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US 2002/0152886 A1Published application
Rotary pivot unit
OwnerEdwin G. Sawdoninventor
Life of this patent
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Abstract
A positioning apparatus includes a housing having a chamber. The vane is rotatably movable within the chamber. An arm is coupled to the vane.
Claims25
A positioning apparatus comprising:
- a housing having a chamber;
- a vane rotatably movable within said chamber;
- an arm coupled to said vane;
- and
- a workpiece coupled to said arm, wherein said arm and said workpiece rotate in response to rotation of said vane.
2 more elements
A positioning apparatus comprising:
- a rotary actuator;
- and
- an arm drivingly coupled to said rotary actuator, wherein said arm at least partially surrounds said rotary actuator.
A positioning apparatus comprising:
- a rotary fluid actuator having a plurality of pin apertures extending therethrough;
- an arm drivingly engaged with said rotary actuator;
- and
- a pin selectively disposed within one of said pin apertures to define a range of rotary travel of said arm by the presence of said pin in one of said pin apertures.
1 more element
A method of operating a rotary pivot unit having a rotary fluid actuator, an arm and a pin, the method comprising:
- (a) inserting the pin in one of a plurality of apertures extending through the actuator, the aperture positions corresponding to a desired range of rotational travel;
- (b) supplying fluid to the rotary actuator;
- (c) rotating a portion of the actuator by direct contact with the fluid;
- (d) rotating the arm in response to movement of the portion of the actuator;
- and
- (e) limiting the rotation of the arm by engaging the arm with the pin.
3 more elements
Dependencies are inferred from the claim text.