Patent ID: 8051571
Filing Date: 2011-11-08
Classification: B26B,Y10T

Abstract:
1. A hair clipper comprising: a housing; a blade assembly coupled to the housing, the blade assembly movable between an operating position and an open position, the blade assembly including a ridge; an attachment assembly pivotally interconnecting the housing and the blade assembly to enable pivotal movement of the blade assembly with respect to the housing between the operating position and the open position; at least one torsion spring applying a torsional biasing force between the blade assembly and housing to bias the blade assembly toward the open position; a motor supported by the housing, the motor including a motor shaft rotatable about an axis of rotation; a drive element mounted on the motor shaft and engaging the blade assembly when the blade assembly is in the operating position, to drive operation of the blade assembly in response to operation of the motor; and a release mechanism including a hook, the release mechanism being supported for linear displacement in a first direction perpendicular to the motor shaft axis of rotation away from the motor shaft axis of rotation into a hold state and in a second direction perpendicular to the motor shaft axis of rotation toward the motor shaft axis of rotation into a release state; wherein in the hold state, the hook of the release mechanism engages the ridge to hold the blade assembly in the operating position against the torsional biasing force of the torsion spring; wherein upon application of a force exerted by a user on the release mechanism, the release mechanism displaces in the second direction such that the hook moves linearly to the release state to disengage the ridge of the blade assembly; and wherein the blade assembly automatically pivots to the open position, under the influence of the torsional biasing force of the torsion spring, when the hook disengages the ridge.