Abstract: An adjustable barbell or dumbbell or exercise device includes a handle having an end member, a spring biased latching element engaged in the end member, a weight member attached onto the end member and having an aperture for engaging with the spring biased latching element and for anchoring the weight member to the end member, a button is slidably engaged in the weight member for selectively depressing the spring biased latching element into the end member and for disengaging the spring biased latching element from the weight member and for allowing the weight member to be engaged onto and disengaged from the end member of the handle. The other outer weight members are attachable onto the weight member in series.

Abstract: An adjustable barbell or dumbbell or exercise device includes a handle having two end members, two carriers attached to the end members of the handle respectively, and a weight member having one or more latch members for detachably attaching to the end member of the handle, and a lock member slidably attached to the weight member and having a tongue for engaging with the carrier and for locking the weight member to the handle when the latch members of the weight member are rotated relative to the carrier, the other weight members are attachable to the weight member with the other latch members and the other lock member without supporting the weight members in a supporting base.

Abstract: An air valve connecting device or attachment includes a housing having an inlet mouth, a gasket engaged into the housing for engaging with an inflation valve, a casing engaged in the housing for compressing the gasket to grasp the inflation valve to the housing, and the casing includes a compartment communicative with the gasket for engaging with a valve piece which selectively blocks the casing, a spring biases the valve piece to engage with the casing, an actuator is engageble with the casing for compressing the gasket to grasp the inflation valve to the housing, and the actuator includes a valve member for preventing an air leaking problem from being occurred by the inflation valves.

Abstract: A chain link remover includes a seat having an opening formed between an anvil and a block for receiving a chain, the block includes a screw hole for engaging with a threaded shaft which includes a link ejector rod for engaging with a chain link pin of the chain and for removing the chain link pin from the chain, and a positioner is extended from one plate of a housing and located above the anvil for engaging with the chain and for stably retaining the chain in the opening of the seat. Two hooks are pivotally attached to the housing for engaging with the chain and for stably anchoring the chain to the housing.

Abstract: A tilting inversion exerciser includes a table rotatably supported on a supporting stand, a foot support attached to an extension of the table, a carrier attached to the extension, and a foot retaining device having a lever pivotally attached to the carrier, a foot anchor device attached to the lever and movable toward and away from the foot support of the extension, a latch member attached to the lever for engaging with the carrier and for adjustably anchoring the lever and the foot anchor device to the foot support of the extension at a selected angular position, and a lock device for locking the latch member to the lever and for giving some security to the user while conducting the inversion exercises.

Abstract: A hand air pump includes a connecting member having a barrel and an outlet port and a mouth, a receptacle having a cylinder engaged onto the barrel and having a slidable piston, the receptacle includes a channel for engaging with a cover plate which includes a longitudinal hole communicative with the mouth of the connecting member, and a gauge device includes a notch for receiving the receptacle and includes one or more latching members for retaining the gauge device to the receptacle and includes a connector engaged with the hole of the cover plate for receiving the pressurized air from the cylinder and for measuring an air pressure within the cylinder.

Abstract: A chain link remover includes a seat having an opening formed between an anvil and a block for receiving a chain, the block includes a screw hole for engaging with a threaded shaft which includes a link ejector rod for engaging with a chain link pin of the chain and for removing the chain link pin from the chain, and a positioner is extended from one plate of a housing and located above the anvil for engaging with the chain and for stably retaining the chain in the opening of the seat. Two hooks are pivotally attached to the housing for engaging with the chain and for stably anchoring the chain to the housing.

Abstract: A hand air pump includes a connecting member having a barrel and an outlet port and a mouth, a receptacle having a cylinder engaged onto the barrel and having a slidable piston, the receptacle includes a channel for engaging with a cover plate which includes a longitudinal hole communicative with the mouth of the connecting member, and a gauge device includes a notch for receiving the receptacle and includes one or more latching members for retaining the gauge device to the receptacle and includes a connector engaged with the hole of the cover plate for receiving the pressurized air from the cylinder and for measuring an air pressure within the cylinder.

Abstract: An adjustable dumbbell includes a handle, a shaft rotatably engaged through the handle, a carrier attached to each end portion of the shaft and having an inner housing and an outer housing and one or more middle housings spaced from each other for forming two or more gaps between the housings and for engaging with weight members, and the inner housing and the middle housing each include a spring-biased projection extendible into the gaps for selectively latching the weight members to the handle and the shaft and the carrier, and a control device is rotatably engaged onto the shaft and coupled to the handle for actuating the spring-biased projections to latch the selected weight members to the handle and the shaft and the carrier.

Abstract: A mouthpiece of a water bag includes a flexible body with a tunnel therein, a closed end at an end of the flexible body, and an elongated crack on the closed end adapted to communicate the tunnel, whereby the crack is closed at a normal condition and is opened when the flexible body is compressed along an elongated direction of the crack, a cap detachably covering the closed end of the flexible body, which has a strip and a ring fitted to a slot on the flexible body. The cap may isolate dust from the close end of the flexible body that keeps the crack clean. The crack is closed in a normal condition, and the ring fitted to the flexible body may restrict the flexible body to ensure the crack closed.

