Static molds – Container-type molding device – Plural article forming mold – or molds with community feature
Patent
1982-08-20
1986-02-11
Hoag, Willard E.
Static molds
Container-type molding device
Plural article forming mold, or molds with community feature
52174, 249 13, 249 63, 249131, 249180, 249185, B28B 722
Patent
active
045695008
ABSTRACT:
A concrete ramp is, in cross section, in the form of an inverted U and is made in sections. The form includes a base the upper surfaces of which are inclined relative to the horizontal at an angle wanted for tread surface of the ramp. A pair of inner and outer side walls are provided for each side of the base and then are shaped and dimensioned so that their upper edges are horizontal, the height of the inner walls less than that of the outer walls. The walls of each pair are hingedly connected to the base in a manner enabling the outer walls to swing outwardly and the inner walls to swing inwardly. Power operated devices supported by the base are operable to hold the inner walls vertically or to pull them inwardly. A plate is supported by the inner walls in a manner permitting it to be lowered or raised as the inner walls are swung into or out of their operative position. The plate is flat except at the front end where it is formed to establish a thickened front portion of the ramp, the upper surface of which is coplanar with the remainder of the ramp and the bottom surface of which is horizontal.
REFERENCES:
patent: 2281698 (1942-05-01), Kogl
patent: 2331701 (1943-10-01), Kogl
patent: 2702931 (1955-03-01), Johnson
patent: 2809414 (1957-10-01), Mitchell
patent: 3269688 (1966-08-01), Hulicki
patent: 3284042 (1966-11-01), Ingalise
patent: 3310275 (1967-03-01), Lyons
patent: 3539146 (1970-11-01), Smith
patent: 3558095 (1971-01-01), McNiel
patent: 3582035 (1971-06-01), Wells et al.
patent: 3780976 (1973-12-01), Messier
Hoag Willard E.
Housel James C.
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