US 11,752,648 B2
Blade assembly having entrapped spring
Edwin A. Werner, Union Grove, WI (US)
Assigned to Andis Company, Sturtevant, WI (US)
Filed by Andis Company, Sturtevant, WI (US)
Filed on Apr. 20, 2021, as Appl. No. 17/235,398.
Application 17/235,398 is a continuation of application No. 16/381,340, filed on Apr. 11, 2019, granted, now 11,014,253.
Application 16/381,340 is a continuation in part of application No. 15/683,265, filed on Aug. 22, 2017, granted, now 10,322,517.
Application 15/683,265 is a continuation of application No. 14/489,159, filed on Sep. 17, 2014, granted, now 9,770,836.
Prior Publication US 2021/0237290 A1, Aug. 5, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. B26B 19/06 (2006.01); B26B 19/20 (2006.01); B26B 19/38 (2006.01)
CPC B26B 19/06 (2013.01) [B26B 19/063 (2013.01); B26B 19/205 (2013.01); B26B 19/3846 (2013.01)] 13 Claims
OG exemplary drawing
1. A blade assembly for a hair cutting apparatus comprising:
a first blade having teeth extending along a first blade edge;
a second blade having teeth extending along a second blade edge parallel to the first blade edge, a distance between the first blade edge and the second blade edge defining a blade gap;
a yoke coupled to the second blade, the yoke converts motion of a drive into reciprocation of the second blade relative to the first blade;
a spring comprising:
a free end;
a spring arm extending from the free end, the spring arm biasing the second blade towards the first blade;
an arcuate-shaped fixed end extending from the spring arm;
a securing arm extending from the arcuate-shaped fixed end; and
a retainer comprising an arch and an arched tunnel that together interface against the spring to trap the spring against the first blade;
wherein in response to moving the retainer relative to the first blade, the second blade moves relative to the first blade.