Rack-and-Pinion Skewer Handling for Precise Kebab Rotation
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Solution Overview
Problem
Traditional shish kebob skewers are difficult to handle and rotate due to their design, leading to uneven cooking, risk of food falling off, and potential cross-contamination, as well as the need for multiple cooking tools.
Innovation Solution
A hand-held device with a rack and pinion system that securely engages and rotates skewers, combined with an improved skewer design featuring a mating shank and guide rest, allowing for easy pickup, rotation, and orientation of shish kebobs without external tools.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional skewer design with small handle is used, then skewer can be simple and easy to manufacture, but it becomes difficult to grasp securely with heat protective cloth and cannot be rotated easily
Solution Approach 1:
The patent introduces an intermediary device (tongs with skewer engagement mechanism) that mediates between the user's hand and the skewer. This allows secure grasping and rotation of the skewer without directly touching the hot handle, solving the problem of difficult operation with heat protective cloth while maintaining simple skewer design.
Solution Approach 2:
The skewer engagement mechanism on the tongs is designed to automatically engage with the skewer's handle or shaft, allowing the skewer to be secured without complex manual manipulation. The self-adjusting clamping mechanism provides secure grip without requiring complex user actions.
2Reliability
If traditional skewer design is used, then skewer structure remains simple, but food chunks can fall off when trying to grasp larger portion of handle end
Solution Approach 1:
The tongs act as an intermediary that grasps the skewer shaft or handle portion without requiring the user to directly hold the skewer near the food. This eliminates the risk of pushing food off the skewer while providing secure grasping capability through the mechanical advantage of the tong mechanism.
Solution Approach 2:
The skewer is functionally segmented into distinct zones: the food-bearing portion and the handling portion (shaft or handle). This segmentation allows independent optimization - the food portion remains simple while the handling portion can be engaged by specialized tools without affecting food security.
3Manufacturing precision
If traditional skewer design is used, then single tool is required, but skewer cannot be rotated exactly as desired causing uneven cooking
Solution Approach 1:
The tongs serve as a precision intermediary tool that provides controlled rotational movement of the skewer. The mechanical linkage and pivot mechanism of the tongs allow precise angular adjustments, enabling the user to rotate the skewer to exact desired positions for uniform cooking, unlike direct hand manipulation.
4Reliability
If external fork or other implement is used to turn food, then food rotation can be achieved, but cross-contamination risk increases and number of tools becomes unwieldy
Solution Approach 1:
The tong device is designed with multi-functionality, serving both as a grasping tool and a skewer manipulation tool. The specialized skewer engagement mechanism allows the same tool to securely hold and rotate skewers, eliminating the need for separate forks or implements and reducing cross-contamination risk through tool consolidation.
Solution Approach 2:
The patent merges the functions of multiple tools (grasping tool and skewer rotation tool) into a single integrated tong device. This consolidation eliminates the need for multiple separate implements, reducing clutter and cross-contamination risks while maintaining effective cooking capabilities.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables secure handling and precise rotation of shish kebobs, reducing the risk of food loss and cross-contamination, while simplifying the cooking process by eliminating the need for multiple tools.
Implementation Method 1
The pinion travels along a length of the rack when the rod is rotated
Data Source
AI summary
An improved skewer (30 60) and skewer handling device (10) used for manipulating shish kebobs. The improved skewer is comprised of a mating shank (30a) having an array of mating surfaces, such as teeth or grooves, formed into the shank. The handling device is comprised of a pair of opposed handles (10a 10aa) joined by linear actuator (20a 20b) turning a rod (10d) disposed with a skewer engaging means (10e), the mating surfaces of the shank configured to mate with the skewer engaging gear. A shaft (10b) is affixed to the handles at one end and is formed with a guide (10h) at an opposing end, the guide selected to maintain the position of the mating surfaces of the mating shank with the skewer engaging gear. An adaptor (50) is also provided to allow conversion of prior art skewers (52 54) to be used with the handling device (10).