Abstract: An ampoule opener has an opening unit and a cover unit. The opening unit is a rigid frame and has two panels, two head-clamping holes and two pairs of wave-shaped flanges. The panels are respectively an upper panel and a lower panel. The head-clamping holes are elongated in length and tapered in width and are respectively formed through the panels. The pairs of wave-shaped flanges are formed between the panels and the head-clamping holes. The cover unit is flexible, is detachably mounted around the opening unit and has two covering boards, a mounting recess, two body-clamping holes and two pairs of wave-shaped edges. The body-clamping holes are elongated in length and tapered in width and are respectively formed through the mounting boards and communicate with the mounting recess. The pairs of wave-shaped edges are formed between the mounting boards and the body-clamping holes.

Abstract: A derailleur cable detecting assembly for an electric-auxiliary bicycle has a body and a detecting device. The body is mounted on a frame of the electric-auxiliary bicycle, is connected to a derailleur cable and has a casing and a cover. The casing has a chamber and a through hole. The cover is detachably mounted on the casing to mount a cable wire of the derailleur cable in the body. The detecting device is mounted in the body, is connected to the derailleur cable and has a circuit board and a magnetic element. The circuit board is mounted in the chamber of the casing, faces the cable wire and has an electric wire and multiple magnetic sensors. The magnetic sensors are mounted on the circuit board at intervals. The magnetic element is mounted on the cable wire between the casing and the cover, facing the magnetic sensors of the circuit board.

Abstract: A derailleur cable detecting assembly for an electric-auxiliary bicycle has a body and a detecting device. The body is mounted on a frame of the electric-auxiliary bicycle, is connected to a derailleur cable and has a casing and a cover. The casing has a chamber and a through hole. The cover is detachably mounted on the casing to mount a cable wire of the derailleur cable in the body. The detecting device is mounted in the body, is connected to the derailleur cable and has a circuit board and a magnetic element. The circuit board is mounted in the chamber of the casing, faces the cable wire and has an electric wire and multiple magnetic sensors. The magnetic sensors are mounted on the circuit board at intervals. The magnetic element is mounted on the cable wire between the casing and the cover, facing the magnetic sensors of the circuit board.

Abstract: A grease output device for an electrical grease gun has a body, a double-cam member and a driving member. The body has a holder and a seat mounted with the holder. The double-cam member connects to the body and has a driven unit and a driving unit. The driven unit has a driven gear and two cams misaligning with the driven gear. The driving gear has two rings mounted around the cams and two pistol rods connecting to the rings. The driving unit has a driving gear engaging with the driven gear. The driving member connects to the body to rotate the driving gear so the driven gear is rotated to push the rings. Hence, the grease can flow out of the body successively by the pistol two pistol rods moving back and forth alternatively.

Abstract: A grease output device for an electrical grease gun has a body, a double-cam member and a driving member. The body has a holder and a seat mounted with the holder. The double-cam member connects to the body and has a driven unit and a driving unit. The driven unit has a driven gear and two cams misaligning with the driven gear. The driving gear has two rings mounted around the cams and two pistol rods connecting to the rings. The driving unit has a driving gear engaging with the driven gear. The driving member connects to the body to rotate the driving gear so the driven gear is rotated to push the rings. Hence, the grease can flow out of the body successively by the pistol two pistol rods moving back and forth alternatively.

Abstract: A battery operated grease gun has a motor that drives a planetary gear assembly that is coupled to a pump assembly that drives a plunger reciprocally in an grease passage to discharge grease through a discharge spout. The pressure in the grease exerts a reaction force on the plunger that will change torque of the motor. The change of the torque of the motor will simultaneously effect voltage applied to the motor. When the voltage in the motor changes, an electronic pressure regulator measures the voltage in the motor to determine the pressure in the grease in the grease passage and stops the motor as the pressure in the grease reaches preset given valves in the pressure regulating device.

Abstract: A cam-driven pump mechanism for a battery-powered grease gun includes a cam driver and a cam-driven pump. The grease gun has a transition body having a grease channel and a casing having an inner chamber. The cam driver is mounted in the inner chamber. The cam-driven pump has a cylindrical cam, a sliding block, a follower and a piston. The cylindrical cam is rotatably mounted in the inner chamber, is rotated by the cam driver and has an eccentric annular groove. The sliding block is slidably mounted in the casing. The follower is securely attached to the sliding block and mounted slidably in the eccentric annular groove. The piston is mounted slidably in the grease channel and connects to the sliding block. Consequently, use of the cylindrical cam prevents localized friction on the sliding block and keeps the pump mechanism from wearing excessively.

Abstract: A battery operated grease gun has a motor that drives a planetary gear assembly that is coupled to a pump assembly that drives a plunger reciprocally in an grease passage to discharge grease through a discharge spout. The pressure in the grease exerts a reaction force on the plunger that will change torque of the motor. The change of the torque of the motor will simultaneously effect voltage applied to the motor. When the voltage in the motor changes, an electronic pressure regulator measures the voltage in the motor to determine the pressure in the grease in the grease passage and stops the motor as the pressure in the grease reaches preset given valves in the pressure regulating device.

Abstract: A screw gun to feed and drive collated screws includes a gun-shaped body with an opening, a motor, a screwdriver assembly, a bracket and a screw feed assembly. The screwdriver assembly is mounted in the body and includes a transmission assembly, a screwdriver and a clutch assembly. The transmission assembly is rotated by the motor, and the screwdriver is attached to the transmission assembly. The clutch assembly is mounted in the transmission assembly so the screwdriver will not be rotated by the transmission assembly without an axial load. The bracket is mounted in the opening of the body, and the screw feed assembly is slidably mounted in the bracket. In operation, the screw gun is pressed against a workpiece and the screw feed assembly slides into the body and indexes a screw for the screwdriver to screw.

Abstract: A portable electric tool with a mountable bi-directionally battery holder has a head, a handle, a tool holder and a battery holder. The tool holder is connected to a motor and is securely mounted on the head, and the handle is integrally formed with the head and has a bottom surface and a dovetail key. The battery holder is mounted on the bottom surface of the handle and has a pair of parallel channels that can contain the dovetail keys of the handle. When using the portable electric tool with a mountable bi-directionally battery holder in accordance with the present invention, users can rotate the connecting direction of the battery holder to provide a convenient way in use.