 Method and system for concurrent computer transaction processing |
| The present invention is directed to a method, system, and bus agent for concurrent transaction ... |
|
| Real-time synchronization of concurrent views among a plurality of existing applications |
| A synchronization system includes a motion event synchronizer and multiple application ... |
|
| Data error correction circuit |
| It is an object of the present invention to provide a data error correction circuit wherein errors ... |
|
| Differential to single-ended converter utilizing inverted transistors |
| An object of the present invention is to provide a differential to single-ended converter using I.... |
|
| Semiconductor memory circuit |
| It is an object of the invention to provide a semiconductor memory circuit which is free from ... |
|
| Dynamic event selection network |
| What is claimed is: 1. A digital dynamic event selection network for telephone and real time ... |
|
| Neural network using random binary code |
| I claim: 1. A method of analog, parallel hardware implementation of neural networks with changeable ... |
|
| Astable multivibrator |
| What is claimed is: 1. The combination comprising: first and second transistors, each transistor ... |
|
| Music synthesizer |
| What I claim is: 1. In a music synthesis apparatus having associated music signal utilization means,... |
|
|
Telescoping mobile crane
| Details |
Inventors: Blase, Helmut; Hogemann, Arend; Schulze, Dieter;
Assignee: Harnischfeger GmbH (DE)
Primary Examiner: Spar; Robert J.
Assistant Examiner: Noland; Kenneth
Attorney, Agent or Firm: McGlew and Tuttle
A telescopic, mobile crane comprising, a first base member pivotally mounted on a carriage, a second telescopic member telescopically engaged with the first member, an idle or manual member telescopically engaged to the second member and a drive piston and cylinder unit connected between the first and second members for extending the second member from the first member. An arresting apparatus is connected between the piston and cylinder arrangement and the idle member for extending the idle member. When the idle member is extended, the first and second members are locked to each other by a pawl and pin arrangement and the second member is disengaged from the piston and cylinder arrangement. After the idle member is extended, the first and second members are unlocked from each other to permit the extension of the second member. |
|
DETAILED DESCRIPTION The invention is directed to a device which performs the operating of extending or retracting the idle telescoping part in a shortest possible time, for example, with the aid of a so-called double cylinder, and which saves manual operations by a partial automation.
In contradistinction to the prior art telescopic cranes, particularly in mobile cranes, the inventive telescopic crane comprising for example, a four-part jib, can be extended by the idle telescoping part within a relatively short period of time of two minutes, for example.
Such an operation can be performed by a single person, so that the operational costs of the inventive telescopic crane may considerably be reduced as compared to the prior art.
Accordingly, an object of the present invention is to provide a telescopic crane comprising, a first member, a second member telescoptically engaged with the first member, an idle or manual member telescopically engaged with the second member, drive means connected to the first member and operatively connected to the second member for extending the second member, arresting means between the drive means and the idle member for establishing engagement between the drive means and the idle member to extend the idle member, and locking means between the first and second members for establishing engagement between the first and second members to restrain the second member from being extended by the drive means when the drive means is activated to extend the idle member.
The drive means may comprise a piston rod and cylinder arrangement.
In another embodiment of the invention, the idle telescoping part can be coupled to the piston rod or cylinder extension in a simple way, without difficult handling, with the oblong slots permitting a quick coupling by means of a spring-loaded bolt.
The provision of a pivoting handle according to another embodiment makes it possible to actuate the spring loaded bolt easily, and two definite positions may be predetermined for the bolt, which are clearly indicated by the position of the handle
|
|
Fault Detection 
