Abstract: A bevel gear is generated using an annular milling cutter having a blade material made of a high-speed tool steel mounted to a main body, the blade material being coated with at least one layer of a film of a composition substantially comprising (Ti(1−x)Alx)(NyC(1−y)) (where, 0.2≦x≦0.85, 0.2≦y≦1.0), and dry cutting is performed at a cutting speed in the range from 20 to 400m/min without using a cutting oil. With this method, teeth can be generated at a greatly improved cutting speed without using any expensive tool such as cemented carbide, thereby realizing efficient production of a bevel gear at a reduced cost.

Abstract: A method for manufacturing a variable-diameter gear pair operable with a conjugate action therebetween includes the steps of providing a first workpiece and a second workpiece, each having a minor and a major diameter portion in spaced relation therefrom along a longitudinal axis. At least one gear tooth is formed within the first (second) workpiece for forming at least one first (second) gear body, wherein the at least one gear tooth within the first (second) at least one gear body curves outwardly in a radial and axial direction from the longitudinal axis, and wherein each of the at least one gear tooths includes a width dimension that changes in size between the minor and major diameter portions. Each of the first and second at least one gear bodies has the variable diameter and variable pitch for forming a gear pair operable with each other with a conjugate action therebetween.

Abstract: A method of gear design perfects design of gear teeth geometry (30) instead of limiting gear-tooth design to present cutter geometry and manufacturing methods. A pair of varied-diameter cutters (22, 29), such as hypoid cutters, have a geometric form that generates variable diameter toothed elements. Structures of hypoid or other varied-diameter cutters are achieved with a cutting tool (9) having a design cross-sectional shape of an idealized space between gear teeth on both of a pair of cutters. The cutter tool is rotated and reciprocated in shaping or machining relationship to other cutter blanks (18) or workpiece (10) in design rotation on cutter axes of a cutting-machine spindle (5). The cutter axes have variable heights above the cutter tool. Simultaneously with shaping or machine cutting either cutter blank, the angle of reciprocation and linear positioning of the cutter tool and height of center of the cutter axes are varied designedly.

Abstract: An apparatus and method for milling internal gears and splines using a pair of opposed milling cutters disposed internally in a gear or spline blank. The apparatus generally milling gear teeth on generally opposite sides of the blank with an indexing mechanism for manipulating the orientation of the milling apparatus with respect to the blank. Also disclosed are internal gears having milled teeth which are manufactured using the apparatus and the method.

Abstract: A method for producing a fillet on a gear as a function of a plurality of design criteria points in disclosed. The present method includes the steps of fitting a polynomial curve to the design criteria points, and producing the fillet on the gear, the fillet having a curved shape corresponding to the fitted polynomial curve. As a further step for control of the fillet, the actual shape of the fillet produced can be inspected and compared to the fitted curve, using a coordinate measuring machine or other suitable device. According to a further aspect of the invention, the fillet is produced using a tool having a curved surface corresponding to the polynomial curve.

Abstract: A gear shaper effects a gear shaper cutting method by dry cutting, using a pinion cutter made of high-speed tool steel at a high efficiency. The pinion cutter of the gear shaper is coated, at least on the flank thereof, with at least one layer of film having a composition comprising: (Ti.sub.(1-x) Al.sub.x)(N.sub.y C.sub.(1-y) ), wherein 0.2.ltoreq.x.ltoreq.0.9 and 0.2.ltoreq.y.ltoreq.1.0. Gear shaper cutting is performed at a cutting speed of 300 m/min or less.

