Abstract: The present invention provides an aquarium filtering system having a pump housing and a filter assembly which is detachably secured to the pump housing for cleaning or replacement. The pump housing includes two conduits which register with and telescopically receive two conduits on the filter assembly as the filter assembly is connected to the pump housing thus fluidly connecting the pump housing and filter assembly together. A yoke is slidably mounted to the pump housing and movable between a locking and unlocking position. In its locking position, the yoke engages two locking tabs on the filter assembly thus mechanically attaching the filter assembly to the pump housing. Conversely, in its unlocking position, the yoke enables the filter assembly to be removed from the pump housing.

Abstract: The present invention provides a fluid filtering system for an aquarium having a tank in which water and marine animals are contained. The filtering system includes a pump, a filter element and a valve assembly fluidly connected therebetween. In addition, a pump actuator is movable between a first position and a second position in which the pump inlet and outlet are inverted. Actuation of the valve assembly to a first position and with the pump actuator in its first position allows the pump to pump water from the aquarium tank under pressure to and through the filter element after which the cleaned water is returned to the aquarium tank. Conversely, with the valve assembly and pump actuator in their second positions, the pump draws water from the aquarium tank, through the filter element and the cleaned water is then returned by the pump to the aquarium tank. Pressure pumping, i.e.

Abstract: A circulating system for an aquarium is provided in which a grid is positioned within the aquarium and disposed upwardly from the bottom of the aquarium to form a chamber between the grid and the bottom of the aquarium while gravel is disposed over the top side of the grid. A novel pump is provided for pumping the aquarium water to the chamber between the bottom of the aquarium and the grid whereby waste material and debris is collected on the underside of the gravel and eliminated by natural decay or backwashing of the gravel.

Abstract: A cover with novel hold down means is provided for a vehicle having an open bed, such as a pickup truck, for covering and enclosing the vehicle bed. The cover is constructed of a rigid or semirigid material and is hinged to one sidewall of the vehicle bed so that the cover can pivot upwardly from the other sidewall of the vehicle bed to permit access into the interior of the bed. In addition the novel hold down means comprises an elongated member which threadably engages a V-shaped member and both of which are inserted into a stake hole on the vehicle bed. Rotation of the member moves the V-shaped member upwardly to clampingly engage the interior of the vehicle sidewall.

Abstract: For use in conjunction with an aquarium having a layer of gravel, aggregate, or the like along its bottom, a device for removing the aggregate from the aquarium, cleaning the aggregate, and thereafter returning the aggregate to the aquarium. The device comprises a housing having an upper and a lower chamber with the upper chamber open to the lower chamber. A hinged closure lid sealingly covers and forms the bottom wall of the lower housing chamber. A fluid outlet from the upper chamber is coupled to the intake line of an aquarium pump while a tube is coupled at one end to an inlet in the upper chamber and is open at its other end to the aggregate in the aquarium. A sieve is operatively disposed between the inlet and outlet in the upper housing chamber so that aggregate drawn up through the tube and into the upper chamber by the pump is retained within the chamber while the filtrate is drawn through the sieve and out through the fluid outlet.

Abstract: An aquarium filter comprising a siphon housing assembly and a filter holding tank assembly. The siphon housing assembly supports a pump assembly which functions to draw water from the aquarium through the siphon housing assembly and to pump the water to the filter holding tank assembly. The pump assembly utilizes a centrifugal impeller to pump the water through a pump outlet to the filter holding tank assembly. In addition, a venturi outlet is provided in the pump assembly near the pump outlet which produces a venturi vacuum to siphon water from the aquarium and through the siphon housing assembly.The pump assembly pumps water from the siphon housing assembly into a filter bag situated in the filter holding tank assembly. The filter bag is porous and coated inside with diatomaceous earth for removing impurities from the aquarium water. The filter holding tank assembly includes an overflow return area for returning the filtered water to the aquarium.

Abstract: A receptacle containing gas and water adsorbent material for storing a pressurized breathable gaseous mixture for underwater use. The receptacle includes an auxiliary access plug for inserting the gas adsorbent material into the receptacle so that the material may be tightly packed within the receptacle and a screen to separate the gas adsorbent material from a conventional pressure reducing means.