Combination tank car valve skid and valve seat
AssigneeACF Industries, Incorporated
InventorsDallas W. Rollins, Gunter R. Behle, Charles E. Reedy
Life of this patent
Estimating the term…
Abstract
In a bottom operable tank car lading valve assembly, a combination skid and lading valve seat for the lading valve closure is provided, which is attached to the tank car universal flange with mechanical fasteners. The valve seat portion extends inwardly and upwardly from the universal flange and includes a machined seat. The skid portion extends upwardly and outwardly from the universal flange, forming a circumferential taper, and the upper portion abuts the bottom of the tank. The skid portion protects the lading valve closure and the lading valve seat against impacts which might normally cause unseating of the valve closure and escape of the lading in the absence of the skid portion.
Claims18
In a bottom operable tank car lading valve assembly, a combination skid and lading valve seat for a lading valve closure comprising:
- a generally annular body portion having fastening means for attaching the combination skid and valve seat to a tank car universal flange;
- a generally cylindrical portion extending inwardly and upwardly from said body portion having an opening for lading flow therethrough and including a valve seat for a valve closure;
- a skid portion integral with said cylindrical portion and said body portion extending longitudinally outwardly from said body portion and abutting the tank bottom at the end portion thereof;
- the vertical extent of said skid portion decreasing as said skid portion extends outwardly from said universal flange to define a tapered lower surface;
- said fastening means maintaining said skid portion abutting the tank bottom without attachment to the tank bottom;
- whereby said skid portion protects said lading valve closure and said lading valve seat against impacts which might normally cause unseating of the valve closure and escape of the lading in the absence of the skid portion.
In a bottom operable tank car lading valve assembly, a combination skid and lading valve seat for a lading valve closure comprising:
- a generally annular body portion having fastening means for attaching the combination skid and valve seat to a tank car universal flange;
- a generally cylindrical portion extending inwardly and upwardly from said body portion having an opening for lading flow therethrough and including a valve seat for a valve closure;
- a skid portion integral with said cylindrical portion and said body portion extending upwardly from said body portion adjacent said universal flange and abutting the tank bottom at least at transversely spaced side portions;
- said skid portion further extending longitudinally outwardly from said universal flange, and abutting the tank bottom at its end portion;
- said skid portion including an upper surface which is curved where it abuts the tank bottom to follow the contour of the tank;
- the vertical extent of said skid portion decreasing as said skid portion extends outwardly from said universal flange to define a tapered lower surface;
- whereby said skid portion protects said lading valve closure and said lading valve seat against impacts which might normally cause unseating of the valve closure and escape of the lading in the absence of the skid portion.
In a bottom operable tank car lading valve assembly a combination skid and lading valve seat for a lading valve closure comprising:
- a generally annular body portion having first fastening means for attaching the combination skid and valve seat to a tank car universal flange;
- a generally cylindrical portion extending inwardly and upwardly from said body portion having an opening for lading flow therethrough, and including a valve seat for a valve closure;
- a valve closure movable between open and closed positions relative to said seat;
- a skid portion integral with said cylindrical portion and said body portion extending upwardly from said body portion adjacent said universal flange and abutting the tank bottom at least at transversely spaced side portions;
- said skid portion further extending longitudinally outwardly from said universal flange and abutting the tank bottom at its end portion;
- the vertical extent of said skid portion decreasing as said skid portion extends outwardly from said universal flange to define a tapered lower surface;
- whereby said skid portion protects said lading valve closure and said lading valve seat against impacts which might normally cause unseating of the valve closure and escape of the lading in the absence of the skid portion;
- said body portion further including second fastening means attaching a depending outlet chamber to said body portion and valve seat portion;
- said outlet chamber being hollow and including at least one unloading spout for lading discharge;
- said second fastening means being shearable upon impact to said outlet chamber whereby said valve seat and said valve closure will remain in place during and after such impact, preventing the escape of lading.
Dependencies are inferred from the claim text.