Abstract: A pneumatic tool includes a motor, a drive mechanism connected to the motor and adapted to drive a piston, and a cylinder filled with high-pressure gas. The piston is accommodated in the cylinder and suitable for a reciprocating motion within the cylinder. The piston is connected to a striking element suitable for striking a workpiece. The drive mechanism includes a blade fixed to the piston and a gear coupled to the motor. The gear includes a plurality of teeth adapted to engage with a plurality of lugs on the blade such that a rotation of the gear is transformed to a linear movement of the blade. The pneumatic tool further includes an electronic device adapted to lock the blade.

Abstract: A method of detecting a workpiece jam condition in a pneumatic tool includes striking a workpiece by a blade of the tool, detecting whether a piston to which the blade is attached reaches a predetermined position within a predetermined time, and determining a workpiece jam condition has occurred if the piston does not reach the predetermined position within the predetermined time.

Abstract: In some implementations, a desiccant assembly within a sensor housing may include a desiccant chamber configured to hold a desiccant element; a transfer window positioned between the desiccant chamber and a sensor chamber of the sensor housing; and a permeable membrane covering the transfer window and configured to allow water vapor to transfer from the sensor chamber to the desiccant chamber.

Abstract: A fastener tool includes a motor, a drive mechanism connected to the motor and adapted to drive a piston, and a cylinder filled with compressed gas. The piston is accommodated in the cylinder and suitable for a reciprocating motion within the cylinder. The drive mechanism includes a blade fixed to the piston, and a gear coupled to the motor. The gear contains a plurality of teeth adapted to engage with a plurality of lugs on the blade such that a rotation of the gear is transformed to a linear movement of the blade. The drive mechanism further includes a disengagement module which within a period of a rotation cycle of the gear, is configured to prevent one of the plurality of teeth from unintentionally engaging with a misaligned one of the lugs.

Abstract: A fastener tool includes a motor, a drive mechanism connected to the motor and adapted to drive a piston, and a cylinder filled with high-pressure gas. The piston is accommodated in the cylinder and suitable for a reciprocating motion within the cylinder. The drive mechanism includes a blade fixed to the piston and a gear coupled to the motor. The gear contains a plurality of teeth adapted to engage with a plurality of lugs on the blade such that a rotation of the gear is transformed to a linear movement of the blade. The drive mechanism further includes a disengagement module which, within a period of a rotation cycle of the gear, is configured to prevent one of the plurality of teeth from unintentionally engaging with a misaligned one of the lugs.

Abstract: A pneumatic tool is provided comprising: a motor; a drive mechanism connected to the motor; a cylinder; the drive mechanism comprising a drive bar connected to a piston, the drive bar adapted to drive the piston in a linear direction; the cylinder filled with high pressure gas; wherein the piston is housed in the cylinder and adapted to reciprocate within the cylinder; the piston is connected to a striking member adapted to strike a workpiece; wherein the drive mechanism further comprises a plurality of latching members adapted to be in contact with and lock the drive bar. The latching structure provided by the present invention has a smaller sliding distance and is safer than conventional drive bar latching structures.

Abstract: A fastener tool includes a motor, a drive mechanism connected to the motor and adapted to drive a piston, and a cylinder filled with high-pressure gas. The piston is accommodated in the cylinder and suitable for a reciprocating motion within the cylinder. The drive mechanism includes a blade fixed to the piston and a gear coupled to the motor. The gear contains a plurality of teeth adapted to engage with a plurality of lugs on the blade such that a rotation of the gear is transformed to a linear movement of the blade. The drive mechanism further includes a disengagement module which, within a period of a rotation cycle of the gear, is configured to prevent one of the plurality of teeth from unintentionally engaging with a misaligned one.

Abstract: A method of detecting a workpiece jam condition in a pneumatic tool includes striking a workpiece by a blade of the tool, detecting whether a piston to which the blade is attached reaches a predetermined position within a predetermined time, and determining a workpiece jam condition has occurred if the piston does not reach the predetermined position within the predetermined time.

Abstract: A pneumatic tool is provided comprising: a motor; a drive mechanism connected to the motor; a cylinder; the drive mechanism comprising a drive bar connected to a piston, the drive bar adapted to drive the piston in a linear direction; the cylinder filled with high pressure gas; wherein the piston is housed in the cylinder and adapted to reciprocate within the cylinder; the piston is connected to a striking member adapted to strike a workpiece; wherein the drive mechanism further comprises a plurality of latching members adapted to be in contact with and lock the drive bar. The latching structure provided by the present invention has a smaller sliding distance and is safer than conventional drive bar latching structures.

Abstract: An intelligent switch system with reduced power consumption includes a wireless gateway, single live line intelligent switches, and one load per single live line intelligent switch. The wireless gateway generates wake-up signal, couples the wake-up signal to the alternating current power source network, and sends a control signal to all the intelligent switches. Each switch includes first wireless communication unit with sleep mode and wake-up mode, first wake-up unit, first controller, and switch unit. Every first wireless communication unit in wake-up mode receives the control signal. Every first wake-up unit receives and the wake-up signal to wake-up the first wireless communication unit if the control signal is tailored for that switch. The first controller analyzes the control signal and outputs a switch signal, the switch unit changes the on or off state of the load accordingly. When the switch unit is turned off, the current flowing is less than 50 uA.

