Pump with angled drain system
AssigneeIrwin Industrial Tool Company
InventorMatthew Christopher Green
Life of this patent
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Abstract
A pump, such as a vacuum pump, includes at least one housing and a motor and oil reservoir disposed within the housing. The pump housing can include a bottom exterior surface and one or more side and/or front exterior surfaces that extend generally up from the bottom exterior surface. An oil drain port can be positioned at or near the intersection of the bottom exterior surface and the side or front exterior surface. The housing can include an interior bottom surface that defines at least a portion of a drain passageway for the pump and can be fluidicly coupled to the oil reservoir. At least a portion of the interior bottom surface can be angled downward at an acute angle to the horizontal towards the oil drain port to improve the draining and replacement of oil in the pump.
Claims16
A vacuum pump comprising:
- a pump housing;
- an oil reservoir containing an oil;
- an impeller housed within the pump housing;
- a housing cover flange coupled to the pump housing, the housing cover flange comprising:
- a bottom exterior surface;
- a top exterior surface;
- a first exterior surface coupled at a first end to the bottom exterior surface and at a distal second end to the top exterior surface;
- an oil drain port extending through the housing cover flange and disposed adjacent an intersection of the first exterior surface and the bottom exterior surface;
- a bottom interior surface defining at least a portion of a drain passageway fluidicly coupled to the oil reservoir, wherein at least a portion of the bottom interior surface extends at a downward angle with respect to a horizontal towards the oil drain port away from the impeller toward the first exterior surface, wherein the portion of the bottom interior surface is positioned underneath the oil reservoir and upstream of the oil drain port such that the oil can gravitationally flow from the oil reservoir to the oil drain port via the portion of the bottom interior surface, wherein the portion of the bottom interior surface is enclosed via the housing cover flange;
- and
- a handle attached to and extending above the pump housing.
Dependencies are inferred from the claim text.