Abstract: A control structure for a window covering includes a base, a revolving wheel having an axial post, a restriction means including a bushing fitting around the axial post, a transmission member provided on a side of the bushing, and at least one pawl connected to the axial post. The revolving wheel is connected to the base. The restriction means has at least one cutting groove. The transmission member has at least one abutting portion on an inner wall thereof. The pawl is pivotable within a width of the cutting groove. When the revolving wheel is rotated forward, an end of the pawl passes through the cutting groove to mesh with the abutting portion. When the revolving wheel is rotated backward, the pawl disengages from the abutting portion, and the transmission member is rotatable relative to the revolving wheel. Whereby, it could prevent generating noise while operating the window covering.

Abstract: The present disclosure relates to a drilling robot and a method for controlling a drilling robot including a driven mechanical structure allowing to place a drilling tool in a sequence of drillings programmed in terms of position and orientation of the drilling of a part such as a technical skin. The method includes a step of determining the acceleration of the drilling tool at the end of the approach on a drilling position, then also testing a stabilization condition of the drilling tool to finally establish a drilling authorization.

Abstract: A drilling tool includes a spindle, a housing at least partly housing the spindle, a feed gear drivingly connected to a motor and threaded around the spindle to feed the spindle in an axial direction of the spindle by mutual rotation between the feed gear and spindle during a drilling process, and a micro peck unit which includes an undulated cam profile and a follower arranged to bear against the cam profile, and which produces an oscillating movement of the feed gear and the spindle upon rotation of the feed gear during a drilling process. The micro peck unit further includes interposable rolling elements arranged to be re-positioned into a gap between two circular contact surfaces in order to separate the cam profile from the follower, such that no oscillating movement is produced by the unit when the interposable rolling elements are positioned inside the gap between the contact surfaces.

Abstract: An electric tool includes a housing accommodating a motor, and a break device and an operational member to turn on and turn off a drive switch of the motor. The brake device includes a brake plate fixed to an output shaft of the motor, a brake member is capable of moving toward and away from the brake plate during rotation, and an urging unit urging the brake member toward an abutment position where the brake member abuts on the brake plate. The operational member is provided with a press member that comes into abutment on the brake member through an operation of turning on the drive switch of the motor and rotates the brake member in such a rotational direction as to move away from the brake plate against the urging of the urging unit.

Abstract: The present invention includes a section (102) for generating a plurality of contributing random numbers using a random number, a section (110) for generating a plurality of contributing data using a plurality of contributing random numbers, a section (103) for selecting a number designating contributing data, a section (104) for generating a commitment of the number, a section (126) for saving a contributing random number of the number and disclosure information of the commitment, a section (125) for sending the plurality of contributing data and the commitment, section (134) for generating auxiliary data using a contributing data set and the contributing random number, wherein the auxiliary data and the disclosure information of the commitment are sent from the section (125), and a section (139) for generating a shared key using the contributing data set, the disclosure information of the commitment, the auxiliary data, and the contributing random number.

Abstract: It is an object of the invention to provide an effective technique for avoiding the influence of reaction during tightening operation in the rotary fastening tool.

Abstract: A brake assembly is configured for a strapping tool tensioning motor. The brake assembly includes a one-way bearing operably connected to the motor output shaft. The bearing has at least two stop members. A brake element is mounted to the motor movable toward and away from the bearing for movement into and out of engagement with one of the bearing stop members. A brake release is connected to the brake element. The brake element is biased into engagement with a bearing stop member. When the brake is engaged with the bearing stop member, the motor can freely rotate in the first direction and cannot rotate in the second reverse direction. The brake release moves the brake element out of engagement with the one of the bearing stop members and the motor can freely rotate in the second reverse direction until the brake release is reengaged with one of the bearing stop members.

Abstract: A hydraulic drilling machine has a metal chassis shaped as a rectangular parallelepiped, drilling resources located at the front of the chassis, a rotary motor to drive drilling rods, and a hydraulic circuit. An electrical circuit powers the various components of the drilling machine. The machine can be mounted on the arm of a hydraulic mini-digger and operate without an extra hydraulic unit.

Abstract: A drill rig includes a carrier platform and a drilling unit carried by the carrier platform. The drilling unit includes a support frame pivotally mounted on the carrier platform, a slider frame slidably mounted upon and surrounding the support frame, a drilling support mechanism mounted on the slider frame, a drill portion rotatable relative to said drilling support mechanism, and a power means for effecting rotation of the drill portion. When a drilling operation is to be effected, the support frame is pivotally moved to assume a substantially vertical position, and the slider frame is slidably moved along the support frame to an operative position for effecting a drilling operation. The support frame comprises two main tower beams partially covered in High-Density Polyethylene (HDPE) plastic, and the slider frame which surrounds the support frame comprises plates positioned on the top and bottom of the tower beams, with inside and outside joiner plates encasing the sides of the support frame.

