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"That’s an amazing invention, but who would ever want to use one of them?"
President Rutherford B. Hayes ; Said in 1876, after Alexander Graham Bell demonstrated the telephone to him at the White House
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| Number | Title | Issue Date |
| 4512711 | Unloading of goods, such as bulk goods from a driven, suspended load-carrier A method for controlling the lateral displacement of a trolley supporting goods to be unloaded at an unloading location, the goods being releasably attached to the trolley by an elongated flexible member. The method is characterized in that the trolley, w... | 04/23/1985 |
| 4496063 | Method of handling slabs by an overhead traveling crane provided with a slab grip lifter A method of handling slabs by an overhead traveling crane having a slab grip lifter comprises disengaging a brake for a lifter swinging motor and a brake for a crab moving motor in the beginning, causing the position of the lifter to be adjusted by a reac... | 01/29/1985 |
| 4491229 | Boom extension stowage system A multi-section crane boom is provided with a fly section and a jib section which may be erected and supported by a mast and pendants on the end of the boom to extend the effective length of the boom. When the fly section and jib section are not used they... | 01/01/1985 |
| 4435118 | Method of controlling horizontal motion of a load application point on an articulated crane A method and apparatus for controlling the horizontal motion of a double articulated crane comprises determining the angle about a common axis between a base member pivotally mounted on a crane post and a head member carrying a load application point on a... | 03/06/1984 |
| 4396126 | Telescoping crane boom Apparatus and method for extending a fly section of a telescopic crane boom which fly section does not have its own power extension/retraction unit. The crane boom comprises at least a first or fly section, a second section, and a third or base section. L... | 08/02/1983 |
| 4364545 | Well servicing apparatus A suspension structure is disclosed for use in running well hardware such as a pumping assembly by cable into a well and pulling the hardware from the well, the structure including two suspension masts. One of the masts is a lightweight mast having a work... | 12/21/1982 |
| 4360304 | Extendable crane trolley and method A horizontally extendable trolley 22 comprising a trolley frame 51 and wheels 52 for supporting trolley frame 51, and a horizontally elongated trailer frame 54 slidably mounted on frame 51, said trailer frame 54 having a first end extending beyond an end ... | 11/23/1982 |
| 4336889 | Ring supported truck crane and method of setting up A ring supported, self-propelled truck crane and method of operation is disclosed wherein a boom is mounted on the chassis for pivotal movement only about a horizontal axis. The chassis is driven into an incomplete segmented ring set up at a working site ... | 06/29/1982 |
| 4318488 | Method of extending a jib of a telescopic crane Method for extending a jib of a telescopic crane which jib may be stored alongside a base section when not in use. The crane boom comprises at least the base section, a second section with linearly extendable power means, an extension pivotably mounted on... | 03/09/1982 |
| 4274542 | Method for transfer of crane from tower A method of transferring a crane from a tower to an adjacent elevated site, such as a building under construction. The crane is raised from the tower by an elevating frame secured at one end to the tower. A transition section is inserted between the crane... | 06/23/1981 |
| 4222492 | Method for extending a boom assembly The overall length of boom assembly can be increased by the use of a pair of boom extension sections. When the boom extension sections are not required, they are supported at storage locations adjacent to one side of a main boom assembly. When the overall... | 09/16/1980 |
| 4184600 | Method for removing a bearing assembly of a pedestal crane and a removable bearing assembly for a pedestal crane The method for removing a bearing assembly disposed between a revolving turntable of a pedestal crane assembly and the pedestal and a removable bearing assembly for a pedestal crane, wherein the method includes activating a support member coacting between... | 01/22/1980 |
| 4165005 | Method and apparatus for the installation of the support element of a crane A support element is disclosed which is movable vertically with respect to a frame of a wheeled vehicle as a result of extension of one or more extensible members of the support element. The support element is suspended from the frame by at least one susp... | 08/21/1979 |
| 4144974 | Method of temporarily increasing the load capacity of a powered drum hoist A convertible crane is provided with a main trolley which carries a powered hoist along a horizontal path. A trailer trolley also carries a hoist which is powered from the main trolley. Each of the hoists thus have a powered drum which will increase the t... | 03/20/1979 |
| 4047618 | Crane construction and method of operation A crane having a multisection telescopic boom is disclosed herein. The multisection boom is designed so that the intermediate and forward sections can be moved rearwardly with respect to the base section to decrease the overall length of the crane for tra... | 09/13/1977 |
| 4003472 | Crane hook heave compensator and method of transferring loads A floating barge crane that is provided with a heave compensator package between the traveling block of the crane and the load hook of the crane and with the package containing substantially all of the components of a hauldown system. The hauldown system ... | 01/18/1977 |
