembly in accordance with the preferred embodiment of the present invention are illustrated in FIG. 2.
  • the crosssectional view of FIG. 2 is taken through a portion of the dryer which bridges the head support element 24 and the head assembly 22, and, more particularly, plenum 34.
  • the view shown in FIG. 2 shows portions of these elements in the relative positions encountered when the elements are in the nested or storage configuration.
  • the illustrated bridging pivotassembly generally indicated by the numeral 62 involves the righthand portion of the annular inner plenum 64 at the upper end of head mounting assembly 24, and the right-hand portion 66 of the annular duct or plenum 34 of the head assembly 22 as viewed in FIG. 1.
  • Inner plenum 64 is of the nature of a horizontally disposed tube.
  • annular inner plenum 64 and annular duct 66 concentrically butt at axial ends thereof to provide a continuous conduit 67 for the passage of air therethrough.
  • Bridging between annular inner plenum 64 and annular duct 66' is a strong, rigid bushing 70 of complex shape having spring mounting'spool 72 secured thereto.
  • a wound coil spring 74 is positioned around spool 72 and is retained thereon by keeper flange 73.
  • Bushing 70 is fixed with respect to inner plenum 64.
  • bushing 70 includes axially extending resilient fingers 787'8 having radially outwardly extending detents 808 0 near the ends thereof.
  • Detents 80 are adapted to engage radially inwardly extending'flange 82 in inner plenum 64, securing and fixing bushing 70 axially'with respect to plenum 64.
  • a radially outwardly extending flange 84 engages an axially facing radially inwardly extending annular flange 86 which is integral with annular duct 66.
  • the radially outwardly extending flange 84 in bushing 70 has a wider radius than the opening formed by radially inwardly extending flange 86.
  • the annular flange 86 through which bushing 70 closely passes and which is engaged by radially outwardly extending flange 84 is of integral molded construction and is integral with inside wall 87 and bottom 88. Integral outer wall 32 meets bottom 88 along a parting line 89.
  • An outer wall 32 is formed in a separate molding operation, preferablyintegral with the top portion of conduit 34, and is fitted over the inner wall portion along line 89.
  • FIG. 2 shows outer wall 32 extending rearwardly around the annular duct 66 which is'integral with the inner wall 87 and bottom 88.
  • the parting line 89 is about parallel to the outer wall in the cross-section shown in FIG. 2.
  • FIG. 3 the bridging portion 62 is shownain a cutaway view, and the relationship between FIG. 3 and FIG. 2 can be appreciatedfrom a consideration that FIg. 2 is a cross-sectional view taken approximately along the line 22 in FIG. 3. a It willbe appreciated from a consideration of FIG 3 that a rigid spring mounting bracket 90 is secured at one. end 92 thereof to a bottom wall 88 of head assembly 22 by rivets 94 or other suitable fastening means.
  • FIG. 11 provides a side view of the spring showing the spring in its tightly wound at rest or relaxed configuration.
  • spring 74 has the general config uration of a tightly wound coil, having a free outer end 75 and having a central opening 101 at the center of a tightly wound coil portion 102.
  • Central opening 101 is sized to receive post 74 therein.
  • coil portion 102 of spring 74 is merely positioned around post 72, and free end 75 of spring 74 is secured to keeper 96 of mounting bracket 90 which, in turn, is secured with respect to head mounting assembly 24. Coil portion 102 of spring 74 is not fastened to spool or post 72, and coil 102 is free to rotate in either direction around post 72.
  • Spring winding post 72 being an integral part of bushing ,70, is therefore fixed with respect to bushing 70.
  • Bushing also includes a radially outwardly extending keying boss 103 which extends into a locking notch 104 in head mounting assembly 24 as shown in FIG. 6.
  • spring-winding spool 72 is fixed with re spect to head mounting assembly 24.
  • a dryer assembly in which the inside diameter of the bushing 70 which defines-the outer limits of the conduit 67 in pivot portion 62 which is approximately 2 7% inches, a double spring 74 which is approximately 8 inches long, and wound to provide a tightly wound coil and treated to have an outside diameter of approximately limb and toprovide a 7 7% pound pull is emminently satisfactory.
  • a preferred material from which spring 74 is made is stainless steel strip having high tensil temper and having more than 250,000 PSI minimum tensil strength.
  • spring 72 consists'of two separate layers 107, 108 having a slight arch running their entire length in the elongated direction with the apex of the arch pointing in .the direction which would be radially outwardly when the coil portion 102 is tightly wound. Of course, the arch tends to disappear in that portion 102 which is tightly wound.
  • Layers 107, 108 are secured with respect to each-other adjacent the end thereof such as, for example, by spot welding at points l09l09 (see FIG. 9).
  • spring 74 is tightly wound, shorter layer is inside adjacent portions of layer 107.
  • FIG. 4 it will be appreciated that the elements shown in FIG. 4 are identical to the elements shown in FIG. 3 except that the head mounting assembly 24 and head assembly 22 havebeen pivoted with respectto each other. Consequently; the spring winding post 72 remains fixed with respect to and shown moved with head mounting assembly 24, and is shown pivoted to a position which is closer to keeper 96 which, in turn, is fixed with respect to head assembly 22. The pivoting of head mounting assembly 24 with respect to head assembly 22 thereby permits spring 74 to coil, or perhaps recoil around post 72.
  • spring 74 Since the at-rest or relaxed condition of spring 74 is the tightly coiled configuration, it-will be appreciated that spring 74 resists being pulled to the un-wound configuration shown in FIG. 3 and readily winds itself around spring winding post 72 and urges post 72 towards anchored free end 75. As a practical matter, however,'in the illustrated embodiment, it is the spool or post 72 which is stationary or fixed with respect to the head mounting assembly 24, and it is bracket 90 and particularly end 96 thereof which is urged toward post 72, thus causing head 22 to be urged to the open pivotal position and against the forces of gravity.
  • most of the spring 74 is tightly wound as shown in FIG. 4, and in the closed position shown in FIG. 3, most of the spring 74 is extended.
  • the coiled configuration of spring 74 there is constant urging in the open and closed position.
  • bushing 70 is bilaterally symmetrical around the axially extending plane passing through the broken line identified by the letter C" in FIG. 4. This line passes through the center of spring winding post 72 and through the center of key boss 103.
  • both the right and left sides of plenum 64 are provided with pivot assemblies 62 which are mirror images of each other, although a dryer having the pivot counterbalance mechanism vcomprising bushing 70, post 72 and spring 74 on only one side of the inner plenum 64 is useful, providing spring 72 is'selected from among those springs having sufficient pull to counterbalance the forces of gravity on the particular head assembly.
