Heating – Heating or heat retaining work chamber structure
Patent
1982-04-16
1983-11-01
Camby, John J.
Heating
Heating or heat retaining work chamber structure
34201, 52 63, 52 83, 135 82, F27D 100, F26B 1900, E04B 112, A45B 904
Patent
active
044128177
ABSTRACT:
A canopy kiln system is provided in the form of a flat-topped tent of flexible material (lightweight canvas, etc.) having depending walls to form, when in use, an enclosure for housing one or more articles to be treated or cured, one example being in the curing of cast concrete pipe. One end of the roof of the tent is attached to a wall or the like and is stretched out overlying the articles and has its free end provided with a transverse stiffener, referred to as a strongback. The strongback is detachably connected to support structure remote from the wall and the sides or curtains of the canopy form walls. The folding mechanism comprises an overhead hoist that picks up the strong-back and moves it--and of course the canopy--toward the wall. During this movement, intermediate lift mechanism picks up an intermediate part of the roof to keep it from sagging. At a predetermined point during pick-up of the canopy, the strongback is transferred to a cradle which carries the canopy completely to the wall in its folded position.
REFERENCES:
patent: 1478396 (1923-12-01), Pownall
patent: 1548795 (1925-08-01), Fuller
patent: 1849738 (1932-03-01), Amico
patent: 2406724 (1946-08-01), Waterman
patent: 2719992 (1955-09-01), Campfield et al.
patent: 3084703 (1963-04-01), Lefebvre et al
patent: 3965625 (1976-06-01), White
patent: 4287674 (1981-09-01), Selivanov et al.
patent: 4381629 (1983-05-01), Ahn
Camby John J.
Hawkeye Concrete Products Co.
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