US 12,145,284 B2
Blade set, hair cutting appliance, and related manufacturing method
Fransiscus Hermannus Feijen, Leeuwarden (NL); Siegfried Sablatschan, Ferlach (AT); Geert Veenstra, Boornbergum (NL); Wouter Van Kempen, Sappemeer (NL); Jacob Willem Kroon, Leeuwarden (NL); and Albert Jan Aitink, Drachten (NL)
Assigned to KONINKLIJKE PHILIPS N.V., Eindhoven (NL)
Filed by KONINKLIJKE PHILIPS N.V., Eindhoven (NL)
Filed on Mar. 14, 2022, as Appl. No. 17/694,075.
Application 16/999,433 is a division of application No. 15/301,428, granted, now 10,751,891, issued on Aug. 25, 2020, previously published as PCT/EP2015/058486, filed on Apr. 20, 2015.
Application 17/694,075 is a continuation of application No. 16/999,433, filed on Aug. 21, 2020, granted, now 11,279,052.
Claims priority of application No. 14165283 (EP), filed on Apr. 18, 2014.
Prior Publication US 2022/0193938 A1, Jun. 23, 2022
Int. Cl. B26B 19/38 (2006.01); B26B 19/06 (2006.01)
CPC B26B 19/3846 (2013.01) [B26B 19/06 (2013.01); B26B 19/3893 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A blade set arranged to be moved through hair in a moving direction to cut the hair, the blade set comprising:
a stationary blade comprising:
a first wall portion, the first wall portion being arranged to serve as a skin facing wall when in operation, the first wall portion comprising a foil shaving region, the foil shaving region comprising a perforated section having a plurality of perforations;
a second wall portion comprising protruding contact surfaces protruding toward the first wall portion, two inclined portions inclining away from the first wall portion, and a central portion interposed between the two inclined portions, wherein the two inclined portions extend along a lateral length of the second wall portion, wherein the two inclined portions and the central portion jointly extend across a longitudinal length of the first wall portion to define a guide slot between the second wall portion and the first wall portion, and wherein the guide slot includes gaps defined by the protruding contact surfaces, respectively; and
a pair of toothed leading edges longitudinally offset from each other, each toothed leading edge of the pair of toothed leading edges comprising a plurality of teeth, wherein the first wall portion and the second wall portion connect at the plurality of teeth, wherein the foil shaving region is arranged between the pair of toothed leading edges; and
a movable cutter blade comprising a pair of toothed leading edges longitudinally offset from each other, the movable cutter blade further comprising a perforated section having a plurality of perforations, wherein the plurality of perforations of the movable cutter blade are arranged between the pair of toothed leading edges of the movable cutter blade,
wherein the gaps of the guide slot are configured to provide a narrowest part of the guide slot, the gaps defining a height dimension of clearance for the movable cutter blade in the guide slot,
wherein upon relative motion between the movable cutter blade and the stationary blade:
the pair of toothed leading edges of the movable cutter blade cooperates with the pair of toothed leading edges of the stationary blade to provide a peripheral cutting region and cut the hair caught between the pair of toothed leading edges of the movable cutter blade and the pair of toothed leading edges of the stationary blade in a cutting action,
the plurality of perforations of the movable cutter blade cooperate with the plurality of perforations of the stationary blade to cut the hair caught between the plurality of perforations of the movable cutter blade and the plurality of perforations of the stationary blade in the cutting action, and
the movable cutter blade and the first wall portion are biased against one another to provide an areal surface contact between the movable cutter blade and the first wall portion, such that the peripheral cutting region and the foil shaving region jointly contribute to the cutting action during operation.