Hair clipper bladeset with variable rake angle array tooth geometry

Patent metadata

Field	Value
Publication number	US-12370705-B2
Application number	US-202217931421-A
Country	US
Kind code	B2
Filing date	Sep 12, 2022
Priority date	Sep 14, 2021
Publication date	Jul 29, 2025
Grant date	Jul 29, 2025

Abstract

A bladeset for a hair clipper has a stationary blade with a plurality of stationary blade teeth defined along a stationary blade lateral axis and includes first and second outermost stationary blade teeth. A stationary blade midpoint is defined between the first and second outermost stationary blade teeth. The bladeset also has a moving blade with a plurality of moving blade teeth defined along a moving blade lateral axis and includes first and second outermost moving blade teeth. A moving blade midpoint is defined between the first and second outermost moving blade teeth. Preferably, each of the stationary blade teeth and the moving blade teeth define a rake angle along at least one edge of each tooth, and the rake angles of at least one of the stationary blade teeth and the moving blade teeth change gradually from the corresponding blade midpoint to the corresponding outermost tooth.

First claim

The invention claimed is:

1. A bladeset for a hair clipper, comprising:
a stationary blade having a stationary blade body from which project a plurality of stationary blade teeth defined along a stationary blade lateral axis;
said plurality of stationary blade teeth including first and second outermost stationary blade teeth and a stationary blade midpoint being defined between said first and second outermost stationary blade teeth; and
a moving blade having a moving blade body from which project a plurality of moving blade teeth defined along a moving blade lateral axis;
said plurality of moving blade teeth including first and second outermost moving blade teeth and a moving blade midpoint being defined between said first and second outermost moving blade teeth;
each of said stationary blade teeth and said moving blade teeth defining a rake angle along at least one edge of each said tooth;
said rake angles of at least one of said plurality of stationary blade teeth and said plurality of moving blade teeth changing gradually from said corresponding blade midpoint to said corresponding outermost tooth.

2. The bladeset of claim 1 , wherein said rake angles of at least one of said plurality of stationary blade teeth and said plurality of moving blade teeth gradually increase from said corresponding blade midpoint to said corresponding outermost tooth.

3. The bladeset of claim 1 , wherein said rake angles of both of said plurality of stationary blade teeth and said plurality of moving blade teeth gradually increase from said corresponding blade midpoint to said corresponding outermost tooth.

4. The bladeset of claim 2 , wherein said rake angles range between 0-30 degrees.

5. The bladeset of claim 3 , wherein said rake angles range between 0-30 degrees.

6. The bladeset of claim 1 , wherein each of said plurality of stationary blade teeth and said plurality of moving blade teeth defining a second rake angle along a second edge of each said tooth, said second rake angles of at least one of said plurality of stationary blade teeth and said plurality of moving blade teeth changing gradually from said corresponding blade midpoint to said corresponding outermost tooth.

7. The bladeset of claim 6 , wherein said second rake angles of at least one of said plurality of stationary blade teeth and said plurality of moving blade teeth gradually decrease from said corresponding blade midpoint to said corresponding outermost tooth.

8. The bladeset of claim 1 , wherein each of said plurality of stationary blade teeth and said plurality of moving blade teeth defining a second rake angle along a second edge of each said tooth, said second rake angles of at least one of said plurality of stationary blade teeth and said plurality of moving blade teeth remaining constant from said corresponding blade midpoint to said corresponding outermost tooth.

9. A bladeset for a hair clipper, comprising:
a stationary blade having a stationary blade body from which project a plurality of stationary blade teeth defined along a stationary blade lateral axis;
said plurality of stationary blade teeth including first and second outermost stationary blade teeth;
the stationary blade lateral axis including a blade midpoint located between said outermost stationary blade teeth, said stationary blade teeth each including an interior edge having an interior rake angle, said stationary blade teeth interior rake angle changing gradually between the blade midpoint and said outermost stationary blade teeth; and
a moving blade having a moving blade body from which project a plurality of moving blade teeth defined along a moving blade lateral axis and being configured for laterally reciprocating relative to said stationary blade for cutting hair therebetween;
said plurality of moving blade teeth including first and second outermost moving blade teeth;
the moving blade lateral axis including a blade midpoint located between said outermost moving blade teeth, said plurality of moving blade teeth including an interior edge having an interior rake angle, said plurality of moving blade teeth interior rake angle changing gradually between the blade midpoint and said outermost stationary blade teeth.

10. The bladeset of claim 9 , wherein said stationary blade teeth interior rake angle of said plurality of stationary blade teeth gradually increases between the blade midpoint and said outermost stationary blade teeth.

11. The bladeset of claim 9 , wherein said plurality of moving blade teeth interior rake angle gradually increases between the blade midpoint and said outermost moving blade teeth.

12. The bladeset of claim 10 , wherein said plurality of stationary blade teeth interior rake angle ranges between 0-30 degrees.

13. The bladeset of claim 11 , wherein said plurality of moving blade teeth interior rake angle ranges between 0-30 degrees.

14. The bladeset of claim 9 , wherein each of said stationary blade teeth of said plurality of stationary blade teeth and each said moving blade teeth of said plurality of moving blade teeth defining an exterior rake angle along an exterior edge opposite said interior edge, said exterior rake angles of at least one of said plurality of stationary blade teeth and said plurality of moving blade teeth changing gradually from said corresponding blade midpoint to said corresponding outermost tooth.

15. The bladeset of claim 14 , wherein said exterior rake angles of at least one of said plurality of stationary blade teeth and said plurality of moving blade teeth gradually decrease from said corresponding blade midpoint to said corresponding outermost tooth.

16. The bladeset of claim 9 , wherein each of said plurality of stationary blade teeth and said plurality of moving blade teeth defining an exterior rake angle along an exterior edge opposite said interior edge, said exterior rake angles of at least one of said plurality of stationary blade teeth and said plurality of moving blade teeth remaining constant from said corresponding blade midpoint to said corresponding outermost tooth.

17. A hair clipper, comprising:
a base structural housing with a bladeset operably secured thereto, said bladeset comprising:
a stationary blade having a stationary blade body from which project a plurality of stationary blade teeth defined along a stationary blade lateral axis;
said plurality of stationary blade teeth including first and second outermost stationary blade teeth and a stationary blade midpoint being defined between said first and second outermost stationary blade teeth; and
a moving blade having a moving blade body from which project a plurality of moving blade teeth defined along a moving blade lateral axis;
said plurality of moving blade teeth including first and second outermost moving blade teeth and a moving blade midpoint being defined between said first and second outermost moving blade teeth;
each of said plurality of stationary blade teeth and said plurality of moving blade teeth defining a rake angle along at least one edge of each said tooth;
said rake angles of at least one of said plurality of stationary blade teeth and said plurality of moving blade teeth changing gradually from said corresponding blade midpoint to said corresponding outermost tooth.

18. The hair clipper of claim 17 , wherein said rake angles of at least one of said plurality of stationary blade teeth and said plurality of moving blade teeth gradually increase from said corresponding blade midpoint to said corresponding outermost tooth.

19. The hair clipper of claim 17 , where

Assignees

• Wahl Clipper Corp

Inventors

• Bushman Christine
• Holmes Michael

Classifications

• B26B19/06

  involving co-operating cutting elements both of which have shearing teeth · CPC title

• B26B19/3846 Primary

  Blades; Cutters (B26B19/044, B26B19/141 take precedence) · CPC title