Patent ID: 6769380
Filing Date: 2004-08-03
Classification: E01F,Y10T

Abstract:
A modular marker device comprising:a base member; a first tubular member extending vertically from said base member; additional tubular members extending vertically from said first tubular member; a cap member at the topmost of said tubular members; a fastening and locking arrangement securing said tubular members to said base member and said additional tubular members to each other; an integral vertical slot in said tubular members; a first and second end on said tubular member; an extension on said first end; a shoulder at the junction of said extension with said first end; exterior threads on said extension; one or more longitudinal ribs on said extension adjacent said exterior threads; said second end including an inner periphery; a plurality of lateral teeth on said inner periphery; said teeth including a long surface and a short surface; and interior threads on said inner periphery adjacent said teeth.