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...that after Walter Hunt patented the safety pin in 1849, he sold the rights to it for $400?
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| Number | Title | Issue Date |
| 4905850 | Quick disconnect boom mount A quick disconnect boom mount having integral fluid conduits for use with master part transfer booms having changeable part handling spider booms. The coupling utilizes a rotary locking member, having an eccentric cam disposed thereon, which rigidly clamp... | 03/06/1990 |
| 4898287 | Quick disconnect boom mount A quick disconnect boom mount having integral fluid conduits for use with master part transfer booms having changeable part handling spider booms. The coupling utilizes a rotary locking member, having an eccentric cam disposed thereon, which rigidly clamp... | 02/06/1990 |
| 4880123 | Method for converting a digging boom to a lifting boom A method for converting the angulate form boom of a digging machine such as a backhoe or the like into a substantially straight lifting boom. The original angulate form boom is separated into two parts in the vicinity of the angular transition and is real... | 11/14/1989 |
| 4856662 | Pedestal crane and method of assembling and erecting it A method of installing a boom on the top of a high vertical tower comprising vertically positioning a first tower section and securing the tower section to a base; installing a plurality of additional tower sections in consecutive order on top of the firs... | 08/15/1989 |
| 4653655 | Crane boom having variable angle offset capability A mobile crane having a boom and a boom extension connected thereto with a toggle linkage for connecting the boom extension to the boom to allow the boom extension to be offset from the boom by one of a plurality of predetermined angles. A pair of double ... | 03/31/1987 |
| 4621742 | Boom extension storage means and mechanisms A mobile crane comprises a multi-section telescopic main boom and a boom extension pivotally connected to the point end of the main boom. The boom extension can be manually swung horizontally between an in-use position extending axially from the point end... | 11/11/1986 |
| 4558791 | Furnace delining apparatus A furnace delining apparatus has a telescopic jib mounted about a horizontal pivot axis on a turntable. The distal end of the jib carries a tool on a carrier swingable about an axis transverse to the jib axis. The carrier is pivotally mounted on a jib ext... | 12/17/1985 |
| 4540096 | Truss boom A truss boom having an extension member equipped with a pulley and a hook, comprising a pyramidal support frame is disclosed.... | 09/10/1985 |
| 4524873 | Method and apparatus for disassembling sectional boom of tower crane at terminal heights An apparatus for the safe, cost-efficient disassembling of a sectionalized tower crane boom is provided that enables disassembling of the boom while the boom is at terminal heights. The disassembling apparatus includes a working platform that may be detac... | 06/25/1985 |
| 4512482 | Multiple offset crane boom extension A crane boom extension or jib is held on the nose of the boom by a single fixed length self-adjusting cable loop which extends around an arcuate guide attachable at several different locations to an inclined plane mounting bracket on the jib near its oute... | 04/23/1985 |
| 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 |
| 4484686 | Multiple offset boom extension A side stowable swing-around boom extension is pinned on the nose of a telescoping crane boom in a first use position nearly coaxial with the center line of the boom but tilted or offset therefrom at a small angle. Two larger angularly offset use position... | 11/27/1984 |
| 4483447 | Safety mounting for side stowable boom extension or jib A swing-around side stowable jib for crane booms is safely supported at all times during movement from its use position to its stowed position, and vice versa. In the short transitional movement of the jib following its release from its nose assembly pivo... | 11/20/1984 |
| 4431109 | 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... | 02/14/1984 |
| 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 |
| 4293269 | Conversion or extension beam An extension beam is provided to convert a hydraulic excavator to a crane-type hoisting vehicle or to extend the length of a boom.... | 10/06/1981 |
| 4290731 | Apparatus for picking up overturned vehicles An apparatus for righting or picking up overturned vehicles is provided. In the illustrated embodiment, the apparatus is a truck-mounted turntable able to rotate in either direction supporting a first pair of parallel frame members which are moved through... | 09/22/1981 |
| 4276985 | Truck mounted railroad crane Apparatus for substantially increasing the load lifting capacity of mobile vehicles, such as truck mounted railroad cranes and the like, without a proportionate increase in the weight thereof, including stabilizing outrigger assemblies integrally supporte... | 07/07/1981 |
| 4269396 | Wrecker-hoist attachment for truck bed A wrecker-hoist combination attachment for mounting on the bed of a truck includes an A-frame having one end supported by the truck bed and the upper apex supported by a support member connected between the apex of the A-frame and the truck bed. The A-fra... | 05/26/1981 |
| 4241837 | Convertible articulated crane An articulated boom crane, constructed to allow convenient conversion to straight boom crane operation, and having a secondary boom that has adjustably extensible members supporting a boom tip assembly and that can be selectively coupled to a main boom ei... | 12/30/1980 |
| 4214665 | Truck mounted railroad crane boom section A crane boom section for a crane boom superstructure on a truck mounted railroad crane or the like is disclosed as including an enclosed exterior with spaced inner cross brace supports preventing twisting or bending of the crane boom section when subjecte... | 07/29/1980 |
| 4159059 | Truss boom for material handling truck A truss boom attachment for mounting on a fork assembly operatively mounted on a material handling truck. The fork assembly includes a rigid upright frame which receives a pair of load carrying forks. The truss boom attachment comprises a generally longit... | 06/26/1979 |
| 4106631 | Fly and jib assembly for crane A multisection crane boom having a fly and jib assembly attachable thereto is disclosed herein. The fly section and jib section of the assembly are pivotally interconnected at adjacent ends through a freely pivoted link so that the jib section can be pivo... | 08/15/1978 |
| 4091936 | Apparatus 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... | 05/30/1978 |
| 4064615 | Method and device for dismounting or mounting jib sections on a tower crane The invention relates to a method of dismounting or mounting jib sections on a tower crane, at which a carrying cradle with counterweight and having the form of a three-armed lever is used for lowering or hoisting jib sections to be dismounted and mounted... | 12/27/1977 |
| 4002242 | Vehicle cranes In vehicle-mounted cranes comprising a hoisting arm consisting of two hingedly interconnected arm sections the outer one of which is equipped with a longitudinally displaceable boom, a bracket removably attachable to the outer end of said boom and to whic... | 01/11/1977 |
| 3977148 | Jib having two adjustable elements This invention relates to a jib of a public works machine constituted by two elements, a piece for connecting said two elements, and removable means for locking the piece to the elements. The connecting piece is mounted on one element and comprises first holes... | 08/31/1976 |
| 3945333 | Means for storing and connecting jib for telescopic boom of mobile crane A mobile crane has a multisection telescopic boom and an optionally useable lattice jib storable alongside the boom with the base end of the jib adjacent the point end of the boom. One side of the boom base section is provided with a pair of longitudinall... | 03/23/1976 |
