PUMP SYSTEM FOR A FIREFIGHTING VEHICLE
First Claim
1. A firefighting vehicle comprising:
- a fluid supply;
a first pump stage coupled to the fluid supply and configured to pump fluid at a first pressure;
a second pump stage coupled to the first pump stage and configured to pump fluid at a second pressure, the second pressure being substantially different from the first pressure;
a fluid manipulator; and
a valving arrangement coupling the first pump stage and the second pump stage to the fluid manipulator, the valving arrangement being selectively adjustable between a first position forming a first fluid path and a second position forming a second fluid path,wherein the first fluid path provides the fluid to the fluid manipulator at a first output pressure and the second fluid path provides fluid to the fluid manipulator at a second output pressure.
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Accused Products
Abstract
A firefighting vehicle having a dual pressure pump system includes a fluid supply, a first pump stage coupled to the fluid supply and configured to pump fluid at a first pressure, a second pump stage coupled to the first pump stage and configured to pump fluid at a second pressure, the second pressure being substantially different from the first pressure, a fluid manipulator; and a valving arrangement coupling the first pump stage and the second pump stage to the fluid manipulator, the valving arrangement being selectively adjustable between a first position forming a first fluid path and a second position forming a second fluid path, wherein the first fluid path provides the fluid to the fluid manipulator at a first output pressure and the second fluid path provides fluid to the fluid manipulator at a second output pressure.
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Citations
44 Claims
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1. A firefighting vehicle comprising:
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a fluid supply; a first pump stage coupled to the fluid supply and configured to pump fluid at a first pressure; a second pump stage coupled to the first pump stage and configured to pump fluid at a second pressure, the second pressure being substantially different from the first pressure; a fluid manipulator; and a valving arrangement coupling the first pump stage and the second pump stage to the fluid manipulator, the valving arrangement being selectively adjustable between a first position forming a first fluid path and a second position forming a second fluid path, wherein the first fluid path provides the fluid to the fluid manipulator at a first output pressure and the second fluid path provides fluid to the fluid manipulator at a second output pressure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A firefighting pump system comprising:
a pump having a first pressure stage configured to pump at a first pressure and a second pressure stage configured to pump at a second pressure, the first pressure being substantially different than the second pressure, each pressure stage having an output flow; a conduit system coupled to the pump and defining a first fluid path and a second fluid path; and a valving arrangement coupled to the conduit system and configured to selectively control the output flow of the second pressure stage relative to the output flow of the first pressure stage by selectively changing from the first fluid path to the second fluid path. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28)
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29. A method of providing both a high pressure pumping operation and a low pressure pumping operation for a firefighting vehicle, the method comprising:
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providing a pump system having a first pressure stage and a second pressure stage; providing the high pressure pumping operation by pumping an output flow from the first pressure stage to the second pressure stage and providing an output flow from the second pressure stage to a fluid manipulator; providing the low pressure pumping operation by pumping substantially all of the output flow from the first pressure stage around the second pressure stage and to the fluid manipulator; allowing at least a portion of the output flow from the first pressure stage to enter the second pressure stage during the low pressure pumping operation; and providing a valving arrangement to selectively change between the high pressure pumping operation and the low pressure pumping operation. - View Dependent Claims (30, 31, 32, 33, 34, 35, 36, 37)
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38. A firefighting pump system comprising:
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a low pressure pump stage configured to provide an output flow at a first pressure; a high pressure pump stage configured to provide an output flow at a second pressure, the second pressure being greater than the highest pressure of the low pressure pump stage; and a single conduit system having an input that is in fluid communication with the low pressure pump stage and the high pressure pump stage and an output that is configured to be in fluid communication with a fluid manipulator. - View Dependent Claims (39, 40, 41, 42, 43, 44)
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Specification