Electrically heated rotatable curler brush
US4329567A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 27, 1979 |
| Grant date | May 11, 1982 |
| Priority date | — |
| Expiry date | Aug 27, 1999 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA45D1/18
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A lockable rotatable heated curling brush which is used for styling and curling hair includes a rod housing which serves as a handle, an inner tube fixedly connected to said handle and protruding therefrom, a heater inside said inner tube electrically connected to a swivel cord, and an outer tube rotatably supported by said inner tube, said outer tube having a round brush on the outer surface thereof. The outer tube is held in the handle by a circular guide in front which mates with a notched flange at the rear of the outer tube. There is a spring latch device which locks or frees the outer tube so it can rotate. The inner tube within the outer tube is aluminum and is in heat conducting relationship with the heater and the outer tube. The heater is positioned in the inner tube such that the axial center of the heater is forward of the longitudinal center of the inner tube at a point which offsets the unequal heat loss rate to the atmosphere of the forward and rearward ends of the outer tube whereby maximum uniform heating of the outer tube and brush occurs. The preferred heater is a positive temperature coefficient (PTC) thermistor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.