Cams Patents (Class 74/567)
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Patent number: 4967617Abstract: A hollow shaft composed of individual tube portions and provided with cams and end pieces, the individual tube portions preferably being interconnected by plastic expansion of the inner elements and elastic expansion of the outer elements. It is also possible to achieve a connection by shrinking the outer elements onto the inner ones by soldering or welding. Sleeves interconnecting the drive elements are designed to be integral with them and form part of the hollow shaft so that considerable weight savings are achieved by avoiding doubled regions where parts are slid onto each other. The design is particularly suitable for connecting parts with distinctly different elastic properties such as steel tubes and malleable cast iron drive elements.Type: GrantFiled: January 10, 1989Date of Patent: November 6, 1990Assignee: Emitec Gesellschaft fur Emissionstechnologie mbHInventors: Wolfgang Maus, Helmut Swars
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Patent number: 4958531Abstract: A mechanism for transmitting rotational motion from one shaft to another includes a link which is constrained to move in an orbital path, an input shaft is connected to the link so that rotation of the input shaft will cause the link to move in its orbital path and a second shaft parallel to the input shaft is connected to the link so that orbital motion of the link will cause the second shaft to rotate. At least one of the shafts is connected to the link by a mounting which is capable of movement in the plane of the link, said mounting making frictional engagement with the link so that when a lateral stress above a predetermined value is applied between the shaft and link, the mounting will move laterally to relieve the stress, said predetermined value being above the lateral stresses experienced during normal operation of the mechanism.Type: GrantFiled: July 14, 1989Date of Patent: September 25, 1990Assignee: Jaguar Cars LimitedInventor: Bryan N. V. Parsons
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Patent number: 4949683Abstract: A camshaft comprises a hollow tubular shaft (1) and an inner member (10) which may be in the form of a tube. The inner member is inserted within the tubular shaft so that a lubricant guiding space is defined between the tubular shaft and the inner member. The lubricant guiding space is connectable via radial bores (8 and 9). The inner member (10) is in supporting contact with the tubular shaft (1) in portions (11, 12, 13, 19) thereof.Type: GrantFiled: February 2, 1989Date of Patent: August 21, 1990Assignee: Emitec Gesellschaft fur Emissionstechnologie mbHInventor: Helmut Swars
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Patent number: 4947547Abstract: A camshaft for controlling valves in internal combustion engines includes a shaft and at least one cam slid onto and connected to the shaft. The cam has a recess for receiving the shaft. The recess has at least one radially inwardly directed projection which engages a corresponding groove in the shaft. At least one portion of the area of the shaft in which the cam is to be provided has a diameter which is greater than the remaining areas of the shaft. The increased diameter portion of the shaft is a bead-like material displacement which extends circumferentially on the shaft and is manufactured by rolling. The cam is forced onto the increased diameter portion of the shaft with a projection in the recess of the cam forming in a chip-removing operation a groove in the increased diameter portion.Type: GrantFiled: November 22, 1989Date of Patent: August 14, 1990Assignee: Etablissement SupervisInventor: Lukas Matt
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Patent number: 4934204Abstract: A new compact linkage for translating rotary input force to amplified linear output force includes two force applying members which move apart relatively during operation of the linkage. A strut is pivotally attached at one end to each of the force applying members; the struts extend towards each other with a space between their free ends. Each strut has a bearing surface at its free end. A cam-roll member is interposed between the bearing surfaces of the struts and includes cam surfaces in contact with the bearing surfaces. When the cam-roll member is rotated by a lever attached thereto, it translates the rotary input force from the lever into linear output force by a rolling action of the cam-roll member against the bearing surfaces of the pivoted struts. The linkage is markedly more efficient in force translation and transmission than pivoting toggle linkages typical of the prior art.Type: GrantFiled: June 7, 1989Date of Patent: June 19, 1990Inventor: Edward L. Hadden, Sr.
