Piston limit sensing for fluid application
AssigneeWagner Spray Tech Corporation
InventorsDaniel Robert ZIENTARA, Lam HUU NGUYEN
Life of this patent
Estimating the term…
Abstract
A liquid delivery system includes a source of hydraulic fluid and a hydraulic cylinder fluidically coupled to the source of hydraulic fluid and having a hydraulic piston movable between first and second limit positions. The liquid deliver system includes a rod connected to the piston and extending out of the hydraulic cylinder and a sensor device located outside the hydraulic cylinder and configured to sense a position of the rod and to generate a signal indicating the sensed position. The liquid delivery system includes a liquid cylinder comprising a liquid piston, operably driven by the rod, to pump a liquid along a flow path to a fluid applicator.
Claims21
1-20. (canceled)
A fluid delivery system comprising:
- a first cylinder;
- a first piston disposed in the first cylinder;
- a first piston rod connected to the first piston and extending out of the first cylinder;
- a second cylinder;
- a second piston disposed in the second cylinder;
- a second piston rod connected to the second piston and extending out of the second cylinder;
- a housing assembly disposed between the first cylinder and the second cylinder, the housing assembly comprising:
- a first wall;
- a second wall, the second wall spaced from the first wall to define a first opening and a second opening;
- a first cover removably coupled to, at least, the first wall to cover the first opening;
- and
- a second cover removably coupled to, at least, the second wall to cover the second opening;
- and
- a coupling assembly disposed within the housing assembly and coupling the first piston rod to the second piston rod.
A fluid delivery system comprising:
- a pump assembly comprising:
- a first cylinder;
- a first piston disposed in the first cylinder;
- a first piston rod connected to the first piston and extending out of the first cylinder;
- a second cylinder;
- a second piston disposed in the second cylinder;
- and
- a second piston rod connected to the second piston and extending out of the second cylinder;
- a housing assembly disposed between the first cylinder and the second cylinder, the housing assembly comprising:
- a first wall;
- a second wall, the second wall spaced from the first wall to define a first opening and a second opening;
- a first cover removably coupled to, at least, the first wall to cover the first opening;
- and
- a second cover removably coupled to, at least, the second wall to cover the second opening;
- and
- a non-contact sensor device disposed on one of the first wall or the second wall and configured to detect a portion of the pump assembly having a different diameter than at least a portion of the first piston rod and at least a portion of the second piston rod and generate a sensor signal indicative of a position of the portion of the pump assembly.
A fluid delivery system comprising:
- a pump assembly comprising:
- a source of hydraulic fluid;
- a hydraulic cylinder;
- a hydraulic piston disposed in the hydraulic cylinder;
- a hydraulic piston rod connected to the hydraulic piston and extending out of the hydraulic cylinder;
- a source of fluid;
- a fluid cylinder;
- a fluid piston disposed in the fluid cylinder;
- and
- a fluid piston rod connected to the fluid piston and extending out of the fluid cylinder;
- a housing assembly disposed between the hydraulic cylinder and the fluid cylinder, the housing assembly comprising:
- a first wall;
- a second wall, the second wall spaced from the first wall to define a first opening and a second opening;
- a first cover removably coupled to, at least, the first wall to cover the first opening;
- and
- a second cover removably coupled to, at least, the second wall to cover the second opening;
- and
- a non-contact sensor device disposed on one of the first wall or the second wall and configured to detect a portion of the pump assembly having a different diameter than at least a portion of the hydraulic piston rod and at least a portion of the fluid piston rod and generate a sensor signal indicative of a position of the portion of the pump assembly.
Dependencies are inferred from the claim text.