Abstract: In order to miniaturize a speed change gear assembly, the respective gears are arranged in the order of the first gear A.sub.1, the second gear A.sub.2, the fourth gear A.sub.4 and the third gear A.sub.3 in an axial direction (X-axis direction). A center of the common spherical surface passing through each pitch circle of the first and second gears is made in accordance with the center of the common spherical surface passing through each pitch circle of the fourth and third gears. The center is used as the origin O. An XY coordinate is provided on the origin O. An axis line of an input shaft is arranged on the X-axis of the XY coordinate. An engagement point between the first and second gears A.sub.1 and A.sub.2 and an engagement point of the fourth and third gears A.sub.3 and A.sub.4 are arranged in the same quadrant of the XY coordinate. The first to fourth gears are arranged on the same axial direction surface of a rotary member 3.

Abstract: The profiling tool (10) has a segment (12) of a worm thread. Its active zone (13) is coated with grains of hard material (16) and is crowned in cylinder sections coaxial to the tool axis (26). During profiling, the grinding spindle (2) and the tool (10) rotate synchronously. By appropriate correction of the coupling ratio by means of a CNC control when moving the tool (10) in axial direction of the grinding worm (2), the grinding worm flank (1) can be dressed with any desired topology. The method makes it possible to profile topologically modified grinding worms (2) at the grinding worm (2) rotational speed used for grinding, which was previously not possible.

Abstract: A sprocket trimming method for a multi-stage sprocket assembly is disclosed which includes the steps of: (1) aligning the two sprockets at a gear shift position where a chain is escaping from one sprocket and engaging with another sprocket and is being tilted at a tilting angle; (2) using a computer aided design simulation to simulate how the gear shift operation is taking place and thus identify the portion of the sprocket tooth that will be overlapped and/or interfered with the chain when the chain is moved from an escaping sprocket tooth to an engaging sprocket tooth; and (3) trimming the overlapping and interference portion of the sprocket teeth to a depth according to the following equation: ##EQU1## wherein: D is the depth of the overlapping and interference portion of the sprocket teeth to be trimmed, w is the pitch width of the chain, Lc is the pitch length of the chain, .theta.

Abstract: A method of machining one or more tooth slots in a bevel gear-shaped workpiece with a cup-shaped tool having one or more stock removing surfaces. The method comprises indexing the workpiece by rotation about a workpiece axis to bring one of the tooth slots to a final machining position. Simultaneously with at least a portion of the indexing, positioning the tool to contact the workpiece to commence machining the slot and infeeding the tool during the indexing while moving the tool with the indexing workpiece to maintain the tool positioned in the slot. The infeeding, movement of the tool, and indexing continuing at least until the final machining position is achieved.

Abstract: Method of producing a conical or cup-shaped crown wheel which can mesh with a cylindrical pinion with the inclusion of an angle .alpha.. The crown wheel is produced by means of a generating process. The tool (1, 43) consists of a disc (3) which has machining elements (53) disposed on its circumference whose cutting edges lie in the surface of a profile which extends in the form of helical ribs (4) at a pitch angle .gamma. around the circumference of the disc (3), said profile in each cross-sectional plane perpendicular to the helical direction of the ribs (4) being the shape of a number of adjacent cuttting teeth (53), based on the basic geometry of a cylindrical pinion which is characteristic of the crown wheel and the center point of which lies on a circle which is in a plane perpendicular to the rotation shaft of the tool, and has a center point lying on the rotation shaft of the tool.

Abstract: A method for machining of tooth flanks by grinding or milling respectively as to internally or externally toothed workpieces with a profile disk tool in a discontinuous indexing process. For generating flanks with complicated flank modifications it is proposed to perform during machining besides the known movements an additional movement that is composed of at least two portions, extending in different axes of the machine, whereby the individual portions are so matched that a prescribed distortion of the flanks results. There are embodiments for single flank processes and for double flank processes. It is also possible to generate topological flank modifications and flanks, of which certain parts are set back relative to the unmodified area of the flank. Basis for determining the tool- and workpiece setting data and the movements that the tool has to perform relative to the workpiece, is a simulation of the machining process on a computer.

