Abstract:
A segmented pulley transmission is provided. A pulley assembly is rotationally mounted on an axle. The pulley assembly includes a core pulley having a first set of mating features on a peripheral surface thereof. A pulley segment set comprises a number of pulley segments slidably mounted in the pulley assembly and arranged in a ring concentric with the core pulley. The pulley segments are individually actuatable out of the pulley assembly into an engaging position and into the pulley assembly into a non-engaging position. The pulley segments have a second set of mating features on an peripheral surface matching the first set of mating features. An endless drive member has corresponding mating features on an inside surface for engaging the first and second sets of mating features of the core pulley and the pulley segments in an engaging position. Contact between the endless drive member and a core pulley defines a contact zone. An actuator actuates the pulley segments between the engaging and non-engaging positions when the pulley segments are outside of the contact zone. One of the key pulley segments in the pulley segment set is a key pulley segment that is positioned relative to the core pulley such that when the key pulley segment is actuated to the engaging position and rotated into the contact zone, the corresponding mating features of the endless drive member engage the first set of mating features of the core pulley and the second set of mating features of the key pulley segment without the introduction of significant slack or tension.
Abstract:
A key pulley segment in a synchronized, segmentally interchanging pulley transmission system is either first or last in a pulley segment set to engage an endless member. The first or last key segment teeth to engage or disengage, respectively, are shortened or completely trimmed, and the adjacent pulley segment to the key segment is elongated such that the inward portion of the tooth profile extends toward the key segment. Shortened tooth or teeth and an elongated adjacent segment together allow for many pulley segments to be designed as key segments. Completely trimmed teeth may be engineered to create a supporting surface for the endless member on the key segment. The elongated adjacent segment may have an extending portion which slidably mates with the supporting surface of the key segment, thereby receiving radial support therefrom. Multiple pulley segments from different pulley segment sets may be connected or constructed to move together in a unified stack, and may be staggered such that any one segment may be in an engaging position with the endless member when the unified stack is moved along the axis of rotation. Unified stacks may have guiding rails on both inner and outer radial surfaces, and the pulley assembly may have mating features that receive such guiding rails. Any number of the pulley segments in a unified stack may be key pulley segments. Pulley segments of a stack may be vertically separated into one or more unified stacks. Unified stacks may be moved by way of a cam or roller cam system, where each unified stack has a slidably or ratably attached roller and roller-arm. Chassis-mounted cams engage the rollers outside of the contact zone, rollers and roller-arms are moved into and out of engagement with the cams, and individual segments of a unified stack are moved into or out of engagement. Rollers may be actuated into and out of engagement by electromagnets, fixably mounted in an array. Rollers may discretely engage with multiple cams, by way of several electromagnet-arrays, and thereby complete several stack axial motions. Electromagnets in an array may be selectively energized to move selected rollers to an active position in order to effect key pulley segment engagement, stack axial movement and transition.
Abstract:
A computer system board protector (100) devices and related assemblies, configurations, and systems (400) The computer system board protector (100) includes a wall (102) that extends circumferentially about an axis to form an open circular cylinder, a plurality of retention protrusions (104) that extend inwardly from a first end (106) of the wall (102), with a central gap (108) disposed between the plurality of retention protrusions (104) sized for passage of a mount element fastener there through along the axis, and a base (110) that extends inwardly from a second end (112) of the wall (102), where the base (110) includes a central opening (114) sized for passage of a threaded back plate post there through along the axis to couple with the mount element fastener, where the central opening (114) of the base (110) is smaller than the central gap (108) between the plurality of retention protrusion (104).
Abstract:
A hand-mounted, video-guided system comprising: an element for mounting to at least one finger of a user; a video input carried by said element; an irrigation line carried by said element; a fenestrated suction head for mounting to the hand of a user, said fenestrated suction head comprising a hollow body having fenestrations formed therein, and a suction line having a fenestrated distal end disposed within the interior of said hollow body.
Abstract:
A hand-mounted, video-guided system comprising: an element for mounting to at least one finger of a user; a video input carried by said element; an irrigation line carried by said element; a fenestrated suction head for mounting to the hand of a user, said fenestrated suction head comprising a hollow body having fenestrations formed therein, and a suction line having a fenestrated distal end disposed within the interior of said hollow body.