| 摘要 |
The invention refers to a riding lawn mower (10) comprising: a) an engine (14); b) a drive axle (24), said drive axle providing locomotion for the riding lawn mower (10); c) a drive system (26,27,28), said drive system selectively transferring power from said engine (14) to said drive axle (24); and, d) a vacuum actuated control mechanism (42) for controlling the speed of the riding lawn mower, said vacuum actuated control mechanism including: (1) a first vacuum actuator (50); (2) first connecting means (70) for operatively connecting said first vacuum actuator (50) to said drive system (26,27,28); (3) vacuum means (90) for providing a vacuum to said first vacuum actuator (50); (4) activating means (100) for selectively activating said first vacuum actuator (50); and, (5) securing means (120) for securing said first vacuum actuator (50) in place, said securing means also for securing a constant speed for said drive axle (24), wherein said first vacuum actuator (50) has first and second chambers (155,156) separated by a movable membrane (154), said activating means including: (1) first and second switching means (110,111) for selectively permitting airflow between said first and second chambers (155,156) and said vacuum means (90); (2) a rocking switch (102) for selectively activating said first and second switching means; and, (3) vacuum lines (91) for communicating said vacuum means (90) to said first and second switching (110,111) means and for communicating said first and second switching means to said first and second chambers (155,156) respectively; said securing means (120) including (1) third and fourth switching means (121,122) for selectively permitting airflow between said first and second chambers (155,156) and said first and second switching means (110,111) respectively, said rocking switch (102) selectively activating said third and fourth switching means. <IMAGE> |
