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| Number | Title | Issue Date |
| 8136795 | Centrifugally actuated governor An assembly (20) for controlling movement of an elevator car (12), which includes a sheave (18), a first mass (32a, 48a), a second mass (32b, 48b), and a coupler (54) that provides a... | 03/20/2012 |
| 7810792 | Modular lift assembly having telescoping member A modular lift assembly configured for attachment between two substantially parallel support beams includes a chassis, at least one lift component attached to the chassis, a telescoping or other adjustable stiffener, and at least one attachment assembly. The chassis... | 10/12/2010 |
| 7766308 | Theater rigging system A theater rigging assembly having a beam, which is attached to structural support members of a theater or other performing arts venue. The assembly further includes a winch assembly and head block that can be positioned at any point along the beam and selectively fi... | 08/03/2010 |
| 7618024 | Apparatus and method to facilitate loading and unloading of passenger vehicle cargo The invention comprises an anchor, rope and pulley system to load and unload cargo into and out of passenger vehicles. The anchor system comprises two load bearing straps and a means to attach the straps together. The straps are looped around the vehicle's side hand... | 11/17/2009 |
| 7562863 | Theater rigging system A theater rigging assembly having a beam, which is attached to structural support members of a theater or other performing arts venue. The assembly further includes a winch assembly and head block that can be positioned at any point along the beam and selectively fi... | 07/21/2009 |
| 7467784 | Equipment cover lifting device A device for lifting and lowering a cover from a lower surface of a roof includes four lines connected to the ends of a top panel of the cover. The lines pass through eyes on the cover at the midsection of the top panel, then through pulleys on the lower surface of ... | 12/23/2008 |
| 7419138 | Self-camming pulley A pulley is provided having a first plate and a second plate arranged adjacent to the first plate and connected to the first plate by an axle. An eccentrically mounted sheave is located between the first plate and the second plate and is adapted to freewheel in one ... | 09/02/2008 |
| 7398958 | Multiple sheave assembly system with compression and support sheaves of an aerial ropeway transport installation rope A range of mixed support and compression sheave assemblies is formed from standard 2S2C modules each comprising: two compression sheaves (11) and two support sheaves (12) respectively mounted rotating freely on the en... | 07/15/2008 |
| 7389974 | Screw, nut and cable transmission A screw, nut and cable transmission device (6, 7, 12, 13, 20 and 21) between a motor (5) and a device (1, 2) which is to be moved and which is made up of at least one double pulley (14), which amplifies the movement of the cable li... | 06/24/2008 |
| 7380771 | Protective lifting system for outdoor use A protective lifting system includes first and second mounting hooks each having, respectively, a line and pulley connection eyelet ring mounted thereon and a mounting bar connection eyelet ring mounted thereon which extends generally perpendicular to the shank sect... | 06/03/2008 |
| 7293762 | Modular lift assembly A lift assembly having a drum rotatably mounted to a frame and linearly translatable with respect to the frame. A plurality of head blocks are connected to the frame along a helical mounting path, wherein linear translation of the drum during takeoff or take-up main... | 11/13/2007 |
| 7281627 | Forged chain link assembly The forged chain link assembly comprises a forged chain link having a male end and a female end which cooperates with an opposite end of an adjacent link to form a chain, each end having a bore therein which cooperates with a bore in the opposite end of an adjacent ... | 10/16/2007 |
| 7275733 | Compact drive for a counterweight assisted winch The invention is a compact drive for a counterweight-assisted winch which can be retrofitted into existing manually operated systems that use counterbalancing weights. The counterbalancing weight will be fixed at a first predetermined percentage of the maximum capac... | 10/02/2007 |
| 7258325 | Modular lift assembly A lift assembly having a drum rotatably mounted to a frame and linearly translatable with respect to the frame. A plurality of head blocks are connected to the frame along a helical mounting path, wherein linear translation of the drum during takeoff or take-up main... | 08/21/2007 |
| 7234686 | Fail-safe cleat with automatic in-line locking cam and quick-release slot A failsafe device for raising/lowering articles includes a frame and a fastener for attaching the frame to a ceiling or wall to elevated an article above the floor. A pulley or sheave is mounted on the frame about a substantially horizontal axis when the frame is mo... | 06/26/2007 |
| 7125001 | Method and device for pulling a cable through a section of pipe An improved cable pulling device and method is shown. The cable pulling device is smaller, less expensive, and easy to use for lateral line replacement. The cable pulling device includes a cable contacting portion that provides supplemental frictional force during a... | 10/24/2006 |
| 7118094 | Rotatable cable guide with cable switching feature A cage in which two pulley wheels are mounted with tangent circumferences so that their circumferential cable grooves surround a cable passing between the wheels. The cage freely rotates about an axis that passes between the wheels. The cage axis is normal to the pl... | 10/10/2006 |
| 7093823 | Lifting unit A lifting unit, comprising a frame for supporting a motorized winch, at least one first tackle and one second tackle, the first tackle being interposed between the second tackle and the winch, each tackle being provided with two blocks, a fixed one and a movable one... | 08/22/2006 |
| 7086433 | Tree felling assembly An assembly for felling a segment of a tree trunk in a safe and controlled manner and method of using the same. The assembly comprises a vertical support structure having an elongated base portion, an elongated mast portion connected to the base portion or integrall... | 08/08/2006 |
| 7073780 | Fail-safe cleat with automatic in-line locking cam A failsafe cleat with automatic in-line locking cam includes a frame having proximate and a remote sides on substantially opposite sides of the frame and formed with a passageway, extending between said proximate and remote sides, for receiving a line that can move ... | 07/11/2006 |
