UREA STORAGE SYSTEM
First Claim
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1. A urea storage system comprising;
- a storage tank for a urea solution;
a heated reservoir;
a channel connecting said storage tank to said heated reservoir;
a pump for drawing urea from said heated reservoir; and
a second pump including an actuator comprising a memory shape metal for drawing urea from said storage tank to said heated reservoir.
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Abstract
A urea storage system comprising a storage tank for a urea solution is provided. The system comprises a heated reservoir, a channel connecting the storage tank to the heated reservoir and a pump for drawing urea from the heated reservoir. A second pump including an actuator comprising a memory shape metal for drawing urea from the storage tank to the heated reservoir is also provided.
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Citations
18 Claims
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1. A urea storage system comprising;
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a storage tank for a urea solution; a heated reservoir; a channel connecting said storage tank to said heated reservoir; a pump for drawing urea from said heated reservoir; and a second pump including an actuator comprising a memory shape metal for drawing urea from said storage tank to said heated reservoir. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method of pumping urea solution in a urea storage system comprising:
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providing a urea storage tank; providing a urea reservoir fluidly connected to said storage tank; providing a pump including an actuator interposed between said storage tank and said reservoir; moving said actuator to a first position by energizing a shape memory metal attached to said actuator; moving said actuator to a second position by de-energizing the shape memory metal attached to said actuator of said pump and decompressing a spring in contact with said actuator. - View Dependent Claims (15, 16, 17, 18)
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Specification