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7434785 |
Shot tool entry system
A forcible entry tool for gaining access to a secured structure includes a a hollow elongated housing defining an interior chamber therein. The hollow elongated housing has an operative end adapted...
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6168062 |
Self-actuating slack puller
A slack puller has symmetrical sheave assemblies on each side of a cable path. The sheave assemblies each include a driven sheave mounted on an arm. When the sheaves are engaged with the cable by...
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6164627 |
Device for hydraulically actuating winches in a pipe-laying machine
The actuating device, in particular for a pipe-laying machine, according to the present invention comprises a first winch (4) and a second winch (5) for respectively operating a movable gripping...
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5984277 |
Method of operating a winch, and associated device
The present invention relates to a method of operating a winch, in which a rope which is wound onto a driven reel is supplied to at least one capstan head and wound around said capstan head, with a...
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5836343 |
Pumps and pump handling apparatus
An electric pump 13 is mounted on a support 24 and can be raised and lowered using chains 25 driven by a motor. Supply cable 14 for the pump is stored on drum 15. Fluid is discharged by the pump...
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5176364 |
Direct drive hydraulic wireline winch assembly
A hydraulically powered, direct drive, quick response, bidirectional rotation, and variable speed and torque wireline multiple reel assembly for winding or unwinding cable under the control of an...
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4921219 |
Powered sailboat winch
A power sailboat winch mechanism for the high speed gathering of running rigging line under initial low tension with final slow speed gathering of the same line under final high tension combined...
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4557390 |
Suspended counterweight control system
An apparatus is disclosed for counterbalancing a load carried by a crane by a counterweight suspended from the mast of the crane. A counterweight height control system is provided for maintaining...
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4555092 |
System for operation of a direct drive dual drum winch
For use in service and maintenance of oil and gas (or water) wells, a system for operating a truck mounted direct drive dual drum winch. Each drum is independently driven by a direct coupled radial...
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4482133 |
Pneumatic winch
A pneumatic winch apparatus applies a constant and non-jerking pull to a cable. The amount of pull or load applied to the cable is determined by the air pressure supplied to an air motor and the...
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4432532 |
Direct drive dual drum winch
For use in service and maintenance of oil and gas (or water) wells, a truck mounted line and cable winch. A winch has dual drums each of which is independently driven by a direct coupled radial...
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4398698 |
Freefall winch system and method of operation
One or more freefall systems for a crane or the like is disclosed, which system includes a protective circuit that includes three separate switches that must be closed before the winch can be...
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4373332 |
Movement compensation arrangement
This movement compensation arrangement in one aspect comprises a hydraulic main motor group driven by the pressure difference between two hydropneumatic pressure containers and a hydraulic...
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4359307 |
Vehicle for transporting compressible materials
A trailer van is adapted to load compressible materials in sequential steps resulting in a compressed product load. The product is compressed by a bulkhead which in turn is moved by a pair of...
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4349180 |
Device for handling from a boat a submerged load hooked onto the end of a cable
This invention relates to a device for handling a submerged load from a s. The submerged load is held by a cable which is attached to a cable recovery drum mounted in an anti-rolling cradle located...
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4345742 |
Regenerative hydraulic interlock system
A hydraulic yarding system in which the haulback and main drum are coupled to a primary drive motor and provided with a hydraulic interlock motor coupled to a planetary set in the haulback drive in...
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4323222 |
Control systems for hydraulically operated elements circuits or systems
Method of controlling two separately operable hydraulic circuits involving monitoring the pressure conditions in one of the circuits, comparing this pressure with a reference pressure which is...
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4305571 |
Means for regulating two trawl winches
Control means for two trawl winches having separate motors and supply systems, each motor having a shunt line which is connected to the shunt line of the other motor by a pressure operated value...
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4234167 |
Automatic inhaul winch system
An improved winch system to automatically inhaul or retrieve flexible line during a slack line condition. The winch system utilizes a traction unit to control the pay out and retrieve the flexible...
