267results about How to "Sufficient torque" patented technology

The present invention discloses an adjustable base for a portable saw and a portable saw therefore. The base includes a longitudinal shell secured to the housing, and mounted to a baseplate. A shaft is mounted to the housing extending through a slot formed in the shell. A collar is connected to the shaft and has a first cam surface cooperating with a corresponding second cam surface of the housing. Rotation of the collar in an unlocked direction extends the shaft away from the housing. A clamp member is received within a shell inner region and cooperates with the shaft. The shaft is threadably engaged to one of the collar, the housing or the clamp member so that rotation of the collar in the unlocked direction either extends the shaft further away from the housing or extends the clamp member along the shaft away from the housing.

A spark-ignition gasoline engine having at least a spark plug, the engine including an engine body having a geometrical compression ratio set at 14 or more, and an intake valve and an exhaust valve provided, respectively, in intake and exhaust ports connected to each of a plurality of cylinders of the engine body. The intake and exhaust valves are adapted to open and close corresponding respective ones of the intake and exhaust ports. The engine further includes an operation-state detector adapted to detect an operation state of the engine body and a control system adapted, based on detection of the operation-state detector, to perform at least an adjustment control of an ignition timing of the spark plug, the control system being operable, when an engine operation zone is a high-load operation zone including a wide open throttle region within at least a low speed range, to retard the ignition timing to a point within a predetermined stroke range just after a top dead center of a compression stroke.

The invention discloses a small crawler-type cleaning device. The small crawler-type cleaning device comprises a shell, a handle device arranged on the upper portion of the shell, a liquid adding mechanism, a water squeezing mechanism and a cleaning mechanism; the liquid adding mechanism comprises a button cavity formed in the handle device, a liquid adding button located in the button cavity and a water tank fixed in the shell; the water squeezing mechanism comprises a water squeezing switch, a liftable roller mechanism arranged on the top of the shell and a suction box fixed in the middle of the shell; the cleaning mechanism comprises two hollow crawler wheels, a crawler belt installed on the outer edges of the crawler wheels, a cleaning cloth layer arranged on the surface of the crawler belt and driving motors, wherein each driving motor is arranged in a hollow cavity of the corresponding crawler wheel and used for driving the crawler wheel to walk. According to the small crawler-type cleaning device, the liquid adding mechanism, the water squeezing mechanism and the cleaning mechanism are combined, the structure is compact, use is convenient, carrying and storing are convenient, and the time and the physical power are saved by adopting the motor driving mode.

A pitch drive system for a wind turbine is provided which comprises a regulation drive for regulating the pitch of a rotor blade of the wind turbine during normal operation, the regulation drive comprising at least one drive train, and an emergency drive for pitching the rotor blade in case of emergency, the emergency drive comprising at least one drive train, wherein the at least one drive train of the emergency drive is separate from the at least one drive train of the regulation drive.

A power generator is provided having one or more reservoirs. Each reservoir has an inlet and an outlet. A float is disposed in each reservoir. A shaft is connected to each float. Controls are provided for actuating each inlets and outlet to cause water to flow into and out of each reservoir via its corresponding inlet and outlet, respectively. As a result, the flowing water moves each float in a vertically oscillating manner to rotate the shaft at an output a rate suitable to generate usable power. Also provided are a method for generating electricity and an energy converter that converts vertical float movement into rotational energy.

The present invention discloses an adjustable base for a portable saw and a portable saw therefore. The base includes a longitudinal shell secured to the housing, and mounted to a baseplate. A shaft is mounted to the housing extending through a slot formed in the shell. A collar is connected to the shaft and has a first cam surface cooperating with a corresponding second cam surface of the housing. Rotation of the collar in an unlocked direction extends the shaft away from the housing. A clamp member is received within a shell inner region and cooperates with the shaft. The shaft is threadably engaged to one of the collar, the housing or the clamp member so that rotation of the collar in the unlocked direction either extends the shaft further away from the housing or extends the clamp member along the shaft away from the housing.

