US 11,701,795 B1
Concrete mold form
Joel A. Whalen, Haslett, TX (US); Taylor A. Slate, Ft Worth, TX (US); Robert N. Mills, N. Richland Hills, TX (US); Glenn R. Prewett, Arlington, TX (US); and Garrett W. Ollmann, Seattle, WA (US)
Assigned to Hamilton Form Company, Ltd., Ft. Worth, TX (US)
Filed by Joel A. Whalen, Haslett, TX (US); Taylor A. Slate, Ft Worth, TX (US); Robert N. Mills, N. Richland Hills, TX (US); Glenn R. Prewett, Arlington, TX (US); and Garrett W. Ollmann, Seattle, WA (US)
Filed on Feb. 17, 2020, as Appl. No. 16/792,334.
Claims priority of provisional application 62/811,555, filed on Feb. 28, 2019.
Claims priority of provisional application 62/811,442, filed on Feb. 27, 2019.
Int. Cl. B28B 7/00 (2006.01); B28B 23/02 (2006.01); B28B 7/24 (2006.01)
CPC B28B 7/0041 (2013.01) [B28B 7/246 (2013.01); B28B 23/02 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A mold form for forming a molded product, comprising:
a first side form;
a plurality of parallel tracks;
a plurality of carriages, each carriage movable along a track, the first side form being supported on the carriages, each carriage having at least one wheel engaging the track and at least one of the carriages having a drive wheel;
a drive mechanism to rotate the drive wheel on the at least one of the carriages to move the carriages and first side form along the tracks between a first, molding position to a second, release position, the drive mechanism including a spring to urge the drive wheel into engagement with the track, the drive mechanism further including a spring guide mounted within the at least one of the carriages, the spring supported within the spring guide, a wheel bracket pivotally mounted to the at least one of the carriages and supporting the drive wheel for rotation, a first spring seat at a first end of the spring, a second spring seat at a second end of the spring, a spring stop at an end of the spring guide engaging the first spring seat and a contact bar engaging the second spring seat and the wheel bracket, the spring acting between the spring stop and the contact bar to pivot the wheel bracket to force the drive wheel into engagement with the track.