Static structures (e.g. – buildings) – With lifting or handling means for primary component or... – Position adjusting means; e.g. – leveling
Patent
1981-04-16
1983-09-20
Perham, Alfred C.
Static structures (e.g., buildings)
With lifting or handling means for primary component or...
Position adjusting means; e.g., leveling
52221, E04B 548, E04F 1708, E04F 1908
Patent
active
044047797
ABSTRACT:
A subfloor trenchduct (10) construction in which the side wall members (14, 16) and lid-supporting means (37) are constructed of galvanized steel in order to provide a reduced cross section for the component members and thereby maximizing the availability of internal space within the trenchduct (10) for electric service. The galvanized steel construction obviates larger cross sections previously employed in utilization of aluminum components which detracted from the effective use of internal space of the duct, and the aluminum components required protective coating since aluminum, when exposed to alkaline concrete, experiences deterioration of the components. The lid-supporting means (37) is made vertically adjustable relative to floor level so that prior to pouring of the concrete (66) the lid (30) is accurately located in relation to the floor.
REFERENCES:
patent: 740663 (1903-10-01), Krantz
patent: 1782779 (1930-11-01), Fullman
patent: 2601213 (1952-06-01), Poupitch
patent: 2870623 (1959-01-01), Murray
patent: 2883228 (1959-04-01), Roberts Jr.
patent: 2945705 (1960-07-01), Murray
patent: 2961480 (1960-11-01), Murray
patent: 3063471 (1962-11-01), Murray
patent: 3074208 (1963-01-01), Seidel
patent: 3101097 (1963-08-01), Murray
patent: 3262238 (1966-07-01), Fork
patent: 3318476 (1967-05-01), Clark
patent: 3420017 (1969-01-01), Brugger et al.
patent: 3420018 (1969-01-01), Fork
patent: 3435568 (1969-04-01), Hoseason et al.
patent: 3453791 (1969-07-01), Fork
patent: 3494084 (1970-02-01), Hazen
patent: 3494381 (1970-02-01), Fork
patent: 3530627 (1970-09-01), Carter et al.
patent: 3551584 (1970-12-01), Rose
patent: 3593472 (1971-07-01), Bargar et al.
patent: 3721051 (1973-03-01), Fork
patent: 3724148 (1973-04-01), Bregenzer
patent: 3753585 (1973-08-01), Casto
patent: 3769445 (1973-10-01), Bregenzer
patent: 3848379 (1974-11-01), Hazen
patent: 3851674 (1974-12-01), Fork
patent: 3886702 (1975-06-01), Fork
patent: 3903666 (1975-09-01), Fork
patent: 4040755 (1977-08-01), Jorgensen et al.
patent: 4041238 (1977-08-01), Penczak
patent: 4065896 (1978-01-01), Penczak
patent: 4096347 (1978-06-01), Penczak
patent: 4194332 (1980-03-01), Fork
Calhoun L. Owen
Murray Michael A.
CTS Corporation
Palguta Larry J.
Perham Alfred C.
Young John A.
LandOfFree
Trenchduct construction having adjustable lid-supporting means does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Trenchduct construction having adjustable lid-supporting means, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Trenchduct construction having adjustable lid-supporting means will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-582766