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US 10,161,393 B2Granted
Mechanical drive system for a pulseless positive displacement pump
AssigneeGraco Minnesota Inc.
InventorsBradley H. Hines, Brian W. Koehn, Jeffrey A. Earles, Paul W. Scheierl, Adam K. Collins
Life of this patent
Estimating the term…
Abstract
A drive system for a pump includes a housing defining an internal pressure chamber, a working fluid disposed within and charging the internal pressure chamber, and a reciprocating member disposed within the internal pressure chamber. The reciprocating member has a pull chamber. A pull is secured within the pull chamber, and a fluid displacement member is coupled to the pull.
Claims24
A drive system for a pumping apparatus comprising:
- a housing defining an internal pressure chamber, wherein the internal pressure chamber is configured to be filled with a working fluid;
- a reciprocating member disposed within the internal pressure chamber and configured to reciprocate along a linear axis, the reciprocating member having a pull chamber extending into and integral with the reciprocating member such that the pull chamber is configured to reciprocate with the reciprocating member;
- a pull at least partially disposed within the pull chamber;
- and
- a fluid displacement member coupled to the pull, the pull extending between the fluid displacement member and the reciprocating member;
- wherein the pull is retained within the pull chamber and the pull is movable relative to the pull chamber and relative to the reciprocating member along the linear axis;
- and
- wherein the working fluid is configured to drive the fluid displacement member through a pressure stroke.
5 more elements
A drive system for a pumping apparatus comprising:
- a housing defining an internal pressure chamber, wherein the internal pressure chamber is configured to be filled with a working fluid;
- a reciprocating member disposed within the internal pressure chamber, the reciprocating member having a pull chamber extending into and integral with the reciprocating member such that the pull chamber is configured to reciprocate with the reciprocating member;
- a pull at least partially disposed within the pull chamber, wherein the pull further comprises:
- an attachment end coupled to the fluid displacement member;
- a pull body extending from the attachment end;
- and
- a free end disposed at an end of the pull body opposite the attachment end;
- wherein the free end is retained within the pull chamber, and wherein the free end is movable within the pull chamber such that the pull is movable relative to the pull chamber and relative to the reciprocating member;
- and
- a fluid displacement member coupled to the pull;
- and
- wherein the working fluid is configured to drive the fluid displacement member through a pressure stroke.
9 more elements
A drive system for a pumping apparatus comprising:
- a housing defining an internal pressure chamber, wherein the internal pressure chamber is configured to be filled with a working fluid;
- a reciprocating member disposed within the internal pressure chamber and configured to reciprocate along a linear axis, the reciprocating member having a first pull chamber and a second pull chamber, the first pull chamber and the second pull chamber integral with the reciprocating member such that the first pull chamber and the second pull chamber are configured to reciprocate with the reciprocating member;
- a first pull at least partially disposed within the first pull chamber, wherein the first pull is configured to be movable relative to the first pull chamber and the reciprocating member along the linear axis;
- a second pull at least partially disposed within the second pull chamber, wherein the second pull is configured to be movable relative to the second pull chamber and the reciprocating member along the linear axis;
- and
- a plurality of fluid displacement members, wherein a first one of the plurality of fluid displacement members is coupled to the first pull, the first pull extending between the first fluid displacement member and the reciprocating member, and wherein a second one of the plurality of fluid displacement members is coupled to the second pull, the second pull extending between the second fluid displacement member and the reciprocating member.
3 more elements
A drive system for a pumping apparatus comprising:
- a housing defining an internal pressure chamber, wherein the internal pressure chamber is configured to be filled with a working fluid;
- a reciprocating member disposed within the internal pressure chamber, the reciprocating member having a first pull chamber and a second pull chamber, the first pull chamber and the second pull chamber integral with the reciprocating member such that the first pull chamber and the second pull chamber are configured to reciprocate with the reciprocating member;
- a plurality of fluid displacement members;
- a first pull at least partially disposed within the first pull chamber, wherein the first pull comprises:
- a first attachment end coupled to a first one of the plurality of fluid displacement members;
- a first pull body extending from the first attachment end;
- and
- a first free end disposed at an end of the first pull body opposite the attachment end;
- wherein the first free end is retained within the first pull chamber and is movable within the first pull chamber such that the first pull is movable relative to the first pull chamber and relative to the reciprocating member;
- and
- a second pull at least partially disposed within the second pull chamber, wherein the second pull comprises:
- a second attachment end coupled to a second one of the plurality of fluid displacement members;
- a second pull body extending from the second attachment end;
- and
- a second free end disposed at an end of the second pull body opposite the second attachment end;
- wherein the second free end is retained within the second pull chamber, and wherein the second free end is movable within the second pull chamber such that the second pull is movable relative to the second pull chamber and relative to the reciprocating member.
13 more elements
A drive system comprising:
- a housing defining an internal pressure chamber, wherein the internal pressure chamber is configured to be filled with a working fluid;
- a reciprocating member disposed within the internal pressure chamber, the reciprocating member having a pull chamber extending into and integral with the reciprocating member such that the pull chamber is configured to reciprocate with the reciprocating member;
- a pull at least partially disposed within the pull chamber;
- and
- a fluid displacement member coupled to the pull, the pull extending between the fluid displacement member and the reciprocating member;
- wherein the pull is retained within the pull chamber and the pull is movable relative to the pull chamber and relative to the reciprocating member;
- wherein the working fluid is configured to drive the fluid displacement member through a pressure stroke;
- and
- wherein the pull is configured to pull the fluid displacement member during a suction stroke of the fluid displacement member and is further configured to not exert a direct or indirect pushing force on the fluid displacement member during a pumping stroke of the fluid displacement member.
6 more elements
A drive system for a pumping apparatus comprising:
- a housing defining an internal pressure chamber, wherein the internal pressure chamber is configured to be filled with a working fluid;
- a reciprocating member disposed within the internal pressure chamber, the reciprocating member having a first pull chamber and a second pull chamber, the first pull chamber and the second pull chamber integral with the reciprocating member such that the first pull chamber and the second pull chamber are configured to reciprocate with the reciprocating member;
- a first pull at least partially disposed within the first pull chamber, wherein the first pull is configured to be movable relative to the first pull chamber and the reciprocating member;
- a second pull at least partially disposed within the second pull chamber, wherein the second pull is configured to be movable relative to the second pull chamber and the reciprocating member;
- and
- a plurality of fluid displacement members, wherein a first one of the plurality of fluid displacement members is coupled to the first pull, the first pull extending between the first fluid displacement member and the reciprocating member, and wherein a second one of the plurality of fluid displacement members is coupled to the second pull, the second pull extending between the second fluid displacement member and the reciprocating member;
- wherein the first pull is configured to pull the first fluid displacement member during a suction stroke of the first fluid displacement member and is further configured to not exert a direct or indirect pushing force on the first fluid displacement member during a pumping stroke of the first fluid displacement member;
- and
- wherein the second pull is configured to pull the second fluid displacement member during a suction stroke of the second fluid displacement member and is further configured to not exert a direct or indirect pushing force on the second fluid displacement member during a pumping stroke of the second fluid displacement member.
6 more elements
Dependencies are inferred from the claim text.