ICE SHAVER

• US 3,679,140 A
• Filed: 07/09/1970
• Issued: 07/25/1972
• Est. Priority Date: 07/10/1969
• Status: Expired due to Term

• Current Assignee: Shigeo Sugimoto, Yoshiaki Kaishita
• Original Assignee: Shigeo Sugimoto, Yoshiaki Kaishita
• Inventors: Kaishita, Yoshiaki, Sugimoto, Shigeo
• Primary Examiner(s): Spruill, Robert L.
• Application Number:
  US05/053,380
• Time in Patent Office: 747 Days
• Field of Search: 241/95,168,274,276,DIG.17 146/113,125,164,165
• US Class Current: 241/95
• CPC Class Codes: B26D 1/00 Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
• CPC Class Codes: B26D 1/02 having a stationary cutting member B26D1/547 takes precedence
• CPC Class Codes: Y10S 241/17 Ice crushers

Abstract

A device for making shavings of ice by rotating a chunk of ice on the bottom of a cylindrical container so as to shave the ice with a knife fixed to a holder at the bottom. The ice shaver has a rotary shaft provided with a screw-threaded portion and adapted to drive an ice pressing disk for rotating a chunk of ice in engagement therewith while pushing the disk downward, with a half nut being disposed in a rotary shaft supporting portion, and an operation lever for causing the half nut to engage with or disengage from the threaded portion of the rotary shaft.

Claims

1. In an ice shaver comprising a cylindrical container having a bottom and an upper edge, a cover detachably fixed to the upper edge, a knife holder disposed at the bottom and having a knife, said knife having a cutting edge is positioned along a radial line and projected upward, a rotary shaft extending vertically through the center of the cover and supported on said cover in vertically movable manner, a handle attached to the shaft for rotating said rotary shaft manually, and an ice pressing disk fixed to the lower end of said rotary shaft for catching and rotating a chunk of ice placed in said container, the improvement comprising a screw-threaded portion on said rotary shaft for permitting said rotary shaft to move downward at a rate suitable for said knife to shave the chunk of ice, said cover having a rotary shaft supporting portion, a half nut located in said rotary shaft supporting portion, said half nut including two complemental parts movable toward each other to engage said screw-threaded portion and away from each other to disengage said screw-threaded portion, each part having an upper surface provided with an arcuate groove, and an operation lever for moving said parts toward or away from each other, said lever having two pins positioned symmetrically with respect to said shaft, with a pin being positioned in each arcuate groove so upon movement of the lever in one direction the pins and grooves coact to cause said parts, to engage with said screw-threaded portion while movement of the lever in a second direction causes the pins and grooves to coact to move said parts away from each other to disengage said screw-threaded portion.

2. The ice shaver as claimed in claim 1 including a plate spring for elastically pressing said half nut downward mounted in said rotary shaft supporting portion and bearing upon said operation lever.

3. The ice shaver as claimed in claim 1 including a spring located within said rotary shaft supporting portion bearing against a face of each part remote from the rotary shaft for urging said half nut toward said rotary shaft.

4. The ice shaver as claimed in claim 1 wherein said rotary shaft is provided at an upper portion with a straight smooth portion having a slightly smaller diameter than the diameter of the grooves of its threaded portion.

5. The ice shaver as claimed in claim 1 including a spring cooperable with the operation lever for sensing the direction of movement of said operation lever in the manner of a click stop.