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US3722705A Expired / Lapsed US ⏱️ 0.0 years remaining

Marine crane particularly designed for handling cargo containers

Assignee: Individual
•
Filing: 1971-05-28
•
Granted: 1973-03-27
•
Expires: 1991-05-28
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Abstract

Abstract There is disclosed a mobile crane for loading and unloading marine vessels. The crane is mounted for travel on widely spaced apart runway track means extending parallel to the waterside edge portion of a marine pier. The crane comprises a central tower structure supporting a fixed boom extending therefrom in a shoreside direction and a hinged boom supported thereby extending therefrom in a waterside direction. A traveling counterweight means is mounted for travel only over the fixed boom and at a given level and a load supporting means is mounted for greater travel than said counterweight means and travels over both said fixed boom and said hinged boom and at a lower level than said counterweight means. Preferably, the travel of the counterweight means is one-half that of said load supporting means. The counterweight means and the load supporting means are interconnected and preferably by wire rope and sheave means and in a way to provide a two-part reeving system between the load supporting means and the counterweight means. Also, the load supporting means is self-powered and clamping means, preferably hydraulically operated, are carried by said load supporting means to engage or disengage the wire rope means and cause selective traveling movement thereof and of counterweight means secured thereto. The central tower structure carries the boom hoist machinery and the center of mass of such machinery and of the tower structure is waterside of the center line between the runway track means on which the crane travels. The boom hoist machinery is electrically powered and positioning limit switch means are included in the electric circuitry of such hoist machine so that predetermined positions of said traveling counterweight means and said load supporting means must obtain before the boom hoist machinery is operable. The traveling load supporting means carries a rectangular frame which is designed for use in loading and unloading large bulky loads, as cargo containers, from marine vessels which may have a list and/or trim. A power actuated means is provided for determining the angular relation of said rectangular frame to a horizontal plane and thus permitting adjustment thereof to match the particular trim of the marine vessel being loaded or unloaded. Such power actuated means is shown as being hydraulic. A plurality of rope means depend from said rectangular frame and the relative lengths thereof are selectively power actuated to compensate for the list of the marine vessel.

Inventors

  • 👤 C Gould

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-04 14:39
CPC Classifications
B; B66; B66C; B66C19/00; B66C19/002