| 7070171 | Hoisting and stabilization system for suspended load support The suspension and hoisting system for a load support comprises two cable circuits, each comprising a cable (C1, C2) fixed at one of the ends thereof to a fixed point (Pf1, Pf2) and at the other end to a lifting apparatus (T1, T... | 07/04/2006 |
| 7007927 | Arborist limb lowering method An apparatus for the controlled lowering to the ground of a cut portion of a tree includes a rope and an anchor having an arrangement of guiding protuberances., each guiding protuberance including a bearing surface frictionally engaging and redirecting the rope with... | 03/07/2006 |
| 6988716 | Modular lift assembly A lift assembly having a drum rotatably mounted to a frame and linearly translatable with respect to the frame. A plurality of head blocks are connected to the frame along a helical mounting path, wherein linear translation of the drum during takeoff or take-up main... | 01/24/2006 |
| 6926259 | Hoist system The invention is a hoist system for use on a drilling rig made of a tubular mast with a front, back, and top side, a splittable block connected to the mast top side, a trolley with a trolley top and bottom side, wherein the trolley's top side is connected to the spl... | 08/09/2005 |
| 6691986 | Modular lift assembly A lift assembly having a drum rotatably mounted to a frame and linearly translatable with respect to the frame. A plurality of head blocks are connected to the frame along a helical mounting path, wherein linear translation of the drum during takeoff or t... | 02/17/2004 |
| 6634622 | Modular lift assembly A lift assembly having a drum rotatably mounted to a frame and linearly translatable with respect to the frame. A plurality of head blocks are connected to the frame along a helical mounting path, wherein linear translation of the drum during takeoff or t... | 10/21/2003 |
| 6631885 | Arborist limb lowering device and method An apparatus for the controlled lowering to the ground of a cut portion of a tree includes a rope and an anchor having an arrangement of guiding protuberances, each guiding protuberance including a bearing surface frictionally engaging and redirecting the... | 10/14/2003 |
| 6601829 | Pulley system with gripping block and tackle for load handling An improved block and tackle system comprising a stationary-block housing (10) having attached pulleys (14 & 18) and cam cleat (22), and a moving-block housing (12) with attached pulley (16) and cam cleat (20) Said invention allows a load (8) to be raised... | 08/05/2003 |
| 6471189 | Robot with externally positioned protective hose A robot with at least one at least partly externally positioned protective hose, particularly a cable guidance hose receiving robot tool supply cables has a winding guide located in the vicinity of a tool assembly flange for winding and unwinding the prot... | 10/29/2002 |
| 6361022 | Lifting device A lifting device for lifting elongate objects such as watercraft from trailers or the like to overhead storage positions has a plurality of individual lines passing over a plurality of pulleys generally configured in a rectangular shape and supported from... | 03/26/2002 |
| 6286245 | Tag line return A tag line return that repositions a tag line to the base of an outrigger after release of a fishing line from the tag line. The return has a housing with internal guides which are adapted to urge the return upwardly when a fishing line is attached to the... | 09/11/2001 |
| 6056273 | Internal sheave pulley system for bipods, tripods, or quadripods A bi-, tri-, or quadripod apparatus utilized over a confined space to aid in the introduction or removal of persons or equipment into the space, including a head casting with upright members extending vertically downwards and outwardly from the head casti... | 05/02/2000 |
| 6056274 | Boat hoist apparatus An apparatus for selectively raising, storing, and lowering a recreational water craft that includes a first cable. The first cable is attached at one end to a winch for selectively shortening or lengthening the first cable. The first cable is attached at... | 05/02/2000 |
| 5927693 | Rope guiding device with pivotal guide roller for rope winches A rope guiding device (1) for rope winches (W) comprises a stand with points of attachment for the attachment of a rope winch, which stand accommodates a rope guide (3) constituting the rope outlet and inlet and a guide roller (4) pivotally supported on t... | 07/27/1999 |
| 5909870 | Logging tractor accessory A new logging tractor accessory for supporting a cable from grapple-style skidding implement. The inventive device includes a housing secured to an arch of a logging tractor equipped with grapple-style skidding elements. The housing includes a pair of upw... | 06/08/1999 |
| 5906325 | Self-synchronizing pulley/winch apparatus and operating method for cable having electronic or other protruding elements spaced along its length A winch 100 is provided for taking up or paying out cable 13 without damaging protrusions 14 spaced along the cable from potentially high compressive forces applied to the cable when it is wound over drum members 16, 18, 20 of each of a pair of drum mecha... | 05/25/1999 |
| 5855529 | Apparatus for guiding a control cable An apparatus for guiding a cable includes a frame and a cable guide member mounted to the frame for rotation around a guide member axis. The cable guide member includes a curved outer peripheral cable guide surface disposed radially outwardly from the gui... | 01/05/1999 |
| 5449154 | Bearing assembly for rotary support of a line The outer race of a roller bearing sheave is omitted so that the bearings are in direct engagement with a line. A retainer for the ends of the bearings is provided to allow the bearings to rotate and recirculate around an inner race. The rollers deflect p... | 09/12/1995 |
| 5149059 | Low profile multiple bearing block fairlead A low profile fairlead has a plurality of blocks support in a spaced relation along the arc of a circle to simulate a single bearing block of larger diameter.... | 09/22/1992 |
| 5016300 | Patient standing assistance apparatus An invalid assistance device in which a supported, locked, and guided cable or other flexible line is used to stabilize an invalid in the range of desired vertical positions from sitting to standing while a single attendant can work with the invalid, thus... | 05/21/1991 |
