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| Number | Title | Issue Date |
| 7207250 | Process and device for moving and positioning sheets of glass In a system for cutting glass sheets into shapes there is at least one cutting site (A, B). In order to align the glass sheet which is to be cut or the glass sheet shape into a defined position, on the edge of the tables I and II there are contact edges (21, 44, ... | 04/24/2007 |
| 7102623 | Control panel The invention relates to a control panel for construction equipment and/or cranes, preferably vehicle cranes, with a series of manually operable switches for triggering certain functions and control functions of the machine to be operated. In terms of the invention,... | 09/05/2006 |
| 6997442 | Safety sensor for a 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... | 02/14/2006 |
| 6947500 | Buffering and sequencing of soft decisions of multiple channels into a single shared biorthogonal decoder The invention is a receiver and a method of receiving data having a preferred application in a satellite receiver in accordance with the invention includes a memory (114) including an addressable storage array which stores a sequence of data samples contained... | 09/20/2005 |
| 6908074 | Device for changing the rigging of the pulley blocks of a crane The device enables a switch from the pulley blocks being rigged with one strand to the pulley blocks being rigged with two strands and vice versa. The jib tip has a pulley moveable along its axle between a central position, when the blocks are rigged with one strand... | 06/21/2005 |
| 6618999 | Crown bumper A safety apparatus for a lifting structure having a crown and at least one traveling block, and an oil derrick having a crown bumper, wherein the safety apparatus comprises at least two support beams attached to crown of the lifting structure; a plate sec... | 09/16/2003 |
| 6343703 | Anti-two block device using non-contract measuring and detecting devices In the anti-two block device, a non-contact measuring device detects in one form or another the distance between a boom nose and a load-bearing member supported thereby. If the distance detected is less than a predetermined threshold value, the device tri... | 02/05/2002 |
| 6068145 | Anti-two block system An anti-two block system for a crane having a body formed of a first plate and a second plate, a weighted member connected to the second plate of the body so as to contact a travelling member of the crane when the travelling member moves upwardly beyond a... | 05/30/2000 |
| 5992655 | Caterpillar sideboom replacement assembly A replacement assembly is provided for retrofitting old, discontinued, mechanically-operated, low-drive, Caterpillar sidebooms with a hydraulically-operated fail-safe sideboom system. Conversion of discontinued, mechanically-operated, low-drive, Caterpill... | 11/30/1999 |
| 5946748 | Multipurpose body-turn-over apparatus Disclosed is a multipurpose body-turn-over apparatus mainly including an elevator support, a cantilever elevator fixed to the elevator support, a driving mechanism mounted on the cantilever elevator, and a controller for setting operating time and speed, ... | 09/07/1999 |
| 5838246 | Safety apparatus for oil drilling derrick A safety apparatus for a derrick on an oil drilling rig includes a cable having a first end for connection to one side of the derrick at a predetermined location spaced below the crown. A series of pulleys is secured to the oil derrick to define a predete... | 11/17/1998 |
| 5730305 | Crane safety apparatus A crane safety apparatus for displaying a schematic diagram of a part of a crane mechanism on a two-dimensional screen dynamically as the crane mechanism is operated, and displaying on the same screen a predetermined operation zone as a visually discrimin... | 03/24/1998 |
| 5645181 | Method for detecting a crane hook lifting distance Rope extension is detected as a rope shift distance at predetermined time intervals. A rope extension amount is obtained as the accumulated value of the shift distances. The rope shift accumulated value is automatically reset to 0 when a hook structure re... | 07/08/1997 |
| 5632391 | Weight for a lift-limiting switch A weight for operating the lift-limiting switch of a crane, especially a telescoping-boom crane, is composed of two identical castings connected together by a hinge at one side and having a lock on the opposite side which, when actuated, holds the two mem... | 05/27/1997 |
| 5579931 | Liftcrane with synchronous rope operation An improved method and system for a liftcrane in which a load is lifted through the combined action of first and second hoist drums. The method and system use a first rope wound on one hoist drum and a second rope wound on the second hoist drum. The ends ... | 12/03/1996 |
| 5454474 | Dual weight assembly for a crane The disclosure involves a material handling machine, e.g., a crane, having a control circuit switch and a power limit switch. Disclosed is a new weight assembly having first and second weights. The control switch is maintained at a position by the first w... | 10/03/1995 |
| 5455567 | Crane anti tractor lift system An automatic signaling system from a tractor-trailer being accidentally lifted with the cargo by the overhead traveling crane includes a height-change sensor for triggering a pulse generator which drives a strobe light that is seen by a discriminator moun... | 10/03/1995 |
| 5405027 | Limit switch weight apparatus for crane hoist drives Disclosed is a crane hoist system having a hoist drum, a drum drive motor and control and power circuit limit switches. The improvement involves a first trip bar coupled to the power circuit limit switch and a second trip bar coupled to the control circui... | 04/11/1995 |
| 5362029 | Lift limit device for a load lifting mechanism A limit device for preventing travel of a hoist lift rope load above a predetermined height. The limit device includes an actuator mounted at a reference position adjacent the hoist lifting rope as it is raised and lowered by a prime mover. A switch is co... | 11/08/1994 |
| 5263660 | Anti-two block device An anti two-blocking device for preventing a lower load block (46) on a crane (10) from coming in contact with an upper load block (44) affixed adjacent a boom point (40). The device comprises a cable follower (60) through which the crane's cable (26) is ... | 11/23/1993 |
