Prefabricated composable duct element

Details Prefabricated composable duct element Prefabricated composable duct element

1976-07-19

1978-08-08

Aegerter, Richard E.

Pipes and tubular conduits

Longitudinally seamed

Sectional

138100, 138157, 285330, 285419, 403339, F16L 900

Patent

active

041050517

ABSTRACT:
A prefabricated composable duct element for piping aeriform fluids in general and for use in erecting concrete casting boxes is provided. The duct element may be connected to further duct elements to constitute conventional ducts such as straights of various lengths, bend or elbows, multi-way unions, cap elements for closing heads and the like. All such elements are provided at each end thereof with joint connection means each including at least one male part and at least one female part for the coupling thereof with any adjoining one of said elements.

REFERENCES:
patent: 378561 (1888-02-01), Waring
patent: 556819 (1896-03-01), Hartman
patent: 825392 (1906-10-01), Keenan
patent: 867945 (1907-10-01), Carson
patent: 889745 (1908-06-01), Beach
patent: 1527300 (1925-02-01), Haerther
patent: 2460957 (1949-02-01), Whitfield
patent: 2931674 (1960-04-01), Davies
patent: 3628572 (1971-12-01), Shannon

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