# US 12,760,772 B2 · Brake device for the realization of laminar packages for electrical use

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- Number: US 12,760,772 B2
- Document ID: US12760772B2
- Status: Granted
- Kind: B2
- Application number: 18/007,828
- Filed: 2021-05-31
- Published: 2023-07-27
- Granted: 2026-10-13
- Earliest claimed: 2020-06-03
- Assignees: Corrada S.p.A.
- Applicants: Corrada S.P.A.
- Inventors: Alberto Curatoli; Davide Verri
- Web page: https://patentgrep.com/patent/US12760772B2

## CPC

- F16D 63/008: {Brakes acting on a linearly moving member}
- B23Q 11/0092: {actuating braking or stopping means}
- F16D: COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- B23Q: DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING (tools of the kind used in lathes or boring machines B23B27/00); MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT

## Abstract

A brake device (10, 10′) for the realization of laminar packages for electrical use defined by the overlapping of magnetic laminations formed by shearing, coupled to a shearing apparatus (13) below a shearing mould (14), with said brake device comprising a brake block (15, 15′), provided with an opening (16, 16′) with a shape corresponding to that of a lamination (12′) and with a size smaller than that of the lamination to define with said lamination an interference (Δ) functional to the packing of the laminations (12′) and comprising mechanical stress compensation means adapted to keep said interference (Δ) constant.

## Claims

### Claim 1

An apparatus for a realization of laminar packages for electrical use defined by an overlapping of magnetic laminations formed by shearing, said apparatus comprising:
a brake device;
a shearing mould, wherein the brake device is positioned below the shearing mould;
said brake device comprises a brake block provided with an opening formed according to an axial direction of movement of a shearing element of the apparatus and with a shape corresponding to that of a lamination sheared by said shearing element;
said brake device has a size smaller than a size of the shearing mould that forms the lamination to define an interference functional to a packing of the laminations; and
the brake device comprises mechanical stress compensation means adapted to keep said interference constant, wherein said mechanical stress compensation means comprise pockets formed outside the opening of the brake block and extended in a thickness of the axial direction of said brake block and along the peripheral edge of the opening.

### Claim 2 (depends on 1)

The apparatus according to claim 1, wherein the pockets are formed in zones of the brake block at stress intensification zones of the lamination corresponding to weakening areas of the shearing element where there is a greater concentration of stresses.

### Claim 3 (depends on 1)

The apparatus according to claim 1, wherein the pockets extend throughout an entirety of the thickness of the brake block.

### Claim 4 (depends on 1)

The apparatus according to claim 1, wherein the pockets form a cavity extending partially into the brake block.

### Claim 5 (depends on 1)

The apparatus according to claim 1, wherein the pockets are axially extended in the thickness of the brake body and are distributed according to a radial direction.

### Claim 6 (depends on 1)

The apparatus according to claim 1, wherein the pockets have an extension in length corresponding to the extension of the stress intensification zones of the lamination.

### Claim 7 (depends on 1)

The apparatus according to claim 1, wherein the brake device comprises at least one of the pockets at each stress intensification zone of the lamination.

### Claim 8 (depends on 1)

The apparatus according to claim 1, wherein the brake block comprises a thin wall or membrane separating the pocket and the opening defining an elastic wall or membrane functional to an expansion of the pockets as a function of deformations of the lamination.

### Claim 9 (depends on 3)

The apparatus according to claim 3, wherein the pockets form elongated slotted openings fully traversing an axial height of the brake device.