Patent ID: 9227289
Filing Date: 2016-01-05
CPC Classification: B23K,B24B

Claim Text:
1. An upgrade assembly kit for a known device for grinding welding electrodes, the known device having a length and comprising a grinding wheel having a thickness and a diameter and having a grinding surface directed in a first direction, a driving motor and a shaft for driving said grinding wheel in a rotational movement about a rotational axis, a two-portion housing said grinding wheel with a first housing portion and a second housing portion, wherein said first and said second housing portion are connected along a plane, and wherein said grinding wheel is rotated in the range of said plane inside said housing; and wherein openings are formed in said first and second housing portion of said two-portion housing for guiding a welding electrode for grinding in a defined angle and position relative to said grinding wheel, the openings in said first housing portion being angled towards said first grinding wheel, the upgrade assembly kit for coupling to the known device, and comprising: a further grinding wheel adapted to be coupled to the device with the grinding surface directed in a second direction opposite to said first direction of said first grinding wheel, and wherein the openings in said second housing portion are angled towards said second grinding wheel; a spacer ring adapted to be inserted between the first housing portion and the second housing portion, said spacer ring having a diameter corresponding to the diameter of said two-portion housing and a thickness corresponding to the thickness of said grinding wheel to increase said length of said known device by only said thickness of said further grinding wheel when the upgrade assembly kit is coupled, the thickness of the spacer ring thereby compensating for a difference of an axial position of said second grinding surface caused by the further grinding wheel relative to said openings for guiding a welding electrode in order to maintain the grinding angle defined by said openings in said second housing portion, wherein said further grinding wheel is adapted to rotate within said thickness of said spacer ring; and a centering sleeve for centering said further grinding wheel to rotate about the same rotational axis as said grinding wheel, and wherein said centering sleeve has an axial length which is larger than said thickness of one of said grinding wheels.