Back to results
US 6,983,545 B2Granted
Compass and compass-cutter with ratchet mechanism
AssigneeOlfa Corporation
InventorShoji Okada
Life of this patent
Estimating the term…
Abstract
A manipulator of a compass for drawing a circle or a compass-cutter for cutting an object in circular configuration is provided with a mechanism for transmitting the force from the user's hand only in one direction. With such the construction, a user can smoothly draw a complete circle at 360 degree, or can cut a paper, a cloth and so on in circular configuration, without re-pinching the manipulator during operation, in a manner for a ratchet which is a commercially available tool.
Claims4
A compass-cutter for cutting an object in circular configuration, comprising:
- a first leg with a pointed end for defining a center of a circle,
- a second leg which carries a blade in a plane parallel to a longitudinal axis of the first leg,
- a lateral bar which supports the first leg and the second leg so that an interval length therebetween can be slidably adjusted, and
- a manipulate portion which is slidably supported on the lateral bar between the first leg and the second leg, wherein a user transmits a rotational driving force to cut the object in the circular configuration with the manipulate portion.
1 more element
Dependencies are inferred from the claim text.