Valve construction and method of use

Valves and valve actuation – Fluid actuated or retarded – With adjustable limit stop for actuator

Reexamination Certificate

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Details

C251S285000, C251S286000

Reexamination Certificate

active

07571890

ABSTRACT:
An actuated valve having a rotatable cam that controls an opening and closing disc and stop members for the cam, the cam having a notch that allows the cam to be stopped between fully open and fully closed, and an adjustable member on the stop member that corresponds with the notch that allows the cam to be rotated to the fully open or fully closed position. A method of thermally cracking at least one of whole crude oil and natural gas condensate using the actuated value.

REFERENCES:
patent: 3688645 (1972-09-01), Reaves
patent: 5054374 (1991-10-01), Scobie et al.
patent: 5139230 (1992-08-01), Lester
patent: 5190263 (1993-03-01), Roberts
patent: 5259589 (1993-11-01), Posner
patent: 5348271 (1994-09-01), Owen et al.
patent: 5386761 (1995-02-01), Holtgraver
patent: 5817226 (1998-10-01), Lenglet
patent: 6318701 (2001-11-01), Gardner
patent: 6446539 (2002-09-01), Niessen
patent: 6743961 (2004-06-01), Powers
patent: 7019187 (2006-03-01), Powers

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