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US 4,122,740 AGranted
Shear
AssigneeDavy-Loewy Limited
InventorJack Maltby
Life of this patent
Estimating the term…
Abstract
A rolling blade shear has a stationary blade and a movable blade which latter is mounted and driven to roll over the stationary blade. The movable blade is carried by a pair of opposed toggle mechanisms which are pivoted to a supporting frame and to the movable blade and which are coupled together so as to swing together. Guide means on the frame guide one end of the movable blade along a fixed path. The coupled toggle mechanisms are driven by hydraulic piston and cylinder units connected between the frame and the mechanisms.
Claims11
A rolling cut shear having
- (a) a frame;
- (b) a stationary blade carried by said frame;
- (c) a movable blade to cooperate with said stationary blade;
- and
- (d) supporting and driving means for said movable blade, said means comprising:
- (e) a pair of opposed toggle mechanisms which are pivoted to said movable blade at locations spaced along the length of said movable blade, and are pivoted to said frame about axes substantially perpendicular to the length of said stationary blade;
- (f) coupling means between said toggle mechanisms causing said mechanisms to swing together;
- (g) hydraulic drive means operatively coupled to said toggle mechanisms for driving said mechanisms about said pivot axes;
- and
- (h) means for guiding said movable blade,
- (i) the swinging of said toggle mechanisms resulting in said movable blade executing a rolling motion relative to said stationary blade.
8 more elements
A rolling cut shear having
- (a) a frame;
- (b) a stationary blade carried by said frame;
- (c) a movable blade to cooperate with said stationary blade;
- and
- (d) supporting and driving means for said movable blade, said means comprising:
- (e) first and second opposed toggle mechanisms;
- (f) said first toggle mechanism comprising first and second hinged links pivoted respectively to said movable blade adjacent one end and to said frame about first and second pivot axes which are substantially perpendicular to the length of said stationary blade;
- (g) said second toggle mechanism comprising third and fourth hinged links pivoted respectively to said movable blade adjacent the other end thereof and to said frame about third and fourth pivot axes which are substantially perpendicular to the length of said stationary blade;
- (h) said second and fourth pivot axes being fixed in relation to said frame;
- (i) coupling means between said first and second toggle mechanisms causing said mechanisms to swing together about said second and fourth pivot axes;
- (j) hydraulic driving means operatively coupled to said toggle mechanisms for driving said mechanisms about said second and fourth pivot axes;
- and
- (k) means for guiding said movable blade,
- (l) the swinging of said toggle mechanisms resulting in said movable blade executing a rolling motion relative to said stationary blade.
11 more elements
Dependencies are inferred from the claim text.