Storage tank shutoff valve
First Claim
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1. An assembly adapted for cutting off the flow of a fluid into a storage tank or the like in response to a predetermined fluid level in the tank, comprising:
- a) a housing, said housing having an inlet and an outlet and an internal axial flow passage-therebetween, said housing being adapted for placement in a storage tank;
b) a valve assembly disposed in said housing, said valve assembly including a shutoff valve movable within said housing in an axial direction between a first open position permitting the flow of fluid through said internal flow passage and a second closed position substantially blocking fluid flow through said internal passage;
c) a guide associated with said housing for guiding movement of the shutoff valve in axial direction in said housing;
d) an actuating assembly, said actuating assembly being interconnected to said valve assembly for moving said shutoff valve between said open and closed positions as a function of a fluid level in a storage tank; and
e) a shield stationarily secured in the internal flow passage between the inlet and the shutoff valve, the shield including a radially extending portion for shielding the shutoff valve from direct fluid impingement from fluid entering the internal flow passage through the housing inlet and an axially extending portion, the axially extending portion defining a space and the shutoff valve being movable into the space defined by the axially extending portion of the shield.
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Abstract
A valve assembly for automatically shutting off the flow of a pressurized liquid to a storage tank includes a cam that is rotated in response to the level of a liquid in the storage tank. A follower moves a poppet valve axially with a housing as a nonlinear function of rate of cam rotation. The poppet valve is moved to a closed position to terminate flow of a liquid to the storage tank whenever the liquid level within the storage tank reaches a predetermined level.
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Citations
18 Claims
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1. An assembly adapted for cutting off the flow of a fluid into a storage tank or the like in response to a predetermined fluid level in the tank, comprising:
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a) a housing, said housing having an inlet and an outlet and an internal axial flow passage-therebetween, said housing being adapted for placement in a storage tank; b) a valve assembly disposed in said housing, said valve assembly including a shutoff valve movable within said housing in an axial direction between a first open position permitting the flow of fluid through said internal flow passage and a second closed position substantially blocking fluid flow through said internal passage; c) a guide associated with said housing for guiding movement of the shutoff valve in axial direction in said housing; d) an actuating assembly, said actuating assembly being interconnected to said valve assembly for moving said shutoff valve between said open and closed positions as a function of a fluid level in a storage tank; and e) a shield stationarily secured in the internal flow passage between the inlet and the shutoff valve, the shield including a radially extending portion for shielding the shutoff valve from direct fluid impingement from fluid entering the internal flow passage through the housing inlet and an axially extending portion, the axially extending portion defining a space and the shutoff valve being movable into the space defined by the axially extending portion of the shield. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. In combination with an above ground storage tank, an assembly for substantially terminating flow of a fluid to the storage tank in response to a predetermined fluid level in the tank, the assembly comprising:
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a) a housing disposed in said fluid tank, said housing having an inlet and an outlet and an internal axial flow passage therebetween; b) a valve assembly disposed in said housing, said valve assembly including a shutoff valve moveable within said housing in an axial direction between a first open position permitting the flow of fluid through said internal flow passage and a second closed position substantially blocking fluid flow through said internal passage; c) a guide associated with said housing for guiding movement of the shutoff valve in an axial direction and said housing; d) an actuating assembly, said actuating assembly being interconnected to said valve assembly from moving said shutoff valve between said open and closed positions as a function of a fluid level in the storage tank; and e) a shield stationarily secured in the internal flow passage between the inlet and the shutoff valve, the shield including a radially extending portion for shielding the shutoff valve from direct fluid impingement from fluid entering the internal flow passage through the housing inlet and an axially extending portion, the axially extending portion defining a space and the shutoff valve being movable into the space defined by the axially extending portion of the shield.
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Specification