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Patent number: 4926707Abstract: Actuator for locking device of doors and trunks of automobiles comprising a rotating member that is rotated by a power source; a cam groove formed in the rotating member; a cam follower that moves along the cam groove;anda displacement member which moves between a first position and a second position as a result of the movement of the cam follower. If the cam follower should stop in a communicating groove, the disk can be rotated by a small motor or the cam follower can be operated normally under circumstances when the motor fails.Type: GrantFiled: October 4, 1988Date of Patent: May 22, 1990Assignee: Mitsui Kinzoku Kogyo Kabushiki KaishaInventor: Shinjiro Yamada
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Patent number: 4927688Abstract: A cast-iron element with a non-iron interior area utilizes a molding core formed of a glass material, which may be tubular or solid and may, as desired, be entirely enclosed within the casting.Type: GrantFiled: January 27, 1989Date of Patent: May 22, 1990Assignee: Eisengiesserei Monforts GmbH & Co.Inventors: Rudi Hass, Georg Jansen, Wilhelm Kallen
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Patent number: 4922785Abstract: Camshaft assemblies are disclosed with methods for making them by the expansion of tubular shafts into prelocated cams, journals and other elements, if desired. Features of the camshafts include trilobe or polylobe element openings, preferably splined or serrated for low energy filling and high torque capacity and High Strength Low Alloy mild steel tubular shaft material.Type: GrantFiled: June 24, 1988Date of Patent: May 8, 1990Assignee: General Motors CorporationInventors: Philip D. Arnold, Roy G. Kaywood
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Patent number: 4906037Abstract: An externally accessible, clutching adjustable latching mechanism is provided having an adjusting assembly which permits the latching mechanism to be mounted over a greater range of depths than conventional adjusting mechanisms and controls the amount of pre-load which is possible by the adjustment feature, and protects the aircraft skin from being damaged during such adjustment. An internal clutching mechanism insures the accomplishment of proper, minimum preload on the structures connected by the latching mechanism. The adjusting assembly includes a two-part driver (14a, 14b) and a drive unit (15) which translates rotational movement of the driver into linear movement of a connecting element (10), allowing infinitely small, non-incremental adjustment of the position of the connecting element (10) relative to the structures joined by the mechanism.Type: GrantFiled: March 17, 1989Date of Patent: March 6, 1990Assignee: V.S.I. Corp.Inventors: John C. Stammreich, William Bourne, Jr., Raymond Harmon
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Patent number: 4905538Abstract: A camshaft of a valve operating system for an internal combustion engine, is formed of iron-based alloy casting and has cam sections, each of which is in slidable contact with a heat resistant tip of a rocker arm. The cam section is formed at its surface portion with a surface hardened layer formed of an air-cooled chilled structure. The surface hardened layer is formed by remelting a part of the surface of the casting after preheating. An intermediate hardened layer of a heat affected zone is formed in contact with the surface hardened layer and has a thickness ranging from 0.5 to 2.0 mm. The intermediate hardened layer is formed of a mixed structure of bainite transformation phase and troostite and is formed by being thermally affected during the remelting.Type: GrantFiled: January 24, 1989Date of Patent: March 6, 1990Assignee: Nissan Motor Co., Ltd.Inventors: Koji Watanabe, Makoto Kano, Shigeoki Sawada, Ryoji Makino
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Patent number: 4905800Abstract: An improved S-cam (100) for expanding internal shoe (20) drum brakes (10) is provided. The working surfaces (116) of the S-cam are provided at their ends with an extremely high rise/low mechanical advantage portion (122) providing a warning ramp to indicate to the operator that brake relining is required and to minimize the possibility of cam flip.Type: GrantFiled: September 5, 1986Date of Patent: March 6, 1990Assignee: Eaton CorporationInventor: George P. Mathews
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Patent number: 4903543Abstract: A camshaft for controlling valves in internal combustion engines includes a shaft and at least one cam slid onto and connected to the shaft. The cam has a recess for receiving the shaft. The recess has at least one radially inwardly directed projection which engages a corresponding groove in the shaft. At least one portion of the area of the shaft in which the cam is to be provided has a diameter which is greater than the remaining areas of the shaft. The increased diameter portion of the shaft is a bead-like material displacement which extends circumferentially on the shaft and is manufactured by rolling. The cam is forced onto the increased diameter portion of the shaft with a projection in the recess of the cam forming in a chip-removing operation a groove in the increased diameter portion.Type: GrantFiled: May 16, 1988Date of Patent: February 27, 1990Assignee: Etablissement SupervisInventor: Lukas Matt