Abstract: In the production of a crown wheel which can mesh with a cylindrical pinion if the axes of rotation of the crown wheel and the pinion are not parallel, the workpiece from which the crown wheel is produced and a generating tool rotate at a ratio in the speed of rotation which corresponds to the proportion of the number of passes of the tool and the number of teeth of the crown wheel to be produced, and the tool is brought into engagement with the workpiece and is moved in such a way along the workpiece in a direction parallel to the axis of rotation of the cylindrical pinion that the tool works the tooth flanks of the crown wheel to be produced. When the center point of the tool is moved in a direction parallel to the axis of rotation of the cylindrical pinion which can mesh with the workpiece, and the teeth of which form an angle .beta.

Abstract: A base member such as an elevation pipe of a photographic tripod is severed and rack teeth are formed thereon in a single operation while the base member remains clamped in a V-block. The first rack tooth on each side of the location where the base member is severed includes half of a trough portion between adjacent rack teeth. Additional trough portions forming the remainder of the teeth are formed, either in the same severing and shaping operation, or in a later shaping operation. The formation of the inner half trough portions ensures that, when the two severed ends of the base member are brought together, a smooth transition will exist between the two rack portions. In addition, since the two severed ends always include half troughs immediately adjacent thereto, weaknesses and chipping resulting from the presence of partial rack teeth in these locations is avoided.

Abstract: In forming a helical gear by grinding with a grindstone, the modification accuracy of crowing etc. is improved in such a way that the inequality .beta.>.gamma. c is established wherein .beta. is the helix angle of the helical gear to be ground and .gamma. c is the inclination angle of the grindstone, and the profile of the grindstone is designed to have a vertical angle which is equal to the inclination angle (.gamma. c)of the grindstone.

Abstract: A method and apparatus for making a globoid screw for use as a mainrotor in a compressor or expander wherein a cylindrical rotor body is mounted for rotation about the longitudinal axis thereof, a cutter having a plurality of teeth at spaced locations around a circumference disposed in a plane and having an axis of rotation disposed perpendicular to that plane is mounted for rotation about its axis and is disposed so that the plane thereof is parallel to the rotor body longitudinal axis and so that the cutter rotational axis is perpendicular to the rotor longitudinal axis, and the rotor body and the cutter are rotated at synchronized speeds.

Abstract: A method for the manufacture of gears, in which a gear adapted for meshing with a toothed pinion is formed by means of a disc tool having a cutting edge exactly the same as the contour of the teeth of the pinion; the tool being positioned so that its cutting edge would be coincident, if the gear were meshed with the pinion, with the contour of the teeth of the pinion itself, and is pivoted about an axis perpendicular to its own axis of rotating; about the pivot axis, the gear is moved translationally along a line of action perpendicular to the axis of rotation of the disc tool itself and is rotated about its own axis perpendicular to the line of action; the ratio of the speeds of rotation of the gear about its axis and the speed of pivoting of the disc tool about is axis being variable in dependence on the position of the zone of contact of the disc with the gear.

Abstract: A wobblestick and a method for forming teeth on a wobblestick wherein the minimum distance between the axis of the hob and the axis of the wobblestick remain substantially uniform throughout the forming of the teeth so as to form the teeth while producing a wobblestick having a uniform diameter throughout the length of the wobblestick.

Abstract: Disclosed is a method for machining a component using a CNC or an NC machine. The method includes the steps of mounting the component at a location on the machine and providing a pair of datum points, e.g., "locating holes" or dowels, on the component. A first base line is defined to extend through the datum points and a second base line is defined to intersect the first base line at an intersection. While retaining the component at its mounting location, such component is machined using dimensions measured from the base line intersection. The new method avoids the inaccuracies, e.g., tolerances and tolerance "buildup," that often results from the use of jigs, fixtures and the like. In other words, the component itself becomes the reference for machining. The method is particularly useful in making parts such as detachable, unevenly-wearing gear segments which can be turned end-for-end for greatly improved service life.

