초록 ▼

Front-rotary working machine employs a vertical engine having an output shaft projecting downward, and a transmission case, provided beneath the vertical engine, has a flat underside so as to extend generally parallel to the ground surface to be cultivated. Distance between left and right transporti

Front-rotary working machine employs a vertical engine having an output shaft projecting downward, and a transmission case, provided beneath the vertical engine, has a flat underside so as to extend generally parallel to the ground surface to be cultivated. Distance between left and right transporting wheels, connected to a driving shaft at a rear end portion of the transmission case, can be reduced as necessary. With these arrangements, it is possible to reduce the overall width of the front-rotary working machine.

대표청구항 ▼

Front-rotary working machine employs a vertical engine having an output shaft projecting downward, and a transmission case, provided beneath the vertical engine, has a flat underside so as to extend generally parallel to the ground surface to be cultivated. Distance between left and right transporti

Front-rotary working machine employs a vertical engine having an output shaft projecting downward, and a transmission case, provided beneath the vertical engine, has a flat underside so as to extend generally parallel to the ground surface to be cultivated. Distance between left and right transporting wheels, connected to a driving shaft at a rear end portion of the transmission case, can be reduced as necessary. With these arrangements, it is possible to reduce the overall width of the front-rotary working machine. xtends from inside said cylinder cavity to outside said cylinder cavity.3. An engine according to claim 1, wherein, during normal engine operations, combustion occurs in said second compartment of one combustion chamber in the enclosed space between said diaphram member and said piston, such that, during combustion, said piston is driven away from said diaphram member and pushed towards the other chamber to compress said other chamber.4. An engine according to claim 3, further including means to drive each diaphram member towards said piston to remove exhaust from said cylinder subsequent to each combustion involving the chamber containing said diaphram member.5. An engine according to claim 4, wherein combustible gaseous fuel is introduced into said first compartment of a combustion chamber at the time when exhaust is being removed from said second compartment of said chamber.6. An engine according to claim 5, wherein combustible fuel is introduced into said first compartment through a valve aperture, said aperture forming a communication path between said first and second compartments when aligned with a specific part on said diaphram member, thereby allowing compressed gaseous fuel to be transferred from said first compartment into the adjacent second compartment.7. An engine according to claim 3, wherein combustion in one combustion chamber forces said piston and the diaphram member of another chamber to move towards the cylinder head of that other chamber to compress the gaseous fuel in said first compartment of that other chamber during normal engine operation.8. An engine according to claim 1, wherein said power transmission member extends from inside said cylinder cavity to outside said cylinder cavity, said cylinder being characterised in that when a combustion chamber is maximally compressed, the other combustion chamber is fully relaxed and vice versa, the length of the portion of said power transmission member outside said cylinder cavity being determined by the instantaneous position of said piston member.9. An internal combustion engine including at least one engine cylinder, said cylinder including a cylinder cavity with first and second cylinder heads which are interconnected by a cylinder wall, said cylinder further including a piston member which is slidably moveable within said cylinder cavity between first and second extreme positions which are intermediate said first and second cylinder heads, such that said piston member partitions said cavity into a first combustion chamber and a second combustion chamber which alternatively combust when said engine is in normal operation, said piston member being connected with a power transmission member extending from said piston member to outside said cylinder cavity, and a slidable diaphram member disposed in each said combustion chamber, said diaphram member including a spacer separating a cylinder head and the corresponding piston surface of a combustion chamber, thereby defining the minimum volume of said combustion chamber, said diaphram member including a base and a wall surrounding said base, said wall axially extending away from said base and said cylinder head adjacent said base such that the axial extension of said wall defines the minimum axial clearance of said combustion chamber containing said diaphram member. 10. An engine according to claim 9, wherein an aperture is formed on said wall surrounding said base, such that said aperture provides a communication path between the two sides of said diaphram member within said chamber when said diaphram member is moved to a specific, pre-determined position.11. An engine according to claim 10, wherein said pre-determined position corresponds to the position when said volume of said chamber is at a minimum.12. An internal combustion engine including at least one engine cylinder, said cylinder including a cylinder cavity with first and second cylinder heads which are interconnected by a cylinder wall, said cylin