Patent US4378434A successfully refreshed from Google Patents.
US4469934A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrically heated hair curling brush with selectively rotatable handle
Assignee: Panasonic Electric Works Co Ltd
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Filing: 1983-01-10
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Granted: 1984-09-04
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Expires: 2003-01-10
Abstract
Abstract An electrically heated hair curling brush includes a generally cylindrical elongated handle having an elongated, thermally non-conductive brush support rotatably mounted within the handle and axially extending therefrom. An electric PTC heating element is housed within a brush cylinder non-rotatably mounted on the axially extending portion of the brush support. An elastically deformable elliptical locking ring within the handle surrounds the brush support and has a protrusion on the inner surface of each of its long sides engageable in recesses formed in the confronting surface of the brush support to lock the handle and brush support together so as to prevent relative rotation therebetween. A manually depressible button on one of the short sides of the locking ring projects through an opening in the handle. Selective manual depression of the button causes the long side of the locking ring to radially outwardly deflect thereby disengaging the projections from the recesses, and allowing rotation of the handle relative to the brush support. The lead wires for the heating element extend through the brush support to a connection block at the end of the support within the handle and are connected to a rotary connector thereon for rotary attachment to an electric power supply cord.
Inventors
- 👤 Saburo Isshiki
- 👤 Yoshinori Abura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:32
CPC Classifications
A; A45; A45D; A45D1/00; A45D1/02; A45D1/04; A45D1/06; A45D1/10; A45D2001/008
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
155 words
A rotating brush cylinder hair curler comprising: a generally cylindrical elongated handle; an elongated brush support rotatably mounted within said handle and axially extending therefrom; a brush cylinder non-rotatably mounted on the axial extension of said brush support; an electric heating means housed within said brush cylinder; means for locking the brush cylinder and handle to prevent rotation therebetween, comprising: an elastically deformable eliptical ring surrounding the brush support and housed within the handle, said ring having at least one first engagement means on its inner surface; at least one corresponding second engagement means on the confronting surface of the brush support portion within said eliptical ring and normally engaged with said first engagement means; means selectively operable for deforming said eliptical ring toward a circular shape so as to disengage said first and second engagement means so as to permit the handle to rotate freely in relation to the brush cylinder and brush support.
Claim 2
Dependent Claim
155 words
A rotating brush cylinder hair curler comprising: a generally cylindrical elongated handle; an elongated brush support rotatably mounted within said handle and axially extending therefrom; a brush cylinder non-rotatably mounted on the axial extension of said brush support; an electric heating means housed within said brush cylinder; means for locking the brush cylinder and handle to prevent rotation therebetween, comprising: an elastically deformable eliptical ring surrounding the brush support and housed within the handle, said ring having at least one first engagement means on its inner surface; at least one corresponding second engagement means on the confronting surface of the brush support portion within said eliptical ring and normally engaged with said first engagement means; means selectively operable for deforming said eliptical ring toward a circular shape so as to disengage said first and second engagement means so as to permit the handle to rotate freely in relation to the brush cylinder and brush support.
Claim 3
Dependent Claim
26 words
The hair curler of claim 1 in which the elongated brush support has an axial bore therethrough for housing lead wires for the electric heating means.
Claim 4
Dependent Claim
48 words
The hair curler of claim 1 in which the handle is formed of a pair of semi-cylindrical members and the elongated brush support is rotatably mounted within the handle by at least two bearing, the axial distance between said bearings being approximately the width of a human hand.
Claim 5
Dependent Claim
18 words
The hair curler of claim 1 in which the elongated brush support is made of a thermal nonconductor.
Claim 6
Dependent Claim
44 words
The hair curler of claim 2 including a connection block at the end of the elongated brush support within the handle and electrically connected to said lead wires; rotary connection means on said connection block for rotary attachment of an electric supply cord thereto.
Claim 7
Dependent Claim
194 words
A rotating brush cylinder hair curler comprising: a generally cylindrical elongated handle; an elongated brush support rotatably mounted within said handle and axially extending therefrom; a brush cylinder non-rotatably mounted on the axial extension of said brush support; an electric heating means housed within said brush cylinder; means for locking the brush cylinder and handle to prevent rotation therebetween, comprising: an elastically deformable eliptical ring surrounding the brush support and housed within the handle, said ring having at least one protrusion along the inner surface of one of its long sides; at least one recess in the confronting surface of the brush support portion within said eliptical ring, said protrusion normally engaging said recess; a manually depressible release button on one of the short sides of said locking ring and projecting through an opening in said handle; a space radially outwardly of the long sides of said eliptical locking ring so that upon depression of said release button at least one long side will deflect radially outwardly to disengage said protrusion from said recess and said protrusion will return to said recess due to the elasticity of the ring, upon release of said button.
Claim 8
Dependent Claim
194 words
A rotating brush cylinder hair curler comprising: a generally cylindrical elongated handle; an elongated brush support rotatably mounted within said handle and axially extending therefrom; a brush cylinder non-rotatably mounted on the axial extension of said brush support; an electric heating means housed within said brush cylinder; means for locking the brush cylinder and handle to prevent rotation therebetween, comprising: an elastically deformable eliptical ring surrounding the brush support and housed within the handle, said ring having at least one protrusion along the inner surface of one of its long sides; at least one recess in the confronting surface of the brush support portion within said eliptical ring, said protrusion normally engaging said recess; a manually depressible release button on one of the short sides of said locking ring and projecting through an opening in said handle; a space radially outwardly of the long sides of said eliptical locking ring so that upon depression of said release button at least one long side will deflect radially outwardly to disengage said protrusion from said recess and said protrusion will return to said recess due to the elasticity of the ring, upon release of said button.
Claim 9
Dependent Claim
26 words
The hair curler of claim 6, in which the elongated brush support has an axial bore therethrough for housing lead wires for the electric heating means.
Claim 10
Dependent Claim
48 words
The hair curler of claim 6, in which the handle is formed of a pair of semi-cylindrical members and the elongated brush support is rotatably mounted within the handle by at least two bearing, the axial distance between said bearings being approximately the width of a human hand.
Claim 11
Dependent Claim
18 words
The hair curler of claim 6, in which the elongated brush support is made of a thermal nonconductor.
Claim 12
Dependent Claim
44 words
The hair curler of claim 6, including a connection block at the end of the elongated brush support within the handle and electrically connected to said lead wires; rotary connection means on said connection block for rotary attachment of an electric supply cord thereto.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-09-04 | 1988-03-05 | 1988-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-09-04 | 1992-03-05 | 1992-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-09-04 | 1996-03-05 | 1996-09-04 | $7700.00 | Window Closed / Lapsed |