Bizarre Patents
A method to tenderize meat with an explosive shockwave.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 7336044 | Direct current motor control circuit A DC motor control circuit includes a pair of substantially identical unipolar control circuits. Each of the unipolar control circuits are connected between a respective current source and a current input to the motor. Each of the unipolar control circuits includes ... | 02/26/2008 |
| 7322406 | Elevation sensor for a service hose and an apparatus for positioning and stabbing well tubulars An operational system and method and improved apparatus for positioning and stabbing well tubulars wherein: the grasping members of the apparatus can be folded and unfolded; the boom assembly can be pivoted to a downward clearance position; a plurality of stabbing a... | 01/29/2008 |
| 7293761 | Diagnostic system for cranes A hoist system for critical loads incorporates improved safety technology to monitor various possible fault conditions. For example, a command-not-operated function causes braking of the hoist when an encoder detects one of a group of conditions including a lack of ... | 11/13/2007 |
| 7264227 | Self-climbing stage light support A self-climbing stage lighting system having a self-climbing apparatus and a light bar is disclosed. The self-climbing apparatus is hung from cables that extend approximately vertically from a fixed endpoint. The self-climbing apparatus includes an elongated support... | 09/04/2007 |
| 7243870 | Portable studio hoist A portable studio hoist which can be positioned and secured in a studio pipe grid or other structural setting without the need for hard wired power supplies or fixed attachments. The portable studio hoist is designed to operate on standard single phase 120 volt powe... | 07/17/2007 |
| 7232113 | Draw works In the drawworks for lowering and withdrawing a load, in particular a drilling or a drilling plugging device, in particular for use on floating drilling platforms, which drawworks has at least one brake arrangement for braking and holding the load, an emergency brak... | 06/19/2007 |
| 7225865 | Apparatus for positioning a tong and drilling rig provided with such an apparatus A method and apparatus for positioning a tong comprises a piston and cylinder assembly and a mounting assembly therefor. The mounting assembly is mounted on a support beam in the drilling derrick and the piston and cylinder assembly is pivotally mounted on the mount... | 06/05/2007 |
| 7226274 | Cement slab leveling apparatus A concrete slab leveling apparatus is provided that is built upon a vehicle such as a flatbed truck or trailer which makes it highly transportable enabling the invention to move from site to site quickly and easily. The flatbed platform of the vehicle is equipped wi... | 06/05/2007 |
| 7185881 | Electric winch Apparatus and methods for operating a winch system comprising a wire spooled onto a drum rotatably mounted to a shaft. A permanent magnet is mounted to the drum such that, when an electric current is applied to a coiled winding mounted to the shaft, the drum rotates... | 03/06/2007 |
| 7156170 | Methods and apparatus for severing nested strings of tubulars An apparatus and method for use in severing casing as it is pulled from a wellbore. In one aspect, the apparatus, includes a clamping assembly, a drilling assembly and a cutting assembly. The apparatus is disposed at the end of a telescopic arm, with the components ... | 01/02/2007 |
| 7114577 | Safemode operating system for a drilling or service rig Disclosed herein is a system designed to manage or slow the block travel speed down to safe speeds when the rig is operating in a light load/high speed condition. The system monitors and controls engine torque and horsepower, providing the minimum amount of each nec... | 10/03/2006 |
| 7100708 | Autodriller bit protection system and method A controller provides an automatic bit protection sequence for an autodriller that can be initiated during the initial stage of set down of the bit within the formation. The automatic protection sequence establishes a setpoint for a parameter of interest (such as we... | 09/05/2006 |
| 7059427 | Automatic drilling system An automatic drilling system is disclosed which includes an electric servo motor operatively coupled to a winch brake control, a servo controller operatively coupled to the servo motor, and a drum position encoder rotationally coupled to a winch drum. The controller... | 06/13/2006 |
| 7026950 | Motor pulse controller The present invention provides a method and apparatus for generating one or more than one physically detectable physical influence changes to control or manipulate a down hole device. The present invention intercepts existing control signals to various controllers o... | 04/11/2006 |
| 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 |
| 6976804 | Method of repairing damaged concrete slabs A method of repairing concrete slabs that have become uneven and dangerous is provided that employs lime sludge that is injected under pressure into the space between the lower surface of the damaged concrete slab and the underlying ground to raise that slab back in... | 12/20/2005 |
| 6905432 | Chain drive arrangement A chain drive for pivot chains (7) or round link chains (8) having spur gears (2) and a polygonal chain wheel (10) reduces variations in velocity and acceleration transferred to the chains (7), (8). The driven gear wheel ( | 06/14/2005 |
