U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

Green and cured concrete

Patent 5381780 Issued on January 17, 1995. Estimated Expiration Date: Icon_subject June 14, 2013. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Patent References

2673725

3301601

3357745

Portable rotary power saw
Patent #: 4840431
Issued on: 06/20/1989
Inventor: Jedick

Method for cutting unhardened concrete with a soft concrete saw
Patent #: 4889675
Issued on: 12/26/1989
Inventor: Chiuminatta, et al.

Quick release mechanism for the tool of a concrete/asphalt abrader
Patent #: 4953523
Issued on: 09/04/1990
Inventor: Swan

Floor-cleaning machine with improved brush pressure control Patent #: 5048141
Issued on: 09/17/1991
Inventor: Huppi

Inventors

Assignee

Application

No. 076209 filed on 06/14/1993

US Classes:

299/39.3, Slot-type cutter; e.g., pavement saw125/13.01, Rotary125/14Saw-support feed

Examiners

Primary: Rose, Robert A.

Attorney, Agent or Firm

International Class

E21C 047/00

Abstract

A saw for grooving concrete includes a base supported by plurality of wheels such that a cutting guide of the base may press against the green concrete with a predetermined load. A cutter frame is pivotally mounted to the base and includes a cutting blade and drive means mounted thereto. The pivotal connection between the frame and the base is spaced from the cutting blade such that pivoting the frame with respect to the base will raise and lower the cutting blade between operative and inoperative positions. A handle is connected to the saw and extends rearwardly and upwardly therefrom such that an operator may stand behind the saw to push it during operation. The handle is pivotally mounted to the saw such that pushing the handle downwardly will cause the frame to pivot upwardly with respect to the base. The handle is telescopic and includes a pivot connection such that it may be folded to a storage or travel position. A depth stop is connected between the frame and the base to limit the travel of the frame towards the base, and thus provide a depth adjustment for the cutting blade.

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