Battery-powered carving knife having a rechargeable battery pack

• US 6,976,313 B2
• Filed: 09/13/2002
• Issued: 12/20/2005
• Est. Priority Date: 04/15/2002
• Status: Expired due to Term

• Current Assignee: KDW Company Limited
• Original Assignee: INTERNATIONAL CONCEPTS, INC.
• Inventors: Wong, Steve
• Primary Examiner(s): Peterson, Kenneth E.
• Application Number:
  US10/242,889
• Publication Number:
  US 20030192191A1
• Time in Patent Office: 1,194 Days
• Field of Search: 30392-394, 302/774, 303/69, 305/01, 305/03
• US Class Current: 30/369
• CPC Class Codes: A22C 17/0013 Boards or blocks for cutting or chopping meat
• CPC Class Codes: B23D 49/006 with contiguous, oppositely reciprocating saw blades
• CPC Class Codes: B23D 51/16 of drives or feed mechanisms for straight tools, e.g. saw blades, or bows
• CPC Class Codes: B26B 7/005 Counter reciprocating blades

Abstract

A battery-powered carving knife is shown having a housing and a switch, which connects and disconnects a battery to a motor. A drive mechanism including a worm gear together with a cam member causes reciprocation of reciprocating blade mounts to reciprocate back and forth in an out of phase fashion. The motor is positioned forward within the housing in motor receiving section, with the drive shaft of the motor facing rearwardly. The blade mounts are driven by the motor, and reciprocate in a position below the motor. The motor and blade mounts are positioned in front of a handgrip section, thereby improving the ergonomics of the device. Alternatively, the drive shaft can be positioned facing forward.

Claims

1. An electric carving knife for carving meat or fish, the knife comprising:

a housing having a front motor receiving section and a rear handgrip section, the handgrip section having a reduced cross-section as compared to the front motor receiving section;

a pair of meat-carving knife blades mounted in said housing;

a motor positioned in said front motor receiving section for driving the knife blades, said motor having a drive shaft extending rearwardly generally parallel to said rear handgrip section and said meat-carving knife blades;

reciprocating blade mounts each having a substantially L-shaped configuration including an upstanding foot portion and an elongate leg portion extending substantially beneath said motor, said upstanding foot portions extending up from said elongate leg portions to and at least partially surrounding said drive shaft, said blade mounts being mounted in blade mount guides, said motor predominantly overlapping said guides in the direction of said drive shaft; and

a battery pack positioned predominantly in the reduced cross-section handgrip section, said battery pack comprising a plurality of batteries arranged in series.

2. The electric knife of claim 1, wherein said batteries have substantially the same amperage, wherein said identical amperage can range between 1500 and 2300 ma, to provide multiple battery pack lifetime duration.

3. The electric carving knife of claim 1, further comprising a drive mechanism interconnecting said motor to the knife blades.

4. The electric carving knife of claim 3, wherein said drive mechanism drives the knife blades asymmetrically.

5. The electric knife of claim 4, wherein said drive mechanism comprises a worm gear attached to and driven by said motor drive shaft and a cam member driven by said worm gear, said cam member imparting reciprocating movement to said blade mounts.

6. The electric knife of claim 5, wherein said worm gear is attached to said motor drive shaft and rotates about a longitudinal axis.

7. The electric knife of claim 6, wherein said cam member is comprised of a spur gear meshing with said worm gear, and rotating about an axis transverse with said longitudinal axis.

8. The electric knife of claim 7, wherein said cam member includes cam lobes positioned on opposite side of said spur gear, said cam lobes being eccentric relative to said transverse axis and 180°

out of phase relative to each other.

9. The electric knife of claim 8, wherein said reciprocating blade mounts are each substantially L-shaped to include an upstanding foot portion and an elongate leg portion, said upstanding feet portions having elongate slots which overlap said cam lobes.

10. The electric knife of claim 9, wherein said motor is positioned with said drive shaft extending rearwardly, towards said elongate handle, and said upstanding feet portions extend upwardly towards said motor drive shaft, and said elongate leg portions of said reciprocating blade mounts extend forwardly and include blade mounting sections situated adjacent the forward section of said front motor receiving section, and said front motor receiving section including an access opening, accessing said blade mounting sections.

11. The electric carving knife of claim 1, wherein said batteries are arranged in an elongate stack.

12. The electric carving knife of claim 11, wherein said battery pack is comprised of six batteries, arranged in two stack[s] of three batteries, where each stack of three batteries are configured in a triangular configuration.

13. The electric carving knife of claim 12, wherein said battery pack is at least substantially encapsulated within an insulating covering.

14. The electric carving knife of claim 1, wherein said individual batteries are comprised of Nickel Metal Hydride.

15. The electric carving knife of claim 14, wherein said Nickel Metal Hydride batteries are approximately 1.2 volts each.