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Class 212/248 - Including rack or worm


Subclass of Class 212 - Traversing hoists
Definition: Apparatus wherein the second toothed member comprises either
No. of patents: 16
Last issue date: 03/27/2007


NumberTitleIssue Date
7195126Self-propelled working machine
In a self-traveling working machine such as a crane, a working attachment such as a boom is arranged to transversely extend below an operator's cabin in such a manner that part of the cabin overlaps the attachment, it being arranged that during crane operation, the ...
03/27/2007
6010080Multiple function mobile device for handling equipment
The device is for mounting on a self-propelled vehicle which hydraulically operate the device. The device includes an articulated boom, a boom support on which the articulated boom is mounted, the articulated boom being fixed to the boom support. The equi...
01/04/2000
5323690Fluid actuator assembly for imparting rotational movement to a boom
A linear movable apparatus for imparting rotational movement to a turntable is provided. The turntable is secured to a rotatably mounted shaft having a ring gear thereon for meshed engagement with gear teeth provided on a piston rod which extends between ...
06/28/1994
5203837Balanced lifting crane
A crane has a generally horizontally disposed main boom arm centrally pivotally mounted on a turret supported for rotation atop a central column. The main boom arm supports a load at one end and a counterweight at its other end. The main boom arm load sup...
04/20/1993
5163570Load sensing device for a boom mounted on a vehicle
The present invention comprises a hydraulic sensing means to be used in connection with a worm/worm wheel gear arrangement for articulating a boom mounted on a vehicle. A hydraulic chamber on each side of the worm is formed by a bearing retainer and a pis...
11/17/1992
5040428Swing reduction gear assembly
A swing reduction gear assembly for a swing device which prevents admission of grease into the same and in which the pressing force of grease squeezed out from between mutually meshing teeth of a pinion and an internal gear wheel thereof is reduced. The s...
08/20/1991
4794662Remotely operated chimney cleaning apparatus
The invention is a self-contained chimney cleaning apparatus. A winch operated wire brush is attached by cable to a winch pulley, which is in turn mounted to a pivoting housing. The pivoting housing is suspended over the opening of the chimney flue, and r...
01/03/1989
4768662Self-locking hydraulic pivot device for interconnecting a support cage to a boom
A hydraulic pivot device for pivotally connecting a support housing to a boom of the type secured to a vehicle. The hydraulic pivot device comprises a main housing having a gear-engaging piston which is axially displaceable in a piston cylinder provided t...
09/06/1988
4601402Steerable concentric ring segment supported lift crane
Front and rear pairs of crawler assemblies are provided for supporting concentric ring segments disposed forwardly under the boom and rearwardly under the counterweight so the crane can travel under load and swing through at least a partial horizontal arc...
07/22/1986
4505396Wheeled working vehicle with crane
In a working vehicle including a crane (21) for handling loads and a driver's cab (11), both crane and cab are rotatably mounted on the vehicle, each about its vertical axis, and controlled such that a turning angle ଲ of the crane results in a turni...
03/19/1985
4336889Ring 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
4307621Swing drive assembly for machines having rotatable frames
In a machine having a lower frame, an upper frame having at least one upright wall section, rotatably mounted on the lower frame, and a ring gear mounted on the lower frame, an assembly for swinging the upper frame relative to the lower frame comprising a...
12/29/1981
4170854Joint between the lower portion and the main portion of a loading crane post and a method of providing such a joint
An improved joint and method of providing such a joint between the upper and lower portions of a rotatably driven crane post, comprising a sleeve-shaped member formed internally with screw threads and provided at the lower end of the upper position, a pin...
10/16/1979
4111316Truck mounted hoist
Hoist apparatus of the type adapted to be mounted on a truck adjacent the truck bed, leaving the truck bed clear, for use in unloading or loading the truck or the like, and comprising a boom, hoist means on said boom, a vertical support column, said boom ...
09/05/1978
4100973Side load protection arrangement for rotating equipment
A brake release arrangement by which damage which otherwise would result from the application of excessive side loading to rotating equipment such as the boom of a digger derrick or crane is avoided. The drive system for rotating the boom includes a hydra...
07/18/1978
3961713Single line davit
A new and improved davit utilizing a single line which is mounted onto a rotating drum supported by opposing spaced frame members, which frame members are mounted onto a rotatable base, which rotatable base is rotated by a motordriven pinion in engagement...
06/08/1976
 
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