초록 ▼

A lifting platform with a scissor type jack. The jack includes a plurality of inter-connected struts pivotally connected to a base forming a double X strut arrangement. A power actuator is connected to at least one strut in each X to effect extension and retraction of the jack. A safety latch is pro

A lifting platform with a scissor type jack. The jack includes a plurality of inter-connected struts pivotally connected to a base forming a double X strut arrangement. A power actuator is connected to at least one strut in each X to effect extension and retraction of the jack. A safety latch is provided to prevent accidental retraction of the jack from an extended position should the power actuator fail to hold the jack in the elevated position.

대표청구항 ▼

A lifting platform with a scissor type jack. The jack includes a plurality of inter-connected struts pivotally connected to a base forming a double X strut arrangement. A power actuator is connected to at least one strut in each X to effect extension and retraction of the jack. A safety latch is pro

A lifting platform with a scissor type jack. The jack includes a plurality of inter-connected struts pivotally connected to a base forming a double X strut arrangement. A power actuator is connected to at least one strut in each X to effect extension and retraction of the jack. A safety latch is provided to prevent accidental retraction of the jack from an extended position should the power actuator fail to hold the jack in the elevated position. ion stroke and second, the exhaust stroke and the compression stroke are adapted to be carried out simultaneously. 6. The internal combustion engine according to claim 5, wherein inlet valves for fresh gas are provided on the first cylinder. 7. The internal combustion engine according to claim 5, wherein outlet valves for expelling the exhaust gas to an exhaust line are provided on the second cylinder. 8. The internal combustion engine according to claim 5, wherein the combustion shaft is rotatable in the same manner as the crank shaft. 9. The internal combustion engine according to claim 1, wherein the rotatably mounted combustion rotary valve is a combustion shaft, which preferably has a circular cross-section. 10. The internal combustion engine according to claim 9, wherein at least two combustion chambers are mutually spaced in the peripheral direction in the combustion shaft and are preferably arranged symmetrically relative to the rotational axis of the combustion shaft. 11. The internal combustion engine according to claim 9, wherein the combustion shaft is adapted to be driven in synchronism with the crank shaft. 12. The internal combustion engine according to claim 9, wherein the combustion shaft includes two combustion chambers and is adapted to be driven at substantially half the rotational speed relative to the crank shaft and includes an Otto engine. 13. The internal combustion engine according to claim 9, wherein a respective portion of the combustion shaft projects into the first cylinder and into the second cylinder, whereby the respective cross-sections of the portions substantially form a 90° segment of the circular cross-section of the combustion shaft which has an angular range of up to 90°. 14. The internal combustion engine according to claim 13, wherein the two pistons include a respective recess for resting on the respective portion of the combustion shaft or the housing for the combustion shaft. 15. The internal combustion engine according to claim 9, wherein the combustion shaft includes four combustion chambers and is adapted to be driven at substantially a quarter of the rotational speed relative to the crank shaft. 16. The internal combustion engine according to claim 15, wherein the combustion shaft includes a diesel engine. 17. The internal combustion engine according to claim 9, wherein an injection nozzle for the fuel includes a spark plug that is or are arranged on a housing surrounding the combustion shaft. 18. The internal combustion engine according to claim 17, wherein an injection nozzle for the fuel includes a spark plug that is located on the cylinder head. 19. The internal combustion engine according to claim 9, further includes a suction rotary valve, which is preferably arranged in parallel with the combustion shaft and fresh gas is adapted to be conveyed to the first cylinder in the axial direction thereof. 20. The internal combustion engine according to claim 19, wherein the suction rotary valve rotate at substantially the same rotational speed as the crank shaft and is driven thereby. 21. The internal combustion engine according to claim 19, wherein an exhaust gas channel, which is at least intermittently open relative to the second cylinder volume during the exhaust stroke, is formed in the suction rotary valve. 22. The internal combustion engine according to claim 9, wherein the crank shaft is rotatable in the opposite sense relative to the combustion shaft and the suction rotary valve. 23. The internal combustion engine according to claim 22, wherein the first cylinder follows the second cylinder at an angular displacement of the crank shaft of 90°, 180° or 270°. 24. The internal combustion engine according to claim 9, wherein the crank shaft and the combustion shaft are rotatable in the same sense but in the opposite sense relative to a suction rotary valve. 25. The internal combustion engine according to claims 24, wherein the crank shaft rotates in the opposite sense re lative to the combustion shaft and the suction rotary valve, and the second piston follows the first piston with an angular displacement of 90°, 180° or 270°. 26. The internal combustion engine according to claims 9, wherein the combustion chambers are at a fixed position in relationship to the first cylinder and the second cylinder and are connectable by a control device to the first cylinder and the second cylinder. 27. The internal combustion engine according to claims 26, wherein the control device is adapted to be driven in synchronism with the crank shaft. 28. The internal combustion engine according to claims 27, wherein the control device includes a rotatably mounted body having at least one passage opening from the cylinder volumes to the combustion chambers. 29. The internal combustion engine according to claim 28, wherein the rotatably mounted body includes a control shaft that is in parallel with the crank shaft and includes a circular cross-section. 30. The internal combustion engine according to claim 29, wherein two mutually separated combustion chambers are alternately connectable to the first cylinder volume and the second cylinder volume by means of the control shaft. 31. The internal combustion engine according to claim 29, wherein the control shaft includes a circular cross-section incorporating a curved recess for the passage opening. 32. A process for operating an internal combustion engine comprising: compressing fresh gas in a first cylinder volume incorporating a first piston during at least one compression stroke and is forced into one of at least two combustion chambers which are arranged in a rotating combustion rotary valve, wherein combustion of a mixture consisting of the compressed fresh gas and at least partially evaporated fuel is initiated after the combustion chamber has been closed relative to the first cylinder volume; opening the combustion chamber relative to a second cylinder volume and the expanding combustion gases from the combustion chamber are applied to a second piston in the second cylinder volume for performing a working stroke; expelling exhaust gases from the second cylinder volume, wherein the first cylinder volume is spaced from the second cylinder volume in the axial direction of the combustion rotary valve following the completion of the working stroke; and transferring compressed fresh gas from the first cylinder volume to the second cylinder volume by the combustion rotary valve. 33. The process according to claim 32, further includes the successive opening in a synchronous movement of the two combustion chambers relative to the first cylinder volume and the second cylinder volume. 34. The process according to claim 33, wherein the synchronous movement is at a continuous speed. 35.The process according to claim 32, further includes closing the respective combustion chamber relative to the second cylinder volume after the working stroke and then inserting fuel into the combustion chamber and then inserting fresh air into the combustion chamber that is filled with at least partially evaporated fuel in a following compression stroke. 36. The process according to claim 35, further includes at least partially transferring residual exhaust gases, which are present in the combustion chamber, from the combustion chamber to an exhaust line following the closure of a combustion chamber relative to the second cylinder volume. 37. The process according to claim 35, wherein an inlet connector that intermittently connects the first or the second cylinder volume to a suction line and an outlet connector that intermittently connects the first or the second cylinder volume to an exhaust line rotate in synchronism with the two combustion chambers, whereby the two combustion chambers are held closed relative to the cylinder volume during the respective suction and exhaust connecting processes. 38. The process according to claim 37, wherein there are provided two combustion chamb