Built-up mainshaft for multi-unit rotary mechanisms and method of manufacture thereof

Claim 1

A built-up mainshaft for a multi-unit rotary mechanism comprising: a. an elongated shaft element of substantially uniform outside dimensions for substantially the entire length thereof; b. a plurality of eccentric elements; c. each eccentric element comprises: c-1. a relatively rigid, generally cylindrical body portion for supporting a rotor; c-2. a sleeve-like portion integral with the cylindrical body portion and extending with its axis parallel and radially offset from the axis of the cylindrical body portion; c-3. a bore extending through the sleeve-like portion and cylindrical body portion and of a cross-sectional size and shape to receive therethrough said shaft element; c-4. a slot in said cylindrical body portion and in the sleeve-like portion extending in a plane containing the longitudinal axis of said bore the full length of the cylindrical body portion and into the sleeve-like portion and radially to a point short of the outer periphery of the cylindrical portion; c-5. scoring means in said sleeve-like portion adjacent the cylindrical body portion and extending in a plane normal to the plane containing the longitudinal axis of the bore and communicating with said slot; and d. a clamping means for each eccentric element coacting with the said slot and scoring means to effect deformation of the cylindrical body portion and thereby cause the cylindrical body portion to embrace said shaft element in torque transmitting relationship.

Claim 6

The method of constructing a built-up mainshaft for supporting a plurality of rotors in adjacent housing cavities for planetary rotary movement, the mainshaft having an elongated shaft element of substantially uniform outside dimensions throughout substantially the entire length and a plurality of eccentric elements telescopically received on the shaft element; the method steps comprises: a. providing each of the eccentric elements with a generally cylindrical, relatively rigid, body portion and an integral sleeve-like portion having an axis extending radially offset from and parallel to the axis of the cylindrical body portion; b. making a first slot in each of the eccentric elements to extend the full length of the cylindrical body portion and sleeve-like portion and radially to a point short of the outer periphery of the cylindrical body portion and forming a second slot in the sleeve-like portion to extend transversely of the axis of said shaft element and intersecting the first slot to thereby render the eccentric element deformable in an inward direction; c. angularly positioning each eccentric element on the shaft element and clamping it to the shaft element by deformation of the cylindrical body portion so that the eccentric element is attached to the shaft element in torque transmitting relationship; and d. machining the outer peripheral surface of each cylindrical body portion of each eccentric element to insure concentricity of the outer peripheral surface.

Claim 7

The method of constructing a built-up mainshaft for supporting a plurality of rotors in adjacent housing cavities for planetary rotary movement, the mainshaft having an elongated shaft element of substantially uniform outside dimensions throughout substantially the entire length and a plurality of eccentric elements telescopically received on the shaft element; the method steps comprises: a. providing each of the eccentric elements with a generally cylindrical, relatively rigid, body portion and an integral sleeve-like portion having an axis extending radially offset from and parallel to the axis of the cylindrical body portion; b. making a first slot in each of the eccentric elements to extend the full length of the cylindrical body portion and sleeve-like portion and radially to a point short of the outer periphery of the cylindrical body portion and forming a second slot in the sleeve-like portion to extend transversely of the axis of said shaft element and intersecting the first slot to thereby render the eccentric element deformable in an inward direction; c. angularly positioning each eccentric element on the shaft element and clamping it to the shaft element by deformation of the cylindrical body portion so that the eccentric element is attached to the shaft element in torque transmitting relationship; and d. machining the outer peripheral surface of each cylindrical body portion of each eccentric element to insure concentricity of the outer peripheral surface.