Abstract: The present invention belongs to the field of animal gas anesthesia, and provides a quantitative and precise gas anesthesia method and device for experimental animals. The quantitative and precise gas anesthesia device for experimental animals includes an anesthetic fluid tank, a drainage tube, catheters, closed animal anesthetic tanks, and a recycling container, where anesthetic fluid is put into the anesthetic fluid tank, the bottom of the anesthetic fluid tank is connected to an inlet of the drainage tube, a set of holes are evenly arranged in the drainage tube, each hole is connected to an inlet of each catheter, and outlets of the catheters extend into the closed animal anesthetic tanks.

Abstract: A pool perimeter assembly extending along a portion of a pool perimeter includes a combined gutter assembly having a gutter conduit and a grate supported above the gutter conduit. The combined gutter assembly also has a partition dividing the gutter conduit to form an exhaust air plenum on one side of the partition. A surge tank is fluidly connected to through a modified converter box and a water-air line to the exhaust air plenum. An exhaust fan is connected to the surge tank and generates below atmospheric pressure so that the contaminated air on the pool surface is drawn through the grate and into the exhaust air plenum, through the water-air line, into the surge tank, and of the surge tank through the exhaust fan.

Abstract: A pool perimeter assembly includes conduits extending between the sidewalls, wherein the conduits are separated by a common wall between the sidewalls. A grate is positioned on the gutter apparatus to direct fluid flow into at least one of the conduits. The fluid flow may include water or air. A first length of the perimeter assembly includes conduits defining a gutter trough and an extra gutter, and the common wall defines a common opening between the conduits. A second length of the assembly includes two conduits defining a gutter trough conduit and an air evacuator conduit separated by a section of the common wall without the common opening. The evacuator conduit is connected to an air exhaust system to remove water vapor and contaminated air from the area surrounding the pool.

Abstract: A channel drain with a water stop is adapted for handling pool water in a swimming pool having a plastered surface. The channel drain, preferably a sump drain includes an elongated channel having a drain port and an opening for receiving pool water. A water stop abutting and substantially encircling the opening is formed into a trough for retaining and collecting the pool water. The drain is configured for installation in a pool with the water stop buried in the plastered surface, such that pool water seeping between the opening and the plaster is trapped by the trough, preventing the pool water from intruding beyond the plastered surface.

Abstract: A non-flexible floor covering adaptor is provided for use with a shower tray (10) having a peripheral trough (18) and means for engaging flexible floor covering material in the trough (18). The adaptor (30) comprises a first profiled portion (32) locatable in the trough (18) of the shower tray (10); a second profiled portion (34) which matches or substantially matches a peripheral edge of the shower tray (10), and a floor flange (36) for engagement with non-flexible floor covering material, such as tiles or boards.

Abstract: An apparatus captures and evacuates air from an area above a body of liquid, particularly a swimming pool. The apparatus exhausts the contaminants and water vapor to an area outside of an enclosure housing the swimming pool. A perimeter deck drain assembly extends around the pool and is connected to at least one conduit for collecting and draining deck water, at least one tray for directing the water in the conduit to a drain, a grating system for receiving water from the pool deck, at least one exhaust conduit, and at least one exhaust apparatus for directing the contaminants and water vapor to a desired area. The evacuation apparatus may be in the form of a bench positioned on a floor or deck surrounding a pool. The invention also provides an associated method for evacuating contaminants.

Abstract: A drain cover portion (100a, 100b) for a linear drainage system which comprises at least two attachment means. The attachment means are provided by at least one a connector attachment means (500) and at least one drain attachment means (700). The connector attachment means (500) is arranged to attach one or more anchor connectors (1002) for connecting an anchor (114) to the drain cover portion (100a, 100b) and/or one or more cover portion connector for connecting said drain cover portion (100a, 100b) to another drain cover portion (100a, 100b). The drain attachment means (700) is arranged to attach a drain portion (200) to the drain cover portion (100a, 100b). Each attachment means is arranged so as to allow the tool-less attachment of a connector/drain section.

Abstract: A set of parts having a “U” 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), drainage parts (1c), fitted steps, lane divider anchors, and curved edges. The upper surface of the prolongation slants toward the edge of the swimming pool at an angle of approximately 1 to 15 degrees and forms a base to place tiles to finish the appearance of the swimming pool. The parts can be constructed of ceramic, cement, stoneware, baked clay or other polymer.

Abstract: 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 support portion and is configured and dimensioned to bear on the side walls of the skimmer passageway to provide a leak-proof seal between the cover plate and the skimmer passageway. The gasket is pressed against the side walls of the skimmer passageway by a compression plate which is coupled to the cover plate by a nut.

