Flow control valve
First Claim
1. A valve system for controlling the flow of fluid into a tank, comprising:
- a remote fluid level sensor in the tank;
an inlet head comprising a planar face having a fluid passage therethrough;
a receiver attached to the inlet head, the receiver comprising a tube having a closed rear wall and an open front, the tube spaced a distance from the planar face of the inlet head, and at least one connection member attached to the tube and the inlet head;
a resilient member disposed at least partially in the tube of the receiver;
a piston having a front surface and a sidewall, with at least one bleed port passing through the front surface, which may be urged by the spring to a first position with the front surface sealed against a rear surface of the planar face of the inlet head and may be moved to a second position retracted against the spring into the tube of the receiver opening the fluid passage by a fluid pressure upon the front surface; and
a bleed passage outlet in the tube of the receiver distal to the piston, the bleed passage outlet connectable to the remote fluid level sensor in the tank;
so arranged that during use when the remote fluid level sensor senses that a fluid level in the tank is below a pre-set level, a portion of fluid from a fluid pressure flow against the front surface of the piston enters through the at least one bleed port in the piston and through the bleed passage outlet to the remote fluid level sensor, to enable a fluid pressure difference between the inlet head and the tank to move the piston to the second position, allowing the fluid pressure flow to flow through the fluid passage and into the tank;
but when the fluid level sensor senses that the fluid level has reached or exceeded the preset level, the fluid level sensor shuts off the fluid flow through the bleed passage to equalize the pressure on both ends of the piston, and the resilient member urges the piston to the first position to shut off the flow of fluid, closing the fluid passage by bringing the front surface of the piston against the planar face of the inlet head.
2 Assignments
0 Petitions
Accused Products
Abstract
Systems and apparatus for controlling the flow of fluid into a tank, such as a fuel tank on heavy equipment. An inlet valve includes a head portion for making connection with a nozzle, a receiver attached thereto and a piston which closes against a face in the head portion. A float valve includes a float and a valve which seals when a predetermined fluid level is reached. A bleed line is used to connect the receiver to the float valve. The unique design allows placement of the float valve at any desired height within the tank, and placement of the bleed line inside or outside of the tank as may be desired for the application.
19 Citations
22 Claims
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1. A valve system for controlling the flow of fluid into a tank, comprising:
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a remote fluid level sensor in the tank; an inlet head comprising a planar face having a fluid passage therethrough; a receiver attached to the inlet head, the receiver comprising a tube having a closed rear wall and an open front, the tube spaced a distance from the planar face of the inlet head, and at least one connection member attached to the tube and the inlet head; a resilient member disposed at least partially in the tube of the receiver; a piston having a front surface and a sidewall, with at least one bleed port passing through the front surface, which may be urged by the spring to a first position with the front surface sealed against a rear surface of the planar face of the inlet head and may be moved to a second position retracted against the spring into the tube of the receiver opening the fluid passage by a fluid pressure upon the front surface; and a bleed passage outlet in the tube of the receiver distal to the piston, the bleed passage outlet connectable to the remote fluid level sensor in the tank;
so arranged that during use when the remote fluid level sensor senses that a fluid level in the tank is below a pre-set level, a portion of fluid from a fluid pressure flow against the front surface of the piston enters through the at least one bleed port in the piston and through the bleed passage outlet to the remote fluid level sensor, to enable a fluid pressure difference between the inlet head and the tank to move the piston to the second position, allowing the fluid pressure flow to flow through the fluid passage and into the tank;
but when the fluid level sensor senses that the fluid level has reached or exceeded the preset level, the fluid level sensor shuts off the fluid flow through the bleed passage to equalize the pressure on both ends of the piston, and the resilient member urges the piston to the first position to shut off the flow of fluid, closing the fluid passage by bringing the front surface of the piston against the planar face of the inlet head. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. An inlet valve for controlling the flow of fluid into a tank, comprising:
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an inlet head comprising a planar face having a fluid passage therethrough; a receiver attached to the inlet head, the receiver comprising a tube having a closed rear wall and an open front, the tube spaced a distance from the planar face of the inlet head and at least one connection member attached to the tube and the inlet head; a resilient member disposed at least partially in the tube of the receiver; a piston having a front surface and a sidewall, with at least one bleed port passing through the front surface, which may be urged by the spring to a first position with the front surface sealed against a rear surface of the planar face of the inlet head and may be moved to a second position retracted against the spring into the tube of the receiver opening the fluid passage by a fluid pressure upon the front surface; and a bleed passage outlet in the tube of the receiver distal to the piston, the bleed passage outlet connectable to the remote fluid level sensor in the tank;
so arranged that during use when the remote fluid level sensor senses that a fluid level in the tank is below a pre-set level, a portion of fluid from a fluid pressure flow against the front surface of the piston enters through the at least one bleed port in the piston and through the bleed passage outlet to the remote fluid level sensor, to enable a fluid pressure difference between the inlet head and the tank to move the piston to the second position, allowing the fluid pressure flow to flow through the fluid passage and into the tank;
but when the fluid level sensor senses that the fluid level has reached or exceeded the preset level, the fluid level sensor shuts off the fluid flow through the bleed passage to equalize the pressure on both ends of the piston, and the resilient member urges the piston to the first position to shut off the flow of fluid, closing the fluid passage by bringing the front surface of the piston against the planar face of the inlet head. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22)
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Specification