Diaphragm seal injector
AssigneeGraco Minnesota Inc.
InventorIgor V. Radzyuk
Life of this patent
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Abstract
A lubricant injector includes a housing and a metering section attached to the housing. The housing includes a body and a metering cylinder extending from the body. The metering section includes a diaphragm disposed within the metering cylinder. The diaphragm forms a static seal between the metering cylinder and a lubricant pathway that extends through the body, and the diaphragm defines a metering chamber for measuring a volume of lubricant to be applied during a lubrication cycle. A retaining member secures the diaphragm within the metering cylinder.
Claims20
A lubricant injector comprising:
- a housing including a body and a metering cylinder extending from the body;
- an inlet cylinder attached to the body of the housing, wherein the inlet cylinder defines a pressure chamber;
- a lubricant chamber disposed within the body and connected to a the pressure chamber;
- a metering chamber connected to the lubricant chamber;
- a firing mechanism disposed within the inlet cylinder and extending into the lubricant chamber, wherein the firing mechanism is movable between a first position, where the metering chamber is fluidly isolated from the pressure chamber, and a second position, where the metering chamber is fluidly connected to the pressure chamber;
- and
- a metering portion secured to the housing, the metering portion comprising:
- a diaphragm disposed within the metering cylinder and forming a static seal about the metering chamber;
- and
- a retaining member having a first end and a second end, wherein the second end is attached to the metering cylinder, and wherein the retaining member secures the diaphragm within the metering cylinder;
- wherein the diaphragm is configured to flex to expand the metering chamber in response to a flow of lubricant to the metering chamber when the firing mechanism is in the second position.
A metering portion of a lubricant injector comprising:
- a diaphragm disposed within a metering cylinder and forming a static seal to define a metering chamber, wherein the diaphragm is configured to flex in response to a flow of lubricant to the metering chamber to expand the metering chamber and measure a volume of lubricant;
- a retaining member attached to the metering cylinder and securing the diaphragm within the metering cylinder;
- and
- a pin disposed within the metering cylinder, wherein a metering end of the pin abuts the diaphragm.
Dependencies are inferred from the claim text.