Abstract: An inflation pump connector includes a housing a sliding groove extending along a longitudinal axis and a pressing device slidably received in the sliding groove. The pressing device includes an airtight ring and a clamping member. The clamping member includes a base and a first claw. The first claw includes a first clamping arm, a first pressing portion, a second clamping arm, and a first hollow portion. The first clamping arm is connected to the base. The first pressing portion is connected to an end of the first clamping arm opposite to the base. The second clamping aim is connected to the first pressing portion. The first hollow portion is disposed between the first clamping arm and the second clamping arm. The first pressing portion is movable towards the longitudinal axis and to squeeze and deform the airtight ring.

Abstract: 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.

Abstract: A pressure gauge adapted to be mounted in a containing recess of an air pump includes a housing arranged in the containing recess, a driving member movably arranged in the housing, a biasing member biasing the driving member toward the housing, a driven member configured to be driven to rotate by the driving member, a pointer needle connected with the driven member, a scale plate disposed between the driven member and the pointer needle, and a guiding member arranged between the housing and the driving member. The guiding member is configured to contact at least one of the housing and the driving member to remain the driving member moving relative to the housing in a straight direction.

Abstract: A valve connector includes a housing and a pressing device. The housing includes an operative end, a coupling end, and a through-hole extending from the operative end through the coupling end. The pressing device includes a push seat received in the through-hole and located between the lever and the coupling end and a lever abutting against the push seat and pivotably connected to the housing. The push seat includes a first passageway. The lever includes a second passageway and is operable to move the push seat. When the lever is in a release position, the first passageway does not intercommunicate with the second passageway. When the lever moves from the release position to a locking position, the push seat moves towards the coupling end, and the first passageway intercommunicates with the second passageway when the lever is in the locking position.

Abstract: A relief device in air pump includes a main body defining an interior space and a discharge hole fluidly communicating with the interior space. The discharge hole is selectively closed and opened by a valve device. The valve device is movable in the discharge hole. The discharge hole includes a first air sealing structure and the valve device includes a second air sealing structure and a third air sealing structure adapted to selectively contact with the first air sealing structure to prevent air flowing outside of the main body through the discharge hole and in addition at least one pressure releasing structure, located between the second and the third air sealing structures, adapted to cooperate with the first air sealing structure to delimit a gap therebetween for air to flow outside of the main body.

Abstract: An air compression pump includes a pump head and a pumping device fluidly connected with the pump head. The pumping device includes a cylinder fixed to the pump head. Further, a relief valve is fluidly connected with and received by the pump head. The relief valve defines a relief hole which is fluidly communicable with the first cylinder. The relief valve includes a valve body selectively closing the relief hole. The valve body is movable to an open position to relieve pressure in the air compression pump by allowing pressurized air to flow out of the air compression pump through the relief hole.

Abstract: 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 ii 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.

Abstract: 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.

Abstract: A relief device in air pump includes a main body defining an interior space and a discharge passage fluidly communicating with the interior space. The discharge passage is selectively closed and opened by a valve device. The valve device is movable in the discharge passage. The valve device includes a first sealing portion and a second sealing portion selectively engaging with the discharge passage. The valve device is movable between a first position in which one of the first and the second sealing portions engages with the discharge passage and a second position in which the other of the first and the second sealing portion engages with the discharge passage. The discharge passage has a length measuring from the first end to the second end thereof, which is smaller than a length which measures a separation distance between the first and the second sealing portions.

Abstract: 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.

Abstract: 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.

Abstract: A portable air pump includes an inflation assembly, a head seat pivotally connected to the inflation assembly, a pressure gauge disposed in the head seat, a connection assembly pivotally connected to the inflation assembly, and an axial member. The inflation assembly includes a cylinder and a piston rod moveable relative to the cylinder to compress the air inside the cylinder. One end of the head seat is provided with the containing groove, and another end of the head seat is provided with a pedal portion. The connection assembly is adapted to connect with an air-inflatable object. The axial member is mounted through the inflation assembly and the head seat and is connected to the connection assembly. The axial member is provided with an airflow channel communicating with the cylinder, the containing groove, and the connection assembly.

Abstract: A portable air pump includes an inflation assembly, a head seat pivotally connected to the inflation assembly, a pressure gauge disposed in the head seat, a connection assembly pivotally connected to the inflation assembly, and an axial member. The inflation assembly includes a cylinder and a piston rod moveable relative to the cylinder to compress the air inside the cylinder. One end of the head seat is provided with the containing groove, and another end of the head seat is provided with a pedal portion. The connection assembly is adapted to connect with an air-inflatable object. The axial member is mounted through the inflation assembly and the head seat and is connected to the connection assembly. The axial member is provided with an airflow channel communicating with the cylinder, the containing groove, and the connection assembly.

Abstract: An easy-to-assemble air pump includes a cylinder, a piston member, a valve seat, and a valve connector. The piston member includes a piston portion and a rod portion integrally formed as a monolithic member. The piston portion is axially movably arranged into the cylinder, and the rod portion is movably coupled to the cylinder for movement with respect thereto. The valve seat is arranged in the cylinder. The valve connector is connected to one end of the cylinder. Thus, the assembly process of the air pump can be simplified and the assembly time can be shortened.

Abstract: A three-stage compression air pump includes a pump head and a pumping device. The pumping device includes first and second cylinders and a plunger. The first cylinder is connected with the pump head and coupled to a first piston moving in the second cylinder. The second cylinder includes a first end cap and a second end cap respectively coupled to the two ends thereof. The first cylinder is inserted through the first end cap. The second end cap defines an orifice allowing outside air to flow into the second cylinder and includes a one-way valve preventing the air in the second cylinder from flowing outside the three-stage compression pump. The plunger is inserted in and movably coupled to the first cylinder and coupled to a second piston moving in the first cylinder and connected with the second end cap. The plunger is inserted through the first piston.

Abstract: A valve connector includes a connecting member, a threaded member, a joint member, and first and second connection assemblies. The connecting member is inserted into an axial hole of the threaded member to cause an abutting portion of the connecting member to enter into the axial hole. The joint member forms two threaded sections at two opposite ends thereof. The two threaded sections are alternatively detachably connected to a threaded portion of the threaded member so that a first seal ring of the first connection assembly and a second seal ring of the second connection assembly are alternatively removably abutted against the abutting portion for connecting a Schrader valve and a Presta valve.

Abstract: 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.

Abstract: An air compression pump includes a pump head and a pumping device fluidly connected with the pump head. The pumping device includes a cylinder fixed to the pump head. Further, a relief valve is fluidly connected with and received by the pump head. The relief valve defines a relief hole which is fluidly communicable with the first cylinder. The relief valve includes a valve body selectively closing the relief hole. The valve body is movable to an open position to relieve pressure in the air compression pump by allowing pressurized air to flow out of the air compression pump through the relief hole.

Abstract: An inflator valve connector includes a housing, a connection assembly, a valve seat, and a pushing member. The connection assembly is rotatably arranged in the housing and includes a first connection hole adapted to connect a Presta valve and a second connection hole adapted to connect a Schrader valve. The valve seat has a first abutting portion faced to the first connection hole and adapted to abut a lock nut of the Presta valve, and a second abutting portion faced to the second connection hole and adapted to abut a valve core of the Schrader valve. The pushing member removably contacts the connection assembly and has a pushing portion adapted to enter the housing via the first connection hole and to push against the first abutting portion, causing the valve seat to move relative to the housing and to close to the second connection hole.