...that after Walter Hunt patented the safety pin in 1849, he sold the rights to it for $400?
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| Number | Title | Issue Date |
| 7334743 | Fog generating system and method of installing same A fog generating system (20) includes a fluid feed conduit (22) and extension tube assemblies (26) spaced along the conduit (22). The assemblies (26) include nozzle fittings (40) coupled to extension tubes (32). Misti... | 02/26/2008 |
| 7137155 | Set of parts for building the upper edge and channel in overflow swimming pools A set of parts having a āUā shaped channel (11) and a side prolongation (12) are used to form the upper edge and channel in an overflow type swimming pool. The set of parts can include straight parts (1a), corner parts (1b | 11/21/2006 |
| 7076813 | Pool skimmer A skimmer system is provided which includes a reservoir, an inlet, a reservoir pump and a weir. The skimmer system may be attached to a tank having fluid therein. The fluid in the tank defines a tank fluid surface, and the fluid in the reservoir defines a reservoir ... | 07/18/2006 |
| 7062957 | Percolation test apparatus A percolation test apparatus comprises a water tank (12), a pipe (36) for directing water from the tank into a hole (20) in the ground, an on-off valve (32) for controlling the flow of water in the conduit, and a water level sensor (30... | 06/20/2006 |
| 7055286 | Modular post system and method of construction The invention provides a modular post system including a plurality of modular post members 10, 20 which are inter-connectable to form a post structure 30. The modular post members include a plurality of front post members 10 and rear post member... | 06/06/2006 |
| 6968665 | Pool grating and a method of installation A grate for a swimming pool structure is constructed by placing a multiple of grate bars in an elevated position above the gutter which is parallel to the pools edge including any curvatures. The grate bars follow the curvatures of the pool's edge. When in the eleva... | 11/29/2005 |
| 6966078 | Skimmer seal A winterizing seal for a pool skimmer includes a cover plate dimensioned to overlap the margins of the skimmer opening and having a support portion on its rear surface which extends into the skimmer passageway. A resiliently deformable gasket is provided on the supp... | 11/22/2005 |
| 6729795 | Modular drain and drain system A modular drain for receiving drainage liquid with a polygonal upper portion and a lower portion. The upper portion has a substantially lateral surface, a first vertical surface and a second vertical surface that define an upper cavity, the substantially lateral sur... | 05/04/2004 |
| 6029290 | Swimming pool skimmer cleaner An invention utilizing a conveyor belt to remove debris from a swimming pool filtration system skimmer and deposit it into a waste receptacle. The lower end of the conveyor belt is inserted into the skimmer below the level of the water. As the conveyor be... | 02/29/2000 |
| 6023793 | Swimming pool gutter including a wall covering fastened thereto A perimeter skimming gutter for a swimming pool includes a gutter having a gutter wall preferably formed of sheet material and arranged for disposition toward the interior of the swimming pool. The gutter wall includes a fastener receiving member. A wall ... | 02/15/2000 |
| 5978979 | Swimming pool gutter having a wall covering fastened thereto A perimeter skimming gutter for a swimming pool includes a gutter having a gutter wall preferably formed of sheet material and arranged for disposition toward the interior of the swimming pool. The gutter wall includes a fastener receiving member. A wall ... | 11/09/1999 |
| 5930850 | Swimming pool skimming gutter having a closed gutter conduit and water-spray tube therein A perimeter skimming gutter and retaining wall of a swimming pool comprises an elongate open first gutter conduit extending about the periphery of the swimming pool for receiving water from the swimming pool; an elongate closed second gutter conduit exten... | 08/03/1999 |
| 5774906 | Wave pool curbing system A foam-like panel which may be removably attached to a pool deck in a manner to provide a planar reflecting surface positioned parallel with the pool wall at a height greater than the upper most portion of the pool wall.... | 07/07/1998 |
| 5650066 | Grating module for peripheral gutter for discharging overflow water from a swimming pool Grating module for peripheral gutter for discharging overflow water from a swimming pool, which comprises a bendable, central longitudinal rib acting as a link for at least one transverse central rib arranged as a ridge on either side of this central rib,... | 07/22/1997 |
| 5425145 | Modular perimeter skimming gutter unit for swimming pools with exposed exterior longitudinal welds A modular perimeter skimming gutter and retaining wall unit for swimming pools with exposed exterior longitudinal welds, for pool construction by simple bonding together of a plurality of modular units in the shop or on-site, disposed about the perimeter ... | 06/20/1995 |
| 5279002 | Inlaid tile gutter system An inlaid tile gutter system for use in swimming pools contains a channel, braces mounted atop the primary gravity flow channel and stiffeners mounted on the poolside of the channel provide a relatively stiff gutter system capable of withstanding deformat... | 01/18/1994 |
| 5103607 | Channel element for ground channels in swimming-pools with vertical water flow A channel element used in swimming-pool ground channels which house water-bearing pipes and receive a latchable cover that includes a box-like shaped body, preferably made of burnt ceramic material, which fits into the ground channel groove and includes o... | 04/14/1992 |
| 4997558 | Suction control filter system for swimming pools A suction control filter system for swimming pools is provided, in which the vacuum filter of the water recirculation system features positive suction backwash of the filter during cleaning.... | 03/05/1991 |
| 4815888 | Swimming pool drain A polymer plastic drain apparatus for the aggregate decking areas of a swimming pool. The drain is comprised of an elongated trough adapted for burial in the aggregate and is formed of a bottom wall and parallel spaced apart upright sidewalls terminating ... | 03/28/1989 |
| 4758292 | Method of making a modular welded perimeter skimming gutter for swimming pools A modular bonded perimeter skimming gutter retaining wall for swimming pools is provided for construction by simple bonding together of a plurality of modular units on-site, disposed about the perimeter of a swimming pool as the retaining wall of the swim... | 07/19/1988 |