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Patent number: 4901821Abstract: A motor operated mechanism for transferring energy to the energy storing mechanism of a circuit breaker of the type which utilizes the energy to close the primary contacts of the circuit breaker. The mechanism includes a motor for driving a cam and follower assembly. The cam and follower assembly cooperate with a linkage to supply rotational motion of an energy delivery shaft, wherein the energy delivery shaft is coupled to the energy storing mechanism of the circuit breaker.Type: GrantFiled: October 13, 1988Date of Patent: February 20, 1990Assignee: Siemens Energy & Automation, Inc.Inventor: W. Dale Robbins
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Patent number: 4899615Abstract: A cam member is formed with an axial bore slightly larger than the outer diameter of a cam shaft so as to enable easy insertion of the cam shaft therein when forming an assembly. A recess is provided between the axial bore and the cam shaft and a joinder piece is inserted in the recess with solder being retained in the joinder piece so that upon heating of the solder with the joinder piece located within the recess means, the cam member and the shaft member may be affixed together.Type: GrantFiled: December 28, 1988Date of Patent: February 13, 1990Assignee: Etablissement SupervisInventor: Lukas Matt
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Patent number: 4895045Abstract: A camshaft arrangement including a pair of cams (7, 8 ) mounted on the same camshaft (1) with at least one of the cams rotatable relative to the camshaft (17) and with the cams (7, 8) maintained at a given axial spacing on the camshaft (1), a differential mechanism (a, b, c, d) coupling the two cams (7, 8) together for rotation about the camshaft axis with a selected relative angular phase, and phase adjusting means (14, 15) for acting on the differential mechanism (a, b, c, d) to effect a relative rotation of the cams (7, 8) to adjust the selected angular phase of the cams (7, 8) and thereafter to retain the cams in the adjusted position.Type: GrantFiled: May 23, 1988Date of Patent: January 23, 1990Assignee: LONRHO PLCInventor: Frederick M. Stidworthy
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Patent number: 4882825Abstract: A method of securing a tubular member within an annular cam member for the manufacture of a cam shaft is provided, including the steps of forming a cam member from sintered materials with at least two axially extending grooves being provided in the inner surface of the cam member adjacent the portion of the cam member having the greatest thickness such that a radially projecting ridge is defined between adjacent grooves, fitting the tubular member into the cam member, supplying a working fluid to the interior of the tubular member and applying pressure to the fluid so as to expand the tubular member while maintaining substantially the same wall thickness within the cam member until the ridge bites into the outer surface of the expanding tubular member and becomes tightly engaged therewith. The pressure applied to expand the tubular member is less than that required to fully expand the tubular member along the inner surface of the cam member.Type: GrantFiled: October 28, 1987Date of Patent: November 28, 1989Assignee: Kokan Kako Co., Ltd.Inventor: Masanobu Nakamura
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Patent number: 4881680Abstract: A process for the production of composite camshafts comprises the selective positioning of a plurality of cam elements on a camshaft and orienting the cam elements at a desired location with respect to the central axis of the shaft and thereafter securing the cam elements in place on the shaft.Type: GrantFiled: May 6, 1988Date of Patent: November 21, 1989Assignee: Georg Fischer AGInventors: Peter Toelke, Walter Greulich
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Patent number: 4880477Abstract: An austempered ductile iron alloy with a mixed austenitic-bainitic structure is made by a method which enables the iron to withstand high cyclical stresses while having a high resistance to abrasion. Articles such as automobile roller-follower camshafts that are made from the iron alloy may have portions thereof selectively austempered to reduce the overall cost and time required to manufacture the article.Type: GrantFiled: June 14, 1988Date of Patent: November 14, 1989Assignee: Textron, Inc.Inventors: William J. Hayes, Harry A. Matrone, Philip D. Johnson