Abstract: A water bag of the present invention includes a soft bag with an intake, a lid detachably covering the intake of the bag, a hose having an end connected to the bag and a mouthpiece connected to a free end of the hose. The hose has a water inlet to inject water into the soft bag and a cap detachably covering the water inlet. Therefore, water may be injected through the water inlet directly without having to take the soft bag out of the backpack.

Abstract: A valve connector of an air pump includes a case with a channel and a guiding room therein. The channel is communicated with the guiding room. Two valve connector assemblies are provided in the case, each of which has a tunnel communicated with the guiding room, wherein the tunnels form apertures on a sidewall of the guiding room. A switching device is received in the guiding room and pivoted on the sidewall of the guiding room. The switching device has two arms on opposite sides of a pivot axle thereof. The arms are moved toward or away from the apertures respectively when the switching device is swung to close or open the apertures.

Abstract: A tilting inversion exerciser includes a table rotatably supported on a supporting stand, a foot retaining device for being powered and actuated to clamp and to retain ankle portions of the user to the table without being operated manually by the user. A motorized coupling device may move and adjust the table relative to the stand. A safety device may be used for switching off the foot retaining device to prevent the ankle portions of the user from being disengaged from the foot retaining device inadvertently when the table is operated by the user, particularly when the table and the user are rotated to a vertical position relative to the supporting stand and the ground.

Abstract: A tilting inversion exerciser includes a table rotatably supported on a supporting stand for supporting a user, two pivot coupling devices each having a middle axle for pivotally attaching to the supporting stand and each having one arm secured to the side portions of the table for offsetting the table from the axles of the pivot coupling devices, and a rotating device for rotating the pivot coupling device relative to the supporting stand, to rotate the table relative to the supporting stand. The table and the user may be supported and located on or closer to the center of gravity of the supporting stand, for being stably supported on the supporting stand particularly when the user is conducting the inversion exercises.

Abstract: An air pump has a cylinder, a shaft to be manipulative for inflation, a hose connected to the cylinder, a nozzle connected to an end of the hose and a handle pivoted on an end of the shaft. The handle is manipulative to be moved between an expanded position and a collapsed position. The handle is provided with a receiving portion to receive a portion of the shaft therein while the handle is moved to the collapsed position and an engaging portion to be engaged with the nozzle. The cylinder has a channel to receive the hose therein.

Abstract: A tilting inversion exerciser includes a table rotatably supported on a supporting stand with a pivot axle and a power actuating foot retaining device attached to the table for being powered and actuated to clamp and to retain ankle portions of the user to the table without being operated manually by the user. The table includes two fixed foot supports for supporting the feet of the user, a tube is attached to the table, a stem is slidably attached to the tube and has two foot anchor members movable to clamp the feet of the user to the table. A motorized and threaded coupling device may move and adjust the stem relative to the tube. The table includes a hand grip for supporting an operating device.

Abstract: A water bag includes a soft bag with an intake, a lid detachably covering the intake of the bag, a hose having en end connected to the bag and a mouthpiece connected to a free end of the hose. The present invention further provides a plastic deformation tube between the hose and the mouthpiece, which may be bent freely and fix the mouthpiece at a position after bending. Therefore, user may bend the plastic deformation tube to have the mouthpiece at a suitable position for drinking without having to hold the mouthpiece by hand.

Abstract: A mouthpiece of a water bag includes a flexible body with a tunnel therein, a closed end at an end of the flexible body, and an elongated crack on the closed end adapted to communicate the tunnel, whereby the crack is closed at a normal condition and is opened when the flexible body is compressed along an elongated direction of the crack, a cap detachably covering the closed end of the flexible body, which has a strip and a ring fitted to a slot on the flexible body. The cap may isolate dust from the close end of the flexible body that keeps the crack clean. The crack is closed in a normal condition, and the ring fitted to the flexible body may restrict the flexible body to ensure the crack closed.

Abstract: A water bag of the present invention includes a soft bag with an intake, a lid detachably covering the intake of the bag, a hose having an end connected to the bag and a mouthpiece connected to a free end of the hose. The hose has a water inlet to inject water into the soft bag and a cap detachably covering the water inlet. Therefore, water may be injected through the water inlet directly without having to take the soft bag out of the backpack.

Abstract: A valve connector of an air pump includes a case with a channel and a guiding room therein. The channel is communicated with the guiding room. Two valve connector assemblies are provided in the case, each of which has a tunnel communicated with the guiding room, wherein the tunnels form apertures on a sidewall of the guiding room. A switching device is received in the guiding room and pivoted on the sidewall of the guiding room. The switching device has two arms on opposite sides of a pivot axle thereof. The arms are moved toward or away from the apertures respectively when the switching device is swung to close or open the apertures.