Environmentally safe pump including seal
First Claim
Patent Images
1. A motor driven pump comprising:
- a motor housing having disposed therein a motor for rotatably driving a rotating shaft, said rotating shaft extending from said motor and being at least partially located within a pump housing;
said pump housing being connected to said motor housing, said pump housing including a pump chamber in which fluid to be pumped is pumped between a fluid inlet and a fluid outlet;
a pumping member affixed to said rotating shaft and disposed within said pump chamber;
a piston seal located along said shaft between said motor and said pumping member;
a fluid repeller located along and affixed to said shaft between said pump chamber and said piston seal, said fluid repeller including a plurality of radially outward extending portions substantially parallel to one another, said radially outward extending portions working together with a plurality of fixed radially inward extending members so as to resist the flow of fluid from said pump chamber toward said piston seal; and
wherein said piston seal includes;
(a) a rotating annular sealing surface fixedly attached to said shaft for rotation therewith;
(b) a non-rotating annular sealing member opposing said rotating sealing surface; and
(c) a piston for applying pressure to the rear of said non-rotating annular sealing member so that the front of said non-rotating sealing member creates a seal with said rotating sealing surface.
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Accused Products
Abstract
A motor driven environmentally safe pump includes a sealed motor housing (22) sealingly affixed to a sealed pump housing. The pump housing defines a fluid pumping chamber (43) in which is a fluid pumping impeller (46). A triplex rotating seal (31) is disposed rearward of impeller (46) within an annular fluid chamber (87) so as to prevent the fluid being pumped via the impeller (46) from leaking along the shaft (23) toward the motor (21). A piston seal (32) is provided adjacent a second fluid chamber (204), the piston seal also for preventing fluid from leaking into the motor housing and damaging the motor.
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Citations
9 Claims
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1. A motor driven pump comprising:
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a motor housing having disposed therein a motor for rotatably driving a rotating shaft, said rotating shaft extending from said motor and being at least partially located within a pump housing; said pump housing being connected to said motor housing, said pump housing including a pump chamber in which fluid to be pumped is pumped between a fluid inlet and a fluid outlet; a pumping member affixed to said rotating shaft and disposed within said pump chamber; a piston seal located along said shaft between said motor and said pumping member; a fluid repeller located along and affixed to said shaft between said pump chamber and said piston seal, said fluid repeller including a plurality of radially outward extending portions substantially parallel to one another, said radially outward extending portions working together with a plurality of fixed radially inward extending members so as to resist the flow of fluid from said pump chamber toward said piston seal; and wherein said piston seal includes; (a) a rotating annular sealing surface fixedly attached to said shaft for rotation therewith; (b) a non-rotating annular sealing member opposing said rotating sealing surface; and (c) a piston for applying pressure to the rear of said non-rotating annular sealing member so that the front of said non-rotating sealing member creates a seal with said rotating sealing surface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification