Bottom operable air inlet and outlet valve assembly

Details Bottom operable air inlet and outlet valve assembly Bottom operable air inlet and outlet valve assembly

1977-01-05

1978-08-15

Nilson, Robert G.

Valves and valve actuation

With correlated flow path

Tank

137587, F16K 5100

Patent

active

041067495

ABSTRACT:
In accordance with the present invention an air inlet and outlet valve is mounted within an opening in the top of a railway tank car. The valve is operable from the bottom of the car by means of a rotatable operating shaft which extends from the bottom of the car up through the tank to the top of the tank to operate the valve. The operating shaft includes an operator for raising and lowering the valve located at the bottom of the tank, and includes a shaft telescoping arrangement whereby the upper portion of the shaft telescopes relative to the lower portion of the shaft, as the top of the tank moves relative to the bottom of the tank. Thus when the car is impacted and the top of the tank moves downwardly relative to the tank bottom, the upper portion of the operating shaft will move downwardly relative to the lower portion of the shaft, and the valve will remain closed during such impacts, while allowing opening and closing of the valve from the bottom of the car by means of the operating shaft and the operator.

REFERENCES:
patent: 1523484 (1925-01-01), Lindstrom
patent: 1727702 (1929-09-01), Folmsbee
patent: 3486528 (1969-12-01), DeFrees

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