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Patent number: 4876916Abstract: An elongated generally cylindrical iron shaft is cast as a single piece. The shaft has a longitudinal axis and has a centrally disposed longitudinal hollow channel extending completely therethrough along the axis. The shaft has a plurality of transverse channels extending outwardly from the longitudinal channel completely through the shaft to the outside thereof and communicating with the longitudinal channel. Each transverse channel has the shape of a nozzle. The outside openings of the transverse channels are spaced apart and are disposed along a helical path on the outer surface of the shaft. The helix has an axis coincident with the longitudinal axis.Type: GrantFiled: December 9, 1987Date of Patent: October 31, 1989Assignee: Von Roll, AGInventor: Konrad Maier
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Patent number: 4876794Abstract: This invention relates to radial cams and tools utilizing radial cams. The radial cam includes a flat plate having at least a first flat surface and a spiral groove therein having a spiral track formed of a plurality of tracks having progressively smaller radii and including an outermost track, innermost track and intermediate tracks therebetween. A return slot connects the innermost track to the outermost track whereby a continuous groove is formed. A device utilizing this cam includes a base, the above described cam pivotally mounted to the base, a cam follower slidably received in the continuous groove and a at least one lever arm pivotally attached to the cam follower and the base.Type: GrantFiled: July 13, 1988Date of Patent: October 31, 1989Assignee: Radia-Cam Inc.Inventor: Herman A. Myers
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Patent number: 4875270Abstract: A method and apparatus for securing one or more parts, each of which is provided with an opening, to a hollow member. In the starting state, the inner diameter of the opening of the parts is greater than the outer diameter of the surface provided on the hollow member for securing the part. The parts are placed in the prescribed position on the hollow member prior to the securing operation. In order in a simple and economical manner to reliably secure the parts to the hollow member without the danger of overstressing the latter, and without the danger that the parts will loosen, a temperature difference is produced, prior to placing the parts on the hollow member, by heating the parts and/or by cooling the hollow member. Subsequently, each part is secured to the hollow member by widening the latter at least in the securing regions thereof, and by a subsequent shrink fitting of the parts onto the hollow member as a consequence of the temperature equalization that occurs.Type: GrantFiled: March 15, 1989Date of Patent: October 24, 1989Assignee: Balcke-Durr AktiengesellschaftInventors: Herbert Krips, Miroslan Podhorsky
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Patent number: 4867004Abstract: A cylindrical sensor for the sectional expansion of hollow shafts by exerting fluid pressure includes a sensor body to be disposed in a hollow shaft. The sensor body has an end and includes a sensor surface having sections corresponding to sections of the hollow shaft to be expanded. The sensor body has an outer hollow cylinder with substantially radial bores formed therein. The bores discharge partly in the sections of the sensor surface and the bores have inner ends. The sensor body has an inner cylinder onto which the outer hollow cylinder is forced. The outer hollow cylinder has an inner cylindrical surface and the inner cylinder has an outer cylindrical surface. At least one of the cylindrical surfaces has at least two longitudinal grooves formed therein communicating with the inner ends of the radial bores and forming inflow lines and drain lines for pressure fluid extending from the end of the sensor body.Type: GrantFiled: May 19, 1988Date of Patent: September 19, 1989Assignee: Interatom GmbHInventor: Helmut Swars
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Patent number: 4860605Abstract: A device for producing an axial displacement of two opposing relatively rotatable thrust members having a plurality of conical rolling elements installed between the thrust members which roll on angled ramps hus change the distance between the thrust members, at least one of the thrust washers having a conical face; and a loose outside flange designed as a closed, flexible ring circumscribing the rollers which absorbs the radial forces proceeding from the loaded conical rollers and exerts a binding effect on the conical rollers.Type: GrantFiled: April 7, 1988Date of Patent: August 29, 1989Assignee: SKF GmbHInventors: Armin Olschewski, Armin Schlereth, Paul-Gerhard Hoch