Abstract: At the gear manufacturing machine there are automatically fabricated longitudinally curved tooth gears, especially longitudinally curved tooth bevel and hypoid gears according to conventional stock-removal form or generating methods. In order to improve both the mechanical stability and kinematic stability, the gear manufacturing machine contains only so-to-speak "natural" gear manufacturing or cutting axes, and, in particular, does not contain any hypoid stock, however, a generating drum. With the method of operating such gear manufacturing machine it is possible to fabricate hypoid gears during the generating operation by performing an additional movement of the workpiece in the lengthwise direction of the tooth pitch cone.

Abstract: Disclosed herein is a process and apparatus for grinding tooth surfaces of spur and helical gears by a generating method. The outer tooth surfaces of a theoretical ring gear are conjugate to the grinding surfaces along the width of a generally hourglass shaped grinding wheel. The grinding wheel is rotated which in turn causes the theoretical ring gear to rotate. A work gear is rotated in mesh with the internal tooth surfaces of the theoretical ring gear and simultaneously is traveresed in mesh across the width of the grinding wheel with the center of the work gear moving in a path about the center of the theoretical ring gear.

Abstract: A method for, via skiving, finishing the flanks of the teeth of a cylinder wheel that is provided with internal or external spur or helical gearing is generated. The right and left flanks of the teeth are provided in separate operations and, to produce helix modifications, the center distance, and/or the additional rotation, of the workpiece relative to the tool are altered over the face width of the gear. During axial movement, one or at the same time several of the setting parameters center distance, offset of the tool, swivel angle, and additional rotation are automatically altered in such a way that the distortion of the flanks that would be generated at conventional skiving of crowned gears is compensated for and a tool is used for the finishing that at the right and left flanks has a cutting edge geometry that conforms to the effect on profile of the mean setting parameters that are effective during material removal by the respective cutting edge.

Abstract: A method for determination of longitudinal and profile modification of tool gear tooth (I) which linearly meshes with a gear to be machined, wherein modification parameters are determined from the following relationship: ##EQU1## where: .delta.--the amount of modification of the tool gear tooth (I) in a direction perpendicular to a radius r identifying the location of a contact point on a machining surface (5) relative to a centre (O) of rotation of the tool gear;p--the requisite change in the normal component of the cutting force;G--the rigidity of an arrangement providing for synchronous rotation of the gear blank and the tool gear as reduced to the tool gear axis.

Abstract: A method and apparatus for making a globoid screw for use as a mainrotor in a compressor or expander wherein a cylindrical rotor body is mounted for rotation about the longitudinal axis thereof, a cutter having a pluality of teeth at spaced locations around a circumference disposed in a plane and having an axis of rotation disposed perpendicular to that plane is mounted for rotation about its axis and is disposed so that the plane thereof is parallel to the rotor body longitudinal axis and so that the cutter rotational axis is perpendicular to the rotor longitudinal axis, and the rotor body and the cutter are rotated at synchronized speeds.

Abstract: A method and apparatus for finishing bevel gears has a pair of bevel gears which are rotatably engaged in a meshing fashion while being imparted with a brake force therebetween and one of the bevel gears is rocked against the other along a tooth profile direction extending between a tooth top and tooth root of a gear tooth in a manner such that the rocking bevel gear swingably rocks around its pitch apex of the base pitch cone thereof. Further, the bevel gears finish contacting gear tooth surfaces of at least one of the bevel gears both by rotational contact and by sliding contact by rocking motion.

Abstract: A computer controlled machine for forming longitudinally curved tooth bevel and hypoid gears having a minimum number of movable machine axes for setup and operation. The movable axes include three rectilinear axes (X, Y, and Z) and three rotational axes (T, W and P). The rectilinear axes are arranged in mutually orthogonal directions. Two of the rotational axes (T and W) provide for rotating tool (26, 27) and work gear (42, 43), respectively. The third rotational axis (P) provides for adjusting the relative angular orientations of tool axis (T) and work axis (W). Pivot axis (P) is positioned with respect to both tool axis (T) and work axis (W) at fixed inclination angles. A method of opeating the computer controlled machine provides for controlling the movable axis (X, Y, Z, T, W, and P) in response to setup and operating parameters of conventional bevel and hypoid gear generating machines.

