Diving helmet

- Tohgun Kigyo Co., Ltd.
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Description

FIG. 1 is a front elevational view of a diving helmet showing my new design;

FIG. 2 is a right side elevational view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a sectional view taken along line 6--6 in FIG. 1; and,

FIG. 7 is a front perspective view thereof.

Referenced Cited
U.S. Patent Documents
D168027 January 1953 Avant
D181887 January 1958 Stuart et al.
D214862 August 1969 Jones
D227196 June 1973 Onswold
D242881 January 4, 1977 Jones
D246271 November 8, 1977 Cerniway et al.
D261073 October 6, 1981 Spruill et al.
D320868 October 15, 1991 Kumagai et al.
Other references
  • Hartley's Undersea Walk, presumably 1987.
Patent History
Patent number: D331819
Type: Grant
Filed: Jun 12, 1990
Date of Patent: Dec 15, 1992
Assignee: Tohgun Kigyo Co., Ltd. (Tokyo)
Inventor: Masahiko Kaburaki (Tokyo)
Primary Examiner: A. Hugo Word
Assistant Examiner: Ruth McInroy
Law Firm: Zarley, McKee, Thomte, Voorhees & Sease
Application Number: 7/537,096
Classifications
Current U.S. Class: D29/9