VALVE ARRANGEMENT

• US 20170114912A1
• Filed: 10/07/2016
• Published: 04/27/2017
• Est. Priority Date: 10/21/2015
• Status: Abandoned Application

• Current Assignee: AGCO International GmbH (AGCO International Holdings BV)
• Original Assignee: AGCO International GmbH (AGCO International Holdings BV)
• Inventors: Staedele, Alexander, Hoeldrich, Bernhard
• Application Number:
  US15/288,407
• Publication Number:
  US 20170114912A1
• Time in Patent Office: Days
• CPC Class Codes: B60C 23/00318 on the wheels or the hubs
• CPC Class Codes: B60C 23/00354 Details of valves
• CPC Class Codes: B60C 23/00363 Details of sealings
• CPC Class Codes: F16K 15/044 spring-loaded
• CPC Class Codes: F16K 15/1826 Check valves which can be actuated by a pilot valve
• CPC Class Codes: F16K 15/20 specially designed for inflatable bodies, e.g. tyres connecting valves to inflatable bodies B60C29/00
• CPC Class Codes: F16K 25/005 Particular materials for seats or closure elements
• CPC Class Codes: F16K 3/26 with fluid passages in the valve member
• CPC Class Codes: F16K 3/265 with a sleeve sliding in the direction of the flow line
• CPC Class Codes: F16K 3/314 Forms or constructions of slides; Attachment of the slide to the spindle
• CPC Class Codes: F16K 31/1221 one side of the piston being spring-loaded

Abstract

A pilot controlled valve including an air inlet passage, an air outlet passage and a slider. The slider is moveable within a bore between a closed position and an open position in which the connection between the passages is closed and opened respectively. The slider is provided with a resilient member to bias the slider into the closed position. A part of the slider registers with the bore to define a chamber within the bore, and the slider is provided with a discharge passage that connects the chamber to the inlet passage so that an increase in pressure in the chamber resulting from a leak can be released.

Claims

1. A pilot controlled valve comprising:

an air inlet passage,

an air outlet passage, and

a slider, said slider moveable within a bore between a closed position and an open position in which the connection between the inlet and outlet passages is closed and opened respectively, said slider provided with a resilient member to bias said slider into the closed position and wherein a part of said slider registers with the bore to define a chamber within said bore, and wherein said slider is provided with a discharge passage which connects the bore chamber to the inlet passage so that an increase in pressure in the bore chamber resulting from a leak can be released, characterized in that the discharge passage is provided with a one way valve to prevent air flowing from a supply passage into the bore chamber.

2. The pilot controlled valve as claimed in claim 1 wherein the resilient member is located within the bore chamber.

3. The pilot controlled valve as claimed in claim 1 wherein the discharge passage comprises a longitudinal passage extending along a longitudinal axis of the slider and at least one passage extending radially from the longitudinal axis.

4. The pilot controlled valve as claimed in claim 1 wherein a control line pressure is used to open said valve.

5. The pilot controlled valve as claimed in claim 1 wherein said valve is a tire valve for a vehicle.

6. The pilot controlled valve as claimed in claim 5 wherein the inlet passage is connected to an air supply from a tire pressure control system (TPCS) of the vehicle, the outlet passage is connected to a tire, and the slider is moved by a control line pressure from the TPCS.

7. The pilot controlled valve as claimed in claim 1 wherein a leakage into the bore chamber can be detected by a pressure sensor located in the inlet passage.