Abstract: A modular lift system may include, but is not limited to: one or more lift segments each including: a lift-truss structure; and a drive shaft having at least one end-coupler, at least one lift assembly coupled to the lift-truss structure, and at least one drive segment including: a drive-truss structure; a drive motor coupled to the drive-truss structure; and a drive-coupler attached to the drive motor and configured to engage the end-coupler of the drive shaft.

Abstract: A pulley includes a securing head and a first flange. A first shaft extends from the first flange. A sheave is mounted rotatable around the first shaft in one direction of rotation only. A cam is mounted able to move away from or towards the sheave. A spring is fitted to exert a force moving the cam towards the sheave. A handle is mounted on the first flange to move the cam between the first and second positions.

Abstract: A frictional exercise device includes a shell body to be attached to a stationary object, for instance a door, a doorjamb or a floor, either directly or via a resistance band. A core cylinder in the shell body has an arcuate friction surface. A non-elastic strap winds partially around the core cylinder and hugs the friction surface. When said strap is pulled at one end, a frictional force between the friction surface and the strap opposes a movement of the strap across said friction surface. The magnitude of the frictional force is proportional to a resistive force applied at the opposite end. The arcuate friction surface is formed with a depression and adjoining elevations. A counterbrake projects towards the depression in the friction surface and deflects the strap towards the depression to define an undulating course of the strap along the friction surface and the counterbrake.

Abstract: An apparatus includes a drum to draw in or let out a line, and a motor and transmission coupled to the drum to apply a torque thereto. In certain embodiments, the motor and transmission are substantially entirely contained within the drum. In the same or other embodiments, a bearing may provide support for both the transmission and the drum.

Abstract: A first sidewall includes a pair of threaded bosses nesting within corresponding cavities in a second sidewall. Bolts extend through the cavities into threaded engagement with the bosses to secure the sidewalls with one another. One of the bosses supports a knurled or toothed wheel for engagement with a parachute cord. A pivotable pawl having a knurled or toothed surface is pivotably supported on a shaft anchored in the sidewalls and spring biased toward the wheel into engagement with the parachute cord to prevent translation of the parachute cord in one direction. The other boss supports a hook or cord for anchoring the tie down to an anchor.

Abstract: A pulley training system including a pulley wheel and a pulley housing, configured to receive a cord over the pulley wheel, and including one or more support attachment points. A radial pulley lock for use with a training pulley system. A sliding knot enclosure for use with a training pulley system. A training pulley system adapted for use with one or more of a variety of types of pulley cords, and with rope adjuster mechanisms to operate with such types of pulley cords.

Abstract: A pulley with an unlockable clamp, comprising a rotary roller, a pivoting trigger designed to release and clamp the rope against the roller, and control means to keep the trigger in the inactive position disabling action of the clamp, wherein the control means comprise a lock fixed onto the first flange-plate and able to be actuated from a locked position to an unlocked position to enable movement of the trigger to the inactive position.

Abstract: A retractable lifeline assembly includes a housing having a first portion and a second portion separated by a plate portion having an aperture. The aperture places a first cavity of the first portion in fluid communication with a second cavity of the second portion. A shaft extends through the aperture into the first cavity and the second cavity, and a seal proximate the shaft and the plate portion seals the first cavity from the second cavity. The first portion contains a cable assembly and the second portion contains a brake assembly.

Abstract: A brake device for a strap-reel frame is installed on the frame body of the strap-reel frame for braking the inner and the outer disc pivotally fitted on the horizontal shaft of the frame body. The brake device includes a swinging rod having one end pivotally connected with a preset portion of the frame body above the horizontal shaft and able to be actuated to swing downward by its own gravity. The swinging rod has its intermediate portion fixed with two brake blocks able to be moved downward together with the swinging rod to push against the outer circumferential edge of the inner disc and stop the inner disc from rotating.

Abstract: A damper includes a frame, a main gear mounted to the frame for rotation about an axis of rotation, and a spring operably connecting the main gear and the frame such that rotation of the main gear tensions the spring. The main gear has a circumferential recess formed therein that defines a circumferential channel or reel. An elongated flexible member is wrapped around the main gear, disposed within the circumferential channel. A gear damper is mounted to the frame and is operably engaged with the main gear to dampen rotational movement of the main gear. The damper can be configured for one-way and two-way damping.

