An inflating device includes an air pump, a valve engaging head, and a pushing apparatus disposed on the air pump and selectively engaging and disengaging the valve engaging head. The valve engaging head includes a main body, a connection assembly coupled to the main body and having a connection hole for a Presta valve and another connection hole for a Schrader valve, and a valve seat movably disposed in the main body. The connection assembly has a receiving hole and the valve seat is movably disposed in the receiving hole. The pushing apparatus selectively contacts and disengages from the connection assembly. The pushing apparatus has a pushing portion adapted to drive the valve seat. The pushing apparatus engaging the valve engaging head includes the pushing portion pushing the first abutting portion, thereby driving the valve seat toward the second connection hole.

An inflatable cold-weather upper-body garment. The garment includes first and second pluralities of interconnected gas flow chambers, each plurality enclosed by gas-impermeable material; a fluid-flow channel connecting the first and second pluralities of gas flow chambers; and a hand-operable air pump in fluid communication with one of the gas flow chambers.

An inflatable cold-weather upper-body garment. The garment includes first and second pluralities of interconnected gas flow chambers, each plurality enclosed by gas-impermeable material; a fluid-flow channel connecting the first and second pluralities of gas flow chambers; and a hand-operable air pump in fluid communication with one of the gas flow chambers.

An air inflation device includes an inflation unit having a chamber in which air can be compressed to generate a high pressure air, and an air outlet channel communicating with the chamber. A pressure gauge unit includes a pressure gauge, a shaft extending outwardly from the pressure gauge and inserted into the air outlet channel, and a check valve sleeved on the shaft and movable between an open state for allowing the high pressure air in the chamber to flow into the air outlet channel, and a closed state for preventing the high pressure air in the air outlet channel to flow back into the chamber. An air guide unit is connected to the inflation unit for guiding the high pressure air to flow out of the air outlet channel.

An air inflation device includes an inflation unit having a chamber in which air can be compressed to generate a high pressure air, and an air outlet channel communicating with the chamber. A pressure gauge unit includes a pressure gauge, a shaft extending outwardly from the pressure gauge and inserted into the air outlet channel, and a check valve sleeved on the shaft and movable between an open state for allowing the high pressure air in the chamber to flow into the air outlet channel, and a closed state for preventing the high pressure air in the air outlet channel to flow back into the chamber. An air guide unit is connected to the inflation unit for guiding the high pressure air to flow out of the air outlet channel.

A combined paddle and pump can be used to propel a small boat. The handle telescopes with a locking nut that may be loosened to allow extension and retraction of the handle. The handle is hollow throughout and a pair of check valves are provided. One check valve opens when the handle is extended and the other opens when the handle is retracted. When one check valve is open, the other is closed. When the distal end of the paddle is placed within a volume of water or exposed to atmospheric, extension and retraction of the handle results in a fluid first being sucked into the hollow interior of the handle and then propelled out of the handle. A seal assembly prevents debris from binding tubes of the handle.

A pump includes a conduit defining an inner volume and formed from a flexible material, the conduit movable between an expanded state and a relaxed state. A coil is disposed within the conduit and includes an outer diameter that is approximately equal to an inner diameter of the conduit, the coil substantially maintaining its outer diameter when the conduit is moved between the relaxed state and the expanded state. A manifold is in fluid communication with the inner volume and is operable to permit fluid to enter the inner volume in a first mode and expel fluid from the inner volume in a second mode.

An air pump includes a cylinder, a piston rod, and an upper cover. The cylinder forms an opening at a top end thereof and at least one retaining hole adjacent to the opening. The piston rod is configured to be movable within the cylinder and provided with a piston forming a conical lateral face at one end thereof. The upper cover has a top portion forming a hole for the piston rod to penetrate therethrough, at least one extension portion extended from the top portion, and at least one retaining portion extended from the extension portion. The least one extension portion has an abutting edge selectively abutted against the conical lateral face. The retaining portion is engaged with the retaining hole.

A variable-pressure air pump includes a first cylinder with a first chamber and a second cylinder with a second chamber movably connected with one another. The second chamber fluidly communicable with the outside of the variable-pressure air pump selectively. A discharge device includes a connecting member and a switch movably connected with one another. The connecting member defines at least one discharge hole fluidly connecting with the second chamber. The switch has at least one flow guide portion and at least one blocking portion. The switch is movable between a first position in which the at least one flow guide portion is adjacent and opens to the at least one discharge hole and a second position in which the at least one blocking portion is adjacent to and blocks the at least one discharge hole.

An impact absorber is provided and is configured to be positioned between a protected object and an impacted object during use to prevent substantial damage to the impacted object from the impact of an external force. The impact absorber includes an outer absorption element and an inner absorption element positioned within the outer absorption element. The outer absorption element includes an outer wall enclosing a primary chamber, with the primary chamber configured to hermetically contain a first fluid under a first pressure, with the outer wall including an impacted side and a protected side, where the protected side is configured to be directed toward the protected object during use, and the impacted side is configured to be directed toward the impacted object during use. The first inner absorption element includes a first wall enclosing a first chamber, with the first inner absorption element being positioned within the primary chamber with the first chamber and being surrounded by the first fluid, where the first chamber is configured to hermetically contain a second fluid under a second pressure, with the second pressure being equal to or differing from the first pressure.