United States Patent [w]
Shaw
[54] CRANE SAFETY DEVICES AND METHODS
[76] Inventor: Jack B. Shaw, 2710 Bedford St., Johnstown, Pa. 15904
[21] Appl. No.: 09/030,249 [22] Filed: Feb. 25, 1998
Related U.S. Application Data
[60] Provisional application No. 60/039,825, Feb. 27, 1997.
[51] Int. C I. G08B 21/00
[52] U.S. CI 340/685; 212/276
[58] Field of Search 340/685, 686.1,
340/686.6, 692; 212/155, 223, 231, 276, 281; 294/82.11, 82.15
[56] References Cited
U.S. PATENT DOCUMENTS
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3,823,395 7/1974 Rigney et al 340/685
3,969,714 7/1976 Greer 340/267 C
4,178,591 12/1979 Geppert 340/685
4,183,708 1/1980 Kuhbier et al 414/543
4,238,037 12/1980 Azovtsev et al 212/149
4,300,134 11/1981 Paciorek 340/685
4,303,973 12/1981 Williamson, Ir. et al 364/103
4.516.117 5/1985 Couture et al 340/685
4,752,012 6/1988 luergens 212/154
4,833,615 5/1989 Bitner et al 364/463
FOREIGN PATENT DOCUMENTS
0 008 210 Al 2/1980 European Pat. Off. .
0 614 845 A2 9/1994 European Pat. Off. .
7-81887 3/1995 lapan .
2 050 294 1/1981 United Kingdom .
WO 85/05614 12/1985 WIPO .
Primary Examiner—Brent A. Swarthout
Assistant Examiner—Toan Pham
Attorney, Agent, or Firm—Banner & Witcoff, Ltd.
[57] ABSTRACT
An improved crane warning system which includes acceleration sensors, motion sensors, hydraulic sensors, remote communications and/or a camera. The crane warning system may include a crane warning device integrated into the ball of the crane.
15 Claims, 7 Drawing Sheets