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Patent number: 4838217Abstract: A cast iron camshaft (1) for an internal combustion engine, has at one end a toothed pulley (3) engaging a toothed belt, and an internal tensile member including a screw threaded bolt (5). The bolt engages part of the camshaft (1) adjacent the end where the toothed pulley (3) is fixed, and extends along a longitudinal bore (6), and has a screw threaded end (8) which engages an internal thread (9) positioned adjacent the point where the bending moment exerted on the camshaft by the toothed belt tension P becomes zero. As a result, the alternating bending loads which would otherwise occur in the vicinity of the cross-section X--X which is in danger, are converted into a continuous compressive load, which can be sustained by the cast iron material more effectively than an alternating bending load.Type: GrantFiled: February 10, 1988Date of Patent: June 13, 1989Assignee: Audi AGInventors: Max Ruf, Erwin Korostenski
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Patent number: 4838114Abstract: The invention is a poppet valve arrangement with a follower member rotatable with a drive shaft about the axis of rotation of the shaft. The follower member is rotatable within a hollow cam member having an internal cam profile with which the follower member is held in contact. Either the follower member or the cam member is capable of limited linear movement in a direction transverse to the axis of rotation of the shaft, and either of the follower member or the cam member is coupled to the poppet valve so that rotation of the shaft is translated into movement of either the follower member or the cam member and thereby into linear movement of the poppet valve.Type: GrantFiled: July 17, 1987Date of Patent: June 13, 1989Inventor: Frederick M. Stidworthy
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Patent number: 4835832Abstract: Camshaft assemblies, methods and apparatus are provided for making camshafts by the expansion of tubular shafts into prelocated cams, journals and other elements, if desired. Features of the camshafts include trilobe or polylobe element openings, preferably splined or serrated for low energy filling and high torque capacity and High Strength Low Alloy mild steel tubular shaft material. The method emphasizes trapping, or loading, the shaft of prevent axial lengthening during expansion such as by mechanical ballizing. The apparatus includes adjustable thrust blocks and locating plungers with incorporated flush pin gages together with hydraulic or other loading means all for use in carrying out the assembly method with various benefits from the incorporated features.Type: GrantFiled: June 24, 1988Date of Patent: June 6, 1989Assignee: General Motors CorporationInventors: Philip D. Arnold, Roy G. Kaywood
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Patent number: 4829951Abstract: A camshaft for a fuel injection pump of internal combustion engines, having reinforcements formed concentrically or following parallel to the cam outline and located adjacent the cams, and/or these and the camshaft bearings having a diameter enlarged in respect to the shaft diameter.Type: GrantFiled: July 11, 1988Date of Patent: May 16, 1989Assignee: Robert Bosch GmbHInventor: Walter Hafele
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Patent number: 4814556Abstract: The hub of a camstack is in the shape of a cone. There are ribs carried on the cone surface with the ribs having cam surfaces that are substantially parallel to the cone surface. The camstack is particularly adaptable for actuating a plurality of individual switches in a direction at an angle to the central axis and to the lines normal to the central axis. The individual switches are carried by a single common support member. The camstack permits the building of less expensive, smaller and more reliable appliance timers.Type: GrantFiled: January 15, 1988Date of Patent: March 21, 1989Assignee: Emhart Industries, Inc.Inventor: Ronald E. Cole
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Patent number: 4809562Abstract: A camshaft assembly is made by inserting a hollow tube into cams and journals in close fitting relationship. A plug is forced through the tube to a predetermined position. The cams and journals have circular shaped openings with circumferentially spaced apart axially extending grooves. The plug has circumferentially spaced apart protrusions which expand circumferentially spaced apart portions of the tube into the circumferentially spaced apart grooves in the cams and journals.Type: GrantFiled: September 30, 1987Date of Patent: March 7, 1989Assignee: The Torrington CompanyInventors: John A. Bendoraitas, Jeffrey A. Clark
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Patent number: 4807488Abstract: A coiled resistance element is connected to an insulator block by sequentially locating and holding the coil in place; camming the coil such that two adjacent coils are forced together and the coils on either side are forced away so as to form two gaps or openings; and, inserting the arms of an insulator block into the two gaps so as to force the two adjacent coils into the cross bar portion of a T-slot formed in the connector block. Upon removing the camming forces from the coil, the two adjacent coils will be separated and located in the cross bar portion of the T-slot to thereby secure the coil and insulator together.Type: GrantFiled: September 3, 1987Date of Patent: February 28, 1989Assignee: Carrier CorporationInventor: John R. McManus