| 6871840 | System and method for motion compensation utilizing an underwater sensor A system and method of use for determining a desired physical parameter relating to a load deployed by a movable vessel, in a predetermined plane, using a sensor disposed proximate the load underwater where the sensor produces a transmittable signal indicative of th... | 03/29/2005 |
| 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 |
| 6029951 | Control system for drawworks operations The system and method for use with a drawworks having a rotatable drum on which a line is wound, wherein the drawworks and the line are used for facilitating movement of a load suspended on the line, includes a drawworks control system for monitoring and ... | 02/29/2000 |
| 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 |
| 5615865 | Automatically engaging and disengaging pawl and pulley lifting mechanism A pulley is mounted in a surrounding hanging housing, open at the base end thereof and a cable is entrained over the pulley. The cable is provided with a pull means at one end the other end carries a load. Near each end of the cable are tripping brackets ... | 04/01/1997 |
| 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 |
| 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 |
| 5358219 | Crane claw tilt sensing and recovery A crane claw tilt switch in addition to a cable tension switch is used to prevent a crane claw from becoming entangled in its suspending cable. When the claw lands on the floor or some other object, it either comes to rest or starts to tilt. If it comes t... | 10/25/1994 |
| 5342020 | Speed controller for drilling rig traveling block A controller for a drilling rig traveling block is disclosed utilizing an absolute position locator and a processor for employing various operating fixed and variable parameters for controlling the speed of travel of the traveling block. As approach limit... | 08/30/1994 |
| 5271608 | Rope drawing winch A ship mounted winch is used to retrieve a continuous member for the retrieval of an anchor, a fishing net or the like. The continuous member is handled equally well whether it is a rope, a chain, a cable, or the like, even if the continuous member compri... | 12/21/1993 |
| 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 |
| 4962913 | Sidewalk lifter A device is disclosed for realignment of sidewalk sections displaced by settling or root lifting, where a hazardous step exists at a joint or crack. It comprises a rigid longitudinal span supported over the section, with cross members reaching over the se... | 10/16/1990 |
| 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 |
| 4895348 | Back tension device for winches The invention relates to a back tension device for a winch and comprises a freely rotatable pulley having associated therewith a pivotable tensioning element which is adapted to be urged into engagement with a cable from the winch so as to apply a back te... | 01/23/1990 |
| 4875530 | Automatic drilling system Maximum rate of drill bit penetration in high speed coring is achieved by precise control of bit weight and bit speed. The automatic drilling system of this invention makes it possible to quickly reach and maintain this optimum combination or "sweet-point... | 10/24/1989 |
| 4591131 | Draw works traveling block motion control apparatus The upward and/or downward travel of a traveling block in a derrick is controlled to prevent travel beyond normal, safe operating limits. A control line is positioned across the vertical movement axis of the traveling block and upon being moved by the tra... | 05/27/1986 |
| 4548250 | Apparatus for operating a line driven device An apparatus for operating a line driven device such as a traverse rod. The apparatus includes a frame member adapted to be mounted on or near the device, a reaction arm mounted on the frame member for pivotal movement, a motor mounted on the reaction arm... | 10/22/1985 |
| 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 |
| 4524952 | Safety system for an oil well derrick A safety system for an oil well type derrick that has a crown block and a traveling block and drawworks for raising and lowering the traveling block. It uses electrical sensing means to detect the presence of the traveling block, and it has electronic cir... | 06/25/1985 |
| 4523645 | Method of and apparatus for moving reeled material into and retrieving it from the upper end of a well bore in the earth's surface Material is supported on rotatable reel means with one end extending therefrom for connection with a well string for a well bore. Movable means support the portion of material extending between the reel means and well string. Means lower and raise the mov... | 06/18/1985 |
| 4449317 | Fishing apparatus This invention provides automatic fishing apparatus for trailing line fishing. The trailing line is supported on a reel which is adapted to be coupled or uncoupled with driving means to enable the line to be reeled in or let out. The selective coupling of... | 05/22/1984 |
| 4447043 | Automatic cable stop for towing winch An automatic cable stop for a tow truck winch having a bifurcated cable guide which rides on the cable and maintains contact even when the cable is positioned at an angle which does not correspond with that of the guide. A direct acting limit switch engag... | 05/08/1984 |
