Assignee: H-Tech, Inc.

Location: Wilmington, DE
No. of patents: 38

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Number	Title	Issue Date
7318448	Swimming pool cleaning apparatus and parts therefor A swimming pool cleaning device includes a fluid distribution system for controlling its operation. More particularly, the distribution system includes a housing having an inlet for receiving a supply of pressurized fluid, a pair of outlet openings and a valve chamb...	01/15/2008
D557374	Strainer basket	12/11/2007
D551256	Combined pump housing and pump cap	09/18/2007
D550906	Pool cleaner housing	09/11/2007
D550805	Strainer basket	09/11/2007
D539882	Heat pump	04/03/2007
D537576	Pool cleaner housing	02/27/2007
D536705	Pump housing	02/13/2007
7125146	Underwater LED light An underwater light, e.g., for a pool or spa, includes an ordinarily watertight housing, an outer compartment within the housing and floodable by water flowing therein in the event the housing is no longer watertight, a current shield within the outer compartment an...	10/24/2006
D528630	Combined filter bag ring and upper plate	09/19/2006
6568554	Hydraulic or pneumatic safety device for fluid handling apparatus A pressure vessel in accordance with the present invention comprises a cover, movable between an open position and a closed position, and a clamp for releasably clamping the cover in its closed position. The clamp includes a handle for manually operating ...	05/27/2003
6321833	Sinusoidal fin heat exchanger A fin and tube heat exchanger includes fins shaped along dynamically, empirically determined isothermal lines. The fins preferably have deflectors along a trailing edge thereof to concentrate heat flux into a back row of tubes. The deflectors bridge adjac...	11/27/2001
6287462	Alternate sanitizer for sand filter A fluid sanitizer includes a substantially cylindrical cartridge for containing sanitizing media such as a silver bactericide. The sanitizer inserts into an existing filter in the normal filter flow path and permits filtering and backwashing. The cartridg...	09/11/2001
6254788	Method of sanitizing water in a bathing pool A filter/sanitizer has a filter housing, provided with a fluid inlet and a fluid outlet, a filter cartridge with a hollow interior, located within the filter housing, and a sanitizer cartridge, with a hollow core, positioned within the hollow interior of ...	07/03/2001
6255620	Filter bag assembly line and method A filter bag assembly line first forms a tube from a filter media, the tube being cut to twice the length of a finished filter bag and being open on opposite ends. The tube is then vibration welded across its width, intermediate the ends, to form the bott...	07/03/2001
6221321	Chemical feeder A chemical feeder for use in a water circulation system includes a body, a head attached to the top of the body, and a flow passage extending through the head. A portion of the water flowing through the flow passage is diverted into the body, where the wa...	04/24/2001
6197195	Fluid handling apparatus and flow control assembly therefor A flow control assembly is provided with a cartridge which includes a body sized and shaped so as to be received in a housing of fluid handling apparatus, such as duplex strainers and diverter valves. The body has a first chamber and a second chamber adja...	03/06/2001
6136192	Filter bag and sealing ring therefor A sealing ring for use in connection with a filter bag assembly of a filter is disclosed. The sealing ring includes an annular body having an outer annular wall projecting from the body. The outer wall is flexible such that it can engage an adjacent surfa...	10/24/2000
6082993	Induced draft heater with premixing burners A fuel/air mixture control for an induction heater having a tube-type burner includes a side-venting fuel nozzle for introducing fuel into an induction air stream entering the burner. A multi-speed blower draws combustion air into the burner and an air fl...	07/04/2000
6076554	Multiport plug valve with selectable port exclusion A diverter valve includes a cup-shaped, substantially cylindrical body with a plurality of ports extending from the side of the body, each communicating with a hollow in the body. A disk shaped top is held in sealing engagement with the body. A plug is ro...	06/20/2000
6026804	Heater for fluids A fluid heater includes a housing, a burner unit disposed in a bottom portion of the housing for burning combustible fuel, a combustion chamber disposed within the housing where the fuel is burned and a heat exchanger disposed substantially within the hou...	02/22/2000
6004458	Filter/sanitizer A filter/sanitizer has a filter housing, provided with a fluid inlet and a fluid outlet, a filter cartridge with a hollow interior, located within the filter housing, and a sanitizer cartridge, with a hollow core, positioned within the hollow interior of ...	12/21/1999
5993753	Chlorinator/sanitizer and method of using same A dual chemical feeder device treats a fluid simultaneously with two different chemical compositions which may not be wholly compatible. In an exemplary embodiment for application in swimming pools, hot tubs, spas and the like, a chlorinator is combined w...	11/30/1999