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Patent number: 4802572Abstract: A cargo roller system (10) having drive rollers (13) and idler rollers (19) mounted in a tray (14) and selectively engageable with a motor (30) through a gear train (44). The motor (30) engages the gear train (44) through an idler gear (48) mounted in a motor mount (32) and a driven gear (50) mounted to the shaft (52) of the gear train (44). Coupling assemblies (60) connect the two halves of the gear train (44) to the driven gear (50). The coupling assembly (60) comprises a shaft (52) having a cylindrical piston (62) formed on one end thereof and a cylinder (66) slidably receiving the piston (62) on the other end thereof. A V-shaped opening (70) in the outer wall (72) of the cylinder (66) cooperates with a retaining pin (74) passing through the piston (62) translationally moving the gear train (44) into engagement with the rollers as the cylinder (66) is rotated by the motor (30).Type: GrantFiled: November 2, 1987Date of Patent: February 7, 1989Assignee: The Boeing CompanyInventors: Thomas H. Shorey, Mark W. Shorey
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Patent number: 4800633Abstract: A method of making a water level control device comprising the steps of forming a frame to have a substantially flat frame plate with opposite sides and with an elongated slot passing therethrough and having a first portion, forming a movable cam follower to be carried by the frame for setting the desired water levels to be provided by the device, forming a slide cam member to have a projection extending through the slot to guide sliding movement thereof relative to the frame, forming the projection means to have an interlocking unit interlocking with the frame while the projection is disposed in the first portion of the slot, forming the cam member to have a cam surface engaging the cam follower to set the same in desired water level setting positions thereof when the projection is in the first portion of the slot, forming the slot to have a second portion thereof for unlocking with the interlocking unit when the projection of the cam member is disposed in the second portion whereby the cam member can be easType: GrantFiled: July 8, 1987Date of Patent: January 31, 1989Assignee: Robertshaw Controls CompanyInventors: Thomas M. Buckshaw, David T. Llewellyn
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Patent number: 4798178Abstract: The method of manufacturing the compound camshaft comprises the steps of placing cast journal or bearing elements and/or cast cam elements on a camshaft body and fixedly connecting or securing such elements at the camshaft body. The cast journal or bearing elements and/or the cam elements contain an opening which is bounded by an internal profile or contour having a configuration which is governed by the type of connection to be made between such elements and the camshaft body. The internal profile or contour may be of a substantially conical shape and is at least partially left in a mechanically untreated condition. The compound camshaft thus obtained is optimized with respect to wear and weight and there are neither required cost-intensive and time-consuming operations, especially machining operations, nor complicated working steps during the manufacturing process.Type: GrantFiled: February 27, 1986Date of Patent: January 17, 1989Assignee: Georg Fischer AktiengesellschaftInventors: Walter Greulich, Karl Gut, Klaus Hornung, Guther Schulte
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Patent number: 4791827Abstract: In the conventional cam device for a pressure regulating valve, when the cam is rotated abruptly, a contact force between the roller and the cam surface decreases abruptly particularly during the cam return stroke. On the other hand, a rotational force also tends to be applied to the plunger during the plunger return stroke. Therefore, there exists a problem in that the roller rotates together with the plunger out of a correct engagement between the roller and the cam surface. To overcome this problem, the roller and the cam surface are engaged in convex and concave engagement relationship. A convex is formed in the roller and a concave is formed in the cam surface or vice versa.Type: GrantFiled: September 29, 1986Date of Patent: December 20, 1988Assignee: Aisin Seiki Kabushiki KaishaInventor: Shigeo Takahashi
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Patent number: 4781075Abstract: A camshaft in which the outer peripheral surface of a shaft (13) is provided with an axial groove (14), and a fitting member (10) is connected to the shaft (13) by liquid-phase sintering under the state in which a projection (12) on the surface of a bore (11) in the fitting member (10) is fitted into the groove (14). The projection (12) in the bore (11) of the fitting member (10) is formed so that its cross-sectional configuration is smaller than that of the groove (14) in the shaft (13). Therefore there is no possibility that the fitting member (10) made of a green compact can be damaged during the fitting or sintering.Type: GrantFiled: January 27, 1987Date of Patent: November 1, 1988Assignee: Nippon Piston Ring Co., Ltd.Inventors: Masaaki Yamaji, Shunsuke Takeguchi