Abstract: A gear hub for flexible gear couplings wherein the teeth of said hub are cut while the hub is being moved constantly through all of the positions that the hub would assume relative to the sleeve during operation with the hub shaft misaligned with the sleeve at the maximum angle of misalignment for which the coupling is designed.

Abstract: A process for the making and/or finishing of a crown wheel using a metal-cutting tool, the crown wheel being intended for meshing with a predetermined cylindrical gear. The metal-cutting tool is a rotary disc-type element whose working transverse section lying in the plane of the axis of rotation corresponds essentially to the tooth profile of the cylindrical gear. The disc-type element is placed in such a way relative to the crown wheel to be made that the tooth profile of the element coincides with the tooth profile of the cylindrical gear when it is engaged with the crown wheel. The disc-type element is put into a to and fro linear motion perpendicular to its axis of rotation and is at the same time tilted about an axis which coincides with the axis of rotation of the cylindrical gear when it is engaged with the crown wheel. The tooth profile of the element meshes with the crown wheel to be made and finishes the tooth flanks according to the generating principle.

Abstract: A process for the discontinuous profile grinding or milling of gear wheels with wheel-type or shank-type tools which includes setting approximate parameters for the workpiece to be worked by the tool so as to avoid large profile deviations, determining by calculation or trial the profile of the workpiece following work thereon, comparing the work profile with the predetermined profile of the finished workpiece, and resetting the parameters as necessary to correspond the actual work profile with the required profile for the workpiece.

Abstract: An improved method is provided for finish machining forged and/or rough-cut teeth (8) of a ring gear (40) by which a rotary tool such as a rotary carbide milling tool (24) is rotated about a rotational axis "r" that projectionally intersects a bottom surface (12) of tooth (8) as it tracks along a predetermined tool path enabling the rotary tool to be in close proximity to sidewalls (14 and 14') of teeth (8) and thereby eliminating the practice of having to normalize the ring gear microstructure prior to machining teeth (8).

Abstract: A method of manufacturing hubs for flexible gear couplings is disclosed wherein the teeth of said hub are cut while the hub is being moved constantly through the position that the hub would assume relative to the sleeve during operation with the hub shaft misaligned with the sleeve at the maximum angle of misalignment for which the coupling is designed.

Abstract: In the present invention, a two-stage integral epitrochoidal cyclic rotor is produced by a machining method which produces the desired tolerences in both stages of the rotor without removing the work-piece from the support that holds it throughout the manufacturing process. In the manufacturing process, the blank starting work-piece, which is preferably a circular disc, is secured to a support element, for example by a magnetic chuck. The overall outer surface of the work-piece is then rotated and orbited while it is accurately machined to produce the epitrochoidal contour of the first stage of the rotor. Then, without releasing the work-piece from the holding surface, a second accurate machining operation, again with rotation and orbiting, is carried out on the upper half of the work-piece to form the epitrochoidal contour of the second stage of the rotor.

Abstract: This method is for finish machining the teeth of rough machined bevel gears having longitudinally curved teeth where finish machining is undertaken subsequent to case hardening. To permit economical fabrication of such bevel gears at least in mass production, the bevel gears are ground as workpieces by a tool designed as a hypoid gear and provided with at least one abrading surface on tooth flanks of its toothing. The workpiece and the tool are brought into mesh and positively and synchronously rotarily driven in the ratio of their respective tooth numbers. Displacement of the tool axis relative to the workpiece axis as well as speeds of the tool and the workpiece are selected such that a relative sliding velocity arising between the tool and the workpiece lies within the range of conventional surface speeds for grinding. All concave tooth flanks of the workpiece or all convex tooth flanks of the workpiece or both are continuously ground in a single operation with a feed motion.

