Electric scissors

• US 9,757,869 B1
• Filed: 12/22/2016
• Issued: 09/12/2017
• Est. Priority Date: 12/22/2016
• Status: Active Grant

• Current Assignee: Lawrence Y. Igarashi, Yoshikazu Wada
• Original Assignee: Lawrence Y. Igarashi, Yoshikazu Wada
• Inventors: Wada, Yoshikazu, Igarashi, Lawrence Y
• Primary Examiner(s): Payer, Hwei C
• Application Number:
  US15/388,211
• Time in Patent Office: 264 Days
• Field of Search: 30228
• CPC Class Codes: B26B 15/00 Hand-held shears with motor-driven blades

Abstract

An electric trimming device (100) achieves mechanical advantages by use of a rotational assembly (600) creating an offset rotation used to move a movable blade (350) in a back and forth series of movements. Thus, traditional rotational movement from an electric motor is efficiently translated into a reciprocating scissor type movement. A moveable blade (350) defines a longitudinal void (360) the void used to retain a sliding pin (616) with a scissor blade bearing (618) rotating around the sliding pin. The sliding pin is attached to outer portions a radial rotational plate (610) with an inner portion of the plate attached to an axle of a motor. To achieve a smooth planar movement of the moveable blade the radial rotational plate spins in and out of a guide assembly (700).

Claims

1. An electrically operated device (100) for cutting, the device comprising:

a) an upper casing (200) in fixed attachment to a fixed blade (300), the fixed blade comprising a base section (310) attached to a longitudinal body (315) with the fixed blade defining a fixed blade pivot void (314) and a plurality of attachment voids (312);

b) a moveable blade (350) comprising a longitudinal body section (359) defining a longitudinal void (360), the moveable blade further defining a pivot void (363);

c) an electric motor (500) having a rotational axle attached to a raised axle hub (624) with the raised axle hub attached to a radial rotational plate (610);

d) the radial rotational plate comprising a planar top surface and a planar bottom surface, a radially extending trailing edge (615), a circumferential edge (613) and a radially extending leading edge (614);

e) a sliding pin (616) disposed upon the radial rotational plate, with a scissor blade bearing (618) disposed around the sliding pin;

f) a guide assembly (700) in fixed attachment to the upper casing, the guide assembly defining a horizontal guide void (720);

g) the sliding pin and the scissor blade bearing disposed within the longitudinal void of the moveable blade; and

h) a scissor blade pivot pin (365) disposed within the fixed blade pivot void and the pivot void of the moveable blade.

2. The device of claim 1 further including a spring washer (364) disposed around the scissor blade pivot pin and upon a top side of the moveable blade so as to urge the moveable blade upon the fixed blade.

3. The device of claim 1 further including a positional flag (612) disposed upon the radial rotational plate and a sensor (735) disposed within the guide assembly.

4. The device of claim 3 with a trigger (240) in wired attachment to an electronics board (400) and the electronics board in wired attachment to the motor and the sensor.

5. The device of claim 4 wherein the electronics board includes a sub routine causing the motor to stop with the positional flag aligned with the sensor when the trigger is released.

6. The device of claim 5 with a receptacle (430) for external power attached to the electronics board.

7. The device of claim 6 with an auxiliary power supply (460) attached to the receptacle.

8. The device of claim 5 with a top cover (210) attached to the upper casing and a lower casing (220) attached to the upper casing.