Abstract: A double shell structure for air pumps has an outer shell and an inner shell housed in the outer shell for installing an air pump body. The double shell structure can effectively reduce noise leakage resulting from air pump operation.

Abstract: A cooling pad for pets and particularly a novel cooling pad aims at overcoming the disadvantage of poor heat dissipation occurred to conventional cooling pads that are in close contact with the ground surface. It includes a base which has an upper surface forming bulged ribs to hold a cooling pad body and form an upper space, and a bottom surface having ridges connecting to bulged peripheral rims of the base to be in contact with the ground surface and with the rest areas forming an indented lower space. An anchor frame is provided that has a loop of retaining flange to couple with the cooling pad body and the base. The cooling pad body is spaced from the ground surface through the upper space and the lower space to facilitate heat dissipation and provide the pets a comfortable lying environment. In addition, the rough edges of the cooling pad body are covered to protect the pets from injury.

Abstract: A feeding apparatus and particularly a feeding apparatus capable of feeding pet fish or pets randomly or at a selected time interval. It includes a case and a control dock housed in the case. A first control button and a second control button are provided to selectively activate the motor on the control dock to operate at a selected time interval or randomly, thereby a feed box is driven to rotate synchronously. When the feed discharge outlet faces downwards, feeds are poured into a tank to feed the pet fish or pets. The control dock also has a main gear which has an axle coupling with a cam. The cam will trigger a microswitch to stop motor operation when reaches a selected location to achieve timer or random feeding for the pet fish or pets.

Abstract: An apparatus for adjusting temperature variation value correction of an aquarium heating tube and particularly an apparatus that is capable of adjusting temperature variation correction of an aquarium heating tube according to use conditions of the aquarium includes an adjusting dock with a duct extending upwards to house a screw rod. The screw rod has an upper end to fasten to a squared rotary rod which is extended outside an upper lid to couple with a spline round hole formed on a rotary knob. The screw rod has a lower end mating a biased member to accurately adjust the interval of a first electric contact of a movable strip and a second electric contact of an electrode thereby to control electric connection or break. By pulling the rotary knob away from the rotary rod and turning to a correcting temperature variation value, the heated temperature may be coincided with the actual water temperature.

Abstract: An improved warming bed for pets generates different temperatures on two opposite sides of the bed to warm different pets in different climate conditions. The warming bed includes an upper panel and a lower panel. The inner surfaces of the upper panel and the lower panel have corresponding coupling struts and stubs and at least one press strut to form a gap of a selected distance between the upper panel and the lower panel. A heating sheet is bonded to the inner surface of the lower panel (or the upper panel) and passes through the coupling struts and stubs. When the heating sheet is heated, the lower panel in contact with the heating sheet has a higher temperature than the upper panel which is remote from the heating sheet. Thus the two sides of the warming bed have different temperatures to meet different requirements.

Abstract: An improved aquarium heater and particularly an aquarium heater that has a protective device adjacent to an electric heating coil to cut off the electric circuit when the heater is overloaded to prevent the heating coil from continuously heating to avoid risks and hazards includes a glass tube housed a circuit board in an upper section thereof, a heating coil located below the circuit board connecting to the circuit board, a control plug sealed the top opening of the glass tube, and a protective device bridging the heating coil and the circuit board. The protective device cuts off circuit operation when total circuit is overloaded and overheated to ensure safely use of the heater.

Abstract: An air pump for a fish-tank comprises a compartmental air chamber assembly formed by a base plate and a casing in the body. Hence, an indirect prolonged air path is formed in the air chamber assembly, resulting in a great reduction of noise generated while operating.

Abstract: A fish egg-laying tank comprises a housing secured to a fish tank including a recess in the bottom having a plurality of openings on the top, an egg-laying container supported on the housing including an inverted cone-shaped member and a hole at the small end, an air chamber in the rear of housing in communication with the container, and a filter tank fitted in the recess. Water in the housing is flowed when air is pumped thereinto such that the solved feces of fishes are flowed onto the filter tank through the inverted cone-shaped member, the hole and the top openings of the recess and the eggs of fishes are dropped onto the bottom of the housing other than the filter tank through the inverted cone-shaped member and the hole.