Small trailer tire inflation system

1. A tire inflation system for a trailer capable of being pulled by a non-class 8 vehicle, the trailer comprising an axle and a pneumatic tire mounted at each end of the axle, but without air brakes, the system comprising:

a first rotary fluid connection mounted at a first end of the trailer axle and in sealed fluid communication with a first pneumatic tire mounted at the first end of the trailer axle;

a second rotary fluid connection mounted at a second end of the trailer axle and in sealed fluid communication with a second pneumatic tire mounted at the second end of the trailer axle;

a fluid connector configured for sealed connection to an external fluid pressure source external to the trailer and the vehicle, the first rotary fluid connection and the second rotary fluid connection being in sealed fluid communication with the fluid connector such that fluid flowing into the fluid connector from the external fluid pressure source may flow substantially simultaneously into the first and second pneumatic tires;

a first one-way valve in sealed fluid communication with the fluid connector and the first pneumatic tire, the first one-way valve disposed so as to allow fluid to flow to the first pneumatic tire and not from the first pneumatic tire to the fluid connector or to the second pneumatic tire;

a second one-way valve disposed between and in sealed fluid communication with the fluid connector and the second pneumatic tire, the second one-way valve disposed so as to allow fluid to flow to the second pneumatic tire and not from the second pneumatic tire to the fluid connector or to the first pneumatic tire; and

a third one-way valve disposed so as to prevent pressurized fluid from escaping from the fluid connector to atmosphere when the fluid connector is not connected to the external fluid pressure source.

2. The system of claim 1 further comprising a pressure-relief valve (PRV) in sealed communication with the first and second one-way valves and the fluid connector, wherein the PRV is configured to release fluid when the fluid pressure at the first and second one-way valves reaches a pressure threshold.

3. The system of claim 1 , further comprising a pressure regulator in sealed communication with the first and second one-way valves and the fluid connector, wherein the regulator is configured to reduce fluid pressure from the fluid pressure source to a pressure suitable for the first and second pneumatic tires.

4. A method of inflating trailer pneumatic tires, the trailer being capable of being pulled by a non-class 8 vehicle and comprising an axle and a pneumatic tire mounted at each end of the axle, but without air brakes, the method comprising:

mounting to the trailer a fluid connector configured for sealed fluid communication with an external fluid pressure source not mounted to the trailer or to a tow vehicle;

providing sealed fluid communication between the fluid connector and each of a first pneumatic tire mounted at one end of an axle and a second pneumatic tire mounted at the other end of the axle;

providing a first one-way valve in sealed fluid communication with the fluid connector and the first pneumatic tire so as to allow pressurized fluid to flow from the fluid connector to the first pneumatic tire but not from the first pneumatic tire to atmosphere; and

connecting the fluid connector to the external fluid pressure source so as to allow pressurized fluid to flow from the fluid pressure source to each pneumatic tire substantially simultaneously.

5. The method of claim 4 , further comprising providing the first one-way valve in sealed fluid communication with the fluid connector and the second pneumatic tire so as to allow pressurized fluid to flow from the fluid connector to the second pneumatic tire but not from the second pneumatic tire to atmosphere.

6. The method of claim 5 , wherein the fluid connector comprises the first one-way valve.

7. The method of claim 5 further comprising providing a pressure-relief valve (PRV) in sealed communication with the first and second pneumatic tires, wherein the PRV is configured to release fluid when the fluid pressure at the first and second pneumatic tires reaches a pressure threshold.

8. The method of claim 6 , further comprising providing a pressure regulator in sealed fluid communication with the first and second pneumatic tires, wherein the regulator is configured to reduce fluid pressure from the external fluid pressure source to a pressure suitable for the first and second pneumatic tires.

9. The method of claim 4 , further comprising providing a second one-way valve in sealed fluid communication with the fluid connector and the second pneumatic tire so as to allow pressurized fluid to flow from the fluid connector to the second pneumatic tire but not from the second pneumatic tire to atmosphere.

10. The method of claim 9 , further comprising:

further providing the first one-way valve so as to prevent pressurized fluid from flowing from the first pneumatic tire to the second pneumatic tire; and

further providing the second one-way valve being further provided so as to prevent pressurized fluid from flowing from the second pneumatic tire to the first pneumatic tire.

11. The method of 10 , further comprising providing a third one-way valve in sealed fluid communication with the first and second one-way valves and the fluid connector so as to prevent pressurized fluid from flowing from the first and second one-way valves to atmosphere.

12. The method of claim 11 , wherein the fluid connector comprises the third one-way valve.

13. The method of claim 10 further comprising providing a pressure-relief valve (PRV) in sealed fluid communication with the first and second one-way valves and the fluid connector, wherein the PRV is configured to release fluid when the fluid pressure at the first and second one-way valves reaches a pressure threshold.

14. The system of claim 13 , further comprising providing a pressure regulator in sealed fluid communication with the first and second one-way valves and the fluid connector, wherein the regulator is configured to reduce fluid pressure from the external fluid pressure source to a pressure suitable for the first and second pneumatic tires.

15. A tire inflation system for a trailer capable of being pulled by a non-class 8 vehicle, the trailer comprising an axle and a pneumatic tire mounted at each end of the axle, but without air brakes, the system comprising:

a first rotary fluid connection mounted at a first end of the trailer axle and in sealed fluid communication with a first pneumatic tire mounted at the first end of the trailer axle;

a second rotary fluid connection mounted at a second end of the trailer axle and in sealed fluid communication with a second pneumatic tire mounted at the second end of the trailer axle; and

a fluid connector configured for sealed connection to an external fluid pressure source external to the trailer and the vehicle, the first rotary fluid connection and the second rotary fluid connection being in sealed fluid communication with the fluid connector such that fluid flowing into the fluid connector from the external fluid pressure source may flow substantially simultaneously into the first and second pneumatic tires.

16. The system of claim 15 further comprising:

a first one-way valve in sealed fluid communication with the fluid connector and the first pneumatic tire, the first one-way valve disposed so as to allow fluid to flow to the first pneumatic tire and not from the first pneumatic tire to the fluid connector or to the second pneumatic tire; and

a second one-way valve in sealed fluid communication with the fluid connector and the second pneumatic tire, the second one-way valve disposed so as to allow fluid to flow to the second pneumatic tire and not from the second pneumatic tire to the fluid connector or to the first pneumatic tire.

17. The system of claim 16 further comprising a pressure-relief valve (PRV) in sealed communication with the first and second one-way valves and the fluid connector, wherein the PRV is configured to release fluid when the fluid pressure at the first and second one-way valves reaches a pressure threshold.

18. The system of claim 16 , further comprising a pressure regulator in sealed communication with the first and second one-way valves and the fluid connector, wherein the regulator is configured to reduce fluid pressure from the fluid pressure source to a pressure suitable for the first and second pneumatic tires.

19. The system of claim 15 further comprising a one-way valve disposed so as to prevent pressurized fluid from escaping from first pneumatic tire and second pneumatic tire to atmosphere when the fluid connector is not connected to the external fluid pressure source.

20. The system of claim 19 further comprising a pressure-relief valve (PRV) in sealed communication with the first and second one-way valves and the fluid connector, wherein the PRV is configured to release fluid when the fluid pressure at the first and second one-way valves reaches a pressure threshold.

21. The system of claim 19 , further comprising a pressure regulator in sealed communication with the first and second one-way valves and the fluid connector, wherein the regulator is configured to reduce fluid pressure from the fluid pressure source to a pressure suitable for the first and second pneumatic tires.