A start system for a gas turbine engine delivers starter current according to a schedule selected according to measured rotational speed and oil temperature of the gas turbine engine.

A pitch drive system for a wind turbine is provided which comprises a regulation drive for regulating the pitch of a rotor blade of the wind turbine during normal operation, the regulation drive comprising at least one drive train, and an emergency drive for pitching the rotor blade in case of emergency, the emergency drive comprising at least one drive train, wherein the at least one drive train of the emergency drive is separate from the at least one drive train of the regulation drive.

A powered valve actuator assembly converts a manually operated valve without removal of the valve handle for automated valve operation in response to detection of a preselected condition. The design incorporates a motor, motor control circuit, drive shaft, valve handle engaging member and anti-rotation member. The motor is supported by its drive shaft, which is mounted on the valve handle via an adaptor. The motor, when operated, applies rotational torque to the drive shaft, and is secured from counter rotation about the drive shaft by the anti-rotation member, which extends between the motor and a fixed reference point with respect to the valve body such as the conduit or an extension thereof. The control circuit may incorporate a monitoring sub-circuit and power regulator, which operates at reduced power levels depending on the sensed state of the sensor or sensors.

An electrically operated drive controller includes first and second electric current command value calculation processors, for calculating first and second electric current command values from a target value of torque of an electrically operated machine; a voltage command value calculation processor, for calculating a voltage command value from the first and second electric current command values; and first and second adjusting value calculation processor, for calculating first and second adjusting values. The first electric current command value calculation processor includes first electric current command value adjustment processors, for adjusting the first electric current command value by the first adjusting value, and an electric current limit processor, for limiting the adjusted first electric current command value. The second electric current command value calculation processor includes a second electric current command value adjustment processor, for adjusting the second electric current command value by the second adjusting value.

A compressor driver for a compressor is provided, wherein at the start of the compressor, a phase of the current flowing in the motor is controlled to be ahead of an induction voltage, then the advancement of the phase is controlled to decrease. Under an unstable condition to detect a position, such as at the start under pressure-difference, the foregoing control allows the phase to advance up to the current-phase where the max. torque can be produced, thereby drawing the instantaneous max. torque of the motor for starting the compressor. Then the control reduces the advancement for obtaining a stable operation.

The present invention provides an apparatus for fixing a steel wire of a wale, which comprises the following components: a fixing body which is cross-beam-shaped, wherein a first end of the fixing body is combined with one end of a prestressed wale, the fixing body is provided with a coupling hole and penetration of one end of the steel wire of the wale through the coupling hole is allowed; an arrester which projects from a front surface of the fixing body for improving shearing force resistance of the fixing body; a guiding plate which has a preset curvature and is integrated with an inner surface of the fixing body for guiding the steel wire to be inserted into the fixing body; and a cushion block which is provided at a second end of the fixing body and fixes the end of the steel wire of the wale.

The invention relates to a double-stator conical adjustable air gap permanent magnet motor, which relates to the field of motors and solves the problem that the prior permanent magnet motor with a conventional structure has low efficiency. An outer stator core, a rotor and an inner stator core are coaxially sleeved together from outside to inside in turn, equal inside air gaps and outer air gaps are formed between the stator core and the rotor, both the outer surface of the inner stator core and the inner surface of the rotor are conical surfaces or cylindrical surfaces, and both the outer surface of the rotor and the inner surface of the outer stator core are conical surfaces or cylindrical surfaces; and a rotor slideway is arranged on an annular opening of a rotor output shaft of a supporting rack, the other rotor slideway is arranged at the end position of an inner rotor of the supporting rack, the rotor output shaft passes through a rotor slideway and is fixed on the supporting rack, the end part of the rotor passes through the other rotor slideway and is fixed in the supporting rack, and the rotor also comprises an air gap adjusting mechanism which is arranged between the end part of the rotor and the other rotor slideway. The double-stator conical adjustable air gap permanent magnet motor has the advantages of good adjusting performance, wide speed-expanding range and sufficient torque.