Abstract: 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 surface having a plurality of openings thereon. The lower portion is joined to the upper portion, the lower portion including a substantially semi-circular surface sized to receive a tube section of a connector therein. In one embodiment, at least one of the first vertical surface and the second vertical surface includes a retention mechanism that is sized and positioned to retain the tube section in the lower portion. In another embodiment, the vertical surfaces are provided with interlocking interfaces.

Abstract: The invention pertains to the structure and a method of constructing of a swimming pool grating. The swimming pool has straight and curved edges and a gutter is constructed in the deck of the pool close to the edge including the curves. The grating is made of a multiple of grate bars which extend along the direction of the pool edge including the curves. The multiple grate bars are assembled in a longitudinal direction as well in a lateral direction according to the dimensions of the gutter. Once assembled into a grating in an elevated position, holes are drilled through all of the assembled grate bars in a lateral direction to the edge of the pool and rods are placed through the drilled holes and are fastened therein against any movement in any direction. Thereafter, the thus assembled grating is lowered into the gutter of the pool to be substantially flush with the surface of the pool deck and the level of the water in the pool.

Abstract: 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 belt is rotated, it removes debris from the skimmer to a point outside the skimmer where the conveyor belt deposits it into a receptacle.

Abstract: 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 covering preferably including either a tile or vinyl surface facing is attachable with a fastener that extends through the wall covering to the gutter wall and is releasably received in mating relation by the fastener receiving member. The fastener thereby retains the wall covering in abutment with and in covering relation to the sheet material of the gutter wall.

Abstract: 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 covering preferably including either a tile or vinyl surface facing is attachable with a fastener that extends through the wall covering to the gutter wall and is releasably received in mating relation by the fastener receiving member. The fastener thereby retains the wall covering in abutment with and in covering relation to the sheet material of the gutter wall.

Abstract: 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 extending about the periphery of the swimming pool adjacent the first gutter conduit and in fluid communication with the first gutter conduit for receiving water from the first gutter conduit for water flow in a direction toward a filtration and circulation system; and a plurality of water-spray tubes disposed within the second gutter conduit and extending transversely to the water flow through the second gutter conduit. Each water-spray tube includes a plurality of jet spray openings arranged to direct a spray of water within the second gutter conduit only in the direction of water flow toward the filtration and circulation system to propel and thereby increase water flow within the second gutter conduit.

Abstract: 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.

Abstract: 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, the said transverse rib being provided on its upper part with perpendicular slats projecting outwards and constituting the plantar span of the grating.

Abstract: 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 of a swimming pool as the retaining wall of the swimming pool,the modular unit comprising three bonded-together metal sheet portions:The first sheet being bonded in an exterior bond to the second sheet along a wall of the open first conduit; and to the second sheet along a wall of the closed second conduit, thereby completing the walls of the closed second conduit;the third sheet being bonded to the second sheet in exterior bonds along a wall of the open first conduit, thereby with the first sheet completing the walls of the open first conduit; and along a wall of the closed second conduit, thereby completing the walls of the closed third conduit.

Abstract: 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 deformations due to excessive loadings and impact. Ferro concrete material may be placed within channels formed by the vertical stiffeners to provide a support and a base upon which to set tile.

Abstract: 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 on opposite inside wall surfaces integral projections or recesses that form detents to latch the cover.A separate sheet bearing the proposed Abstract of the Disclosure is enclosed herewith for the Patent Office's convenience in amending the application.

Abstract: 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.

Abstract: 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 at their upper distal ends in a bifurcated formation defining an intervening space of selected cross-section. Adapted to overlie the trough in a removable mounting relation thereto is an apertured grating having elongated skirts downwardly depending from the longitudinal edges thereof. The skirts are insertable within the intervening spacing of the bifurcated trough formation in a springlike interfit enabling the grating to be removed and replaced as appropriate. Internally of the trough are a plurality of longitudinally spaced transversely arranged sleeves extending between openings in the opposite sidewalls.

Abstract: 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 swimming pool, defining a pool-side wall of an open gutter conduit adapted to carry water at a level below a predetermined level of water in the swimming pool, over the top of which wall water may flow from the pool into the gutter, the retaining wall comprising two generally U-shaped channels open along one side and having open interiors defined by side walls extending from a common base, the channels being arranged with the open sides facing one another and bonded together along the end faces of the side walls to a common divider plate closing off each channel and the interior spaces thereof, thereby forming separated conduits of each channel, one of said conduits being adapted to carry clean water feed to the pool and the other of said conduits being adapted t

Abstract: 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 positioned in the inlet opening to mount the deflector apparatus thereof, and readily adjustable mounting means on the deflector member and extensible member for mounting the deflector member in any one of multiple operative positions and inoperative positions.

