Combined linear and rotary actuator and floating ring gear

Details Combined linear and rotary actuator and floating ring gear Combined linear and rotary actuator and floating ring gear

1980-05-02

1983-10-18

Hershkovitz, Abraham

Expansible chamber devices

Rectilinearly moving working member and coaxial or parallel...

92147, F01B 300

Patent

active

044098880

ABSTRACT:
A ring gear of a helically splined rotary actuator is separately and independently joined to the outer cylindrical body of the actuator and meshes with the splined piston sleeve of the rotary actuator. The outer cylindrical body is a smooth, continuous body. In one form of the invention, the ring gear is secured to the outer cylindrical body with flush mountings so that the entire body can be slid past end seals of a hollow boom or further outermost cylindrical tube. In a preferred embodiment, the ring gear is loosely joined to the outer cylindrical body so that it can conform to irregularities or tolerance errors in the splines of the piston sleeve and can accommodate bending in the outer cylindrical body or the rotary output shaft due to heavy bending loads on the actuator. Another feature of the invention is a combined linear and helically splined rotary actuator which can provide both rotary and linear movement relative to an output shaft and an outer boom tube; and in the preferred embodiment of this feature of the invention, the ring gear for the helically splined rotary actuator is a separate, independently mounted ring gear with a flush mounting on the other surface of the outer cylindrical rotary actuator body so that the body can pass through the end seals of the outer boom tube.

REFERENCES:
patent: 3151533 (1964-10-01), Hartel
patent: 3329069 (1967-07-01), Feroy
patent: 3339463 (1967-09-01), Updegrave
patent: 3424065 (1969-01-01), Kurt
patent: 3457838 (1969-07-01), Rowe
patent: 3616728 (1971-11-01), Kennedy
patent: 3763747 (1973-10-01), Beichel
patent: 3842715 (1974-10-01), Maier
patent: 3973468 (1976-08-01), Russell, Jr.
patent: 4217793 (1980-08-01), Abe
patent: 4290344 (1981-09-01), Adams

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