US 12,270,159 B2
Swing boom concrete screeding apparatus
Peter A. Ligman, Darien, WI (US)
Assigned to Ligchine International Corporation, Floyds Knobs, IN (US)
Filed by Ligchine International Corporation, Floyds Knobs, IN (US)
Filed on Mar. 29, 2024, as Appl. No. 18/621,923.
Application 18/621,923 is a continuation of application No. 18/322,962, filed on May 24, 2023, granted, now 11,946,208.
Application 18/322,962 is a continuation of application No. 17/678,706, filed on Feb. 23, 2022.
Claims priority of provisional application 63/152,728, filed on Feb. 23, 2021.
Prior Publication US 2024/0240415 A1, Jul. 18, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. E01C 19/40 (2006.01); E01C 19/42 (2006.01)
CPC E01C 19/42 (2013.01) 17 Claims
OG exemplary drawing
 
1. An apparatus for screeding concrete to produce a level finished surface comprising:
a frame assembly having a front end and rear ends, said frame assembly having a pair of spaced vertically oriented stabilization legs secured to the front end thereof, said spaced legs supporting a generally horizontal front member therebetween, and at least one stabilization leg secured to the rear end thereof;
an extendable boom assembly having front and rear ends, and an exterior boom section secured to said frame assembly proximate said rear end thereof and to a screed head at said front end, said extendable boom assembly adjustably mounted on said front member; and
an actuator secured between said front member and said extendable boom assembly to impart generally lateral motion thereto.