Valves and valve actuation – With correlated flow path – Tank
Patent
1977-06-08
1979-02-27
Cline, William R.
Valves and valve actuation
With correlated flow path
Tank
251291, 137544, 137797, F16K 148
Patent
active
041415353
ABSTRACT:
A bottom operable lading valve assembly for tank cars includes a valve closure plug movable between open and closed positions relative to a circular plug seat located within a valve body opening. A housing is affixed to the valve body with fasteners comprising a shear plane. The housing includes a generally vertical housing opening into which a rotatable valve operator is mounted comprising a lower tool connection portion, a shaft portion and an upper operating portion. The upper operating portion includes upper operator threads which engage an operating stem depending from the closure plug. The upper operating portion and the valve stem terminate on or above the shear plane. The valve operator shaft portion separates below the shear plane in the event impact causes the housing to shear off along the shear plane to maintain the upper operating portion, valve stem and closure plug in seated position to prevent escape of lading. During rotation of the valve operator in a direction to move the closure plug to open position, the closure plug wipes the plug seat. Further rotation of the valve operator causes the plug to move vertically toward open position without rotation. Rotation of the valve operator from open position causes the plug to move vertically downwardly to a closed and seated position without rotation. A screen may be provided extending up into the tank from the valve body to protect the valve assembly from objects located inside the tank.
REFERENCES:
patent: 1278813 (1918-09-01), Weaver
patent: 1650406 (1927-11-01), Welcker
patent: 2092926 (1937-09-01), Lithgow
patent: 2139280 (1938-12-01), McBride
patent: 2190723 (1940-02-01), McBride
patent: 2638924 (1953-05-01), St. Clair
patent: 3219054 (1965-11-01), Elder et al.
patent: 3439938 (1969-04-01), Dunton
patent: 3586019 (1971-06-01), Thomas et al.
patent: 3591131 (1971-08-01), Carlson
patent: 3656710 (1972-04-01), Shaw
Carlson Edwin S.
Reedy Charles E.
ACF Industries Incorporated
Cline William R.
Cummings Henry W.
LandOfFree
Bottom operable tank car valve assembly having shear plane does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Bottom operable tank car valve assembly having shear plane, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Bottom operable tank car valve assembly having shear plane will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-719367