US3816706A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heating member for a hair dryer
Assignee: Individual
•
Filing: 1973-02-20
•
Granted: 1974-06-11
•
Expires: 1993-02-20
Abstract
Abstract A heating member for a hair dryer or other blower-operated heating appliance, whose wire heating element is disposed in a flow duct formed by a box-shaped frame of insulating panels and comprises a heating wire helically wound on a self-supporting core which is coiled to a diameter corresponding to the distance between opposite panels and is disposed with its transverse axis transverse to the flow direction. The element is attached to the frame only by its terminals which are secured to one of the panels. One embodiment has one such helical coil, while another has two such coils which are located by notches on opposite sides of a central spacer penel. A tapping resistor for the blower motor, and a thermal cut-out, are provided on the panels.
Inventors
- 👤 K Meywald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:28
CPC Classifications
A; A45; A45D; A45D20/00; A45D20/04; A45D20/08; H; H05; H05B; H05B3/00; H05B3/10; H05B3/16
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
114 words
Heating member for blower-operated heating devices comprising box-shaped frame means having a plurality of insulated panels for forming a flow duct, at least one wire heating element mounted in said box-shaped frame means, said wire heating element including self-supporting core means having sufficient intrinsic stability to maintain its shape, a heat resistant insulating stratum provided over said selfsupporting core means, electrical resistance heating wire helically wound on the insulated self-supporting core means, and at least first and second terminal contacts, said wire heating element being provided in a coiled form and being supported in said flow duct with the axis of the coiled form being transverse to the flow direction in said flow duct.
Claim 2
Dependent Claim
114 words
Heating member for blower-operated heating devices comprising box-shaped frame means having a plurality of insulated panels for forming a flow duct, at least one wire heating element mounted in said box-shaped frame means, said wire heating element including self-supporting core means having sufficient intrinsic stability to maintain its shape, a heat resistant insulating stratum provided over said selfsupporting core means, electrical resistance heating wire helically wound on the insulated self-supporting core means, and at least first and second terminal contacts, said wire heating element being provided in a coiled form and being supported in said flow duct with the axis of the coiled form being transverse to the flow direction in said flow duct.
Claim 3
Dependent Claim
26 words
A heating member according to claim 1, wherein said wire heating element is supported in said flow duct only in the zone of said terminal contacts.
Claim 4
Dependent Claim
28 words
A heating member according to claim 2, wherein said terminal contacts are secured to at least one of said plurality of insulating panels of said box-shaped frame means.
Claim 5
Dependent Claim
48 words
A heating member according to claim 1, wherein said plurality of insulating panels include first and second covering panels and two spacer panels secured perpendicularly to said first and second covering panels for spacing said first and second covering panels from one another, thereby forming said flow duct.
Claim 6
Dependent Claim
28 words
A heating member according to claim 4, wherein said first and second covering panels are secured with respect to said two spacer panels by means of metal clips.
Claim 7
Dependent Claim
34 words
A heater member according to claim 4, wherein said coiled form of said wire heating element is a helix having a diameter corresponding to the spacing between said first and second parallel covering panels.
Claim 8
Dependent Claim
17 words
A heater member according to claim 1, wherein said heat resistant insulating stratum is glass fiber silk.
Claim 9
Dependent Claim
36 words
A heater member according to claim 2, wherein thermal switch means are connected to one of said first and second terminal contacts for disconnecting said wire heating element upon the occurrence of a perdetermined temperature excess.
Claim 10
Dependent Claim
25 words
A heating member according to claim 1, wherein said at least one wire heating element includes two helical coiled sections formed in a bifilar configuration.
Claim 11
Dependent Claim
29 words
A heating member according to claim 9, wherein an additional insulating panel is disposed in the diametral plane of said two helical coiled sections for spacing the coil turns.
Claim 12
Dependent Claim
36 words
A heating member according to claim 10, wherein said additional insulating panel is disposed with the plane of the major surfaces of said additional insulating panel being parallel to said flow direction in said flow duct.
Claim 13
Dependent Claim
26 words
A heating member according to claim 10, wherein said additional insulating panel is provided with notches along opposite longitudinal edges for uniformly spacing said coil turns.
Claim 14
Dependent Claim
39 words
A heating member according to claim 10, wherein each of said two helical coiled sections have first and second terminal contacts at opposite ends thereof with said first and second terminal contacts being mounted on said additional insulating panel.
Claim 15
Dependent Claim
26 words
A heating member according to claim 13, wherein a single terminal contact serves as said second terminal contact of each of said two helical coiled sections.
Claim 16
Dependent Claim
28 words
A heating member according to claim 10, wherein a thermal cut-out means is secured on said additional insulating panel within the helices of said two helical coiled sections.
Claim 17
Dependent Claim
60 words
A heating member according to claim 10, wherein said plurality of insulating panels include first and second covering panels and two spacer panels secured perpendicularly to said first and second covering panels for spacing said first and second covering panels from one another, said two spacer panels having recesses to secure said additional insulating panel to said two spacer panels.
Claim 18
Dependent Claim
30 words
A heating member according to claim 16, whereiN connecting leads are passed through said recesses of said two spacer panels and connected to said at least one wire heating element.
Claim 19
Dependent Claim
17 words
A heater member according to claim 1, wherein the heater member is preferably for a hair dryer.
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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) | 1977-06-10 | 1977-12-10 | 1978-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-10 | 1981-12-10 | 1982-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-10 | 1985-12-10 | 1986-06-11 | $7700.00 | Window Closed / Lapsed |