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US 6,068,588 AGranted
Counterbalanced pump
AssigneeInternational Business Machines Corporation
InventorMichael Philip Goldowsky
Life of this patent
Estimating the term…
Abstract
Fluid is periodically pumped through a motor-driven tubular pump at a substantially constant pumping frequency. The pump includes at least one resiliently reciprocate counterbalancing ring joined to a cooperating spring having a fundamental natural frequency corresponding with the pumping frequency and pumping flowrate is varied independently of the pumping frequency.
Claims22
A method of pumping a fluid through a tubular pump comprising:
- periodically pumping said fluid through said pump at a substantially constant pumping frequency;
- counterbalancing pumping force in said pump at a fundamental natural frequency corresponding with said pumping frequency;
- and
- varying said flowrate of said fluid through said pump independently of said pumping frequency.
1 more element
A pump for pumping a fluid comprising:
- a tubular housing having an inlet, bore, and outlet in serial flow communication for channeling said fluid therethrough;
- means disposed at least in part inside said bore for periodically pumping said fluid through said pump at a substantially constant pumping frequency;
- means for counterbalancing pumping force in said pump at a fundamental natural frequency corresponding with said pumping frequency;
- and
- means for varying flowrate of said fluid through said pump independently of said pumping frequency.
2 more elements
A pump for pumping a fluid comprising:
- a tubular housing having an inlet, bore, and outlet in serial flow communication for channeling fluid therethrough;
- a tubular piston disposed coaxially in said housing bore, and having an inlet, bore and outlet;
- a motor operatively joined between said housing and piston to reciprocate said piston in said housing bore to effect a substantially constant pumping frequency;
- and
- a counterbalancing ring loosely disposed inside said housing and fixedly joined to one end of a spring having an opposite end fixedly joined to said housing, and said ring and spring are sized to effect a fundamental natural frequency substantially equal to said pumping frequency.
2 more elements
A pump for pumping a fluid comprising:
- a tubular housing having an inlet, bore and outlet in serial flow communication;
- a rotary impeller disposed coaxially in said housing bore;
- a motor operatively joined to said impeller for periodic rotation thereof at a substantially constant pumping frequency;
- and
- a counterbalancing ring loosely disposed inside said housing and fixedly joined to one end of a torsion spring having an opposite end fixedly joined to said housing, and said ring and spring are sized to effect a fundamental natural frequency substantially equal to said pumping frequency.
2 more elements
Dependencies are inferred from the claim text.