Check valve of fuel system
AssigneeCaterpillar Inc.
InventorsSenthilkumar Rajagopalan, Prashanth Sastry, Stephen R. Lewis, Tejas Vijaykamar Mayavanshi
Life of this patent
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Abstract
A spring guide configured to axially align a spring within a bore provided by a body of a check valve is provided. The spring guide comprises a base portion, a guide portion, and a stud. The base portion is configured to abut a closed end of the bore. The guide portion extends from the base portion. The guide portion is configured to abut an internal wall of the bore. The stud protrudes from the guide portion. The stud is configured to contact an inner spiral surface of the spring.
Claims20
A spring guide configured to axially align a spring within a bore provided by a body of a check valve, the spring guide comprising:
- a base portion configured to abut a closed end of the bore;
- a guide portion extending from the base portion, the guide portion configured to abut an internal wall of the bore;
- and
- a stud protruding from the guide portion, the stud configured to contact an inner spiral surface of the spring.
A check valve of a fuel system, the check valve comprising:
- a body defining a bore;
- a spring disposed within the bore;
- a valve element operatively engaged with a first end of the spring;
- and
- a spring guide operatively engaged with a second end of the spring to axially align the spring within the bore, the spring guide including:
- a base portion abutting a closed end of the bore;
- a guide portion extending from the base portion, the guide portion abutting an internal wall of the bore;
- and
- a stud protruding from the guide portion, the stud contacting an inner spiral surface of the spring.
A fuel system comprising:
- a tank holding a supply of fuel;
- a pump configured to pressurize the fuel;
- a check valve operatively connected to the pump, the check valve configured to receive the pressurized fuel from the pump and supply the pressurized fuel to an injector, the check valve comprising:
- a body defining a bore;
- a spring disposed within the bore;
- a valve element operatively engaged with a first end of the spring;
- and
- a spring guide operatively engaged with a second end of the spring to axially align the spring within the bore, the spring guide including:
- a base portion abutting a closed end of the bore;
- a guide portion extending from the base portion, the guide portion abutting an internal wall of the bore;
- and
- a stud protruding from the guide portion, the stud contacting an inner spiral surface of the spring.
Dependencies are inferred from the claim text.