Design and method for a dripless liquid wash aid pumping mechanism
First Claim
1. A fluid dispensing system for a dishwasher, wherein the dishwasher comprises a housing, a wash chamber enclosed by the housing, and a door for accessing the wash chamber, said dispensing system comprising:
- a fluid reservoir for containing a wash aid which may be used to treat dishes in the dishwasher wash chamber during a dish cleaning cycle;
a pump for dispensing a predetermined quantity of said wash aid from said reservoir into the dishwasher wash chamber and into said reservoir from a supply reservoir one or more times during said dish cleaning cycle; and
a dual purpose check valve comprising a duckbill valve portion for controlling a first fluid flow entering said pump from said fluid reservoir and an umbrella valve portion for controlling a second fluid flow entering said wash chamber from said pump;
wherein said pump comprises a piston cylinder body having an aperture on one end thereof, said aperture receiving the duckbill valve portion of said dual purpose check valve.
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Accused Products
Abstract
A fluid dispensing system for a dishwasher is disclosed, wherein the dishwasher comprises a housing, a wash chamber enclosed by the housing, and a door for accessing the wash chamber. The dispensing system, in particular, comprises a fluid reservoir for containing a wash aid (such as detergent or a rinse aid) which may be used to treat dishes in the dishwasher wash chamber during a dish cleaning cycle. The system further comprises a pump for dispensing a predetermined quantity of the wash aid from the reservoir into the dishwasher wash chamber and into the reservoir from a supply reservoir one or more times during the dish cleaning cycle. A dual purpose check valve is provided for controlling fluid flow in two opposing directions between the pump and the fluid reservoir. The dual purpose check valve comprises a duckbill valve portion for controlling fluid flow in a first direction, and an umbrella valve portion for controlling fluid flow in an opposing second direction.
51 Citations
6 Claims
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1. A fluid dispensing system for a dishwasher, wherein the dishwasher comprises a housing, a wash chamber enclosed by the housing, and a door for accessing the wash chamber, said dispensing system comprising:
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a fluid reservoir for containing a wash aid which may be used to treat dishes in the dishwasher wash chamber during a dish cleaning cycle; a pump for dispensing a predetermined quantity of said wash aid from said reservoir into the dishwasher wash chamber and into said reservoir from a supply reservoir one or more times during said dish cleaning cycle; and a dual purpose check valve comprising a duckbill valve portion for controlling a first fluid flow entering said pump from said fluid reservoir and an umbrella valve portion for controlling a second fluid flow entering said wash chamber from said pump; wherein said pump comprises a piston cylinder body having an aperture on one end thereof, said aperture receiving the duckbill valve portion of said dual purpose check valve. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification
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- Resources
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Current AssigneeKnight LLC
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Original AssigneeKnight LLC
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InventorsVerespej, Rocklin, Penkauskas, Daniel J.
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Primary Examiner(s)Stinson; Frankie L
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Application NumberUS11/937,420Time in Patent Office1,125 DaysField of Search134/99.2, 68/17.RUS Class Current134/99.2CPC Class CodesA47L 15/4418 in the form of liquids A47L...
