Abstract: A tensioning assembly having a drive pulley, a tension pulley and a tension adjustment system is provided. The drive pulley has a first drive pulley channel and a second drive pulley channel. The tension pulley has a first tension pulley channel and a second tension pulley channel. The second tension pulley channel is aligned with the first drive pulley channel. The first drive pulley channel and the second drive pulley channel of the drive pulley and the first tension pulley channel and a second tension pulley channel of the tension pulley are configured and arranged to engage and route an endless looped member. The tension adjustment system is coupled to adjust the distance between the drive pulley and the tension pulley to adjust the tension in the endless looped member in relation to the drive pulley.

Abstract: A system and a method for orientation of a ring by rotation, including a cable engaging the ring which rotates about a ring axis, a motor assembly providing a first rotation reduction, and a stretcher for stretching the cable. The system has at least one proximal pulley and at least one distal pulley rotating about a pulley axis each pulley having grooves configured for receiving the cable therein. The ring is rotated by the motor assembly and the pulley assembly is configured to provide a second reduction of rotation to the ring relative to motor rotation, whereby the ring is driven via at least a double reduction of rotation relative to rotation of the motor, and the cable, the plurality of pulleys, and the ring provide a one-way mechanism.

Abstract: A system and a method for orientation of a ring by rotation, including a cable engaging the ring which rotates about a ring axis, a motor assembly providing a first rotation reduction, and a stretcher for stretching the cable. The system has at least one proximal pulley and at least one distal pulley rotating about a pulley axis each pulley having grooves configured for receiving the cable therein. The ring is rotated by the motor assembly and the pulley assembly is configured to provide a second reduction of rotation to the ring relative to motor rotation, whereby the ring is driven via at least a double reduction of rotation relative to rotation of the motor, and the cable, the plurality of pulleys, and the ring provide a one-way mechanism.

Abstract: The invention disclosed provides a drive head assembly for a fluid conveyor system that propels a fluid entraining conveyor through a well bore to carry fluids to the surface. The invention is comprised of a pair of synchronized follower wheels connected to a set of counter rotating sheaves. A fluid entraining conveyor is wrapped in a “figure-8” conveyor path around the sheaves in a plurality of coaxial grooves and around a distal sheave located in the fluid in the well bore. The coaxial grooves incorporate a unique shape which in conjunction with the wrap pattern provide improved tractive qualities and thus reduce tension in the conveyor and increase the durability of the conveyor. The conveyor can run at increased speeds and with no tension on the downward portion of the conveyor resulting in higher efficiency and less down time due to breakage.

Abstract: By providing a plurality of cylindrically shaped tube members nested together in coaxially aligned relationship, with each tube member being connected to a separate and independent control segment, with the control segments being constructed for raising and lowering the associated tube segment, an easily produced, reliable, dependable, and highly portable telescopically extendable and retractable multi-element system is realized. In the preferred embodiment, each control segment incorporates a separate endless loop drive belt which is cooperatively associated with a pair of pulleys mounted at opposed ends of the segment. Furthermore, each control segment is interconnected to the endless loop drive belt of an adjacent segment for causing all of the segments to move simultaneously in response to the initial movement of a first control segment.

Abstract: A power transmission mechanism comprising: a flexible power transmission element; a pair of a drive pulley and a driven pulley on which the flexible power transmission element is wound, each the pulley having a pin-embedding hole formed to extend from the outer circumferential thereof toward the center thereof, and a slit elongated in the circumferential direction of the pulley to extend to opposite sides of the embedding hole and communicating with the embedding hole; and a pair of columnar or tapered anchor pins each having a path hole penetrating the anchor pin across the lengthwise direction thereof to receive the flexible power transmission element inserted therein, wherein each the anchor pin receiving the flexible power transmission element in the path hole thereof is embedded in the embedding hole of the associated pulley under pressure, and the flexible power transmission element is thereby held on the pulley.

Abstract: The electrically operated dispensing appliance comprises a gear motor which is connected to the main shaft by a first gear and a first shifting sleeve in order to operate the advance and the relieving stroke under high loads, and for the operation at smaller loads, i.e. fast retraction and fast forward feed, it is connected to the main shaft by a second gear, a driving shaft, and a second shifting sleeve. An electromagnet is connected to said two shifting sleeves in such a manner that one or the other shifting sleeve is selectively connectable to the main shaft. A drive assembly of this kind is more economical and more silent than a solution with two gear motors.

Abstract: A rotary drive apparatus has a drum with a first plurality of generally parallel grooves spaced a predetermined distance apart. A capstan adjacent the drum has a second plurality of generally parallel grooves spaced the same predetermined distance. The capstan may be disposed adjacent the drum with its grooves disposed between the grooves on the drum. The drum and the capstan may have parallel axes of rotation. A continuous cable in the grooves of the drum and the capstan couples the drum and the capstan for joint rotation. A pulley and spring adjacent the capstan tension the continuous cable.

Abstract: A three degree-of-freedom robotic manipulator is constructed from three rotary drives. The rotary drive consists of a relatively small diameter cylindrical driving member coupled to a larger diameter cylindrical driven member. The driven member of a second rotary drive is mounted perpendicularly to the driven member of a first drive. The driven member of a third drive is mounted to the periphery of the driven member of the second drive with its axis of rotation parallel to the driven member of the second drive. The driving member of the third drive is located with its axis of rotation coincident with the axis of rotation of the driven member of the second drive. Motors powering the second and third driving members are mounted to the driven member of the first drive roughly centered over its axis of rotation. An extension arm for mounting the end effector is fixed to the driven member of the third drive. This arrangement reduces the number of required components and minimizes motor movement to reduce inertia.