Patent ID: 6131870
Filing Date: 2000-10-17
Classification: A47B

Abstract:
A height adjusting apparatus adapted to mount a working table on a base and comprising:a vertical outer tube having a lower end portion, which is adapted to be fixed on a base;a vertical inner tube having an upper end portion that is adapted to be fixed on a working table, and mounted telescopically on said outer tube, said inner tube further including an internal thread portion;a guiding device for guiding said inner tube to move vertically within said outer tube while preventing rotation of said inner tube relative to said outer tube;said guiding device including a vertical slide slot formed in an outer surface of said inner tube; anda radial bolt mounted fixedly on said outer tube and extending slidably into said slide slot in said inner tube;an externally threaded vertical rod journalled in said outer tube and engaging threadably said internal thread portion of said inner tube;a driving mechanism including a driven bevel gear that is mounted coaxially and fixedly on said vertical rod, and a driving bevel gear, which is mounted rotatably in said outer tube and which meshes with said driven bevel gear, said driving bevel gear rotating about a horizontal axis so as to rotate said vertical rod, thereby moving said inner tube vertically within said outer tube; andan adjusting member mounted rotatably on an outer surface of said outer tube and connected fixedly to said driving bevel gear for driving said driving bevel gear.