Hand tool for chopping ice
View Patent ↗An ice chopper having a blade for initially engaging ice with a small force followed by an impact of a larger force to break up the ice. The ice chopper has a tube for a handle having a second tube inside with a compression spring. The second tube has a blade attached, which engages ice and pushes the second tube up inside the tube simultaneously compressing the compression spring. When a stop is reached the second tube stops retracting and the impact force of the downward movement of the tube is absorbed by the blade for breaking the ice. The ice chopper is then lifted off the ice, the compression spring pushes the second tube and the blade downward and the ice chopper is ready for another stroke. An ergonomic handgrip is attached at the top of the tube for gripping the ice chopper.
1. An ice-chopping tool comprising:
a tube having an inner diameter, a proximal end and a distal end, a pair of brackets attached to the distal end of the tube, the brackets being on a diameter of the tube,
a first plate attached to the brackets, the plane of the first plate being parallel to the axis of the tube,
a pair of apertures in the first plate,
a second plate having a bottom edge perpendicular to the axis of the tube, the second plate having a pair of slots parallel to the axis of the tube, the slots slideably connected to the first plate by fasteners passing through the slots and the apertures in the first plate, the second plate in the same plane as the brackets,
a second tube attached to the second plate with the second plate extending from the diameter of the tube, the tube having an outer diameter which is smaller than the inner diameter of the tube, wherein the second tube fits into and slides inside of the tube such that the second plate moves relative to the first plate when the second tube moves relative to the tube,
a slot in the first plate to allow a space for the second tube to slide up and down in the tube,
a pair of slanted contact walls on the second plate for coming into contact with the brackets to stop the upward movement of the second plate,
a fastener passing through the tube walls,
a compression spring engaging the fastener and the second tube such that when the second tube moves upward in the tube the spring compresses, the upward motion of the second plate relative to the first plate is limited by contact between the second plate and the brackets to provide an impact on the second plate in contact with ice to crack the ice.
2. An ice-chopping tool as in claim 1 having,
a hand grip attached at the proximal end of the tube to promote use by easier handing.
3. An ice-chopping tool as in claim 1 having,
the bottom edge of the second plate has a wedge to form a sharp edge for cutting into the ice.
4. An ice-chopping tool as in claim 1 wherein,
a washer between the first plate and the second plate, on the projections, separates the first plate from the second plate to decrease friction between the plates.
5. An ice-chopping tool as in claim 1 wherein, the washers are lubricated washers.