  • one pair of spring guides 110-110 which extend axially are positioned on one side of the plane C of symmetry, and a second pair 112112 are positioned on the opposite side of the plane.
  • the spring keepers 110-1110 engage the radially inner facing side of spring 74 when the spring 74 is in its extended condition corresponding to the nested configuration of dryer 20, and the other keepers ll2112 would appear to have no function whatsoever. Nonetheless, when an identical bushing 70 is .incorporated into the opposite side at the bridging pivot assembly 63, it will be appreciatedthat it will be the keepers 112-112 which engage spring 74 in the mirror image of that shown in FIGS.- 2, 3 and 4, and keepers 110110 which would appear to have no function. 1
  • spring 74 and particularly free end 75 extends.
  • spring guides 110-110, 112-112 bear against the radially inward face of the extended end 75 of spring 74, keeping spring 74 at a fixed radius from the center, thus keeping the relative direction of the urging at a substantially constant angle, for example, at a right angle, with respect to the pivot radius. While this feature prevents kinking of the spring due to sharp bends at spool 72 by maintaining free end 75, spring 74 along a path having a desired minimum radius, this feature also ensures the characteristic that the urging by the spring will be constant regardless of theangular rotation of the head 22 with respect to the head mounting assembly 24.
  • the spring 74 and spring winding post 72 are positioned within the head assembly 22 adjacent the rear wall 114 and bottom wall 88, and, consequently, the spring 74 and spring winding post 72 have an insignificant effect on the flow of heated air through conduit 67.
  • pivot counterbalancing mechanism comprising bushing 70, post 72, spring 74 in the pivot upstanding element 24 and generally horizontal element 22 can be advantageously adapted to other applications.
  • a hair dryer of the type which includes a head assembly having a defined region for receiving a portion of the head of a user and a C-shaped first portion of an air distribution plenum for directing air onto said defined region, said first portion of said air distribution plenum having axially-aligned annular inlet ports at either end thereof for receiving air under pressure; head support assembly including a generally horizontal second portion of said air distribution plenum and a source of air under'pressure, said second portion of said air distribution plenum commuriicating with said air source and having a pair of horizontally-opposed annular outlet ports axially aligned with respective ones of said annular.
  • coupling means comprising at least one cylindrical bushing extending between adjacent ones of said axially aligned inlet and'outlet ports for bridging the gaps between the inlet ports of said C-shaped first plenum portion and the outlet ports of said second plenum portion to deliver air from said source to said head receiving region, said coupling means establishing a generally horizontally disposed pivot axisbetween said head assembly and said head support assembly coaxial with said inlet and outlet ports;
  • an improved counter-balancing assembly for said head assembly comprising:
  • tension means comprising at least one wound coil spring positioned in a plane perpendicular to said pivot axis;
  • first attachment means for fixing the position of one end of said spring relative to said head assembly
  • said alignment means include spring-guide means fixed with respect to one of said portions of said airdistribution plenum and extending axially into the other portion of said plenum along a path radially inwardly of said constant radius portion of said wound coil spring for engaging a radially inwardly facing portion of said spring to confine said portion of said spring in an arcuate region having said desired constant inner radius with respect to said pivot axis.
  • said bushing extends between said first portion and said second portion of said air distribution plenum, and wherein said bushing has keying means cooperating with one of said plenum portions to fix said bushing with respect to said portion, and wherein said bushing also includes a portion thereof positioned in the other of said plenum portions providing attachment means for one end of said wound coil spring, and wherein said bushing includes rigid guide'means positioned radially inwardly of said spring to engage the radially inward extreme of said spring to maintain at least a portion of the portion of said spring extending between said first and second attachment means in an arcuate path having a minimum desired'radius with respect to the axis of pivot of said head assembly and said head support assembly.
  • a hair dryer of the type which includes a head assembly having a defined region for receiving a portion of the head of a user and a' C-shaped first portion of an air distribution plenum for directing air onto said defined region, said first portion of said air distribution plenum having axially-aligned annular inlet ports at either end thereof for receiving air under pressure;
  • head support assembly including a generally horizontal second portion of said air distribution plenum and a source of air under pressure, said second portion of said air distribution plenum communicating with said air source and having a pair of horizontally-opposed annular outlet ports axially aligned withrespective ones of said annular inlet ports; and 1 j coupling means comprising at least one cylindrical bushing extending between adjacent ones of said axially-aligned inlet and outlet ports for bridging ,the gaps'between the inlet ports of said C-shaped first plenum portion and the outlet ports of said second plenum portion to deliver air from said source to said head receiving region, said coupling means establishing a generally horizontally disposed pivot axis between said head assembly and said head support assembly coaxial with said inlet and outlet ports;-v a an improved counter-balancing assembly for said head assembly comprising: i
  • tension means comprising an elongated strip of spring metal having a tightly wound coil portion with a central opening and a free end portion extending from the periphery of said coil portion, said spring being positioned in a plane perpendicular to said pivot axis adjacent said cylindrical bushing;
  • first attachment means comprising a spring winding post extending through said central opening for fixing the position of said coil portion of said spring relative to one portion of said air distribution plenum
  • alignment means for maintaining said free end portion of said spring positioned in an arcuate path having a desired constant minimum radius with respect to said pivot axis greater than the radius of said cylindrical bushing whereby said spring offers minimal interference to the passage of air through said bushing and whereby the forces generated by said spring at each end thereof are maintained substantially constant and in directions which are at respective substantially constant angles to the respective radii of the points of attachment of said spring within a predetermined range of relative angular positions between said head assembly and said head support assembly to counter-balance said head assembly against the forces of gravity.
