US 5,970,616 AGranted

Hair trimmer with lighted rotating head

AssigneeWahl Clipper Corporation

InventorsGregory Wahl, Andrew Elston

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Abstract

A hair trimmer that includes a main body extending between an upper end portion and a lower end portion and further includes a front side and a rear side. The main body defines a primary longitudinal axis that extends substantially linearly between the upper end portion and the lower end portion. A blade housing is rotatably attached to the upper end of the main body such that the blade housing is rotatable about the primary longitudinal axis with respect to said main body. The blade housing is defined by an attached side and a free side that is opposite to the attached side. An interface plane is defined between the main body and the blade housing. The interface plane extends at an interface angle that is oblique to the primary longitudinal axis. The present hair trimmer further includes a cutting mechanism that is removably seated upon the said free side of the blade housing. The cutting mechanism includes a cutting surface for engaging and severing hair. As an additional feature, the present hair trimmer may be also equipped with a light for illuminating the area about to be trimmed.

Claims23

Dependent claims

A hair trimmer comprising:

a main body extending between an upper end portion and a lower end portion, said main body defining a primary longitudinal plane extending substantially linearly between said upper end portion and said lower end portion to divide said main body into a front side and a rear side;
a blade housing movably attached to said upper end portion of said main body and defining an attached side and a free side opposite said attached side;
a cutting mechanism seated on said free side of said blade housing and configured to be moved therewith, said cutting mechanism including a substantially planar stationary blade and a substantially planar reciprocating blade arranged in a generally parallel relationship to define a cutting plane therebetween, said stationary blade having a stationary cutting edge and said reciprocating blade having a reciprocating cutting edge, wherein said stationary cutting edge and said reciprocating cutting edge cooperate to form a cutting surface;
and
wherein when said blade housing is moved so that said cutting surface is aligned with said front side, an angle defined between said cutting plane and said primary longitudinal plane is set to a first predetermined angle, and when said blade housing is moved so that said cutting surface is aligned with said rear side, the angle defined between said cutting plane and said primary longitudinal plane is set to a second predetermined angle, where said second predetermined angle is different from said first predetermined angle and said first and second predetermined angles have each been specifically selected for properly aligning the cutting surface with an area of facial hair growth when cutting hair with the grain of natural growth.

2 more elements

A hair trimmer comprising:

a main body extending between an upper end portion and a lower end portion and including a front side and a rear side, said main body defining a primary longitudinal axis extending substantially linearly between said upper end portion and said lower end portion;
a blade housing rotatably attached to said upper end portion of said main body such that said blade housing is rotatable with respect to said main body, said blade housing being defined by an attached side and a free side opposite said attached side;
a cutting mechanism seated on said free side of said blade housing and configured for rotation therewith, said cutting mechanism including a cutting surface for engaging and severing hair;
a light positioned on said blade housing in the vicinity of said cutting mechanism for illuminating a section of hair in position to be cut;
power source for providing power to said light and to said cutting mechanism, said power source being positioned within said main body;
and
a slip ring positioned near an interface between said main body and said relatively rotatable blade housing, said slip ring for conveying power from said power source to said light across said interface.

4 more elements

A hair trimmer comprising:

a main body extending between an upper end portion and a lower end portion and including a front side and a rear side, said main body defining a primary longitudinal axis extending substantially linearly between said upper end portion and said lower end portion;
a blade housing rotatably attached to said upper end portion of said main body such that said blade housing is rotatable with respect to said main body, said blade housing being defined by an attached side and a free side opposite said attached side, wherein an interface plane is defined between said main body and said blade housing, said interface plane extending at an interface angle that is oblique to said primary longitudinal axis;
and
a cutting mechanism seated on said free side of said blade housing, said cutting mechanism including a cutting surface for engaging hair and for severing said hair along a relatively straight line, wherein said cutting mechanism further includes a substantially planar stationary blade and a substantially planar reciprocating blade arranged in a generally parallel relationship to define a cutting plane therebetween, where said cutting surface is defined by cooperating edges of said stationary blade and said reciprocating blade;
and
further wherein said cutting plane and said interface plane define an oblique blade angle therebetween.

3 more elements

Dependencies are inferred from the claim text.