Class / Patent application number | Description | Number of patent applications / Date published |
254385000 | With rotatable, cable contacting, pulley wheel element attached to and reciprocated by driving component of device | 12 |
20110101294 | ENGAGEMENT CHAIN - The invention provides a pair of engagement chains which has inner tooth plates, bushes, outer tooth plates and connecting pins and is integrated by engaging hook portions of the inner tooth plates and hook portions of the outer tooth plates and is branched by disengaging the hook portions of the inner tooth plates and the hook portions of the outer tooth plates. The pair of engagement chains further includes inflection restricted plates having inflection restricted surfaces and inflection restricting plates having inflection restricting portions that are connected on the both ends of the connecting pins. | 05-05-2011 |
20120181494 | TELESCOPIC LIFTING DEVICE WITH SAFETY STRAP - A lifting device with a telescopic pole having at least three successive modules mounted so that the modules can slide vertically with respect to each other. A drive strap transfers movement in order to extend an upper module with respect to an intermediate module when the intermediate module is caused to move with respect to a lower module of the modules. The drive strap is kept taut between two fixation points placed respectively on the lower module and upper modules and pass along a return pulley device mounted on the intermediate module. A safety system is normally maintained in inactive position by tension of the drive strap is automatically released into active locking position to prevent the upper module from continuing to move with respect to the intermediate module if the drive strap breaks. | 07-19-2012 |
20130105751 | LOAD SENSING TRANSMISSION AND HOISTING DEVICE INCLUDING THE SAME | 05-02-2013 |
20130126809 | APPARATUS FOR RAISING AND LOWERING A BANNER WITH POWER CORD - An apparatus for raising and lowering an article has a housing and a cable secured to the housing. A motor winds and unwinds the cable on a tube arranged within the housing. A retractable power cord assembly is coupled to the housing. The retractable power cord assembly has a power cord that is wound and unwound from the retractable power cord assembly as the cable is wound and uwound on the tube. | 05-23-2013 |
20140284531 | Orbital Winch - Orbital winch having: lower and upper frames; spool having upper and lower flanges with lower flange attached to lower frame; axial tether guide mounted to upper frame; secondary slewing ring coaxial with spool and rotatably mounted to upper frame, wherein secondary slewing ring's outer surface has gearing; upper tether guide mounted to inner surface of secondary slewing ring; linear translation means having upper end mounted to upper frame and lower end mounted on lower frame; primary slewing ring rotatably mounted within linear translation means allowing translation axially between flanges, wherein primary slewing ring's outer surface has gearing; lower tether guide mounted on primary slewing ring's inner surface; pinion rod having upper end mounted to upper frame and lower end mounted to lower frame, wherein pinion rod's teeth engage primary and secondary slewing rings' outer surface teeth; and tether passing through axial, upper, and lower tether guides and winding around spool. | 09-25-2014 |
20150034894 | DESCENT ASSIST DEVICE FOR POWERED ASCENDERS - A descent assist device for powered ascenders is discussed herein, In one embodiment, the descent assist device can include a base plate having a first guide surface, a capstan peg, a second guide surface, and a retention loop extending from the first guide surface to the second guide surface configured to retain a rope on the descent assist device. Where the angle of wrapping of the rope around the first guide surface and the capstan peg is constant during use and the angle of wrapping of the rope around the second guide surface is adjustable by the user of the device to increase or decrease the frictional drag of the rope. | 02-05-2015 |
20150323122 | Platform Lift - A platform lift employs flexible polyurethane timing belts as flexible rack members in a rack and pinion type drive mechanism. The platform lift includes a horizontal platform or deck shiftably mounted to a frame upright, post or column that is raised and lowered by movement of a “drive” carriage shiftably disposed within the frame upright. The carriage is driven along the flexible polyurethane timing belt disposed within the frame upright by a reversible electric motor that turns the pinion gear inside the carriage. The timing belt passes through a carriage and is trained around the pinion and between two idle rollers in a serpentine fashion. | 11-12-2015 |
20160068378 | CHAIN HOIST - A chain hoist includes a body; a hoist chain passing through the body; through-holes in the body for the hoist chain; and an actuator arrangement for operating the chain hoist, the actuator being used for moving the hoist chain through said through-holes in a lifting or lowering direction of the chain hoist, and on the side of at least one through-hole the portion of the hoist chain moving outside the body is provided with a limiter member whose position in the longitudinal direction of the hoist chain is adjustable, the limiter member being provided with a detectable sensor; and a sensor detection member is provided in the vicinity of said through-hole to detect the detectable sensor at a predetermined distance. | 03-10-2016 |
20160167922 | SERVICE LIFT | 06-16-2016 |
20190145185 | HOISTING SYSTEM | 05-16-2019 |
254386000 | Element reciprocated by expansible fluid motor | 2 |
20140246635 | CYLINDER-DRIVEN LIFTING MECHANISM OF COMPACTION MACHINE AND COMPACTION MACHINE - In one aspect of the disclosure, a cylinder-driven lifting mechanism of a compaction machine includes a cylinder having a first end and a second end, a fixed pulley set, a movable pulley set, a rope having a head end, and a tail end configured to connect a compaction hammer. The first end of the cylinder is connected to a vehicle body of the compaction machine and the second end of the cylinder is connected to the movable pulley set. The rope is wound on the fixed pulley set and the movable pulley set and is then connected to the compaction hammer. When the cylinder performs extension and refraction movement, the movable pulley set moves with the cylinder, the distance between the movable pulley set and the fixed pulley set increases or decreases, and the compaction hammer connected to the tail end of the rope is lifted up or dropped respectively. | 09-04-2014 |
20150314999 | DOUBLE MOVABLE PULLEY LOAD BALANCING HOIST - A load-balancing device can be used to assist the lifting and lowering of heavy objects. In some examples, a load-balancing device includes a housing, a first movable pulley, a second movable pulley, a stationary pulley positioned between the first movable pulley and the second movable pulley, and a cable wound at least partially around the first movable pulley, the second movable pulley, and the stationary pulley. In operation, a pressurized control fluid may be introduced into a pressure chamber defined between the housing, the first movable pulley, and the second movable pulley. This can cause the first movable pulley and the second movable pulley to move away from the stationary pulley, withdrawing the cable into the housing and lifting a load attached to the cable. | 11-05-2015 |