Patent ID: 6084370
Filing Date: 2000-07-04
Classification: F16K

Abstract:
A switching device for the manual drive of an electromotive actuator having an electric motor operatively connected to a fitting by a gear and with an axially fixed drive shaft and having a manual drive which comprises a handwheel shaft and a handwheel and which can be operatively connected to the fitting, wherein,a drive shaft stub of said axially fixed drive shaft is equipped with a radial coupling pin;said handwheel shaft is mounted axially displaceably and in alignment with said drive shaft;that end of said handwheel shaft which is located opposite said handwheel is equipped with a coupling sleeve displaceable axially counter to the force of a compression spring;that end of said coupling sleeve which faces said drive shaft has at least one groove, the entrance of which is widened on both sides by means of run-on slopes; andsaid manual drive has means for operating an electric switch which is arranged in a circuit of a drive motor, said electric switch closed when said manual drive is in a state and opened when said handwheel shaft is engaged.