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Document Title |
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5597079 |
Directional indicating device for detecting improper orientation of a hoist lifting line
An indicating device is provided which includes a pivotal member mounted on a base plate attached to the frame of the trolley on which the hoist is supported, and a pair of spaced apart projections...
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5409346 |
Self-loading and unloading forklift truck
The chassis of a forklift truck includes a front assembly and a rear assembly which, in certain embodiments, are movable toward and away from each other between an extended stable normal working...
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5012939 |
Color coded boom and chart system for proportionally extensible boom assembly
In a multiple stage boom including a base boom and a plurality of relatively extensible and retractable boom stages, a system for displaying the load rating information relative to the boom...
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4809857 |
Drum rotation indicator
A drum rotation indicator for indicating the speed of raising and lowering a load by a crane winch. A rate generator connected to the winch develops electrical pulses having a frequency...
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4798299 |
Pivot ring
An improved pivot ring assembly which has a first and second annular member, one of which is mounted within the other, the first and second annular members having a first and second spaced apart...
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4664272 |
Telescoping crane boom with locking and indicator means
A power actuator on the base section of a multisection telescoping crane boom can bridge at least one intermediate boom section to operate a biased locking pin retract mechanism employed in a...
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4635805 |
Crane boom locking pin insertion indicator and actuator means
A power actuator on the base section of a multi-section telescoping crane boom can bridge at least one intermediate boom section to operate a biased locking pin retract mechanism employed in a...
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4467928 |
Pendant supported boom with fixed and live pendant portions
A pendant supported extensible boom is disclosed having the boom and a live mast pivoted to a base about an axis near the lowermost surface of the boom for providing a stowed mast-boom angle of...
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4359137 |
Safeload indicator for aerial lift platform apparatus
A workman's lift platform apparatus has a vertically swingable and extensible boom with a workman's platform at the outer end. A color coding indicating the amount of boom extension is provided on...
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4326601 |
Aerial lift platform apparatus with capacity indicator
A workman's lift platform apparatus has a vertically swingable and extensible boom with a workman's platform at the outer end. A color coding indicating the amount of boom extension is provided on...
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4258484 |
Implement position indicator
An adjustable contact portion is detachably secured to the mast of an implement such as a snow plow blade and the other contact is secured to the fluid operator in the mast which raises and lowers...
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4249474 |
Load-carrying slings
A sling has an indicator device which automatically registers the maximum permissible load which can be carried in accordance with the instantaneous angle of inclination of the strands of the sling.
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4172688 |
Device for anti-rolling signalling for cable laying tractors
A signalling device operatively coupled between the side arm or lifting boom of a pipe layer and the frame thereof in a predetermined fixed position such that movement of the signalling device...
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4141454 |
Crane with "Z" configured boom
A crane having a boom pivotally mounted mesially thereof to a mast which is itself pivotally mounted on a base platform. A generally horizontally disposed control beam is line attached to the free,...
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4099628 |
Towing vehicle
A towing vehicle which has a frame and a drive train for propulsion of the vehicle along a roadway and which includes a turntable mounted on the frame for rotation about a vertical axis, a boom...
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4098410 |
Safe load indicator for jib cranes
An overload warning device for use in a crane having a telescopic jib which includes, in a transmission between a slave jib and a pointer, a bank of cams each appropriate for a different length of...
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4078667 |
Control system for mechanical handling installation
The control system is of the type which is manually controlled by a suspended control box. Directional errors arise when the control box is twisted relative to the installation being controlled...
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3961685 |
Ladder working limit based ladder stopping device for aerial ladder truck
There is provided a ladder working limit based ladder stopping device for a vehicle equipped with a vertically and horizontally swingable and extensible ladder (or a fire engine truck), wherein a...
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3883859 |
Load height indication
Unseen loads on a tower crane are stopped at desired levels by an operator who is stationed at a location where the load cannot be seen. A rotation measuring device is mounted on the load cable...
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3865265 |
LIFT TRUCK SAFETY ACCESSORY
A safety accessory adapted for mounting on a lift truck for indicating to the operator the direction and precise degree of tilt of the mast either forwardly or rearwardly from a vertical position,...
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3833130 |
SAFETY DEVICE FOR A TOP BOOM PIVOTALLY MOUNTED ON A CRANE BOOM
A safety device for a top boom pivotally mounted on a main boom of a crane, in which a first control system arranged on the top boom of the crane includes an angle indicator, a power indicator, a...
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3796322 |
CRANE TROLLEY INDICATOR
A device for indicating the location of the trolley on the horizontal boom of a tower crane. A monitor on the trolley cable drive drum sends a signal to a meter in the operator's cabin within the...
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3791338 |
BOOM ANGLE INDICATOR
A boom angle indicator for mobile construction cranes and the like embodies a sending unit mounted directly on the boom pivot shaft and a coacting boom angle display unit in the operator's cab. The...
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3771668 |
TENSION SCALE SYSTEM FOR LIFTING CABLE OF A TELESCOPING BOOM CRANE
A crane having a telescoping boom which is extendable and contractable to various lengths, which boom has a cable trained thereover for lifting a load. A tension scale system is provided for the...
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3756423 |
OVERLOAD WARNING APPARATUS
An overload warning apparatus for cranes having a vertically angularly movable boom includes a boom radius cam coupled to the boom to be moved w1th changes in the angular elevaton of the boom, an...
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3513987 |
THREE-CRANE LIFTING BEAM
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3490606 |
HYDRAULIC CONTROL SYSTEM FOR MATERIAL HANDLING EQUIPMENT
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3269560 |
Safety control for cranes
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3265220 |
Safety control for extensible boom cranes
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3223249 |
Indicator for determining the boom angularity of a crane
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3217895 |
Safe load indicator for cranes and the like
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3200963 |
Moment comparator
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3139988 |
Indicator for cranes and the like
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3122125 |
Boom reach and angle indexing indicator
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2861700 |
Remote control handling unit
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