# US 10,865,898 B2 · Hydrant valve with internal shut-off valve

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- Number: US 10,865,898 B2
- Document ID: US10865898B2
- Status: Granted
- Kind: B2
- Application number: 16/241,706
- Filed: 2019-01-07
- Published: 2019-05-09
- Granted: 2020-12-15
- Earliest claimed: 2016-09-01
- Assignees: Raycon Industries, Inc.
- Applicants: Raycon Industries, Inc.
- Inventors: Tak-Yiu Wong
- Web page: https://patentgrep.com/patent/US10865898B2

## CPC

- F16K 15/1826: {Check valves which can be actuated by a pilot valve}
- B64F 1/28: Liquid-handling installations specially adapted for fuelling stationary aircraft
- F16K 1/126: {actuated by fluid}
- F16K 31/1221: {one side of the piston being spring-loaded}
- F16K: VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING {(devices for emptying and evacuating the excess liquid in valves or conduits F16L55/07)}
- B64F: GROUND OR AIRCRAFT-CARRIER-DECK INSTALLATIONS SPECIALLY ADAPTED FOR USE IN CONNECTION WITH AIRCRAFT; DESIGNING, MANUFACTURING, ASSEMBLING, CLEANING, MAINTAINING OR REPAIRING AIRCRAFT, NOT OTHERWISE PROVIDED FOR; HANDLING, TRANSPORTING, TESTING OR INSPECTING AIRCRAFT COMPONENTS, NOT OTHERWISE PROVIDED FOR

## Abstract

A hydrant valve with an internal automatic shut-off valve. The internal valve blocks communication between a piston chamber and a hydrant chamber when in a closed position. An upper valve opens the internal valve against its biasing force permitting the flow of fluid between the hydrant chamber and the piston chamber. The internal valve closes in response to a disconnection of the upper valve.

## Claims

### Claim 1

A hydrant valve comprising:
a hydrant chamber having an inlet and an outlet;
a piston in the hydrant chamber moveable between open and closed positions relative to the inlet and a chamber disposed within the piston in communication with the inlet and the hydrant chamber;
an upper valve movable between open and closed positions relative to the outlet along a first axis, the upper valve having a biasing member that biases the upper valve toward the closed position, in the closed position the upper valve restricts fluid flow through the outlet and in the open position the upper valve permits fluid flow through the outlet;
an internal valve movable between open and closed positions in response to a movement of the upper valve, in the open position the internal valve permits fluid flow between the hydrant chamber and the piston chamber and in the closed position the internal valve restricts fluid flow between the hydrant chamber and the piston chamber, wherein the internal valve is directly contacted by the upper valve and moves along a second axis that is parallel with the first axis.

### Claim 2 (depends on 1)

The hydrant valve of claim 1 further comprising:
a pilot valve movable between open and closed positions, in the open position the pilot valve allows flow between the inlet and the internal valve and in the closed position the pilot valve allows flow between the inlet and the piston chamber.

### Claim 3 (depends on 1)

The hydrant valve of claim 1, wherein the valve further comprises an upper portion.

### Claim 4 (depends on 3)

The hydrant valve of claim 3, wherein at least one frangible connector secures the upper portion.

### Claim 5 (depends on 1)

The hydrant valve of claim 1, wherein the internal valve moves towards the closed position in response to the upper valve moving towards the closed position.

### Claim 6 (depends on 1)

The hydrant valve of claim 1, wherein in the closed position the internal valve allows fluid flow between the inlet and the piston chamber and closes the piston.

### Claim 7 (depends on 3)

The hydrant valve of claim 3, wherein the internal valve moves towards the closed position in response to a movement of the upper portion.

### Claim 8 (depends on 3)

The hydrant valve of claim 3, wherein the internal valve moves towards the closed position in response to at least a partial removal of the upper portion.

### Claim 9 (depends on 1)

The hydrant valve of claim 1, further comprising a coupler that is configured to open the upper valve when attached, wherein the internal valve closes when the coupler is detached.

### Claim 10 (depends on 2)

The hydrant valve of claim 2, wherein the piston is in the closed position when the internal valve is in the closed position and the pilot valve is in the open position.