Abstract: A pipe cutter has a body, a mounting sleeve, a drive segment and an operating head. The body has multiple wheels and an extension tube. The mounting sleeve is slidably mounted in the extension tube and has two elongated holes respectively formed through two opposite sidewalls of the mounting sleeve. The drive segment is mounted in the mounting sleeve and has a blade mount, a linking shaft and a spring. The blade mount is slidably mounted in the mounting sleeve and has a mounting recess, a mounting rod, a through hole, a holding pin and a blade. The linking shaft is slidably mounted in the mounting sleeve. The spring is mounted around the mounting rod and abuts the blade mount and the linking shaft to provide a damping effect to the blade. The operating head is rotatably connected to the mounting sleeve and is connected to the drive segment.

Abstract: A pipe cutter has a body, a mounting sleeve, a drive segment and an operating head. The body has multiple wheels and an extension tube. The mounting sleeve is slidably mounted in the extension tube and has two elongated holes respectively formed through two opposite sidewalls of the mounting sleeve. The drive segment is mounted in the mounting sleeve and has a blade mount, a linking shaft and a spring. The blade mount is slidably mounted in the mounting sleeve and has a mounting recess, a mounting rod, a through hole, a holding pin and a blade. The linking shaft is slidably mounted in the mounting sleeve. The spring is mounted around the mounting rod and abuts the blade mount and the linking shaft to provide a damping effect to the blade. The operating head is rotatably connected to the mounting sleeve and is connected to the drive segment.

Abstract: A luminescent refrigerant gauge device has a body, a luminescent board, a case, a switch and a driving circuit device. The body has a valve body and a gauge body assembly. The luminescent boards are mounted inside the gauge body assembly. The case is mounted on the body. The switch is mounted inside the mounting hole in the gauge housing. The driving circuit assembly is mounted on the top of the valve body and is connected with the switch and the luminescent board. When the luminescent refrigerant gauge device is in use, a user can clearly read the measuring result of the gauge device in a dark environment without using an additional light source.

Abstract: A check valve actuator has a body, a sliding seat, a drive shaft, a spring assembly and a knob. The body has a mounting collar, a convex ridge, an internal cavity and a through hole. The mounting collar is formed on the front end of the body and has an internal surface. The internal cavity is formed inside the body. The through hole communicates with the internal cavity. The sliding seat is mounted slidably against the internal surface of the internal cavity and has an annular seat. The drive shaft is extends through the internal cavity and the through hole in the body. The spring assembly is pressed between the closed rear wall of the internal cavity and the annular seat and the drive shaft. The knob is attached to the drive shaft at the rear end of the body.

Abstract: A gear puller has a screw shaft, a connecting seat, multiple paws and a fixed element. The screw shaft is attached to a shaft and has a hexagonal head and a tip. The connecting seat is connected rotatably to the screw shaft and has a body, a threaded stub and multiple arms. Each arm is formed on the body and has two hangers and a gap. The paws are pivotally mounted on the arms of the connecting seat and each has a pivotal axle and a hook. The pivotal axle is pivotally connected to the hangers on a corresponding arm, and the hook is formed on the action end to contact a circular element. The fixed element is mounted on the connecting seat and has a fixed board, a spring and a nut. The spring is mounted between the fixed board and the screw nut.

Abstract: The manual pipe bender has a stationary handle, a head, a bending die, a bending lever, and a bending handle. The stationary handle has a distal end, and the head is attached to the stationary handle. The bending die has a bending surface and multiple ratchet teeth. The bending lever attaches the bending die rotatably to the head. The bending handle is attached to and rotates the bending die around the head and has a drive bracket that engages a selected ratchet tooth on the bending die to keep the handles from crossing. Consequently, bending acute angles in pipes is convenient.

Abstract: A tube bender includes a stepped handle having a second end portion with a level higher than that of a first end portion. A passage is defined in the second end portion of the handle for receiving a pushing rod. An L-shaped supporting base is fixedly mounted on the first end portion of the handle and has a vertical section on which a tube-bending block is mounted. An L-shaped driving ever has a vertical section pivotally mounted on an underside of the second end portion of the handle. A driven member is mounted between the vertical section of the driving lever and an underside of the pushing rod for moving the pushing rod, which in turn moves two auxiliary tube-bending blocks toward the tube-bending block.