Acoustically matched concrete finishing pans

Road structure – process – or apparatus – Apparatus – Tool rotating in horizontal plane

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

Reexamination Certificate

active

07114876

ABSTRACT:
Pans for power finishing freshly placed concrete in which the acoustic impedance of the treating equipment is made substantially equal to the acoustic impedance of the concrete slab being treated. Preferably, a powered, twin rotor riding trowel is provided with a pair of circular finishing pans that are attached to the conventional rotor blades used later in the finishing process. The pans are characterized by an acoustic impedance approximating the acoustic impedance of plastic concrete, thereby optimizing the energy transferred to the concrete. Preferred pans comprise ultra-high molecular weight polyethylene (UHMWPE) plastic. During troweling, the pans are frictionally revolved over the plastic concrete for finishing the surface without prematurely sealing the uppermost slab surface. Through the disclosed troweling method, a highly stable concrete surface results, and delamination is minimized. Alternative troweling uses pans coated with layered impedance matching material. Alternative equipment includes slip form pavers.

REFERENCES:
patent: 3936209 (1976-02-01), Krage
patent: 3936212 (1976-02-01), Holz, Sr.
patent: 4046484 (1977-09-01), Holz, Sr.
patent: D323510 (1992-01-01), Allen
patent: 5108220 (1992-04-01), Allen
patent: 5408258 (1995-04-01), Kolessar
patent: 5480257 (1996-01-01), Allen
patent: 5520862 (1996-05-01), Face et al.
patent: 5527175 (1996-06-01), Face et al.
patent: 5613801 (1997-03-01), Allen
patent: 5685667 (1997-11-01), Allen
patent: 5890833 (1999-04-01), Allen
patent: 6019545 (2000-02-01), Allen
patent: 6048130 (2000-04-01), Allen
patent: 6053660 (2000-04-01), Allen
patent: 6087786 (2000-07-01), Allen
patent: 6089787 (2000-07-01), Allen
patent: 6101880 (2000-08-01), Face et al.
patent: 6106193 (2000-08-01), Allen

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Acoustically matched concrete finishing pans does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Acoustically matched concrete finishing pans, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Acoustically matched concrete finishing pans will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-3679120

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.