US 12,168,245 B2
Method and apparatus for separating aggregate for a concrete topping slab
Ronald D. Shaw, Costa Mesa, CA (US)
Assigned to Shaw & Sons, Inc., Costa Mesa, CA (US)
Filed by Shaw & Sons, Inc., Costa Mesa, CA (US)
Filed on Oct. 24, 2023, as Appl. No. 18/493,559.
Application 18/493,559 is a continuation of application No. 18/063,520, filed on Dec. 8, 2022, granted, now 11,826,783.
Application 18/063,520 is a continuation of application No. 16/885,051, filed on May 27, 2020, granted, now 11,534,798, issued on Dec. 27, 2022.
Prior Publication US 2024/0058842 A1, Feb. 22, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. B07B 1/34 (2006.01)
CPC B07B 1/343 (2013.01) 11 Claims
OG exemplary drawing
 
1. An apparatus for preparing a finishing mixture from a concrete mixture for use on a concrete surface, the concrete mixture having aggregate, the apparatus comprising:
a wire mesh screen having a plurality of uniformly-sized screen openings;
a guide frame connected to the wire mesh screen, the guide frame having opposing top and bottom frame ends connected by opposing first and second guide frame sides, each guide frame side and the top guide frame end having an inward extending leg on a top surface of the screen and connected to the screen adjacent a periphery of the screen and an upward extending leg extending above the screen adjacent the periphery of the screen, the bottom guide frame end having a central frame opening;
a first funnel member extending over the top surface of the screen and having a top funnel end at the first frame side and a bottom funnel end at a first side of the central frame opening;
a second funnel member extending over the top surface of the screen and having a top funnel end at the second frame side and a bottom funnel end at a second side of the central frame opening;
a powered vibrating unit connected to the frame to vibrate the frame;
at least one bottom support leg connected to one of the bottom end frame or a bottom portion of different ones of the first and second side frames; and
at least one top support leg connected to one of the top end frame or a top portion of different ones of the first and second side frames, with said at least one top support leg being longer than the at least one bottom support leg to incline the screen and frame at an angle from the horizontal.