Machine element or mechanism – Power take-off – From shaft extension
Patent
1992-03-02
1993-10-05
Lorence, Richard M.
Machine element or mechanism
Power take-off
From shaft extension
74 8915, B60K 1728
Patent
active
052494748
ABSTRACT:
A power takeoff (PTO) assembly equipped with an electromechanical shifter for moving a pinion gear of the PTO assembly into and out of engagement with a drive gear of that assembly or of a vehicle transmission on which the assembly is mounted. The PTO assembly includes a telescoping shock shaft having a first shaft section axially advanced by a power-driven linear actuator and operatively connected to a second shaft section equipped with a fork for urging the pinion gear laterally into (and out of) engagement with the drive gear. Between the two shaft sections is a compression spring that stores energy by compressing until a condition of alignment between the pinion and drive gears occurs, at which time the stored energy of the spring releases and quickly shifts the pinion gear into meshing engagement with the drive gear. Also disclosed as part of the linear actuator is a load-limiting and time-delay circuit for protecting the system should intermeshing fail to occur within a predetermined interval and before a preselected load condition is exceeded.
REFERENCES:
patent: 1324592 (1919-12-01), Hicks
patent: 3198301 (1965-08-01), Randall
patent: 3277734 (1966-10-01), Bernard
patent: 4449416 (1984-05-01), Huitema
patent: 4498350 (1985-02-01), Ross
Arens Controls, Inc.
Lorence Richard M.
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