Electric knife adapted for safely carving pumpkins and other fruits and vegetables
View Patent ↗According to one embodiment of the present invention, an electric knife is provided that includes a blade that is adapted to cut the pulp and shell of pumpkins and other fruits and vegetables but not readily cut the skin and flesh of humans. According to a preferred embodiment of the present invention, the electric knife also includes a shield that that is adapted to prevent fruit or vegetable matter from entering the housing of the electric knife.
1. An electric pumpkin carving knife comprising:
a housing forming a handle of the knife,
an electric motor in the housing sized and structured
for powering by two to six 1.5V alkaline batteries and
for producing an output of generally between 12,000 and 20,000 revolutions per minute when under no load,
and
a single pumpkin blade, the pumpkin blade being operatively connected to the electric motor so that, when the motor is actuated, the pumpkin blade reciprocates with a blade stroke of between 0.05 inch and 1.5 inches, wherein the pumpkin blade
has generally dull teeth so that the pumpkin blade will readily cut the flesh of a pumpkin but not human skin when the motor is actuated,
is stiff enough to easily puncture the flesh of a pumpkin yet flexible enough to bend while cutting though the flesh of a pumpkin without breaking, and
has a blade height of 0.05 inch to 0.3 inch and a width of 0.01 inch to 0.1 inch to allow the knife to carve intricate designs and elaborate details in the flesh of a pumpkin.
2. The electric pumpkin carving knife of claim 1 , wherein the maximum blade height is 0.2 inch.
3. The electric pumpkin carving knife of claim 2 , wherein the pumpkin blade has a blade height of 0.1 inch to 0.2 inch and a width of 0.02 inch to 0.05 inch.
4. The electric pumpkin carving knife of claim 3 , wherein the dull teeth of the pumpkin blade have a forwardly projecting profile, a pitch of 0.06 inch to 0.18 inch, and a tooth height of 0.02 inch to 0.08 inch.
5. The electric pumpkin carving knife of claim 2 , wherein the dull teeth of the pumpkin blade have a forwardly projecting profile, a pitch of 0.03 inch to 0.2 inch, and a tooth height of 0.01 inch to 0.1 inch.
6. The electric pumpkin carving knife of claim 1 , wherein the housing is elongated and defines a longitudinal direction, and further wherein the pumpkin blade is generally aligned with the longitudinal direction of the housing and operatively connected to the electric motor so that, when the motor is actuated, the pumpkin blade reciprocates in a direction generally along the longitudinal direction of the housing.
7. The electric knife of claim 1 , further comprising a blade mount mounting the pumpkin blade, the blade mount being operatively connected to the motor and mounted in the housing so that, when the motor is actuated, the blade mount reciprocates generally along the longitudinal direction of the housing.
8. The electric knife of claim 1 , wherein the housing defines a generally closed chamber for receiving the electric motor and a blade mount, and further wherein the pumpkin blade passes through an opening in the housing which is small enough to substantially prevent cut pumpkin matter from entering the housing.
9. The electric knife of claim 8 , further comprising a shield attached to and completely surrounding the pumpkin blade, the shield being attached to the pumpkin blade so that it reciprocates along with the pumpkin blade when the motor is actuated, the shield covering the opening in the housing for preventing cut pumpkin matter from entering the housing.
10. The electric knife of claim 1 , wherein the pumpkin blade is generally flat and further wherein the height and width of the pumpkin blade are essentially constant over the portion of the pumpkin blade defining its teeth.
11. The electric knife of claim 10 , wherein at least some of the teeth of the blade are offset from the plane of the blade.
12. The electric knife of claim 1 , further comprising a blade mount operatively connected to the electric motor, the pumpkin blade being permanently mounted on to the blade mount.
13. An electric pumpkin carving knife comprising:
a housing forming a handle of the knife, wherein the housing is elongated and defines a longitudinal direction,
an electric motor in the housing sized and structured
for powering by 2 to 6 1.5V alkaline batteries and
for producing an output of generally between 12,000 and 20,000 revolutions per minute when under no load,
and
a single pumpkin blade, the pumpkin blade being generally aligned with the longitudinal direction of the housing and being operatively connected to the electric motor so that, when the motor is actuated, the pumpkin blade reciprocates with a blade stroke of between 0.1 inch and 0.5 inches, wherein the pumpkin blade
has generally dull teeth so that the pumpkin blade will readily cut the flesh of a pumpkin but not human skin when the motor is actuated, a unsharpened teeth having a forwardly projecting profile, a pitch of 0.06 inch to 0.18 inch, and a tooth height of 0.02 inch to 0.08 inch,
is stiff enough to easily puncture the flesh of a pumpkin yet flexible enough to bend while cutting though the flesh of a pumpkin without breaking, and
has a blade height of 0.05 inch to 0.3 inch and a width of 0.01 inch to 0.1 inch to allow the knife to carve intricate designs and elaborate details in the flesh of a pumpkin.