  • a hair dryer as defined in claim 6 which further includes spring-guide means comprising at least one axially extending element which is fixed with respect to said one of said portions of said air distribution plenum, and which extends into said other of said portions to a position radially inwardly of said free end portion of said spring, said spring guide means urging said spring into said arcuate path whereby said free end portion has a constant minimum radius 'with respect to the of rotation of said head assembly and said head support assembly.
  • a hair dryer as defined in claim 6 wherein individual cylindrical bushings are provided between adjacent ones of said inlet and outlet ports, wherein said tension means comprise a pair of wound coil strips adjacent each or said bushings, and wherein said attachment means are provided for each of said coil strips.
  • a hair dryer as defined in claim 6. which further includes key means for securing said bushing to one of said plenum portions, and wherein said bushing includes said spring winding post integral therewith, and wherein said bushing also includes axially. extending springguide means extending to a position radially inwardly of said free end of said spring for urging the free end portion of said spring into said arcuate path.
  • a hair dryer comprising, in combination:
  • a head assembly having a defined region for receiving a portion of the head of a user and a C-shaped first portion of an air distribution plenum for directing air onto said defined region, said first portion of said air distribution plenum having axiallyaligned annular inlet ports at eitherend thereof for'receiving air under pressure;
  • a head support assembly including a generally horizontal second portion of said air distribution plenum and a source of air under pressure, said second portion of said air distribution plenum communicating withsaid air source and having a pair of horizontally-opposed annular outlet ports axially aligned with respective ones of said annular intake ports;
  • coupling means comprising at least one cylindrical bushing extendingbetween adjacent ones of said axially-aligned inlet and outlet ports for bridging the gaps between the inlet ports of said C-shaped first plenum portion and the outlet ports of said second plenum portion to deliver air from said source to said head receiving region, said coupling means establishing a generally horizontally disposed pivot axis between said head assembly and said head support assembly coaxial with said inlet and outlet ports;
  • tension means including a'wound coil spring having, in its relaxed position, a tightly wound coil portion having a center opening, and a free end portion extending therefrom, said spring being positioned in a plane perpendicular to said pivot axis;
  • first attachment means including a spring winding post extending through said center opening for fixing the position of said coil portion of said springrelative to one portion of said air distribution plenum;
  • alignment means for maintaining at least a portion of said free end portion of said wound coil spring positioned in an arcuate path having a desired constant minimum radius with respect to said pivot axis whereby said spring offers minimal interference to the passage of air through said bushing and whereby the forces generated by said spring at each end thereof are maintained substantially constant and in directions which are at respective substantially constant angles to the respective radii of the points of attachment of said spring within a predetermined range of relative angular positions between said'head assembly and said head support assembly to counter-balance said head assembly against the forces of gravity.
  • a hair dryer as defined in claim 11 wherein said bushing also includes axially extending spring-guide means positioned radially inwardly of said free end portion of said spring for maintaining said free end portion within an arc having a desired minimum radius regardless of the extent of extension of said spring.
  • a portable hair dryer as defined in claim 12 wherein individual cylindrical bushings are provided between respective ones of said adjacent inlet and outlet ports, and in which said bushings are bilaterally symmetrical with respect to a plane passing axially through said bushings, and wherein said spring mounting post, said spring and said spring attachment means are provided adjacent each of said bushings at opposite sides of said head mounting assembly and are mirror images of each other.
  • a hair dryer having a head support assembly which is upstanding when the dryer is in an operating configuration, and a rigid dryer head assembly which is adapted to receive a portion of the head of a user therein and which is pivotally mounted on said head support assembly for pivoting about a hotizontal axis of pivot, said head support assembly being a first pivotal element and said head assembly being a second pivotal element; said hair dryer further having counterbalancing means for maintaining said head assembly in any desired operating position, saidcounter-balancing means including elongatable tension means having at least two ends, and having the characteristic of exerting a substantially constant tension regardless of extent of the other end of said tension means to the other of said elements, said first and second attachment means being in a common planelperpendicular to the axis of pivot; means for maintaining said tension means in an operating path in which forces generated by the tension meansare maintained directed at each end thereof in directions which are atrespective constant angles with respect to each respective radius from thepivot axis to respective first and second points of attachment regardless of position of
  • said counter-balancing means include: a spring-winding post fixed with respect to one of saidrelements, said post extending parallel to the pivot axis into the other of said elements; a spring formed from anelongated strip of spring metal, said spring, in its relaxed condition, being in the form of a tightly wound coil spring having a coiled portion with a' central opening. and a free end portion extending from" the periphery of the coil portion, said post passing through said central opening of said coil, and said free end of said spring being secured with respect to said other element of said dryer.
  • a hair dryer as defined in claim 16 which further includes spring-guide means comrising an axially extending element which is fixed with respect to said'one of said elements, and which extends into said other, of
  • said spring guide means defining an arcuate operating path for said free end having a constant minimum radius withrespect to said axis'of pivot.
  • aid counter-balancing means include a spring and springguide means, said spring-guide means being fixed with respect to one of said elements and extending axially into the other of said elements substantially parallel with said pivot axis along a path radially inwardly of an extended portion of said spring, and being positioned for engaging a radially inwardly facing portion of said spring for confining said spring in an arcuate region having a desired constant inner radius with respect to said pivot axis.