Abstract: An adjustable brake is provided that applies a braking force directly to an elevator sheave over which a cable suspends an elevator car and a counterweight. The brake includes a pair of calipers that apply a braking force to either longitudinal end of the sheave. The brake is spring set and may be released using, for example, electromagnetic, hydraulic or pneumatic forces. The calipers are mounted to and movable along a rail to enable adjustment of the location of the calipers. Further, the calipers are coupled together using one or more pins and are movable along the pins to enable adjustment of spacing between the calipers. The brake is particularly adapted for use with existing elevators because the brake does not require modification to the existing elevator sheave.

Abstract: A double-wrap band brake apparatus which has a double-wrap brake band comprising an annular intermediate band with a frictional surface formed on the inner periphery thereof, a pair of annular outer bands secured to the free end of the intermediate band in a state that the respective free ends of the outer bands oppose to each other and have frictional surfaces respectively formed on the inner peripheries thereof, an anchor bracket secured to the operating ends of the outer bands to be latched on the side of a main body casing, and an apply bracket secured to the operating end of the intermediate band for receiving a force in a direction in which the intermediate band and the outer bands are constricted from an actuator. The brake apparatus is used to brake a rotating member fitted in the double-wrap brake band. A center deviation correcting member for correcting a center deviation between the intermediate band and the outer bands is formed on at least one of the anchor bracket and the apply bracket.

Abstract: A piston-cylinder unit for pressure fluids includes a housing bounded by a head piece at each end thereof; a cylinder disposed within the housing; a piston reciprocatingly movable within the cylinder; a pulley having a circumferential outer surface is mounted for rotation about an axis within each of the head pieces; a pull belt is secured to the piston and looped around the outer surface of the pulleys; a power pick-up is attached to the pull belt; a braking device for the pull belt is disposed within the head piece and juxtaposed with at least one of the pulleys and has a shape which is complementary to at least a portion of the circumferential surface of the pulley; and a feed conduit connected to the head piece for feeding the pressure fluid to the braking device.

Abstract: A brake assembly for a rotatable wheel in which the rim of the wheel has an integrally formed lip extending from the side thereof and forming a trough. A Kevlar.TM. aramid fiber jacketed cable, positioned in the trough, encircles the lip in the direction of rotation of the wheel. The cable is affixed to the frame at one end and to an operating lever at the other end. Moving the lever tensions the cable and applies a frictional load to the trough to brake the wheel. In a second embodiment, a pair of opposed lips, one on either side of the rim, increases the braking effect.

Abstract: A braked twin-wheel caster assembly consists of five components--a body, two indentical wheels, a metal wheel spindle and a locking lever. A molded brake lever, rockable between a wheel-locking position and an unlocking position in which the wheels are free to turn, has an intermediate mounting portion which pivots in a bearing recess in the moulded body. The bearing recess is disposed towards the trailing end of the body, and it is open at an outer aperture and also at an inner aperture. An outer end portion of the locking lever projects through the outer aperture to provide an operating member for external operation. An inner end portion of the locking lever projects from said inner aperture to provide a locking member for engagement with the caster wheels. The intermediate portion of the locking lever is molded so that it can be resiliently compressed sufficiently for it to be inserted into the bearing recess through the outer aperture.

Abstract: A remote controlled slack pulling log skidding carriage is provided for feeding a slack drag line toward a log to be skidded. A drive sheave rotatably mounted in the carriage is operated by a hydraulic motor. The fluid to operate the motor is stored in one or more accumulators, and a radio controlled valve starts and stops the flow of fluid to the motor. A mechanically operated hydraulic pump also is provided to recharge the accumulators during a skidding operation. A reciprocating locking assembly is provided to alternately lock the carriage to the skyline or to the slack line.

Abstract: The invention relates to a band pressing shoe. Such shoe includes a rigid body to which is attached a thin flexible and inextensible strip. When the rigid body is subjected to a pressing thrust, the strip assumes an arcuate shape and tautens. Between the strip and the band are interposed one or more fluid cushions supplied from a manifold through an elastic mattress made of a cellular material. The pressing shoe can be supplied in all cases where it is required to drive or restrain a band running over a cylinder (e.g. a roller, drum, pulley or the like), examples being conveyor belts, transmission belts, metal strips undergoing splitting, planing or coiling, and so forth.