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Patent number: 4781076Abstract: Axially spaced cams and bearing rings mounted on a tube are permanently secured to the tube by circumferentially spaced projections on the tube extending into grooves formed on the inside surfaces of the cams and bearing rings.Type: GrantFiled: January 17, 1986Date of Patent: November 1, 1988Assignee: The Torrington CompanyInventors: Michael J. Hartnett, Robert Lugosi, James Rollins, John P. Cook, Jeffrey A. Clark
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Patent number: 4777842Abstract: An oil groove capable of holding oil is formed on the inside surface of a camshaft bearing consisting of a cylinder head and a cam cap, at a position where the valve spring force acts. Oil is supplied to the oil groove from a cavity in a camshaft via an orifice provided in the camshaft. Since the part of the camshaft bearing which is exposed to the severest frictional contact is preferentially lubricated and at the same time the camshaft bearing as a whole can be well lubricated, even when the oil supply pressure from oil pump is insufficient on account of low engine speed or even when the viscosity of oil is low due to high temperature and thereby the oil film at the camshaft bearing is very thin, the camshaft bearing can be maintained in a well-lubricated state by the oil held in the oil groove, and thereby the binding can be prevented.Type: GrantFiled: April 24, 1987Date of Patent: October 18, 1988Assignee: Toyota Jidosha Kabushiki KaishaInventor: Minoru Yamada
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Patent number: 4774852Abstract: A camshaft for actuating the valve tappets in internal combustion engines includes a shaft of a cold drawn pipe and a cam member. Both parts are connected to one another via an axially slotted tolerance ring. The bore of the cam member has an inwardly directed projection with essentially radially extending sides and a partially cylindrical surface having a curvature which corresponds to the curvature of the shaft. The edges forming the slot of the tolerance ring rest against the sides of the projection. The resulting circumferential bracing of the tolerance ring ensures a secure support of the cam member on the shaft. The projection is located in that angular range of the cam member in which the rotating cam during operation is in contact with the tappet to be actuated. Thus, the cam member is additionally braced by the cylindrical surface of the projection when the highest radial force acts on the cam member during a full rotation.Type: GrantFiled: January 29, 1987Date of Patent: October 4, 1988Assignee: Etablissement SupervisInventor: Lukas Matt
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Patent number: 4768396Abstract: A rotary cam assembly includes a support shaft provided on a fixed bracket, a cam follower supported on the bracket so as to be slidably displaceable, a plate cam the outer circumferential portion of which has a cam surface contacted by the cam follower, the plate cam being freely rotatably mounted on the support shaft at a center hole, a cylindrical member extending along the central axis of the support shaft and having one end connected to the plate cam via coupling means formed in the center hole of the plate cam, and an input member connected to the other end of the cylindrical member for rotating the plate cam.Type: GrantFiled: December 9, 1987Date of Patent: September 6, 1988Assignees: Aisin Seiki Kabushiki Kaisha, Toyota Jidosha Kabushiki KaishaInventors: Shigeo Takahashi, Hiromi Hasegawa, Yutaka Taga
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Patent number: 4765605Abstract: A paper holding bin including a movable bottom tray for holding a stack of print receiving material such as paper. The bin is part of a machine using sheets of paper such as a copier or printer. The front edge of the paper stack is positioned at the front edge of the tray and against the front wall of the bin. A biasing spring is used to move the tray upwardly along the front wall of the bin until the top sheet of the stack bears against a paper feed roll. As sheets are fed from the stack, the spring continues to bias the tray upwardly so as to keep the top sheet of the stack against the feed roll. Cams of circular arc are provided at the rear edge of the tray, extending upwardly therefrom, to bear against the rear wall of the bin. In that manner a rolling pivot point is provided so that the front edge of the tray remains virtually equidistant from the front edge of the bin, regardless of whether the stack is large or small.Type: GrantFiled: November 24, 1986Date of Patent: August 23, 1988Assignee: International Business Machines CorporationInventor: Perry E. Abbott
