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Title:
Expansion loop and bend for underground heating pipe system
United States Patent 2823701
Inventors:
Burk, Morris S.
Application Number:
US56374556A
Publication Date:
02/18/1958
Filing Date:
02/06/1956
Assignee:
Burk, Morris S.
Primary Class:
Other Classes:
52/220.3, 137/375, 138/105, 138/149, 285/47
International Classes:
F16L51/04; F16L59/08
View Patent Images:
US Patent References:
2355966Underground insulated pipe system1944-08-15
2081867Steam main construction1937-05-25
0891855N/A1908-06-30
0727786N/A1903-05-12
0340073N/A1886-04-20
Foreign References:
DE165185C