United States Patent n?) 



Tazaki et al. 



[Ill 3,991,576 

 [45] Nov. 16, 1976 



154) FLOATING BREAKWATER 



[73] Inventors: Sandanori Tazaki, Kodairo; Yozo 

 Ishida, Kunitachi, both of Japan 



[73] Assignee: Bridgestone Tire Company Limited, 

 Tokyo, Japan 



[22] Filed: Dec. 27, 1974 



[21] Appl. No: 536,783 



Related VS. Application Data 



[62] Division of Ser. No. 398,358, Sept. 18, 1973. 



[30] Foreign Application Priority Data 



Sept. 19, 1972 Japan 47-107980 



Sept. 30, 1972 Japan 47-113640 



May 9, 1973 Japan 48-54312 



[52] VS. a 61/5 



[51] Int. CL» E02B 3/06 



[58] Field of Search 9/8 R. 61/1 F, 3. 4, 



61/5; 114/.5 F 



[56] References Cited 



UNITED STATES PATENTS 

 436,644 9/1890 White 61/5 



1,933.597 11/1933 McVitty 61/5 X 



2,658.350 11/1953 Magill 61/S 



3,503.214 3/1970 Desty el al 61/1 F 



3,791,150 2/1974 Tachii 61/5 



Primary Examiner — Paul R. Gilliam 

 Assistant Examiner — David H. Corbon 

 Attorney, Agent, or Firm — Sughrue, Rothwell, Mion, 

 'Zinn and Macpeak 



[57] 



ABSTRACT 



A floating breakwater in which the floating body is 

 formed by housing a floating material as a floating 

 source and a weighting material as a source for in- 

 creasing weight in a hollow shell composed of a rigid 

 material and provided with a projection on the upper 

 portion. The specific gravity of the floating body is 

 made to be 0.15 - 0.75 owing to the floating material 

 and the weighting material. 



1 Claim, 16 Drawing Figures 



Figure 1. Typical front page of a patent document, 



