Patent ID: 6256895
Filing Date: 2001-07-10
Classification: G01C

Abstract:
A laser leveling assembly to establish height locations at selected locations, and adapted for use at a location where there is a lower upwardly facing support surface and an upper downwardly facing bearing surface, such as a building structure having a floor support surface and an upper bearing surface, such as an upper section of a doorway, a ceiling or an upper panel or member, said assembly comprising:a) a laser instrument to transmit a horizontally directed laser beam at laterally spaced locations to indicate a selected elevation or elevations at such spaced locations;b) a mounting post having a longitudinal axis and comprising:i. a lower contact end portion arranged to engage said lower support surface to establish a lower mounting location for said post;ii. an upper contact end portion arranged to engage said upper bearing surface to establish an upper mounting location for said post so that the post can be positioned between the upper and lower locations so as to have a substantial vertical alignment component;iii. said mounting post providing a guideway extending along said longitudinal axis; whereiniv. an effective length of the post is changed to accommodate different distances between the first and second fixed surfaces;c) an instrument mounting device mounted to said post for movement along said guideway to a selected height position or positions, and arranged to support said instrument in an operating position where the instrument can transmit said laser beam toward laterally spaced locations.