Abstract: The invention provides an apparatus (2) for imparting relative movement between an oscillating member and a rail (4). The apparatus (2) comprises a support (6) in the form of a housing providing a fulcrum (8) and biasing means (10) to bias a lever (18) about the fulcrum (8). The lever (18) has an engaging formation (20) spaced apart along its length from the fulcrum (8). The engaging formation (20) is configured to selectively grip and release the rail (4). In one embodiment of the inventions application, the housing (6) is secured to a percussion rock drill and the rail (4) secured in a position to allow drilling as desired. The lever (18) supports the rock drill above the rail (4). The oscillation of the drill and housing causes the lever (18) to pivot about the fixed fulcrum (8) against the bias of the biasing means (10). This disengages the grip of the engaging formation (20) and the drill is advanced along the rail (4).

Abstract: An electric power tool has a motor-driven circular tool that can be clamped by means of a clamping device. A mechanical braking device (2) serves to brake the tool. A safety element (4) prevents improper handling of the electric power tool. In a safety position, the safety element (4) prevents the motor from being turned on and activates the braking device (2). In a release position, the safety element (4) allows the motor to be turned on and the braking device (12) is released. An additional locking mechanism prevents that a clamping lever, needed to actuate the clamping device, can be actuated in the clamped state in the safety position. In the release position of the safety element, the locking mechanism is unlocked.

Abstract: A control is provided for a drill head that is mounted on a drill mast. Hydraulic motors raise and lower the drill head and a hydraulically releasable brake holds the drill head in position on the mast. The control has a hoist line that connects the hydraulic motors to a source of hydraulic fluid under pressure. A brake release line is connected to the brake and a brake release valve normally connects the brake release to a tank. The brake release valve is electrically actuated to connect the brake release line to a source of hydraulic fluid under pressure to release the brake. A programmable logic controller with a memory storage controls the actuation of the brake release valve. A pressure transducer is connected to the hoist line and to the controller for providing a signal to the controller representative of the hoist line pressure and this signal is storable in the memory.

Abstract: A mole launcher which has a hydraulically powered, double-acting piston and cylinder unit to push or pull a slider. The slider carries a drill head connected to a drill string. The other end of the drill string carries a mole to bore an underground passage. By releasably locking the slider to the front of the launcher, the cylinder can be moved between a first position in which it projects beyond the chassis of the launcher, and a second position in which it is placed only within the length of the chassis. Thus, the mole launcher is considerably shorter in its transportation state than in its operating state.

Abstract: In an open state of a valve, when a valve outside sleeve is rotated in the rear portion of a housing, a valve inner sleeve is moved forward to close a fluid channel, thus stopping supply of compressed driving air. Simultaneously, a front end of the valve outside sleeve is moved forward while it abuts against the rear surface of a retainer. Therefore, brake rods biased by compression coil springs are also moved forward, and front surfaces of the brake rods are abutted against a brake disk to effect braking, thereby immediately stopping rotation of a rotor. The urging force applied on the brake disk is the compression force of the compression coil springs.

Abstract: A hydraulic earth boring machine for forming conduit passageways beneath established surfaces such as roadways, walkways, or the like. The boring machine includes a hydraulic cylinder having an open axial passageway for receiving a boring shaft. A drive cylinder surrounds the boring shaft and is driven by the hydraulic cylinder. A gripping assembly is mounted upon a trailing end of the drive cylinder and selectively couples the drive cylinder to the boring shaft. An elevating and vertical aiming assembly is mounted upon the hydraulic cylinder for facilely providing positioning of the boring machine, in situ, within an earth trench. In addition, an axial bracing and horizontal angling assembly is mounted upon the cylinder for mounting the boring machine within the trench adjacent an established surface.

Abstract: This application discloses an improved quill feed unit of the type used in automatic or semi-automatic machines for holding and advancing the tool during the machining operation, wherein the rapid advance, feed, and rapid retract movements present in each machine cycle are performed entirely mechanically.Previously, substantially all of such guill feed units have been operated by the use of a hydraulic or pneumatic power, or a combination thereof, i.e., a hydraulic or pneumatic cylinder would advance and retract the tool, while a suitable motor would rotate the tool.Despite efforts to solve them, severe problems were and are still encountered with these units. Problems such as leakage, poor start up, tool breakage and ease of tampering are commonplace.

Abstract: Feed frame assembly for supporting and feeding drill head which rotates drill rod about axis. Assembly includes spaced front and rear end members, laterally spaced longitudinal members and first and second hydraulic feed cylinders. Longitudinal members and feed cylinders extend between end members and are parallel to rod axis. Piston rods of feed cylinders have double-acting pistons cooperating with cylinder bodies to feed head along the piston rods. Stabilizer cylinders in longitudinal members force bearing pads against rock face to counteract the drilling forces. Head mounting means secures rigidly one side of drill head to first cylinder body, and secures releasably with latch opposite side of head to second cylinder body. When latch is released drill head can swing outwards about first piston rod, and when engaged mutual actuation of feed cylinders moves drill head along rods. With head swung out, first cylinder is hydraulically locked to divert fluid to second cylinder.