Movable or removable closures – With means mounting closure for swinging – With biasing means
Patent
1994-01-24
1995-03-07
Redman, Jerry
Movable or removable closures
With means mounting closure for swinging
With biasing means
16308, 52 20, E05F 110
Patent
active
053946502
ABSTRACT:
A manway is defined by a cylindrical portion of a vessel wall and is closed by a cover pivotally movable between open and closed positions by means of a hinge mechanism including external brackets on the cover and the wall portion interconnected by a hinge pin. The opposite ends of the hinge pin carry bushings, on which are respectively disposed two torsion springs. Each spring has a vessel wall end portion disposed parallel to the hinge pin, the vessel wall end portions being respectively received in the opposite ends of a coupling sleeve engageable with bearing surfaces on one of the brackets. The other ends of the two torsion springs are respectively disposed generally perpendicular to the hinge pin and are received slidably through eyebolts fixed to the cover bracket.
REFERENCES:
patent: 736714 (1903-08-01), Gendron
patent: 823372 (1906-06-01), Stevens et al.
patent: 1801840 (1931-04-01), Banfield
patent: 2587287 (1952-02-01), Chamberlain
patent: 3712248 (1973-01-01), Floehr
patent: 3714680 (1973-02-01), Little
patent: 4137669 (1979-02-01), Nunlist
patent: 4534132 (1985-08-01), Smith
patent: 4537233 (1985-08-01), Vroonland et al.
patent: 4828236 (1989-05-01), Inoue
patent: 5037231 (1991-08-01), Kitamura
patent: 5038520 (1991-08-01), Amorese et al.
patent: 5136811 (1992-08-01), Lyons, Sr.
patent: 5184422 (1993-02-01), Wade et al.
Midland Manufacturing Corp. Drawing No. B305, B306.
Midland Manufacturing Corp.
Redman Jerry
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