Patent ID: 7080942

Claim:
A bimetal thermometer comprising a cup-shaped gas filled casing which has a bottom wall and supports a window at its edge opposed to the bottom wall, a casing carrier to which the bottom wall is attached, a protective gas filled tube having a free closed end and being connected to the casing carrier at its other end, and a bimetal helix arranged inside the protective tube and attached with its first end to the free end of the protective tube, wherein a dial and a pointer which is fastened to a pointer shaft are arranged inside the casing, and a bearing assembly wherein the pointer shaft is rotatably journaled, said pointer shaft extending through the bearing assembly and casing carrier and being connected to a second end of the bimetal helix such that a temperature-dependent rotation of the second end of the bimetal helix causes a rotation of the pointer shaft, wherein the improvement comprises that the bearing assembly has a cavity through which the pointer shaft extends, said bearing assembly including a bushing and a closure element defining said cavity and that the cavity is filled with lubricating grease.