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  • Cleaning And Drying Hair (AREA)
  • Pivots And Pivotal Connections (AREA)
  • Hair Curling (AREA)
US00317539A 1972-12-22 1972-12-22 Nestable hair dryer with tensioned positioning Expired - Lifetime US3832789A (en)

Priority Applications (12)

Application Number Priority Date Filing Date Title
US00317539A US3832789A (en) 1972-12-22 1972-12-22 Nestable hair dryer with tensioned positioning
AU60629/73A AU6062973A (en) 1972-12-22 1973-09-24 Hair dryers
IT70000/73A IT999641B (it) 1972-12-22 1973-10-11 Asciugacapelli portatile rientra bile
DE19732352556 DE2352556A1 (de) 1972-12-22 1973-10-19 Haartrockengeraet
NO4205/73A NO135733C (pt) 1972-12-22 1973-10-31
CA185,648A CA1012757A (en) 1972-12-22 1973-11-13 Articulated hair dryer with tensioned positioning
NL7315749A NL7315749A (pt) 1972-12-22 1973-11-16
GB5546173A GB1443761A (en) 1972-12-22 1973-11-29 Hair dryer
BE138671A BE808400A (fr) 1972-12-22 1973-12-07 Seche-cheveux repliable avec positionnement sous tension mecanique
FR7344149A FR2211193B2 (pt) 1972-12-22 1973-12-11
JP13785773A JPS5310503B2 (pt) 1972-12-22 1973-12-12
BR10030/73A BR7310030D0 (pt) 1972-12-22 1973-12-20 Secador de cabelos aperfeicoado, e mecanismo pivotavel de contrabalanceamento

