Title:
Vacuum breakers for water supply systems
United States Patent 2893418


Inventors:
Leventhal, Leon C.
Application Number:
US65354657A
Publication Date:
07/07/1959
Filing Date:
04/18/1957
Assignee:
Leventhal, Leon C.
Primary Class:
Other Classes:
137/614.2
International Classes:
E03C1/10
View Patent Images:
US Patent References:
2646815Vacuum breaker for water supply systems1953-07-28
2322631Combined vacuum breaker and check valve1943-06-22
2259984Vacuum breaking valve1941-10-21
1960970Valve mechanism1934-05-29
1647873Check valve1927-11-01