Adjustable springs for pressure vessel closure

Details Adjustable springs for pressure vessel closure Adjustable springs for pressure vessel closure

1992-03-23

1994-03-15

Lindsey, Rodney M.

Closure fasteners

Bolts

Multiple

292201, 2922565, 292DIG72, E05C 700

Patent

active

052941574

ABSTRACT:
A closure device for a lower opening of a coke drum pressure vessel is quick acting. The opening has an annular flange. An annular movable support encircles the pressure vessel above the flange. A stationary support secures to the flange below the movable support. A number of coil springs are evenly spaced around the stationary support between the stationary support and the movable support. Hydraulic cylinders between the movable and stationary support move the movable support axially relative to the stationary support. A head will abut the flange. Hooks mounted to the movable support will engage the head and pull the head tightly upward into engagement with the flange when the retracting cylinders are released. Pivotal cylinders will pivot the hooks between engaged and disengaged positions. The bias of the springs is independently adjustable.

REFERENCES:
patent: 2797017 (1957-06-01), Tangard
patent: 2834504 (1958-05-01), Annicy
patent: 3797882 (1974-03-01), Brimhall
patent: 3856388 (1974-12-01), Johnsson
patent: 4093176 (1978-06-01), Contastin
patent: 4664431 (1987-05-01), Kobayashi et al.
patent: 5228825 (1993-07-01), Fruchtbaum et al.

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