5882528	Method for extending useful life of filter aid in a filter with hydraulically deformable system A device for filtering fluid includes a hollow housing having a fluid inlet and a fluid outlet. A filter element formed of fluid permeable material is disposed within the housing for filtering fluid entering the fluid inlets, the fluid passing through the...	03/16/1999
5871641	Fluid filter with pleated septum A device for filtering fluid includes a hollow housing (10) having a fluid inlet (26) and a fluid outlet (28). A filter element (50) formed of fluid permeable material is disposed within the housing (10) for filtering fluid entering the fluid inlet (26), ...	02/16/1999
5809587	Safety device for a suction outlet A safety device for use in a suction outlet assembly of a swimming pool, whirlpool, spa or the like is disclosed. More particularly, the outlet assembly has an opening therein in communication with a pump adapted to create sufficient suction for causing f...	09/22/1998
5671769	Swing check valve and method for repairing same A swing check valve, which is adapted for automatically inhibiting back flow of fluid from an outlet thereof to an inlet thereof, includes a clapper member and a housing. The housing has a first body portion, which includes its own valve seat and its own ...	09/30/1997
5624559	Bag filter and retainer therefor A fluid filter having a hollow, molded, plastic housing with an open end, a fluid inlet port and a fluid outlet. An internally threaded, plastic, molded cap is threadedly received on the housing via mating external threads for sealing the open end of the ...	04/29/1997
5609185	Valve indicator and handle assembly An actuator for actuating a valve from a first position to a second position includes a housing and a rotatable stem mounted within the housing and restricted from moving axially. The actuator also includes a non-rotatable plunger engaging the stem such t...	03/11/1997
5607224	Plastic niche and grounding assembly therefor A housing for an underwater lighting fixture includes a wet niche formed from plastic and provided with three alternative grounding pathways. A conductor strap is attached to the niche by a threaded lug which extends through the strap and an adjacent wall...	03/04/1997
5604950	Anti-clogging, variable throat suction nozzle and suction cleaning device equipped therewith A suction nozzle adapted for use in a suction cleaning device, such as an automatic swimming pool cleaner, includes a body having a throat extending from an inlet at one end of the body to an outlet at an opposite end of the body. The body itself is split...	02/25/1997
5591329	Fluid filter with pleated septum A device for filtering fluid includes a hollow housing having a fluid inlet and a fluid outlet. A filter element formed of fluid permeable material is disposed within the housing for filtering fluid entering the fluid inlet, the fluid passing through the ...	01/07/1997
5584998	Self-adjusting filter diffuser and method for assembling same in a filter housing A diffuser, which is adapted for use in a filter, includes a pair of tiers. Once of the tiers is supported on and is laterally movable relative to the other tier in response to contact by a closure dome as the dome is applied to an access opening formed i...	12/17/1996
5551467	Ball valve with controlled flow variation A device for controlling fluid flow through a conduit includes a ball valve with a ball having a conduit terminating at an end thereof in an outlet orifice having a non-circular shape. The orifice shape is compound and may be selected to linearize the flo...	09/03/1996
5542714	Adapter for coupling a pair of pipe elements An adapter for coupling a pair of pipe elements through an opening formed in a wall includes a flange mounted thereon. The flange is pivotable relative to the adapter, whereby the flange automatically compensates a non-uniform thickness of the opening....	08/06/1996
5507058	Automatic pool cleaning apparatus An apparatus for automatically cleaning submerged surfaces, such as the bottom and side walls of a swimming pool. In a preferred embodiment, the apparatus includes onboard sensors, and an onboard processor (preferably, a microprocessor) which controls ope...	04/16/1996
5435031	Automatic pool cleaning apparatus An apparatus for automatically cleaning submerged surfaces, such as the bottom and side walls of a swimming pool. In a preferred embodiment, the apparatus includes onboard sensors, and an onboard processor (preferably, a microprocessor) which controls ope...	07/25/1995
5432688	Plastic niche and grounding assembly therefor A housing for an underwater lighting fixture includes a wet niche formed from plastic and provided with a grounding strap. The grounding strap is attached to the niche by a threaded lug which extends through the strap and an adjacent wall of the niche to ...	07/11/1995

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Assignee: H-Tech, Inc.