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US Patent: 4,054,075
Shear mechanism
Patentee:
Jim Dvorak (exact or similar names) - Cosmos, MN

USPTO Classifications:
83/633, 83/639.7

Tool Categories:
metalworking machines : metal shearing machines

Assignees:
None

Manufacturer:
Uni-Hydro Inc. - Cosmos, MN
Dynamic Specialties - Cosmos, MN

Witnesses:
Unknown

Patent Dates:
Applied: Nov. 17, 1976
Granted: Oct. 18, 1977

Patent Pictures:
USPTO (New site tip)
Google Patents
Report data errors or omissions to steward Jeff Joslin
Vintage Machinery entry for Uni-Hydro Inc.
Description:
This patent improves on the inventor's previous patent 3,899,950 which "has proved to be highly successful. Even though my patented shear has performed admirably, it still requires a number of moving parts and its cost, while less than most comparable prior art devices, has presented a challenge to provide a shear mechanism that will be even less expensive... Briefly, my invention comprises two upstanding fixed plates having a movable plate sandwiched therebetween. The several plates each have a notch extending inwardly from one edge, one fixed plate having a detachable "

This shear was manufactured by the Dvorak family, which eventually organized as Dynamic Specialties, which became Uni-Hydro Inc.

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