|
US1793438A
|
|
Hydraulically-operated shovel
|
|
GB268368A
|
|
Improvements in excavators of the dipper type
|
|
GB257934A
|
|
Improvements in and relating to dippers and similar excavating units
|
|
US1574763A
|
|
Dipper trip
|
|
GB227648A
|
|
Improvements in or relating to power excavators cranes and the like
|
|
GB215318A
|
|
Improvements in or relating to power excavators, cranes and the like
|
|
GB210800A
|
|
Improvements in or relating to power shovels
|
|
GB211830A
|
|
Improvements in or relating to excavators or the like
|
|
US1574492A
|
|
Dipper trip
|
|
GB225606A
|
|
Improvements in or relating to creeping traction mechanism
|
|
GB227076A
|
|
Improvements in or relating to vehicles with creeping traction mechanism
|
|
GB226852A
|
|
Improvements in or relating to heavy portable machinery such as excavators and digging machinery
|
|
US1563568A
|
|
Winch control mechanism
|
|
US1646718A
|
|
Brake
|
|
US1486834A
|
|
Saddle-block structure for power shovels
|
|
US1564791A
|
|
Rope-thrusting shovel
|
|
US1629818A
|
|
Bushing
|
|
US1560792A
|
|
Portable engine
|
|
US1572134A
|
|
Removable wheel
|
|
US1616673A
|
|
Creeping-traction mounting for railway-type excavators
|
