Water purification apparatus
First Claim
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1. Water purification apparatus comprising in combination:
- an electrical module having a socket connectable to a source of electricity and upwardly from which extend an elongated ultraviolet light ray emitting lamp;
an elongate housing attachable to said electrical module for surrounding said lamp and having a water inlet and a water outlet;
a hollow elongate tube centrally disposed in said housing, capable of passing ultraviolet rays, closed at one end and opened at the other to permit insertion of said lamp thereinto;
an outer annular passage defined by inner and outer cylindrical walls between which is provided filter means, said outer annular passage providing a flow path for water flowing from said housing inlet and said filter means providing filtering of suspended particles from said water prior to exposure to ultraviolet rays from said ultraviolet light;
an inner annular passage the inner surface of which is defined by the exterior of said elongate tube and the outer surface of which is defined by said inner cylindrical wall of said outer annular passage spaced therefrom, said inner annular passage providing a second flow path, counter to the flow of said first mentioned flow path, for water flowing through said outer annular passage from said housing inlet for continuous flow to said housing outlet and exposing said water to ultraviolet light rays from said lamp; and
a thin sheet of ultraviolet ray reflective material lining said inner cylindrical wall to block ultraviolet rays from said first flow path and to reflect ultraviolet rays passing through said second flow path.
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Abstract
Water purification apparatus provides an elongate ultraviolet lamp extending into a surrounding hollow tube capable of passing ultraviolet light. The lamp and tube are surrounded by a housing, with water inlet and outlet, which provides an annular flow path around the hollow tube through which water may pass for exposure to ultraviolet light. An ultraviolet reflective surface in the annular flow path reflects ultraviolet rays through the water. A unique seal is provided around an open end of the hollow tube to seal the lamp from water in the housing.
128 Citations
25 Claims
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1. Water purification apparatus comprising in combination:
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an electrical module having a socket connectable to a source of electricity and upwardly from which extend an elongated ultraviolet light ray emitting lamp; an elongate housing attachable to said electrical module for surrounding said lamp and having a water inlet and a water outlet; a hollow elongate tube centrally disposed in said housing, capable of passing ultraviolet rays, closed at one end and opened at the other to permit insertion of said lamp thereinto; an outer annular passage defined by inner and outer cylindrical walls between which is provided filter means, said outer annular passage providing a flow path for water flowing from said housing inlet and said filter means providing filtering of suspended particles from said water prior to exposure to ultraviolet rays from said ultraviolet light; an inner annular passage the inner surface of which is defined by the exterior of said elongate tube and the outer surface of which is defined by said inner cylindrical wall of said outer annular passage spaced therefrom, said inner annular passage providing a second flow path, counter to the flow of said first mentioned flow path, for water flowing through said outer annular passage from said housing inlet for continuous flow to said housing outlet and exposing said water to ultraviolet light rays from said lamp; and a thin sheet of ultraviolet ray reflective material lining said inner cylindrical wall to block ultraviolet rays from said first flow path and to reflect ultraviolet rays passing through said second flow path. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. Water purification apparatus comprising in combination:
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an electrical module having a socket connectable to a source of electricity and upwardly from which extends an elongated ultraviolet light ray emitting lamp; an elongated housing having a base attachable to said electrical module having a water inlet and a water outlet and being provided with a central opening through which said lamp may be inserted for extension into said housing; a hollow elongate tube, surrounded by said housing, capable of passing ultraviolet light rays, closed at one end and opened at the other, said opened end being attached to said housing base in fluidtight connection therewith surrounding said lamp to isolate said lamp from the area of said housing surrounding said hollow tube, water flowing from said water inlet, through said area surrounding said hollow tube to said water outlet while being exposed to ultraviolet light rays from said lamp; and seal means disposed in said central opening of said housing base and surrounding said opened end of said hollow tube, said seal means being an annular elastomeric member insertable into a counterbore of said central opening and engageable by a pressure plate by which an axial force may be applied thereto to radially expand outwardly against said central opening and inwardly against said hollow tube to provide said fluidtight connection. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21)
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- 22. Filter apparatus for use in water purification apparatus of the type having an electrical module from which extends an elongated ultraviolet lamp and having a housing in which is centrally disposed an elongated tube, capable of passing ultraviolet rays and into which said ultraviolet lamp may be inserted, said housing having a water inlet and a water outlet, said filter apparatus, being placeable around said tube, comprising an inner cylindrical wall, an outer cylindrical wall and an annular space therebetween in which is provided filter material, said inner cylindrical wall and the outer surface of said elongated tube forming an annular passageway through which water passing from said water inlet and through said filter material is directed prior to exiting through said water outlet for exposure to ultraviolet light rays from said ultraviolet lamp characterized by a thin sheet of ultraviolet ray reflective material disposed against said inner cylindrical wall to block ultraviolet rays from said filter apparatus and to reflect ultraviolet rays passing through said water in said annular passageway.
Specification