Hybrid Shaving System

• US 20150314461A1
• Filed: 05/02/2014
• Published: 11/05/2015
• Est. Priority Date: 05/02/2014
• Status: Abandoned Application

• Current Assignee: Raymond Industrial Limited
• Original Assignee: Raymond Industrial Limited
• Inventors: Man Wong, John Ying, Yung Law, Anthony Kowk
• Application Number:
  US14/268,808
• Publication Number:
  US 20150314461A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: B26B 19/042 Long hair cutters or older types comprising a cutting grid
• CPC Class Codes: B26B 19/046 Cutters being movable in the cutting head
• CPC Class Codes: B26B 19/048 Complete cutting head being movable
• CPC Class Codes: B26B 19/06 involving co-operating cutting elements both of which have shearing teeth
• CPC Class Codes: B26B 19/10 involving two or more different types of reciprocating cutting elements, e.g. a pair of toothed shearing elements combined with a pair of perforated cutting elements or a combined toothed and perforated cutting assembly
• CPC Class Codes: B26B 19/384 Dry-shaver foils; Manufacture thereof
• CPC Class Codes: Y10T 29/49828 Progressively advancing of work assembly station or assembled portion of work

Abstract

A cutter for an electric shaver includes an inner cutter having a plurality of inner cutter ribs. Each inner cutter rib may be orientated at a first angle. A frame may be coupled to the inner cutter. An outer cutter may be coupled to the frame and may include a comb portion. The comb portion may include a plurality of outer cutter ribs with each outer cutter rib including a first and second chamfer and a contour disposed therebetween. The contour may gradually slope inwardly from the first and second chamfer to a substantially flat central surface. Each outer cutter rib may be orientated at a second angle that correspondingly oppositely-faces the first angle. The plurality of inner cutter ribs is in operable engagement with the plurality of outer cutter ribs.

Claims

1. A cutter for an electric shaver, the cutter comprising:

an inner cutter having a plurality of inner cutter ribs, each inner cutter rib being orientated at a first angle;

a frame coupled to the inner cutter; and

an outer cutter coupled to the frame, the outer cutter having a comb portion, the comb portion including a plurality of outer cutter ribs, each outer cutter rib including a first and second chamfer and a contour being disposed therebetween, the contour gradually sloping inwardly from the first and second chamfer to a substantially flat central surface, each outer cutter rib being orientated at a second angle, the second angle correspondingly oppositely-facing the first angle, the plurality of inner cutter ribs being in operable engagement with the plurality of outer cutter ribs.

2. The cutter of claim 1, wherein the contour of each outer cutter rib includes at least a first outer cutting edge and each inner cutter rib includes at least a first inner cutting edge.

3. The cutter of claim 2, wherein the at least first outer cutting edge has a first unit of hardness that differs from a second unit of hardness of the at least first inner cutting edge.

4. The cutter of claim 1, wherein the frame further includes a first and a second cutter clip and a channel disposed therebetween.

5. The cutter of claim 4, wherein the inner cutter is joined to a carrier having opposing fingers, the opposing fingers being in operable engagement with the channel.

6. The cutter of claim 5, further including a first spring disposed adjacent to the first cutter clip and a second spring disposed adjacent to the second cutter clip, the first and second springs being operably coupled to the carrier.

7. The cutter of claim 1, wherein each of the outer cutter ribs is equally spaced apart to form an outer cutter slot between adjacent outer cutter ribs.

8. The cutter of claim 1, wherein each outer cutter rib has a first thickness proximate to each of the first and second chamfers and the substantially flat central surface has a second thickness, the first thickness being greater than the second thickness.

9. An electric shaver having an electric motor, the shaver comprising:

a head;

at least a first foil cutter being centrally disposed on the head, the at least first foil cutter having a first height relative to the head;

at least a first and a second linear cutter being disposed on the head, the at least first foil cutter being disposed between the at least first and second linear cutters, each of the at least first and second linear cutters including an inner cutter having a plurality of inner cutter ribs, a frame operably coupled to the inner cutter, and an outer cutter coupled to the frame, the outer cutter having a comb portion, the comb portion including a plurality of outer cutter ribs, each outer cutter rib including a first and second chamfer and a contour being disposed therebetween, the plurality of inner cutter ribs being in operable engagement with the plurality of outer cutter ribs, each of the at least first and second linear cutters having a second height relative to the head, the first height always being greater than the second height.

10. The shaver of claim 9, wherein the contour of each outer cutter rib gradually slopes inwardly from the first and second chamfer to a substantially flat central surface.

11. The shaver of claim 10, wherein the contour of each outer cutter rib includes at least a first outer cutting edge and each inner cutter rib includes at least a first inner cutting edge.

12. The shaver of claim 11, wherein the at least first outer cutting edge has a first unit of hardness that differs from a second unit of hardness of the at least first inner cutting edge.

13. The shaver of claim 9, wherein each inner cutter rib is orientated at a first angle and each outer cutter rib is orientated at a second angle, the second angle correspondingly oppositely-facing the first angle.

14. The shaver of claim 9, wherein each outer cutter rib has a first thickness proximate to each of the first and second chamfers and the substantially flat central surface has a second thickness, the first thickness being greater than the second thickness.

15. The shaver of claim 9, wherein the contour of each outer cutter rib is a flat surface slanting from the second chamfer to the first chamfer.

16. A method of producing a self-sharpening linear cutter for use in an electric shaver, the method comprising:

forming an inner cutter having a plurality of inner cutter ribs, each inner cutter rib orientated at a first angle;

forming an outer cutter with a passage for operatively receiving the inner cutter;

forming a comb portion onto the outer cutter, the comb portion including a plurality of outer cutter ribs, each outer cutter rib including a first and a second chamfer and a contour being disposed therebetween, the contour gradually sloping inwardly from the first and second chamfer to a substantially flat central surface, each outer cutter rib being orientated at a second angle, the second angle correspondingly oppositely-facing the first angle; and

orientating the plurality of inner cutter ribs to operably engage the plurality of outer cutter ribs.

17. The method of claim 16, further including forming the plurality of inner cutter ribs and the plurality of outer cutter ribs by a metal stamping process.

18. The method of claim 16, further including forming the contour with at least a first cutting edge of stainless steel coated in titanium.

19. The method of claim 16, further including forming the plurality of inner cutter ribs to have a first unit of hardness that differs from a second unit of hardness of the plurality of outer cutter ribs.

20. The method of claim 16, further including forming each outer cutter rib to have a first thickness proximate to each of the first and second chamfers that is greater than a second thickness of the substantially flat central surface.