USD227469S - Engine preheater - Google Patents
Engine preheater Download PDFInfo
- Publication number
- USD227469S USD227469S US D227469 S USD227469 S US D227469S
- Authority
- US
- United States
- Prior art keywords
- engine preheater
- preheater
- engine
- toronto
- ontario
- Prior art date
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- 210000000614 Ribs Anatomy 0.000 description 2
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Description
United States Patent 0 "ce 227,469
Patented June 26, 1973 ENGINE PREHEATER Bernard H. Pickard, Toronto. Ontario. Canada. assignor to Bardon Research and Development Limited. Toronto. Ontario. Canada Filed July 6. 1971, Ser. No. 160,269
Term of patent 14 years Int. Cl. D2303 us. c1. D23--86 FIG. 1 is a perspective view of an engine preheater References Cited smwing W new i UNITED STATES PATENTS FIG. 2 1s a rear vlew of the engine 'preheater lllustrated in FIG. 1, and D- 216.793 3/1970 Klaneke D2386 h t H t d 1,413,539 4/1922 Martln 219-301 x in L In end new of the enJne pre ea er 1 us a e 1.683.920 9/1928 Rohlzle 219 208 X The four ribs shown in FIG. 3 that project into the 1,714,607 5/1929 Matflerre Ci cular passage extending through the engine preheater 3, 8/1 30 Esslmger extend for about the length of and are positioned adjacent FOREIGN PATENTS I? intermediate ti n Of the engine preheater. 37,821 8/1924 Denmark 219208 683,920 3/1930 France 219 20s The ornamental design for an engine preheater, as shown and described.
WALLACE R. BURKE, Primary Examiner S. J. MERCER, Assistant Examiner
Family
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