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US 5,207,567 AGranted
Pump with integral sump
AssigneeAllied-Signal Inc.
InventorTheodore J. Joy
Life of this patent
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AssigneeAllied-Signal Inc.
InventorTheodore J. Joy
Estimating the term…
The pump (10) with integral sump (100) comprises a pump body (12) having therein a bore (18) in which is disposed a resiliently biased and reciprocating pump piston (30). One end of the pump piston (30) is received within an end opening (22) of the bore (18) and a central opening (42) of an outlet member (40). The outlet member (40) includes outlet valve openings (45) each housing a coil spring (41) or elastomeric member (41A) biasing a valve member (43) against a valve seat (49). The valve openings (45) communicate with an interior opening or pumping chamber (44) of the outlet member (40) wherein a spring member (46) biases an inlet valve (60) against an inlet seat plate (70). The inlet seat plate (70) has a central opening (72) communicating on one side with a sump chamber (110). A sump sleeve (90) is located sealingly within the bore (18) and abuts the inlet seat plate (70), contains therein a slidable sump piston (98) biased by a sump spring (96), and has a plurality of inlet openings (92). Reciprocating movement of the pump piston (30) draws fluid through the inlet opening (92), sump chamber (110), central opening (72) of the inlet seat plate (70), and past the retracted inlet valve (60) so that after closure of the inlet valve (60) when the pump piston is at dead center, subsequent movement of the pump piston (30) into the bore (18) causes the fluid to be pumped past the valve seats (49) and valve members (43) and through outlet openings (48).
In a pump assembly, a bore having an end opening receiving slidably therein a pump piston, the pump piston biased by spring means for reciprocating movement relative to the end opening and extending into an outlet member disposed adjacent the end opening, the outlet member including at least one outlet valve opening containing therein resilient means biasing outlet valve means against an outlet valve seat, a spring member disposed within the bore and biasing an inlet valve against an inlet seat plate, the inlet seat plate having a through opening, a sump sleeve disposed within said bore and capturing said inlet seat plate between the sump sleeve and said outlet member, the sump sleeve having a longitudinal opening receiving slidably therein a sump piston and defining a sump chamber with the sump piston and inlet seat plate, a sump spring in the bore and biasing said sump piston toward said inlet seat plate, and an inlet opening in said sump sleeve, so that reciprocating movement of the pump piston causes fluid to be sucked through the inlet opening and into the sump chamber, through the through opening and around the inlet valve, and pumped through the outlet valve opening via the valve seat and outlet valve means.
In a pump assembly, a bore having an end opening receiving slidably therein a pump piston, the pump piston biased by spring means for reciprocating movement, an outlet member disposed adjacent the end opening and receiving the piston, the outlet member including at least one outlet valve opening containing therein outlet valve means, a spring member disposed within the bore and biasing an inlet valve against an inlet seat plate, the inlet seat plate having a through opening, a sump sleeve disposed within said bore and capturing said inlet seat plate between the sump sleeve and said outlet member, the sump sleeve having a longitudinal opening receiving slidably therein a sump piston and defining a sump chamber with the sump piston and inlet seat plate, a sump spring in the bore and biasing said sump piston toward said inlet seat plate, an inlet opening in said sump sleeve, and end plug means engaging the sump sleeve, so that reciprocating movement of the pump piston causes fluid to be sucked through the inlet opening and into the sump chamber, through the through opening and around the inlet valve, and pumped through the outlet valve opening via the valve seat and outlet valve means.
Dependencies are inferred from the claim text.