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US 2003/0210984 A1Published application
Pump pressure limiting engine speed control
OwnerJohn Whitneyinventor
Life of this patent
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Abstract
A sprinkler system for a building includes an internal combustion engine which operates a water pump. The water pump in turn forces water through pipes to sprinkler heads. The engine is at least in part controlled by a throttle control mechanism which includes a spring biased piston which is moved in response to the output pressure of the pump. This prevents the pump from exceeding the rated capacity of the system components.
Claims9
A building sprinkler system having a pump said pump activated by an internal combustion engine;
- said engine having a throttle;
- said throttle attached to a control said control responsive to the output pressure of said pump and adapted to reduce engine speed at a pre-determined pressure.
A sprinkler system having a series of components said components having a rated pressure capacity;
- a pump connected to an internal combustion engine and having pressure capability which when combined with a system suction pressure exceeds said rated pressure of said components;
- throttle control responsive to water pressure from said pump adapted to prevent said water pressure from said pump from exceeding the rated pressure of said components.
Dependencies are inferred from the claim text.