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US 5,511,439 AGranted
Pushing mechansim
OwnerJose M. Las Navas Garciainventor
Life of this patent
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Abstract
A pushing mechanism has a hollow slotted tube which receives radially extending pins of a threaded shaft. The tube is rotated by the rotor of a motor and is threadably received within an axially and rotationally fixed nut that is connected to a housing which, in turn, is fixed to the motor housing. Rotation of the shaft through the pins causes the shaft to move axially. An outer threadless end of the shaft extends beyond the housing for pushing outside mechanisms such as the stage of a microscope, a micro hardness tester or even a hydraulic cylinder.
Claims15
A pushing mechanism comprising;
- a hollow tube having a pair of diametrically opposed axially extending slots;
- motor means connected to the tube for rotating the tube;
- a thrust shaft having a first end with a pair of pins which respectively extend into the pair of slots and are slidable along the pair of slots with relative axial movement between the shaft and the tube, the shaft having a threaded portion adjacent the first end and an opposite second end with a threadless portion;
- a nut for threadably receiving the threaded portion of the shaft;
- and
- a housing connected to the motor means for rotatably and axially fixing the nut, the nut being axially and rotatably fixed to the housing so that rotation of the tube causes axial movement of the shaft in the nut, the threadless portion having a length which extends at least partly beyond the housing for axial movement of the threadless portion beyond the housing.
3 more elements
Dependencies are inferred from the claim text.