Patent ID: 6253878
Filing Date: 2001-07-03
Classification: B66B

Abstract:
An ergonomically adjustable machine operator platform, which includes:a worker support surface which includes a top surface and a bottom;a plurality of support legs on a floor, wherein each of said support legs includes an external threaded surface portion and wherein at least one of said support legs includes a longitudinally axially extending keyway in said external threaded surface portion, and further includes a stop operably associated with said worker support surface which permits longitudinal axial travel within said keyway between a first and second position to limit vertical movement of said worker support surface and wherein said stop prevents rotational movement of said support leg;a drive member operably connected to each support leg and having an inner threaded bored surface therethrough which is configured to be complimentary threaded to said external threaded surface portion in a manner to permit axial movement along said support leg, and wherein said drive member is disposed in a bearing manner adjacent to said bottom of said worker support surface and wherein said drive member further includes a threaded nut having an exterior sprocket surface attached thereto, said sprocket surface extending generally radially from said drive member;means connected to said external sprocket surface said means including a roller drive chain operably connected to said sprocket surface and a rotatable drive shaft connected to said roller drive chain and a drive motor for rotating said drive member to cause axial movement along said support leg to vertically move said worker support surface; anda travel switch connected to said roller chain drive to limit vertical travel of said worker support surface.