| 5226249 | Tightline apparatus for draglines A tightline apparatus for draglines which includes a pair of mechanical safety devices, each having an engaging bar pivotally attached to a swivel frame of the dragline above each drag rope at the point where the respective drag rope extends between each ... | 07/13/1993 |
| 5160056 | Safety device for crane A safety device for a crane which can make a safety operation precisely taking a relationship between a swinging condition of a boom and a limit working region into consideration. In the device, a working radius and a swinging angle of the boom and projec... | 11/03/1992 |
| 5139156 | Variable speed electric hoist A variable speed electric hoist includes an invertor unit for frequency-controlling the speed of rotation of a lifting motor, a brake on/off section for turning off a brake according to a command produced from the invertor unit while the invertor unit is ... | 08/18/1992 |
| 4905849 | Overhoist prevention system An overhoist prevention system suitable for use on a crane comprises (a) a proximity switch (17), (b) a movable detector plate (10) normally biassed away from the proximity switch, (c) an actuator (5) adapted for use with the hoist wire (4) for moving the... | 03/06/1990 |
| 4905848 | Coordinated hoist controllers A control arrangement for a multiple hoist suspension system in which a count is maintained for the pulley turns on each hoist. When the pulley counts approach within a selected deadband, the desired end location the controls are then left open loop and t... | 03/06/1990 |
| 4895101 | Device for lowering and lifting supports holding objects to be coated with chemical substances in plating baths A device for inserting a support holding an object into and removing said support with the object from a galvanizing bath comprises a transporting carriage and a lifting device for lifting and lowering said support. The support has outwardly extending arm... | 01/23/1990 |
| 4892202 | Deepwater extended hook travel attachment An apparatus for increasing the available hook raising and lowering distance is attached to a crane or other lifting structure having a boom and at least one lifting tackle utilizing at least one lifting line connected to a prime mover. The apparatus util... | 01/09/1990 |
| 4805650 | Apparatus for cleaning a tank-like vessel An apparatus for cleaning a tank-like vessel comprising (a) a supporting arm attached to a fixing plate, which can perpendicularly extend downward, (b) a folding arm of which base portion is rotatably attached to the lower end of the supporting arm, a position... | 02/21/1989 |
| 4804095 | Cutoff device for crane systems The cutoff device is provided for crane systems, especially a dredger to which a grab 1 is attached. Grab 1 has a cable 5 connected to it, which is guided over pulleys 4, 7 and kept under tension with the help of a weight 9. One of the two pulleys 4 is pr... | 02/14/1989 |
| 4653653 | Hoisting systems A safety system for overhead hoisting cranes is provided which incorporates a overload release coupling in the high speed drive shaft between the prime mover and the gear reducers driving one or more hoist drums with a dual reeving and a safety brake acti... | 03/31/1987 |
| 4636962 | Microprocessor-controlled hoist system Load position limits and incremental lowering of a load are controlled by a microprocessor forming an interface between an operator's control station and the hoist. Other hoist status conditions such as underspeed and overspeed of the hoist motor are dete... | 01/13/1987 |
| 4613849 | Interference warning device An interference warning device for an oil well drilling rig having a derrick, traveling equipment, a racker arm, and a block retractor. Fluid activated sensors provide electric signals when the traveling equipment is within a selected vertical distance fr... | 09/23/1986 |
| 4560074 | Scaffold mounted hoist There is disclosed a hoist adapted to be mounted on a conventional sectional scaffold structure in which the hoist apparatus consists of a boom assembly to be mounted near the top of a scaffold structure and a winch assembly to be mounted near the bottom ... | 12/24/1985 |
| 4535899 | Boom warning actuator A fluid pressure--activated warning system for a crane comprising a plurality of signal device actuators each further comprising a valve spool, shiftable in response to a dangerous condition, and adapted to permit the emission of an alarm on the occurrenc... | 08/20/1985 |
| 4523686 | Anti-two block system An improved anti-two block system having a boom hoist drum driven by a first hydraulic motor with a first variable displacement motor controlled by a first ram moveable in a given direction to supply fluid pressure for driving the boom drum to lower a boo... | 06/18/1985 |
| 4491301 | Tackles Interposed between the driving shaft of the tackle and the hoisting hook of the tackle is a flat textile strap or a flat metal braid. The strap or braid is attached to the drum of a drum-pulley keyed on the driving shaft at the end of the strap or braid. ... | 01/01/1985 |
| 4424909 | Crane boom warning actuator A fluid pressure-activated warning system for a crane comprising a plurality of signal device actuators each further comprising a valve spool, shiftable in response to a dangerous condition, and adapted to permit the emission of an alarm on the occurrance... | 01/10/1984 |
| 4372452 | Transfer hoist for disabled persons A lightweight hoist for use in living quarters or patient care facilities to transport disabled persons from one location to another. A flat, unitary, easily manufactured mounting plate provides a main frame that permits the hoist to be easily and inexpen... | 02/08/1983 |
| 4370713 | Anti-tightline control system and method for dragline type equipment An anti-tightline control system and method which monitors the hoist and drag rope-in length of dragline type equipment, and in the event that certain preset levels are exceeded, the control system functions to slow the hoist and drag rope drives, initiat... | 01/25/1983 |
| 4334217 | Electronic control indicator for cable hoist equipment A magnetic pick-up device or other electrical output type sensor is operatively situated adjacent to a rotary part of the cable hoist assembly and produces impulses as the part rotates. These are conveyed to electronic equipment which, by use of the neces... | 06/08/1982 |