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4204664 |
Winch mechanism for crane
A winch mechanism includes a first and a second drum each having multiple grooves therein. A frame supports the first drum spaced from the second drum with the axis of rotation of the first drum...
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4183649 |
Oil derrick string-up apparatus and methods
An apparatus is provided for removing and replacing heavy steel drilling cable within the derrick structure of an oil drilling rig. The apparatus includes a first powdered winch for carrying a...
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4088304 |
Winch system control mechanism for the simultaneous control of two winch motors
A winch system control mechanism for the simultaneous control of two winch motors includes a servo valve which is connected to an adjustable cylinder double drive pump for regulating the fluid...
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4058295 |
Small, variable-speed yarder
A small, variable-speed yarder is provided with main, haulback and slack-pulling drums, each containing a planetary drive transmission with provisions for dual power inputs. A variable interlock...
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4005779 |
Tightline logging system
A carriage carrying a match block moves away from a slider by gravity along a tightline from a mast of the slider, and is pulled back to the slider with a turn of logs by a mobile mainline unit of...
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3965841 |
Method for hauling a vessel alongside a mooring platform
This relates to a method for positioning and hauling a vessel alongside a mooring structure wherein the vessel is connected to the mooring structure by two cables and the vessel is hauled by...
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3966170 |
Traction winch
A power driven traction winch for drawing up rope having two spaced, parallel, power-driven drums journaled on a bearing support structure; a pulley mounted coaxially on one of the drums and free...
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3960360 |
Internally pressurized load supporting mast
A workover rig for lifting or lowering oil well pipe into a well casing is disclosed. The rig has a mast structure adapted to communicate hydraulic fluid to a drive cylinder which actuates a pulley...
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3828683 |
MARINE LOAD TRANSFER SYSTEM
This system for transfer of a load at sea includes a three-drum winch that controls three lines, a set of sheaves mounted on a kingpost or mast on the supply ship, a block to be mounted to a padeye...
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3799505 |
CRANE AIDING MECHANISM
A crane aiding mechanism is for use with a crane having a two-part line. A hoist part of the line is engaged with a regular hoist and an aid part of the line is engaged with an aid winch. Coupled...
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3792836 |
SIMPLIFIED WELL RIG
A multipurpose oil well rig of simple construction with hydraulically actuable working components. The rig lift system has three hydraulically driven piston rods or rams, one or more of which may...
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3765614 |
LINE HAULING AND COILING APPARATUS
A crab trap warp line can be both hauled and coiled by the disclosed apparatus including coiling mechanism operated conjunctively with hauling mechanism through a common hydraulic drive system...
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3750970 |
LINE COILING APPARATUS
A crab trap warp line coiling mechanism is disclosed that can be operated conjunctively with line hauling mechanism. A chamfered presser wheel that wedges line into the V-shaped groove of the...
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3685668 |
CONVERTIBLE LEVEL LUFFING CRANE
A crane having a multiple drum hoist structure to which is pivotally attached an inner boom which in turn pivotally supports an outer or jib boom. A pair of the drums are connected to the booms...
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3643922 |
DEVICE FOR THE CONTROL OF THE SHIFT MOVEMENTS OF A FLOATING BODY
A suction dredger comprising a floating body carrying a suction pipe having a rotatably driven cutter at the lower end thereof and hydraulically operated winches to haul and veer the suction pipe,...
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3510107 |
MULTIPLE HOIST SYNCHRONIZATION SYSTEM
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3494443 |
TOWBOAT SYSTEM FOR HANDLING ACOUSTIC SOURCE IN MARINE SEISMIC OPERATIONS
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3477697 |
WINCHES
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3466013 |
WINCH CABLE ANTI-SLACK UNIT
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3462125 |
APPARATUS FOR HANDLING WELL TOOL CABLES
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3448962 |
CABLE TENSIONING DEVICE FOR WINCHES
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3399868 |
Rope pay-out apparatus
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3300187 |
Semi-automatic warping and mooring arrangement
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3037720 |
Cable tension booster
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2954209 |
Winch
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2821794 |
Cable operating means for earth mover
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3606256 |
Title is not available
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