US 11,686,114 B2
Power head for powered concrete roller screed
Charles H. Cowie, Fayetteville, AR (US); and Michael Shane Grigg, Springdale, AR (US)
Assigned to Marshalltown Company, Marshalltown, IA (US)
Filed by Marshalltown Company, Marshalltown, IA (US)
Filed on Aug. 6, 2021, as Appl. No. 17/396,358.
Application 17/396,358 is a continuation of application No. 16/577,468, filed on Sep. 20, 2019, granted, now 11,111,681.
Claims priority of provisional application 62/778,793, filed on Dec. 12, 2018.
Prior Publication US 2022/0074216 A1, Mar. 10, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. E01C 19/24 (2006.01); E04G 21/10 (2006.01); E01C 19/29 (2006.01)
CPC E04G 21/10 (2013.01) [E01C 19/24 (2013.01); E01C 19/29 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A power head for a powered concrete roller screed comprising:
a handle;
a driver housing at a distal end of the handle;
a cordless, battery-operated driver received in the driver housing, the cordless, battery-operated driver including a longitudinal axis, a trigger configured to be depressible in a direction generally transverse to the longitudinal axis, and an output shaft having a rotational axis extending generally perpendicular from the longitudinal axis; and
a head actuator including a translatable link extending along the handle, and an eccentric cam operatively connected to the translatable link within the drive housing such that translation of the translation link imparts rotation of the eccentric cam about a rotational axis of the eccentric cam to an actuated position, wherein the eccentric cam is adjacent the trigger of the cordless, battery-operated driver and configured to depress the trigger when the eccentric cam is rotated about its rotational axis to the actuated position.