Other

Ab Bofors

Lars Olof Lundin

Gerhard Berr

Magnus Horn

Henk Ravenshorst

Armin Ihle

In a multipart cooled piston ( ) for a combustion engine with a piston upper part ( ) of steel comprising a combustion bowl ( ) and a ring wall ( ) with ring belt ( ), and with a piston lower part ( ) comprising a piston skirt ( ), pin bosses ( ) for receiving the piston pin connecting the piston ( ) to the connecting rod, and pin boss supports ( ) connected to the piston skirt ( ), and in a method for manufacture of such a piston ( ), inexpensive manufacture and good form stability are to be achieved in that a cooling channel ( ) formed inside the piston upper part ( ) has forged supporting ribs ( ) in its area extending to the combustion bowl ( ), which each form sections of an all-round ring rib ( ) with a connection surface radially to the longitudinal piston axis (K), in that the piston lower part ( ) has an annular and all-round carrier rib ( ) with a connection surface connected to the pin boss supports ( ), and in that the piston upper part ( ) and the piston lower part ( ) are non-detachably connected by means of the connection surfaces of the ring rib ( ) and the carrier rib ( ).

Multipart cooled piston for a combustion engine and method for manufacture thereof

Package with a closing device

A hydraulic control and driving apparatus for a self-propelled artillery piece includes hydrostatic transmissions for the driving wheels which are driven by hydraulic motors and variable displacement hydraulic pumps. The apparatus includes means for training, elevating and firing the artillery piece by diverting hydraulic fluid from one main pump to the appropriate control elements.

Device for generating oil pressure for an artillery piece or a

The present invention relates to an apparatus providing for the co-ordinated driving of a towing vehicle and a towed vehicle equipped with a hydrostatic driving system of its own. The respective driving wheels of the towed vehicle are each driven by a separate hydrostatic transmission and a variable output hydraulic pump coupled to a hydraulic motor which can be driven by output of said hydraulic pump and can be engaged with a driving wheel. The apparatus includes for each respective transmission control circuits having a control device mounted on the towing vehicle. The invention is particularly useful for a cross-country towing vehicle and a towed vehicle in the form of a heavy field artillery gun which for purposes of operating the hydrostatic transmissions is equipped with a reciprocating engine, for instance a gasoline engine, which actuates said transmissions via a dividing gear box.

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Karlskoga, Sweden

Lars Olof Lundin