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US00317539A US3832789A (en) 1972-12-22 1972-12-22 Nestable hair dryer with tensioned positioning

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US3832789A true US3832789A (en) 1974-09-03

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US00317539A Expired - Lifetime US3832789A (en) 1972-12-22 1972-12-22 Nestable hair dryer with tensioned positioning

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US (1) US3832789A (pt)
JP (1) JPS5310503B2 (pt)
AU (1) AU6062973A (pt)
BE (1) BE808400A (pt)
BR (1) BR7310030D0 (pt)
CA (1) CA1012757A (pt)
DE (1) DE2352556A1 (pt)
FR (1) FR2211193B2 (pt)
GB (1) GB1443761A (pt)
IT (1) IT999641B (pt)
NL (1) NL7315749A (pt)
NO (1) NO135733C (pt)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080216340A1 (en) * 2007-03-08 2008-09-11 John Robert Ruess Apparatus for assisting in fluid removal from fluid storage bladder and the like
US8186075B2 (en) * 2006-05-31 2012-05-29 Joel Beckett Forced air flow electric shoe dryer
US20210219694A1 (en) * 2018-05-31 2021-07-22 Chaoqiang Zhou Child-proof smart blow dryer
US11191316B2 (en) 2017-04-26 2021-12-07 Fend Corp. Collapsible helmet
GB2602325A (en) * 2020-12-23 2022-06-29 Dyson Technology Ltd Haircare appliance

