Electric shaver

Patent metadata

Field	Value
Publication number	US-11458644-B2
Application number	US-201916364783-A
Country	US
Kind code	B2
Filing date	Mar 26, 2019
Priority date	Mar 29, 2018
Publication date	Oct 4, 2022
Grant date	Oct 4, 2022

Abstract

An electric shaver, comprising an elongated housing receiving an electric motor and/or an electric power source, a working head attached to said housing, wherein said housing includes an elongated base element and a cover element closing said base element and surrounding a connection connecting said electric motor and/or said electric power source to said working head, wherein said cover element is sealed to said base element and/or to said connection by at least one seal.

First claim

The invention claimed is:

1. An electric shaver, comprising:
an elongated inner housing comprising a base element, a first sealing element, a second sealing element, and a cover element closing said base element;
an outer housing surrounding said inner housing;
a shaver head attached to said inner housing; and
a driven shaft extending through an opening in said cover element and rotatorily oscillating about a longitudinal axis of said driven shaft;
wherein said base element comprises a first end surface and said cover element comprises a second end surface, said first and second end surfaces defining an interface between said base and cover elements;
wherein said cover element is sealed to said base element by said first sealing element and to said driven shaft by said second sealing element;
wherein said first and second sealing elements are integrally molded onto said cover element;
wherein said first sealing element forms a sealing ring disposed in said interface that forms an axial seal between said cover element and said base element, wherein said sealing ring comprises a fixedly attached end that is fixedly attached to said cover element and a free end, wherein said sealing ring forms a cone shape with a diameter expanding from said fixedly attached end to an outermost portion of said free end; and
wherein said second sealing element comprises a sealing sleeve, wherein said sealing sleeve is fixedly attached to said cover element at a first end portion of said sealing sleeve and is fixedly attached to said driven shaft at a second end portion of said sealing sleeve to rotatorily oscillate together with said driven shaft, wherein a middle portion of said sealing sleeve is elastically twistable to compensate for rotatory oscillation of said driven shaft relative to said cover element, and wherein said sealing sleeve extends outwardly from said cover element such that said second end portion is spaced apart from said first end portion along said driven shaft.

2. The electric shaver according to claim 1 , further comprising a second sealing ring at the second end portion of said sealing sleeve, wherein said second sealing ring is made from a hard-material component and said sealing sleeve is made from a soft-material component.

3. The electric shaver according to claim 2 , wherein said second sealing ring is made from polyamide and said sealing sleeve is made from silicone.

4. The electric shaver according to claim 1 , wherein said middle portion of said sealing sleeve has a diameter ranging from 110% to 300% of a diameter of said shaft.

5. The electric shaver according to claim 1 , wherein said middle portion of said sealing sleeve has a wall thickness of less than 0.8 mm.

6. The electric shaver according to claim 1 , wherein said inner housing forms a sealed container, said sealed container having a barrel structure and being formed by said base element and said cover element surrounding said shaft and closing said base element, wherein said base element has a length of at least 90% of an entire length of said inner housing.

Assignees

• Braun Gmbh

Inventors

• Erndt Andreas

Classifications

• B26B19/12

  of the oscillating- cutter type; Cutting heads therefor; Cutters therefor (B26B19/04 takes precedence) · CPC title

• B26B19/16

  involving a knife cylinder or a knife cone or separate cutting elements moved like a rotating cylinder or a rotating cone · CPC title

• B26B19/3866 Primary

  Seals or dampers · CPC title