Graco Minnesota Inc.

Jeffrey A Earles

Bradley H Hines

Brian W Koehn

Paul W Scheierl

Adam K Collins

Brian M Mulgrew

David John Thompson

Jeromy D Horning

A battery powered fluid sprayer includes a shelter that the battery is mounted in to provide power to the electric components of the sprayer. The shelter protects the battery from falling fluid droplets. The shelter extends above the battery and projects outward laterally and longitudinally to protect the battery. The battery can move vertically downward to dismount from the fluid sprayer.

Fluid sprayer with covered battery

A battery powered fluid sprayer includes a battery mounted to a vertically extending wall of the fluid sprayer. The battery powers an electric motor to power a pump to pump fluid to a spray gun for spraying. The battery is disposed within a battery chamber enclosed by a door. The battery is suspended above a base of the battery chamber to isolate battery from any fluid that may enter the chamber.

Battery powered fluid sprayer

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.

Drive system for a positive displacement pump

A fluid sprayer includes a battery supported by a stand of the sprayer and that is configured to provide electric power to a motor of the sprayer to cause pumping by a pump of the sprayer. The battery is mounted vertically below the sprayer body. The battery is bracketed by vertical portions of the stand.

A drive system for a pump includes a housing, first and second fluid displacement members, and a reciprocating member configured to mechanically displace the first and second fluid displacement members through respective suction strokes. The housing and fluid displacement members 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 simultaneously exerts the charge pressure on the first and second fluid displacement members.

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.

Mechanical drive system for a pulseless positive displacement pump

A method of displacing fluid includes pulling a pump displacement member through a suction stroke with a pull, the pull configured to transmit only tensile forces to the fluid displacement member. A working fluid disposed in an internal pressure chamber drive the fluid displacement member through a pumping stroke. The pull is prevented from transmitting any compressive forces to the fluid displacement member, such that the pull does not drive the fluid displacement member through the pumping stroke.

Method of pulselessly displacing fluid

Diaphragm pump

A drive system for a pump includes a first housing defining an internal pressure chamber, a working fluid disposed within and charging the internal pressure chamber, a second housing disposed within the first housing, a solenoid disposed within the second housing, a reciprocating member slidably disposed within the solenoid, a pull housing integral with a first end of the reciprocating member, the pull housing defining a pull chamber, a pull disposed within the pull chamber, and a fluid displacement member coupled to the pull.

Electric drive system for a pulseless positive displacement pump

A drive system for a pump includes a first housing defining an internal pressure chamber, a working fluid disposed within and charging the internal pressure chamber, a second housing having a first and second pumping chambers and an aperture through an end of the second housing, a reciprocating member slidably disposed between the first pumping chamber and the second pumping chamber, a pull housing integral with the reciprocating member and projecting through the aperture, a first sealing member disposed around a circumference of the reciprocating member, a second sealing member disposed around a circumference of the aperture, the pull housing defining a pull chamber, a pull disposed within the pull chamber, and a fluid displacement member coupled to the pull.

Growing community of inventors

Lakeville, MN, United States of America

Jeffrey A Earles