Liquid level control device

A liquid level control device for controlling the flow of liquid into a reservoir, storage tank or other container, comprising:

• nozzle means including inlet means for developing a liquid flow stream therethrough, valve means in said liquid flow stream for opening and closing the nozzle, and an access region downstream of said inlet means;
• fluid amplifier means in said liquid flow stream and operatively associated with said valve means for generating a positive fluid pressure to maintain said valve means open, said fluid amplifier including first passage means of major cross-sectional dimensions for delivering a major portion of said flow stream through said access region to said reservoir, storage tank or other container, second passage means for receiving a portion of said flow stream and being of minor cross-sectional dimensions spaced laterally of said first passage means for developing a substantially parallel liquid power stream through said access region spaced from said major portion of the flow stream delivered by said first passage means, and signal developing means for receiving a fluid pressure signal of one magnitude when said liquid power stream is parallel and of a second magnitude when said liquid power stream is altered from its parallel condition;
• and
• sensing means responsive to the static presence of the interface at a predetermined sensing level of liquid in said reservoir for altering said liquid power stream from said parallel condition.

A fluid amplifier adapted for sensing the level of a liquid in a reservoir, storage tank or other container and for generating a differential in pressure signal in response to the static presence of the liquid level at a predetermined level, comprising:

• inlet means for developing a liquid flow stream;
• first passage means of major cross-sectional dimensions for delivering a major portion of said flow stream to said reservoir, storage tank or other container;
• second passage means of minor cross-sectional dimensions spaced laterally of said first passage means for developing a substantially parallel fluid power stream;
• outlet means having its terminus positioned at said predetermined level whereby the static presence of the liquid level at the terminus of said outlet means causes said parallel fluid power stream to be diverted toward said major portion of said liquid passing through said first passage means;
• and
• signal developing means for receiving a fluid pressure signal of one magnitude when said fluid power stream is parallel and of a second magnitude when said fluid power stream is diverted.

A liquid level control device for controlling the flow of liquid into a reservoir, storage tank or other container, comprising:

• nozzle means for developing a liquid flow stream therethrough, valve means in said liquid flow stream for opening and closing the nozzle;
• fluid amplifier means in said liquid flow stream and operatively associated with said valve means for generating a positive fluid pressure to maintain said valve means open, said fluid amplifier including first passage means of major cross-sectional dimensions for delivering a major portion of said flow stream to said reservoir, storage tank or other container, second passage means of minor cross-sectional dimensions spaced laterally of said first passage means for developing a substantially parallel fluid power stream, and signal developing means for receiving a fluid pressure signal of one magnitude when said fluid power stream is parallel and of a second magnitude when said fluid power stream is diverted from its parallel condition;
• and
• outlet means having its terminus located at said predetermined level whereby the static presence of the liquid level at the terminus of said outlet means causes said parallel fluid power stream to be diverted toward said major portion of said liquid passing through said first passage means.

A fluid amplifier adapted for sensing the level of a liquid in a reservoir, storage tank or other container and for generating a differential in pressure signal in response to the static presence of the liquid level at a predetermined level, comprising:

• inlet means for developing a liquid flow stream;
• first passage means of major cross-sectional dimensions for delivering a major portion of said flow stream to said reservoir, storage tank or other container;
• second passage means of minor cross-sectional dimensions spaced laterally of said first passage means for developing a substantially parallel fluid power stream;
• sensing means responsive to said static presence of the liquid level at said predetermined level for diverting said fluid power stream away from said parallel condition;
• and
• signal developing means for receiving a fluid pressure signal of one magnitude when said fluid power stream is parallel and of a second magnitude when said fluid power stream is diverted from said parallel condition.

A liquid level control device for controlling the flow of liquid into a reservoir, storage tank or other container, comprising:

• nozzle means for developing a liquid flow stream therethrough, valve means in said liquid flow stream for opening and closing the nozzle;
• fluid amplifier means in said liquid flow stream and operatively associated with said valve means for generating a positive fluid pressure ot maintain said valve means open, said fluid amplifier including first passage means of major cross-sectional dimensions for delivering a major portion of said flow stream to said reservoir, storage tank or other container, second passage means of minor cross-sectional dimensions spaced laterally of said first passage means for developing a substantially parallel fluid power stream, and signal developing means for receiving a fluid pressure signal of one magnitude when said fluid power stream is parallel and of a second magnitude when said fluid power stream is diverted from its parallel condition;
• and
• sensing means responsive to the static presence of the interface at a predetermined sensing level of liquid in said reservoir for diverting said fluid power stream away from said parallel condition.