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2395178A (en) * 1943-06-07 1946-02-19 Art Specialty Co Adjustable support structure
US2924411A (en) * 1955-05-19 1960-02-09 Grinnell Corp Counterbalancing mechanism
US3280322A (en) * 1963-05-13 1966-10-18 Kirkeby Eivind Counterbalanced lamp
US3362086A (en) * 1966-05-31 1968-01-09 Gen Electric Hair dryer with selective telescopic adjusting means
US3702031A (en) * 1971-07-07 1972-11-07 Gen Electric Hair dryer hood tilt mechanism
US3713453A (en) * 1971-04-05 1973-01-30 J Chiaro Apparatus for styling hair
US3717936A (en) * 1971-02-26 1973-02-27 Sperry Rand Corp Rigid hair dryer hood
US3731396A (en) * 1972-01-28 1973-05-08 Gec Bridgeport Hair dryer with selective tiltable hood

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2395178A (en) * 1943-06-07 1946-02-19 Art Specialty Co Adjustable support structure
US2924411A (en) * 1955-05-19 1960-02-09 Grinnell Corp Counterbalancing mechanism
US3280322A (en) * 1963-05-13 1966-10-18 Kirkeby Eivind Counterbalanced lamp
US3362086A (en) * 1966-05-31 1968-01-09 Gen Electric Hair dryer with selective telescopic adjusting means
US3717936A (en) * 1971-02-26 1973-02-27 Sperry Rand Corp Rigid hair dryer hood
US3713453A (en) * 1971-04-05 1973-01-30 J Chiaro Apparatus for styling hair
US3702031A (en) * 1971-07-07 1972-11-07 Gen Electric Hair dryer hood tilt mechanism
US3731396A (en) * 1972-01-28 1973-05-08 Gec Bridgeport Hair dryer with selective tiltable hood

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8186075B2 (en) * 2006-05-31 2012-05-29 Joel Beckett Forced air flow electric shoe dryer
US20080216340A1 (en) * 2007-03-08 2008-09-11 John Robert Ruess Apparatus for assisting in fluid removal from fluid storage bladder and the like
US7886459B2 (en) * 2007-03-08 2011-02-15 John R. Ruess Apparatus for assisting in fluid removal from fluid storage bladder and the like
US11191316B2 (en) 2017-04-26 2021-12-07 Fend Corp. Collapsible helmet
US11589634B2 (en) 2017-04-26 2023-02-28 Fend Corp. Collapsible helmet
US20210219694A1 (en) * 2018-05-31 2021-07-22 Chaoqiang Zhou Child-proof smart blow dryer
GB2602325A (en) * 2020-12-23 2022-06-29 Dyson Technology Ltd Haircare appliance
GB2602325B (en) * 2020-12-23 2023-10-11 Dyson Technology Ltd Haircare appliance

Also Published As

Publication number Publication date
FR2211193B2 (pt) 1978-03-17
DE2352556A1 (de) 1974-06-27
GB1443761A (en) 1976-07-28
NL7315749A (pt) 1974-06-25
BE808400A (fr) 1974-03-29
NO135733C (pt) 1977-05-25
JPS4996853A (pt) 1974-09-13
CA1012757A (en) 1977-06-28
FR2211193A2 (pt) 1974-07-19
JPS5310503B2 (pt) 1978-04-14
IT999641B (it) 1976-03-10
NO135733B (pt) 1977-02-14
BR7310030D0 (pt) 1974-09-05
AU6062973A (en) 1975-03-27

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