Abstract: Formations on a workpiece (1) are machined along an arcuate path (5) having a center (4) in eccentrically spaced relation to a rotational axis (3) about which the workpiece is indexed by a holder (2). A tool (7) is controllably displaced through its carrier (12) in such a manner as to establish radial alignment of the tool relative to the indexing axis and the path center during operational strokes to enable machining of identical formations spaced along the path. The radius of curvature of the path is greater than the maximum distance (4-14) to which said operational strokes are limited.

Abstract: For machining the tooth flanks of a hardened workpiece having pre-formed teeth two cutting blades or plates are secured to a cutting blade or plate holder. The cutting blades or plates are provided with a base member or backing formed of a hard metal and a cover layer sintered thereon which is formed of cubic boron nitride. Each cutting blade forms a cutting surface and a clearance surface. Each individual cutting blade or plate is arranged at the cutting blade or plate holder in relation to the direction of the intended cutting movement such that the surface of the cover layer forms the clearance surface and an end face or surface of the cover layer is located in the cutting surface. Consequently, there is achieved the result that the cutting surface can be reground in the same manner as tools which, for example, are made of hardened steel and which are not provided with a cover layer.

Abstract: There is disclosed a gear cutting method for cutting a work by a milling cutter of a gear cutting planar having a cutting blade formed in a shape similar to involute curve. It comprises setting the work on a table intermittently rotating on a bed of a main body of the gear cutting planar, measuring and obtaining a heat expanding amount of the work in advance, compensating the feeding amount and the processing pitch of the milling cutter according to expanded dimension of the work at the time when the work is expanded by cutting heat, and cutting the work from a lower part to an upper part thereof by the milling cutter.

Abstract: A method for manufacturing precision gate-rotors and gate-rotor supports a single-screw mechanism by cutting the complex tooth profiles in a cylindrical gate-rotor blank. The cylindrical blank is rotated about its center axis as a cutting tool is translated in a fixed two-axis plane, one axis being the centerline of the cylindrical blank and the second axis being a line extending radially therefrom. This process may be carried out by a multi-axis, numerically controlled milling machine.

Abstract: An apparatus for manufacturing or machining externally toothed gears using a hyperboloidally or similarly formed, internally or externally toothed tool with abrasive tooth flanks. The tool and workpiece roll on one another about respective axes which cross at a distance. The tool has a sufficient axial dimension so that it is in engagement with the workpiece teeth from one side surface to the other of the workpiece. The workpiece and tool are coupled with guide wheel pairs. Each guide wheel pair runs with potential for backlash, but the overall gearing is such that no such backlash can occur.

Abstract: A method of manufacturing bevel and hypoid gear pairs according to an imaginary mating gear cutting process. The tooth spaces are cut by means of a face-mill cutter head rotating about an axis of rotation. In order to overcome heretofore prevailing limitations on the gear diameter, cone angle and shaft angle of gear pairs, either the gear or the cutter head performs an arcuate generating movement about a generating axis in order to produce one of the gears, whereby a machining axis is adjusted relative to the generating axis in accordance with the position of the axes of both gears of the gear pair. In one advantageous embodiment, the same machining axis adjustment is also employed for fabricating the mating, non-generated gear.

Abstract: An involute external tooth profile is cut into the periphery of a gear blank by positioning a rotating milling cutter with its cutting path perpendicular to the plane of action of the desired base surface of revolution within the gear blank so as to penetrate the plane of action from the side thereof opposite to the base surface and with a predetermined line of intersection which generates the involute profile as the base surface rolls upon the plane of action. The rolling action causes the generating line to traverse the blank between its addendum surface and a depth sufficient to provide the desired length of active profile.