Abstract: An intelligent switch system with reduced power consumption includes a wireless gateway, single live line intelligent switches, and one load per single live line intelligent switch. The wireless gateway generates wake-up signal, couples the wake-up signal to the alternating current power source network, and sends a control signal to all the intelligent switches. Each switch includes first wireless communication unit with sleep mode and wake-up mode, first wake-up unit, first controller, and switch unit. Every first wireless communication unit in wake-up mode receives the control signal. Every first wake-up unit receives and the wake-up signal to wake-up the first wireless communication unit if the control signal is tailored for that switch. The first controller analyzes the control signal and outputs a switch signal, the switch unit changes the on or off state of the load accordingly. When the switch unit is turned off, the current flowing is less than 50 uA.

Abstract: A liquid crystal display includes a liquid crystal panel switchable between normal mode for displaying images and standby mode, a control circuit coupled to the liquid crystal panel controlling the liquid crystal panel mode according to video signals transmitted thereto, and a power board providing a power voltage to the control circuit. When the liquid crystal panel is in a standby mode, the control circuit outputs a corresponding feedback signal to interrupt power voltage supply from the power board to the control circuit.

Abstract: New cutting structures for roller cone drill bits are disclosed. In one aspect, a drill bit includes a bit body, roller cones attached to the bit body and able to rotate with respect to the bit body, and a plurality of cutting elements disposed on each of the roller cones, such that axial force on the bit during drilling is substantially balanced between the cones. In another aspect, a drill bit includes a plurality of cutting elements disposed on each roller cone such that the amount of work performed by each cone during drilling is substantially the same as the amount of work performed by each of the other cones. In yet another aspect, a drill bit includes a plurality of cutting elements disposed on each roller cone such that distribution of axial force on the bit is optimized. Additional aspects of the invention are also disclosed.

Abstract: A liquid crystal display includes a liquid crystal panel switchable between normal mode for displaying images and standby mode, a control circuit coupled to the liquid crystal panel controlling the liquid crystal panel mode according to video signals transmitted thereto, and a power board providing a power voltage to the control circuit. When the liquid crystal panel is in a standby mode, the control circuit outputs a corresponding feedback signal to interrupt power voltage supply from the power board to the control circuit.

Abstract: A roller cone drill bit is disclosed which includes a bit body adapted to be coupled to a drill string, a bearing journal depending from the bit body and a single roller cone rotatably attached to the journal. The roller cone has a plurality of inserts disposed thereon. In one aspect, the inserts have an extension length of at least 0.6 inches. A roller cone drill bit is disclosed, including a bit body, a bearing journal depending from the bit body, and a single roller cone rotatably attached to the journal. The roller cone has a plurality of inserts disposed thereon. In another aspect, the inserts are arranged such that at most about 20 percent of the inserts are crossed substantially at centerlines thereof by any single plane which contains the axis of the cone axis 10 and which crosses at least two of the inserts.

Abstract: New cutting structures for roller cone drill bits are disclosed. In one aspect, a drill bit includes a bit body, roller cones attached to the bit body and able to rotate with respect to the bit body, and a plurality of cutting elements disposed on each of the roller cones, such that axial force on the bit during drilling is substantially balanced between the cones. In another aspect, a drill bit includes a plurality of cutting elements disposed on each roller cone such that the amount of work performed by each cone during drilling is substantially the same as the amount of work performed by each of the other cones. In yet another aspect, a drill bit includes a plurality of cutting elements disposed on each roller cone such that distribution of axial force on the bit is optimized. Additional aspects of the invention are also disclosed.

Abstract: A roller cone drill bit is disclosed which includes a bit body adapted to be coupled to a drill string, a bearing journal depending from the bit body and a single roller cone rotatably attached to the journal. The roller cone has a plurality of inserts disposed thereon. In one aspect, the inserts have an extension length of at least 0.6 inches. A roller cone drill bit is disclosed, including a bit body, a bearing journal depending from the bit body, and a single roller cone rotatably attached to the journal. The roller cone has a plurality of inserts disposed thereon. In another aspect, the inserts are arranged such that at most about 20 percent of the inserts are crossed substantially at centerlines thereof by any single plane which contains the axis of the cone axis 10 and which crosses at least two of the inserts.

Abstract: An earth-boring bit for drilling a borehole comprises a bit body having a bit axis, at least two rolling cone cutters rotatably mounted on the bit body, a plurality of inner row cutter elements positioned on at least one cone cutter in a first inner row, a plurality of gage-cutting cutter elements positioned in a first fanned-gage row on a first one of the one cutters, and a plurality of gage-cutting cutter elements positioned in a second fanned-gage row on a second one of the one cutters, wherein the gage-cutting cutter elements on the bit define a gage curve and cutter elements in the first fanned-gage row and the second fanned-gage row contact the gage curve at different points. In one embodiment, each cutter element has an extension, and the extensions of the uppermost fanned-gage row cutter element and the first inner row cutter element define a step distance such that the ratio of the step distance to the extension of the first inner row cutter element is greater than 0.5.

Abstract: New cutting structures for roller cone drill bits are disclosed. In one aspect, a drill bit includes a bit body, roller cones attached to the bit body and able to rotate with respect to the bit body, and a plurality of cutting elements disposed on each of the roller cones, such that axial force on the bit during drilling is substantially balanced between the cones. In another aspect, a drill bit includes a plurality of cutting elements disposed on each roller cone such that the amount of work performed by each cone during drilling is substantially the same as the amount of work performed by each of the other cones. In yet another aspect, a drill bit includes a plurality of cutting elements disposed on each roller cone such that distribution of axial force on the bit is optimized. Additional aspects of the invention are also disclosed.