Male dry shaver

Patent metadata

Field	Value
Publication number	US-9833915-B2
Application number	US-201414220204-A
Country	US
Kind code	B2
Filing date	Mar 20, 2014
Priority date	Mar 27, 2013
Publication date	Dec 5, 2017
Grant date	Dec 5, 2017

Abstract

An electrically driven shaver comprises a housing and at least one hair cutting element that is driven by an electromotor. A thermoelectric skin cooling element and the electromotor are electrically operable by a microcontroller and an on/off switch which is electrically connected with the microcontroller. The microcontroller is adapted to activate and deactivate operation of both the electromotor and the skin cooling element. The skin cooling element is located adjacent to the hair cutting element. The microcontroller is adapted to immediately deactivate operation of the electromotor and relative to that to deactivate operation of the skin cooling element at later point of time, both in response to the “off” actuation of the same on/off switch.

First claim

What is claimed is:

1. An electrically driven shaver, comprising
a) a housing
b) at least one hair cutting element attached to said housing, wherein said at least one hair cutting element that is driven by an electromotor contained within said housing,
c) a thermoelectric skin cooling element attached to said housing;
d) a microcontroller, and
e) a single on/off switch,
wherein said on/off switch is connected to said microcontroller, wherein said microcontroller is electronically connected to said electromotor and said skin cooling element,
wherein said skin cooling element is located adjacent to the hair cutting element,
wherein actuating said single on/off switch into an off position deactivates the electromotor,
wherein the skin cooling element is then deactivated by said actuation of said single on/off switch into said off position after a predetermined delay period after said single on/off switch is turned off.

2. The shaver according to claim 1 , wherein said microcontroller is adapted to immediately deactivate operation of said electromotor.

3. The shaver according to claim 1 , wherein said predetermined delay period of time is of at least 20 seconds and no more than 5 minutes.

4. The shaver according to claim 1 , wherein said predetermined delay period of time is of at least 40 seconds and no more than 3 minutes.

5. The shaver according to claim 1 , wherein in response to said actuation of said single on/off switch into said off position said microcontroller is adapted to operate the skin cooling element with reduced cooling effect after operation of the electromotor is deactivated and before the skin cooling element is deactivated.

6. The shaver according to claim 5 , wherein the microcontroller operates the skin cooling element with full cooling effect during the electromotor is activated and allows shaving and wherein in response to said actuation of said single on/off switch into said off position, said microcontroller is adapted to operate the skin cooling element with less than 50% of the full cooling effect after operation of the electromotor is deactivated and before the skin cooling element is deactivated.

7. The shaver according to claim 1 , wherein said microcontroller is adapted to operate said skin cooling element in accordance with a signal indicative for the temperature of the skin cooling element is received in response to said actuation of said single on/off switch into said off position.

8. The shaver according to claim 1 , wherein the skin cooling element comprises a thermoelectric element that is coupled with a passive cooling mass on a first side thereof and wherein said passive cooling mass is located adjacent the hair cutting element and provided with a free end skin contact section.

9. The shaver according to claim 1 , wherein the skin cooling element comprises a thermoelectric element that is coupled with a heat sink on a second side thereof and wherein said heat sink being provided inside of the housing.

10. The shaver according to claim 1 , wherein the microcontroller is adapted to cool the skin cooling element for a period of time that is based on at least one of: stored values of an empirical look-up-table and/or on the measured values of the Seebeck voltage at a thermocouple of the skin cooling element and/or the measured temperature of the passive cooling mass and/or the ambient temperature measured and/or the measured temperature of the heat sink.

11. The shaver according to claim 1 , wherein the microcontroller is adapted to actuate the skin cooling element for said predetermined delay period of time after said single on/off switch is turned off if the electromotor was operated for longer than 1 minute before the on/off switch is turned off.

Assignees

• Braun Gmbh (A German Corporation)
• Braun Gmbh

Inventors

• Burghardt Renata
• Laschinski Gerd
• Langsdorf Jan Christian
• Kappes Diana
• Georgescu Sonja

Classifications

• B26B19/388

  Sensors; Control · CPC title

• B26B19/3873 Primary

  Electric features; Charging; Computing devices · CPC title

• Y10T83/041

  By heating or cooling · CPC title

• B26B19/382

  Built-in accessories · CPC title