Abstract: A method of manufacturing large gears by performing all steps required on a single vertical boring mill without removing the gear blank from the rotary table of the mill.

Abstract: Apparatus for milling a gear for a double enveloping worm gear drive. A rotating milling cutter is advanced toward a workpiece spindle to mill a flank of a gear tooth by tilting the milling cutter supporting frame about an axis that passes through the axis of rotation of the workpiece spindle to form a predetermined change in the helix angle from the top to the root of the tooth. The initial tilt setting of the cutter is adjusted to suit the root helix angle.

Abstract: This invention pertains to a rack and pinion type steering gear for an automobile and a method for cutting rack teeth in the gear. The gear comprises a housing, a pinion rotatably supported within the housing and operatively connected to a steering wheel and a rack bar supported within the housing for slidable movement in the axial direction and rotation and provided with rack teeth in engagement with the pinion. The rack teeth are formed on the rack and along a varying pitch line so that the axial movement amount of the rack varies as the pinion rotates.

Abstract: A sliding member having two gripping devices removes a finished workpiece from a machine and at the same time introduces a blank workpiece. The sliding member carries out a rectilinear feed and return movement, for which it is hydraulically driven. All movements of the two gripping device systems are controlled by cams, including (1) opening and closing the finished part gripping device when picking up the finished part, (2) swivelling the finished part gripping device approximately 90.degree., (3) opening and closing the blank gripping device as the sliding member is returned, (4) again erecting the finished part gripping device when outside of the machine, and (5) stabilizing the blank and finished part gripping devices during movement of the sliding member.

Abstract: A double helical gear set having a pair of driving pinions meshed with a pair of driven gears, respectively, is aligned by providing accurately aligned integral or demountable pinions on one shaft and aligning the driven gears using a fixture which is operable to locate a keyway or other aligning device on each of the driven gears so that the driven gears can be timed or aligned on their support shaft. The fixture has a hub member which fits in the bore of the gear hub and includes a locating pin engageable with opposed flanks of adjacent teeth at corresponding points on the tooth profile such as the pitch point. The fixture includes interchangeable locating pin support members for use in aligning helical gears having different diametral pitches and helix angles.

Abstract: A rotary indexing table having a generally circular top plate rotatably secured to a fixed base structure is disclosed. An outer race annular ring is connected to the top of the fixed base structure and extends radially over a central bore formed in the top face of the fixed based structure. A first ring of teeth is formed on the circular top plate. A second ring of teeth is formed on the outer race annular ring. Both the first and second rings of teeth face toward the central bore in the fixed base structure. A piston is slidably mounted in the central bore. The piston has a third ring of teeth aligned with the first ring of teeth and a fourth ring of teeth aligned with the second ring of teeth. A method of forming the third and fourth rings of teeth on the piston is also disclosed. The method includes mounting a sine block on a work table. Then fastening a rotary indexing table on the top of the sine block. Next, securing the piston to the top of the rotary indexing table.

Abstract: A method and apparatus for generating a shape on the periphery of a non-rotating workpiece by orbiting a rotating shaping cutter in cutting engagement with the workpiece while reciprocating the cutter along its own axis.

Abstract: The present invention relates to a bevolute gearing system which transmits torque between non-intersecting shafts at right angles to each other. The bevolute gear system includes a pinion gear which is flat and in one plane. The pinion gear is designed to include teeth which are shaped in the form of an involute spiral. The bevolute gear system includes a second gear which is also designed to include teeth which are shaped in the form of an involute spiral. The second gear is mounted on a non-intersecting axis at a right angle to the axis of the pinion gear. The bevolute gearing system of the present invention reduces the thrust loads to negligible values for the bearings of both the pinion gear and the second gear. In addition,. higher mechanical efficiencies, wider tolerances on alignment of the gears, interchangeability between the gear and the pinions to produce different ratios and a substantially eliminated gear noise are a few of the many advantages disclosed in the present invention.