View source for 20250207575. Drive System Positi (Graco Minnesota .)

= DRIVE SYSTEM FOR A POSITIVE DISPLACEMENT PUMP =

'''Abstract''':
a drive system for a pump includes a housing and a fluid displacer and a reciprocator configured to mechanically displace the fluid displacer through respective suction strokes. the housing and fluid displacer define an internal pressure chamber configured to be filled with a working fluid having a charge pressure. the internal pressure chamber is configured such that the working fluid exerts the charge pressure on the fluid displacer during both the suction stroke and a pressure stroke of the fluid displacer.

'''Inventor(s)''': [[:Category:Bradley H. Hines of Andover MN US|Bradley H. Hines]], [[:Category:Brian W. Koehn of Minneapolis MN US|Brian W. Koehn]], [[:Category:Jeffrey A. Earles of Lakeville MN US|Jeffrey A. Earles]], [[:Category:Paul W. Scheierl of Circle Pines MN US|Paul W. Scheierl]], [[:Category:Adam K. Collins of Brooklyn Park MN US|Adam K. Collins]]

'''CPC Classification''': [[:Category:CPC_F04B43/025|F04B43/025]] (POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS  (machines for liquids, or pumps, of rotary-piston or oscillating-piston type ; non-positive-displacement pumps ; pumping of fluid by direct contact of another fluid or by using inertia of fluid to be pumped ))


[[Category:Patent Applications]]
[[Category:Graco Minnesota Inc.]]
[[Category:CPC_F04B43/025]]
[[Category:Bradley H. Hines of Andover MN US]]
[[Category:Brian W. Koehn of Minneapolis MN US]]
[[Category:Jeffrey A. Earles of Lakeville MN US]]
[[Category:Paul W. Scheierl of Circle Pines MN US]]
[[Category:Adam K. Collins of Brooklyn Park MN US]]

[https://wikipatents.org/index.php?search=20250207575+rejection&title=Special%3ASearch&wprov=acrw1_-1 Search for rejections for patent application number 20250207575]


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