Truck crane having an elongated main frame
US4397396A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 7, 1980 |
| Grant date | Aug 9, 1983 |
| Priority date | — |
| Expiry date | Nov 7, 2000 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66C23/78
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A mobile truck crane having an elongated main frame that forms the carriage for the crane as well as forming a fore and aft elongated outrigger for stabilization in the crane operative position. A pair of transversely swingable outriggers are attached intermediate the length of the main frame and act to stabilize the crane in transverse directions. The main frame is formed of rectangular tubular cross section and is of such shape as to have a high strength-to-weight ratio and which is particularly rigid and capable of transmitting high, concentrated loads in an efficient manner from a revolvable upper that includes a telescoping boom. The main frame includes an intermediate tub which is fabricated to transmit loads from the upper superstructure to all four outriggers of the main frame. The crane finds particularly utility when used as a mobile truck crane of the self-propelled type in which the power source is located on the upper, revolvable superstructure and which provides power through a right angle drive downwardly through the tub and to a power transmission located at the underside of the main frame for furnishing driving power to the ground engaging wheels. The superstructur…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.