Expansible chamber devices – With toothed gear – spline or thread rigid with working member
Reexamination Certificate
2007-09-11
2007-09-11
Lazo, Thomas E. (Department: 3745)
Expansible chamber devices
With toothed gear, spline or thread rigid with working member
C092S033000, C074S089250
Reexamination Certificate
active
11355596
ABSTRACT:
A manually and/or fluid-pressure operated rotary actuator is coupled with a power screw in a compact assembly to produce large linear thrust. The actuator is operated in both directions by fluid pressure or in one direction by fluid pressure and in the other by spring energy, or by fluid pressure alone or in combination with manually applied force. The actuator has a cylindrical housing, a cylindrical reaction member inside of the housing, a cylindrical piston partially covering the reaction member, a cylindrical rotor partially covering the piston, a device forcing rotation of the piston when moving axially with respect to the reaction member and/or rotor, a plunger engaged with the rotor and restrained from turning with respect to the housing, a base through which the plunger extends, a spring connected to the rotor and housing, a two port assembly, and a handle affixed to the reaction member for manual operation.
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