| 4734189 | Apparatus for assisting in the removal of trash from swimming pools A deflector apparatus easily and quickly mounted in position relative to an inlet opening of a swimming pool skimmer to deflect water and surface trash into the inlet opening and including a planar deflector member, an extensible member adapted to be posi... | 03/29/1988 |
| 4706309 | Automatic rim flow water level control system for gutters An automatic rim flow water level control system for gutters is provided, for use in swimming pools, which includes a peripheral gutter having at least one weir chamber on its pool side wall, the wall having a plurality of vertically extending elongated w... | 11/17/1987 |
| 4627118 | Vacuum filter for swimming pools controlling water recirculation capacity to accommodate varying gutter flow A vacuum filter is provided for vacuum flow filtration through a filter bed of water from a swimming pool including flow from the pool and from the gutter of the swimming pool, and controlling water recirculation capacity to accommodate varying gutter flo... | 12/09/1986 |
| 4616800 | Swimming pool bond beam form system A system of forms for pouring a concrete bond beam, curb and gutter in the construction of a concrete swimming pool to have waterline and curb tiles in place. A set of form boards is provided which define the bond beam waterline, gutter line and curb line... | 10/14/1986 |
| 4593421 | Turbulence reducing gutter system for swimming pools A gutter system for reducing the turbulence of the water in a swimming pools is described of the overflow type, wherein obstacles to the flow of water are reduced for both water entering and leaving the gutter system.... | 06/10/1986 |
| 4542544 | Modular welded perimeter skimming gutter for swimming pools A modular bonded perimeter skimming gutter retaining wall for swimming pools is provided for construction by simple bonding together of a plurality of modular units on-site, disposed about the perimeter of a swimming pool as the retaining wall of the swim... | 09/24/1985 |
| 4504985 | Swimming pool coping A swimming pool coping permitting overflow, which is rectilinear and has an upwardly opening overflow channel therein parallel to its length. The coping has an upper surface that is flat and imperforate and is inclined upwardly from the channel at a small... | 03/19/1985 |
| 4494257 | Flow control device A control device for regulating the skimming flow of surface water from a swimming pool to a perimeter gutter includes a housing disposed in a gutter wall, at the normal level of water in the pool, which defines a flow passage from the pool to a lower gut... | 01/22/1985 |
| 4483025 | Snap-on gutter cover for swimming pools A snap-on swimming pool gutter cover is formed of a generally planar major portion including a rear edge and an inverted, channel-shaped, front, female portion which snaps down onto a correspondingly shaped male portion of the gutter lip. The rear edge is... | 11/20/1984 |
| 4462125 | Coping and deck system for a swimming pool Collection apparatus for overflow water from a swimming pool comprising an overflow member at the side wall of the pool for flow of pool water thereover, and a flow receiving member extending outwardly from the overflow member for receiving overflow water... | 07/31/1984 |
| 4389739 | Automated surge weir and rim skimming gutter flow control system An automated skimming flow perimeter gutter control system for swimming pools is provided having a water cleaning and recirculation system receiving water from the pool, cleaning it, and returning it to the pool; a gutter conduit for disposition about the... | 06/28/1983 |
| 4380837 | Method and apparatus for controlling the flow in swimming pool gutters A method for establishing a flow gradient along the gutter of a swimming pool of the type that includes a recirculating system for the pool water with said gutter comprising a portion of such system. The method comprises providing a plurality of gutter fl... | 04/26/1983 |
| 4235008 | Method of gutter construction for swimming pools A gutter construction for the periphery of swimming pools is formed of at least two prefabricated members joining together. First is a main gutter member which is molded from a longitudinally slit, plastic cylindrical material and includes a vertical rear... | 11/25/1980 |
| 4179761 | Wall construction for swimming pools A wall construction for swimming pools, and method of making same, wherein the pool wall, the recirculating system, gutter and conduit, the bottom wall seal, and the deck coping are all formed from four standardized sheet metal members. The capacity of th... | 12/25/1979 |
| 4173799 | Water level controller for swimming pool gutter A pool having a gutter around its perimeter, the gutter being formed in part by an inner lip. Openings spaced around the perimeter of the pool are formed in the inner lip, and means are provided to close the openings when the water level in the gutter rea... | 11/13/1979 |
| 4170796 | Swimming pool with protective wall In a rectangular swimming pool suitable for use as a wave bath there is provided a rigid protective wall extending along and adjacent to the two longitudinal walls and one transverse wall and able to be raised above the level of the edge of the swimming p... | 10/16/1979 |
| 4133058 | Automated pool level and skimming gutter flow control system A fully automated pool level and skimming gutter flow control system is provided, automatically establishing and controlling pool level and skimming gutter flow under both normal and extraordinary pool use conditions, sensing changes in water level and wa... | 01/09/1979 |
| 4121307 | Positive flow swimming pool gutter A pool having an open gutter around its perimeter including a back wall, a bottom and an inner wall. A suction pipe extending around the perimeter of the pool at the bottom of the gutter connected to the suction side of a pump provides for positive withdr... | 10/24/1978 |
| 4112526 | Water level controller for swimming pool gutter A pool having a gutter around its perimeter, the gutter being formed in part by an inner lip. Openings spaced around the perimeter of the pool are formed in the inner lip, and means are provided to close the openings when the water level in the gutter rea... | 09/12/1978 |
| 4084272 | Swimming pools with overflow gutters A swimming pool includes an elongated plastic extrusion of channel-shaped configuration forming a gutter for receiving liquid which overflows from the pool. This gutter has an outer upper region connected with a concrete-retaining structure.... | 04/18/1978 |