Fluid handling – With casing – support – protector or static constructional... – Guards and shields
Patent
1977-03-10
1978-10-24
Cline, William R.
Fluid handling
With casing, support, protector or static constructional...
Guards and shields
251144, F16K 2703, F16K 2708
Patent
active
041216148
ABSTRACT:
In a bottom operable railway tank car valve assembly, a valve closure is movable between open and closed positions relative to an opening in a valve body mounted in the tank bottom for loading or unloading the lading. An operator depends from the valve closure. The lower end is contoured to receive a tool for opening and closing the valve closure. A valve guard is attached to the valve body with mechanical fasteners which constitute a shear plane. The valve guard includes a hollow depending portion. A valve guard cap is attached to the depending portion. The valve guard cap includes a depending protrusion which extends below the depending portion, and a transverse portion which extends below, and is spaced from, the bottom of the valve operator. If the valve guard or the valve guard cap is impacted, the loads are transmitted up through the valve guard to the valve body. Horizontal loads may cause the valve guard to shear off along the shear plane. Vertical loads are transmitted into the relatively massive tank shell. However, little, if any impact force is transmitted to the valve operator or the valve closure located within the valve body. For loading and unloading the valve guard cap is removed, and an adapter is attached to the valve guard, the adapter including a tool for raising and lowering the valve closure.
REFERENCES:
patent: 1278813 (1918-09-01), Weaver
patent: 1534139 (1925-04-01), Ostrander
patent: 2092926 (1937-09-01), Lithgow
patent: 3981481 (1976-09-01), Reedy et al.
ACF Industries Incorporated
Cline William R.
Cummings Henry W.
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