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US 4,399,730 AGranted
Floating angle knife for metal working machines
OwnerHarry L. Oswalt, Jr.inventor
Life of this patent
Estimating the term…
Abstract
A knife assembly for shearing angle stock has a square, plate-like, floating cutter provided with a pair of opposed, flat, parallel faces, presenting four, stock-engaging corners each having two pairs of cutting edges, permitting eight "settings" used successively as wear, breakage or dulling may require. Four rigid stops and a pair of floating abutments are provided so that during use, regardless of which of two directions the knife tends to rotate when engaging the stock, it is firmly backed up within a cutter-receiving recess formed in a shiftable cutter support.
Claims8
In a shearing machine,
- a stationary cutter blade having a notch for receiving angle stock to be sheared;
- a shiftable support having a recess;
- a quadrilateral cutter plate having a pair of opposed, flat faces and two pairs of peripheral edges, presenting four corners,
- said plate extending into the recess, disposing a first pair of said edges within the recess,
- a second pair of said edges merging toward one of said corners,
- said one corner being disposed exteriorly of the recess,
- said plate being carried by the support for movement of said one corner into and out of engagement with the stock in said notch during shifting of the support;
- a pair of abutments in said recess each engaging a respective one of said first pair of edges for resisting the load to which the plate is subjected when said one corner is moved against the stock,
- said plate and said abutments being rotatable relative to the support in response to movement of said one corner against the stock;
- and
- rigid stop means disposed in said recess for engagement by said first pair of edges for limiting the extent of rotation of the plate relative to the support.
8 more elements
Dependencies are inferred from the claim text.