US3570348A — Rotary shear

Claim 1

Independent Claim 319 words

In a rotary shear, the combination of a shear frame, a pair of shear drums, with each drum having a longitudinal machined shoulder leading to the drum periphery, and a rest surface diverging from said shoulder, two pairs of opposite end bearings in said frame for rotary support of said drums with their axes in substantial parallelism, companion shear blades, each having opposite front and rear faces and parallel slanting top and bottom surfaces of which the top surface forms with the front face a uniform acute angle throughout and the cutting edge is at the junction of said front face and top surface, with each blade being with its front face and bottom surface located and removably mounted on said shoulder and rest surface of each drum is machined at a slant to said shoulder thereof so that the bottom surface of the associated blade located on said rest surface is also in form fit therewith when said front face of the same blade is located on said shoulder of the drum, whereby on mere relocating and remounting on said shoulder and rest surface of either drum a blade resharpened by uniform machining of its front face, said blade is returned into its former cutting coordination with the blade on the other drum, a drive connection between said drums to maintain their blades in relative angular cut relation with each other in turning said drums, and means for independently adjusting each end bearing of one of said pairs of end bearings in said frame in transverse directions substantially normal to the axis of the drum supported thereby, with one of said directions being to and from the axis of the shear drum supported in the other pair of end bearings, for cutting coordination of said shear blades over their lengths, and means for locking each end bearing of said one pair in any adjusted position to said frame.

Claim 2

Dependent Claim 319 words

In a rotary shear, the combination of a shear frame, a pair of shear drums, with each drum having a longitudinal machined shoulder leading to the drum periphery, and a rest surface diverging from said shoulder, two pairs of opposite end bearings in said frame for rotary support of said drums with their axes in substantial parallelism, companion shear blades, each having opposite front and rear faces and parallel slanting top and bottom surfaces of which the top surface forms with the front face a uniform acute angle throughout and the cutting edge is at the junction of said front face and top surface, with each blade being with its front face and bottom surface located and removably mounted on said shoulder and rest surface of each drum is machined at a slant to said shoulder thereof so that the bottom surface of the associated blade located on said rest surface is also in form fit therewith when said front face of the same blade is located on said shoulder of the drum, whereby on mere relocating and remounting on said shoulder and rest surface of either drum a blade resharpened by uniform machining of its front face, said blade is returned into its former cutting coordination with the blade on the other drum, a drive connection between said drums to maintain their blades in relative angular cut relation with each other in turning said drums, and means for independently adjusting each end bearing of one of said pairs of end bearings in said frame in transverse directions substantially normal to the axis of the drum supported thereby, with one of said directions being to and from the axis of the shear drum supported in the other pair of end bearings, for cutting coordination of said shear blades over their lengths, and means for locking each end bearing of said one pair in any adjusted position to said frame.

Claim 3

Dependent Claim 254 words

The combination in a rotary shear as in claim 1, in which said rest surface of each drum continues rearwardly beyond a blade located thereon and on said drum shoulder, and which further includes removable blade-mounting means providing in each blade longitudinally spaced and alternating first and second holes spaced from the cutting edge, and with their axes extending normal to the front face, of the blade, first and second bolts, and brackets each having diverging first and second legs of which said first leg has an intermediate hole and a finger end, and each drum has in its shoulder and rearwardly continuing rest surface first and second tapped holes, respectively, of which said first tapped holes align with said first holes in the associated blade when the latter is with its front face and bottom surface located on said druM shoulder and rest surface, and said second tapped holes are aligned with said holes in said brackets when said finger ends thereof project into said second holes of the associated blade in its location on said drum shoulder and rest surface, and said second legs thereof rest on said continuing rest surface of the drum, with said first bolts extending with clearance through said first blade holes and being received by a said first tapped holes and tightened to clamp the blade to the drum shoulder, and said second bolts extending through said bracket holes and being received by second tapped holes and tightened for clamping the blade to the drum rest surface.

Claim 4

Dependent Claim 84 words

The combination in a rotary shear as in claim 1, in which the rear face of each blade is parallel to the front face thereof, and each blade has at the junction of said rear face and bottom surface thereof another cutting edge for use of the blade with either cutting edge, and means are provided for removably mounting each blade on its associated drum with either face and surface of the blade located on the shoulder and rest surface, respectively, of the drum.

Claim 5

Dependent Claim 71 words

The combination in a rotary shear as in claim 2 in which the rear face of each blade is parallel to the front face thereof, each blade has at the junction of said rear face and bottom surface thereof another cutting edge for use of the blade with either cutting edge, and at least said first ones of said holes in each blade are equally spaced from said cutting edges thereof.

