Arch preform and method of constructing arch passageway

Details Arch preform and method of constructing arch passageway Arch preform and method of constructing arch passageway

1981-01-23

1983-08-30

Bell, J. Karl

Static structures (e.g., buildings)

Vertically curved arch with terminal support

52211, 52745, E04B 132

Patent

active

044009178

ABSTRACT:
A unitary structure for and a method which facilitates the construction of an arch-shaped passageway. The invention can be employed in conjunction with drywall construction materials and in a method to construct an arch-shaped passageway from a rectangular passageway.

REFERENCES:
patent: 1619631 (1927-03-01), Patasnik
patent: 2005572 (1935-06-01), Vass
patent: 2011796 (1935-08-01), Christensen
patent: 2064704 (1936-12-01), Vass
patent: 3421269 (1969-01-01), Medow
patent: 3511006 (1970-05-01), Medow
patent: 3842557 (1974-10-01), Brown
patent: 4202143 (1980-05-01), Mear et al.
patent: 4301632 (1981-11-01), Wagner

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