USD231100S - Blast valve - Google Patents

Description

United States Patent 0 1C 231,100

Patented Apr. 2, 1974 BLAST VALVE Matti V. Purhonen, Helsinki, Finland, assignor to Temet 0y, Helsinki, Finland Filed Dec. 30, 1971, Ser. No. 214,528

Claims priority, application Finland July 2, 1971 Term of patent 14 years Int. Cl. D23--04 US. Cl. D23151 Des. 231,100

FIG. 1 is a top perspective view of a blast valve showing my new design;

FIG. 2 is a top perspective view thereof with the cover and filtering element removed;

FIG. 3 is a side perspective view thereof;

FIG. 4 is a top perspective view thereof with the cover removed: and

FIG. Sis a bottom plan view thereof.

I claim:

The ornamental design for a blast valve, as shown.

Fig.5

D. 216,978 D. 224,304 D. 136,057 D. 206,466 3,232,208 3,369,476 3,516,348

PAGE 3 References Cited UNITED STATES PATENTS Greene D23-4 Smith D234 Sebok D23149 Hull D23139 Maassen 98--119 Seiz et a1 98-119 Laakkonen et al. 98-119 JAMES R. LARGEN, Primary Examiner

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