Claim 6

Dependent Claim 225 words

In a rotary shear, the combination with a shear frame, a pair of upper and lower shear drums with companion shear blades thereon, and a drive connection between said drums to maintain their blades in relative angular cut relation in turning said drums, of two pairs of opposite ends end bearings for rotary support of said drums with their axes lying substantially in a common plane and in substantial parallelism with each other, of which the end bearings of the upper drum are firmly mounted in said frame; and independent mounts for the other end bearings of the lower drum, of which each mount provides a pivot mounted in said frame for rotative adjustment therein and extending with its axis spaced from said plane and parallel to the axis of said upper drum, with said pivot having an eccentric formation on which one of said other end bearings is swingable, and a cam interposed between said one end bearing and a part of said frame which is spaced from said pivot and on which said one end bearing rests through intermediation of said cam, and said cam being adjustable to swing said one end bearing to and from the axis of the upper drum, with adjustment of said pivot and cam of each mount being for cutting coordination of the companion blades over their lengths.

Claim 7

Dependent Claim 225 words

In a rotary shear, the combination with a shear frame, a pair of upper and lower shear drums with companion shear blades thereon, and a drive connection between said drums to maintain their blades in relative angular cut relation in turning said drums, of two pairs of opposite ends end bearings for rotary support of said drums with their axes lying substantially in a common plane and in substantial parallelism with each other, of which the end bearings of the upper drum are firmly mounted in said frame; and independent mounts for the other end bearings of the lower drum, of which each mount provides a pivot mounted in said frame for rotative adjustment therein and extending with its axis spaced from said plane and parallel to the axis of said upper drum, with said pivot having an eccentric formation on which one of said other end bearings is swingable, and a cam interposed between said one end bearing and a part of said frame which is spaced from said pivot and on which said one end bearing rests through intermediation of said cam, and said cam being adjustable to swing said one end bearing to and from the axis of the upper drum, with adjustment of said pivot and cam of each mount being for cutting coordination of the companion blades over their lengths.

Claim 8

Dependent Claim 56 words

The combination in a rotary shear as in claim 5, in which said cam of each mount is an eccentric mounted in said one end bearing for rotative adjustability and extending with its axis parallel to said pivot axis, and said frame part is a machined frame surface on which said eccentric rests with its periphery.

Claim 9

Dependent Claim 22 words

The combination in a rotary shear as in claim 1, in which said shoulder on each drum extends helically on the latter.

Claim 10

Dependent Claim 219 words

In a rotary shear, the combination of a shear frame, a pair of shear drums with companion shear blades thereon, a drive connection between said drums to maintain their blades in relative angular cut relation in turning said drums, two pairs of opposite end bearings for rotary support of said drums with their axes lying substantially in a common plane and in substantial parallelism with each other, of which the end bearings of one pair are firmly mounted in said frame, and independent mounts for the end bearings of the other pair, providing a pair of pivots mounted in said frame for adjustment to and from said plane and extending with their axes spaced from said plane and parallel to the axis of the drum supported in said one pair of end bearings, with the end bearings of said other pair beIng swingable on said pivots, respectively, and a pair of supports on which rest the end bearings, respectively, of said other pair at a distance from their respective pivots, said supports being independently adjustable to swing the end bearings resting thereon to and from the axis of the drums supported in said one pair of end bearings, and adjustment of the pivot and support of each mount being for cutting coordination of the companion blades over their lengths.

Claim 11

Dependent Claim 219 words

In a rotary shear, the combination of a shear frame, a pair of shear drums with companion shear blades thereon, a drive connection between said drums to maintain their blades in relative angular cut relation in turning said drums, two pairs of opposite end bearings for rotary support of said drums with their axes lying substantially in a common plane and in substantial parallelism with each other, of which the end bearings of one pair are firmly mounted in said frame, and independent mounts for the end bearings of the other pair, providing a pair of pivots mounted in said frame for adjustment to and from said plane and extending with their axes spaced from said plane and parallel to the axis of the drum supported in said one pair of end bearings, with the end bearings of said other pair beIng swingable on said pivots, respectively, and a pair of supports on which rest the end bearings, respectively, of said other pair at a distance from their respective pivots, said supports being independently adjustable to swing the end bearings resting thereon to and from the axis of the drums supported in said one pair of end bearings, and adjustment of the pivot and support of each mount being for cutting coordination of the companion blades over their lengths.

Claim 12

Dependent Claim 80 words

The combination in a rotary shear as in claim 8, in which each blade has a front a face and a top surface, with the cutting edge being at the junction of said front face and top surface, and each drum has a machined uninterrupted shoulder leading to the drum periphery and longitudinally extending helically of the drum throughout its length, with each face being with its front face located and removably mounted on said shoulder of the associated drum.

Claim 13

Dependent Claim 29 words

The combination in a rotary shear as in claim 9, in which both blades have the same hard steel cutting edges for cutting soft and hard stock, including metal.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1974-03-15	1974-09-14	1975-03-16	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1978-03-15	1978-09-14	1979-03-16	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1982-03-15	1982-09-14	1983-03-16	$7700.00	Window Closed / Lapsed

Rotary shear

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