04773689 is referenced by 70 patents and cites 10 patents.

Releasable spider-type clamping apparatus for clamping to the end of a pipe comprises a system including a normal industrial line connection between a supply and control unit and the spider and a controllable operating device on the spider itself for operating and adjusting the clamp members, at least for the purpose of releasing them in the event the normal industrial line connection fails, the operating device comprising a pressure medium system with at least one pressure medium storage device and a wireless remote control and/or manual system.

Title
Apparatus for clamping to the end of a pipe
Application Number
7/51642
Publication Number
4773689
Application Date
May 20, 1987
Publication Date
September 27, 1988
Inventor
Jakob Wolters
Wegberg/Beeck
DE
Agent
Holman & Stern
Assignee
Wirth Maschinen Und Bohrgerate Fabrik
DE
IPC
B66C 1/56
View Original Source