A method for the manufacturing of circular washers for locking from blanks, the washer having a central hole, a first side comprising a pattern of radially extending teeth and a second side comprising a pattern of radially extending cams.

The method is especially characterized in the steps of producing a washer blank having an annular shape; introducing the washer blank into a die assembly for forming a closed shaping space by a lower die portion, an opposing upper die portion, a central die portion and a support piece, the central die portion extending through a washer blank central hole; forming the blank to a washer by mutual movement of said lower and upper die portions; opening the closed shaping space to extract the formed washer.

The invention also relates to a device and a washer.

A method for the manufacturing of circular washers for locking from blanks, the washer having a central hole, a first side comprising a pattern of radially extending teeth and a second side comprising a pattern of radially extending cams.

The method is especially characterized in the steps of producing a washer blank having an annular shape; introducing the washer blank into a die assembly for forming a closed shaping space by a lower die portion, an opposing upper die portion, a central die portion and a support piece, the central die portion extending through a washer blank central hole; forming the blank to a washer by mutual movement of said lower and upper die portions; opening the closed shaping space to extract the formed washer.

The invention also relates to a device and a washer.

Provided herein is a load spring washer configured for use with a medical injection device, having a main body having a proximal surface and a distal surface and one or more protrusions extending proximally away from the proximal surface of the main body.

Provided herein is a load spring washer configured for use with a medical injection device, having a main body having a proximal surface and a distal surface and one or more protrusions extending proximally away from the proximal surface of the main body.

A wedge locking washer has a central axis, a central through hole defining an inner peripheral axial surface, an outer peripheral axial surface, a first side surface adapted to face and engage another wedge locking washer. The first side has a pattern of radially extending cams, each cam having a first surface inclined in relation to a central plane of a wedge can locking surface and a second surface. The first and the second surface of each cam meet in a radially extending cam edge and the second surface of a first cam meet the first surface of an adjacent cam in an radially extending inner corner. Each cam has a height h defined between a bottom plane in which the bottom of the inner corner is arranged and a top plane in which the top of the cam edge is arranged.

A wedge locking washer has a central axis, a central through hole defining an inner peripheral axial surface, an outer peripheral axial surface, a first side surface adapted to face and engage another wedge locking washer. The first side has a pattern of radially extending cams, each cam having a first surface inclined in relation to a central plane of a wedge can locking surface and a second surface. The first and the second surface of each cam meet in a radially extending cam edge and the second surface of a first cam meet the first surface of an adjacent cam in an radially extending inner corner. Each cam has a height h defined between a bottom plane in which the bottom of the inner corner is arranged and a top plane in which the top of the cam edge is arranged.

An offset fin manufacturing method for manufacturing offset fins includes a feeding step of feeding a strip plate, a connection forming step of forming a connection in the strip plate, and an offset fin forming step of bending a planar plate portion located between corresponding two of the connections. In the offset fin forming step, each offset fin is formed such that two of top surface portions, which are located at an upstream end and a downstream end, respectively, of the offset fin in a feed direction of the strip plate, are respectively and directly connected to corresponding two of the connections. One of two of lateral surface portions joined to a corresponding one of the two of the top surface portions is not offset, and thereby a length of the corresponding one of the two of the top surface portions measured along a wave continuation direction is increased.

A wedge locking washer has a central axis, a central through hole defining an inner peripheral axial surface, an outer peripheral axial surface, a first side surface adapted to face and engage another wedge locking washer. The first side has a pattern of radially extending cams, each cam having a first surface inclined in relation to a central plane of a wedge can locking surface and a second surface. The first and the second surface of each cam meet in a radially extending cam edge and the second surface of a first cam meet the first surface of an adjacent cam in an radially extending inner corner. Each cam has a height h defined between a bottom plane in which the bottom of the inner corner is arranged and a top plane in which the top of the cam edge is arranged.

A wedge locking washer has a central axis, a central through hole defining an inner peripheral axial surface, an outer peripheral axial surface, a first side surface adapted to face and engage another wedge locking washer. The first side has a pattern of radially extending cams, each cam having a first surface inclined in relation to a central plane of a wedge can locking surface and a second surface. The first and the second surface of each cam meet in a radially extending cam edge and the second surface of a first cam meet the first surface of an adjacent cam in an radially extending inner corner. Each cam has a height h defined between a bottom plane in which the bottom of the inner corner is arranged and a top plane in which the top of the cam edge is arranged.

A method for the manufacturing of circular washers for locking from blanks, the washer having a central hole, a first side comprising a pattern of radially extending teeth and a second side comprising a pattern of radially extending cams.

The method is especially characterized in the steps of producing a washer blank having an annular shape; introducing the washer blank into a die assembly for forming a closed shaping space by a lower die portion, an opposing upper die portion, a central die portion and a support piece, the central die portion extending through a washer blank central hole; forming the blank to a washer by mutual movement of said lower and upper die portions; opening the closed shaping space to extract the formed washer.

The invention also relates to a device and a washer.