Abstract: 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 water entrance slots communicating with the pool weir chamber, a plurality of vertical elongated water exit slots through the top rim of the gutter wall opposite to the pool side water entrance slots, a plurality of elongated water exit slots through the weir chamber wall below the top rim slots, an elongated float carried in the weir chamber, which float is responsive to the water level in the pool, to permit water to flow through the slots into the gutter for skimming, and into the weir chamber for float positioning and water skimming control, the weir chamber bottom wall having orifices to provide for controlled leakage of water out of the chamber into the gutter, from which it is removed, filtered and returned to the pool.

Abstract: 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 flow, comprising a tank; a filter bed of particulate material in the tank; a first inlet line communicating the swimming pool with the tank for gravity flow into the tank and maintaining a predetermined level of water in the tank in relation to a level of water in the swimming pool, thereby providing a head of water for gravity backwash flow through the filter bed; a second inlet line communicating the tank with the perimeter gutter for the swimming pool for gravity flow into the tank; a third inlet line communicating the tank with the perimeter gutter for the swimming pool for suction flow into the tank; an outlet line communicating the tank with the water recirculation system; a pump drawing a vacuum downstream of the filter bed and recirculating filtered wate

Abstract: 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. Each form board includes a panel of styrofoam rabbetted to temporarily hold, by means of adhesive tape, a plurality of tiles. The form boards are maintained in a preselected spacing by a plurality of transverse support frames temporarily attached to the form boards. Concrete is poured into the assembled forms to form the bond beam having a gutter and curb, and adheres to the back of the tiles. Upon removal of the form system, the bond beam with attached tiles is ready for finishing. The form system is reusable.

Abstract: 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.

Abstract: 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 swimming pool, defining a pool-side wall of an open gutter conduit adapted to carry water at a level below a predetermined level of water in the swimming pool, over the top of which wall water may flow from the pool into the gutter, the retaining wall comprising two generally U-shaped channels open along one side and having open interiors defined by side walls extending from a common base, the channels being arranged with the open sides facing one another and bonded together along the end faces of the side walls to a common divider plate closing off each channel and the interior spaces thereof, thereby forming separated conduits of each channel, one of said conduits being adapted to carry clean water feed to the pool and the other of said conduits being adapted t

Abstract: 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 angle to the horizontal in a direction away from the water's edge, and a plurality of passageways through the coping that are inclined downwardly from the overflow channel in a direction away from the water's edge. The overflow channel is disposed more closely adjacent the water side of the coping than adjacent the side of the coping remote from the water and is defined between two upright side walls, the passageways opening through that one of the side walls which is farther from the water. The coping on the water side of the channel is at the same horizontal level as the coping immediately on the other side of the channel.

Abstract: 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 gutter trough. A plate pivotally supported within a downwardly-sloped portion of the flow passage reduces flow through the housing in response to increasing levels of water in the trough. The plate closes the flow passage when the water in the trough exceeds a predetermined level to prevent flooding of the gutter and to prevent back flow of water from the gutter to the pool.

Abstract: 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 received in a horizontal slot in the rear wall of the gutter.

Abstract: 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 therefrom. The flow receiving member is formed as a hollow element having upper and lower flanges and a longitudinal channel between the flanges. The upper flange serves as the pool deck surface and has openings therein for passage of water through the upper flange into the channel. The collected water flows through the channel to a surge tank located at a level below the channel and remote from the pool. The channel can be sub-divided and the flow of the water in the channel can be regulated by control elements according to various requirements for heating, cooling or leaving the water untreated, the heating or cooling being effected by solar energy.

Abstract: 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 perimeter of a swimming pool, receiving overflow across a top edge thereof and adapted to carry water at a level below a predetermined level in the swimming pool; a drain line connecting the gutter conduit with the water recirculation system; suction means in series flow connection with the gutter conduit and drain line for positive withdrawal under suction of water from the gutter conduit and feed of such water to the water recirculation system for return to the pool; at least one of (a) means for controlling water recirculation capacity to accommodate any selected flow of water from the gutter to the water recirculation system; and (b) means for controlling suction flow from the gutter to the water recirculation system; and at least one water level-respons

Abstract: 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 flow controllers at spaced locations around the perimeter of the pool. Each of such controllers includes an adjustable hydrastatic gate, the operation of which is responsive to the bias of an adjustable spring means. The gutter flow controllers are selectively adjusted to establish the desired flow gradient along the gutter.

Abstract: 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 wall and a horizontal bottom wall extending forwardly from the lower edge of the rear wall. A front rim member is also molded from a tubular plastic material and has the lower wall thereof secured to the upper surface of the main gutter member near the front or free edge thereof. A perforated gutter cap rests atop the upper edge of the rear wall of the main gutter member and the juncture of the lip and rear wall of the tubular member which forms a seat for the front edge of the gutter cap. All of the members, i.e.