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Harbison-Fischer Manufacturing Company Patents |
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Assignee: Harbison-Fischer Manufacturing Company
Address: Crowley, TX
No. of patents: 2
Patents:
| Patent Number |
Title Of Patent |
Date Issued |
| 6830441 |
Valve for downhole pump |
December 14, 2004 |
| A downhole pump having a barrel with a reciprocating plunger therein has at least one valve. The valve has a cage, a seat and a ball. The cage has a passageway extending between two ends, with the passage including a ball chamber. The ball chamber is between a perforated member and a sto |
| 6273690 |
Downhole pump with bypass around plunger |
August 14, 2001 |
| The downhole pump has a barrel with a reciprocating plunger therein. The barrel has a first one-way valve, while the plunger has a second one-way valve. A barrel chamber is formed between the two one-way valves. The barrel chamber expands when the reciprocal movement between the plunger |
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