Paper scoring and slitting machine Patent #: 3961547
ApplicationNo. 05/877689 filed on 02/13/1978
US Classes:74/89.38Including means to selectively transmit power (e.g., clutch, etc.)
ExaminersPrimary: Husar, C. J.
Assistant: Berman, Conrad L.
Attorney, Agent or Firm
International ClassesF16K 31/143 (20060101)
F16K 31/14 (20060101)
F16K 31/05 (20060101)
F16H 25/20 (20060101)
AbstractA manual override apparatus for use with normally, automatically, powered driving assemblies such as valve actuators, the override apparatus having a body with a bore therethrough, a housing secured to the body and having an axial bore which registers with the bore in the body, a rotatable split drive nut mounted in the housing, a drive screw extending into the registering bores in the body and the housing and mounted for axial movement therein, a camming system for selectively engaging and disengaging the drive nut with the drive screw whereby engagement of the drive screw with the drive nut and rotation of the drive nut causes axial movement of the drive screw, and a biasing assembly operatively connected to the split drive nut which exerts a biasing engagement force on the drive nut when a given magnitude of resistance to engagement is encountered.