Title:
Tubular sheath for tension wires in prestressed concrete
United States Patent 3212222


Inventors:
Hans, Wittfoht
Application Number:
US30275763A
Publication Date:
10/19/1965
Filing Date:
07/29/1963
Assignee:
Pforzheim, Metallschlauch
Primary Class:
Other Classes:
138/173
International Classes:
E04C5/10; F16L33/24
View Patent Images:
US Patent References:
2677957Prestressed concrete structure1954-05-11
2102969Pipe and method of making the same1937-12-21
1057505N/A1913-04-01
0414767N/A1889-11-12
Foreign References:
GB188711666A
GB189221926A