Claims Analysis

Total Claims: 16
Claim 1
Independent Claim 145 words
A crane for use on a marine pier comprising a central tower structure; a fixed boom supported by said central tower structure; a hinged boom hingedly supported by said central tower structure at one end portion thereof, said hinged boom extending in substantially a vertical plane when in a first position and extending in a horizontal plane and in a waterside direction when in its second position; traveling counterweight means mounted for travel over said fixed boom; traveling load supporting means mounted for travel over said fixed boom and over said hinged boom, when the latter is in its second position; and interconnecting means connecting said traveling counterweight means and said traveling load supporting means for travel in opposite directions and limiting the travel of the counterweight means to a portion of that of the load supporting means and to travel over said fixed boom.
Claim 2
Dependent Claim 145 words
A crane for use on a marine pier comprising a central tower structure; a fixed boom supported by said central tower structure; a hinged boom hingedly supported by said central tower structure at one end portion thereof, said hinged boom extending in substantially a vertical plane when in a first position and extending in a horizontal plane and in a waterside direction when in its second position; traveling counterweight means mounted for travel over said fixed boom; traveling load supporting means mounted for travel over said fixed boom and over said hinged boom, when the latter is in its second position; and interconnecting means connecting said traveling counterweight means and said traveling load supporting means for travel in opposite directions and limiting the travel of the counterweight means to a portion of that of the load supporting means and to travel over said fixed boom.
Claim 3
Dependent Claim 23 words
The combination of claim 1, wherein said portion of travel of the counterweight means to that of the load supporting means is one-half.
Claim 4
Dependent Claim 24 words
The combination of claim 1, wherein said interconnecting means comprises wire rope and sheave means interconnecting said counterweight means and said load supporting means.
Claim 5
Dependent Claim 16 words
The combination of claim 3, wherein said wire ropes and sheaves employ a two-part reeving system.
Claim 6
Dependent Claim 29 words
The combination of claim 3, wherein the sheave means comprises sheave means carried by said traveling load supporting means and said wire rope means passes over said sheave means.
Claim 7
Dependent Claim 70 words
The combination of claim 1 of stop means movable into and out of the path of travel of said traveling load supporting means, carried by the hinge end portion of said hinged boom, and moves into the path of travel of the traveling load supporting means, as the hinged boom moves to its first position and moves out of said path, as the hinged boom moves to its second position.
Claim 8
Dependent Claim 75 words
The combination of claim 1 with a crane runway first track means disposed on said pier and extending parallel to the waterside edge portion of said pier; a crane runway second track means disposed on said pier in parallel and substantial spaced relation to said first trackway means; and a central tower structure characterIzed by having its horizontal center of mass disposed waterside of the center line between said first and said second track means.
Claim 9
Dependent Claim 83 words
The combination of claim 1 with a first crane runway track means disposed on said pier and extending parallel to the waterside edge portion of said pier; a second crane runway track means disposed on said pier in parallel and spaced relation to said first track means; hoisting machinery means for operating said hinged boom, carried by said central tower structure and disposed thereon with its horizontal center of mass disposed waterside of the center line between said first and second track means.
Claim 10
Dependent Claim 63 words
The combination of claim 1, wherein said traveling load supporting means is self-powered; wire ropes are connected with said counterweight means; electrically controlled rope clamps are carried by said traveling load supporting means; and electrical interlock limit switches are disposed in the electrical circuit powering said rope clamps and positioned to be tripped by said traveling counterweight means at a predetermined position thereof.
Claim 11
Dependent Claim 50 words
The combination of claim 9 with counterweight means stop bar means for securing said counterweight means at a predetermined location, electrical limit switch means tripped by said counterweight means at a predetermined position thereof, and an electric circuit for said electrically controlled rope clamps including therein said limit switch means.
Claim 12
Dependent Claim 143 words
A crane for use on a marine pier comprising a central tower structure; a fixed boom supported by said central tower structure; an electrically powered hinged boom means hingedly supported by said central tower structure and movable from a second horizontal position to a first vertical position; a traveling counterweight means mounted for travel limited to over said fixed boom; an electrically powered traveling load supporting means mounted for travel over said fixed boom and over said hinged boom when in its second position; interconnecting means connecting said traveling counterweight means and said traveling load supporting means for travel in opposite directions and limiting the travel of the counterweight means to a portion of that of the load supporting means; and electrical interlock means limiting electrical energizing of said electrical powered hinged boom means until predetermined positions are reached by said traveling means.
Claim 13
Dependent Claim 143 words
A crane for use on a marine pier comprising a central tower structure; a fixed boom supported by said central tower structure; an electrically powered hinged boom means hingedly supported by said central tower structure and movable from a second horizontal position to a first vertical position; a traveling counterweight means mounted for travel limited to over said fixed boom; an electrically powered traveling load supporting means mounted for travel over said fixed boom and over said hinged boom when in its second position; interconnecting means connecting said traveling counterweight means and said traveling load supporting means for travel in opposite directions and limiting the travel of the counterweight means to a portion of that of the load supporting means; and electrical interlock means limiting electrical energizing of said electrical powered hinged boom means until predetermined positions are reached by said traveling means.
Claim 14
Dependent Claim 38 words
The combination of claim 11, wherein said electrical interlock means limits powering of said electrically powered hinged boom means until said traveling counterweight means is in a predetermined position at the waterside end portion of the fixed boom.
Claim 15
Dependent Claim 38 words
The combination of claim 11, wherein said electrical interlock means limits powering of said electrically powered hinged boom means until said traveling counterweight means is in a locked position at the waterside end portion of the fixed boom.
Claim 16
Dependent Claim 56 words
The combination of claim 11 with a traveling load supporting stop bar means for limiting travel of the traveling load supporting means past a predetermined station, electrical limit switch means tripped by said traveling load supporting means at a predetermined position thereof, and an electrical circuit connecting said limit switch means with said electrical interlock means.

References Cited (Backward Citations)

No citation records indexed.

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1976-03-26 1976-09-25 1977-03-27 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1980-03-26 1980-09-25 1981-03-27 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1984-03-26 1984-09-25 1985-03-27 $7700.00 Window Closed / Lapsed

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