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Patent number: 4763563Abstract: A swash plate (3) incorporated in a swash plate type compressor and comprising a boss (10) typically formed of aluminum material, which is fixedly secured on a drive shaft (2), and a swash plate assembly (11) extending obliquely from the boss (10), which assembly comprises a pair of front and rear contact plates (12) made of iron and brought into contact with a pair of shoes (6) which are accommodated in recesses (15a) of a piston (5), a connecting member (13) made of iron rigidly connecting the pair of contact plates (12), and a filler (14) made of aluminum material which completely fills the internal spaced formed between the contact plates (12).Type: GrantFiled: November 18, 1987Date of Patent: August 16, 1988Assignee: Kabushiki Kaisha Toyoda Jidoshokki SeisakushoInventors: Hayato Ikeda, Masayuki Kurahashi, Fukuo Gomi
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Patent number: 4763540Abstract: A device is provided for mechanically coupling two parallel shafts together allowing rotation thereof in a 2/1 ratio in an angular sector defined, by producing a very rigid connection without lost motion, with a minimum of parasite torque and insensitive to environmental vibrations. It includes a first piece mounted on a shaft and having two guide elements and a second piece mounted on a shaft having two arms provided with flat surfaces on which the guide elements move. The center of these latter, as well as the axis of rotation of the second shaft, are on a circle centered on the axis of rotation of the first shaft. Preferably, one of the pieces is made in two parts, one being integral with the associated shaft and the other freely mounted on this shaft, and a return spring holds said guide elements against the flat surfaces, these elements being formed by ball bearings.Type: GrantFiled: March 9, 1987Date of Patent: August 16, 1988Assignee: Thomson-CSFInventor: Charles Hubert
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Patent number: 4763614Abstract: Composite camshaft for internal combustion engines, comprising a support shaft carrying a series of sintered cam members in which through-holes are formed in their lobe parts defining the cam profiles. The shaft is tubular and the cam members are coupled to the shaft by hot driving.Type: GrantFiled: February 10, 1987Date of Patent: August 16, 1988Assignee: Fiat Auto S.p.A.Inventor: Antonio Burgio di Aragona
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Patent number: 4763698Abstract: A cam unit incorporating batten for controlling the reed of a weaving loom wherein the two members which support the double lever rollers and the conjugate discs of a double drive cam are provided in the form of bushings having end portions extending outside of a housing and which end portions are adapted to be selectively secured to rotatable shafts so that the cam unit may be positioned at any desired location relative to the shafts.Type: GrantFiled: December 16, 1986Date of Patent: August 16, 1988Assignee: D. Joaquin Aperribay ElosuaInventor: Jose A. Gea Aizpurua
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Patent number: 4763503Abstract: A cam shaft made from lobes having irregularly shaped apertures spaced along the longitudinal axis of a hollow tubular shaft. The method of making the cam shaft includes the steps of: inserting a hollow tubular shaft through the apertures of a plurality of the lobes axially and radially with respect to the longitudinal axis of the shaft. The method is characterized by flaring at least a first end of the shaft and backing the exterior of the first flared end to prevent axial radial movement thereof. In addition, a plug means is inserted into fluid sealing engagement with the interior of the first flared end to sandwich the flared end against the backing of the exterior thereof. The hollow shaft is filled with liquid and the opposite ends of the shaft are clamped between the plug means at the first flared end and a fluid sealing means at the opposite end of the hollow shaft. Hydraulic force is then applied to the interior of the shaft to expand the hollow shaft into engagement with the apertures of the lobes.Type: GrantFiled: June 22, 1987Date of Patent: August 16, 1988Inventors: Robert W. Hughes, Robert H. Brisson, Glenn R. Brisson
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Patent number: 4753270Abstract: A single stacked cam bearing surface is used to actuate several cam followers in such manner that the cam bearing surface can move past one or more cam followers without actuation thereof but can be caused to stop at and actuate any desired cam follower. A stacked disc cam bearing surface of the improved cam actuator assembly of the present invention includes rotatable cam sub-assembly discs each having a surface well. The plurality of cam followers that bear against the bearing surface are selectively actuated by a controlled positioning of the cam sub-assembly discs that radially aligns the wells of the bearing surface with a selected cam follower. During a controlled rotation of the cam assemblies through an angular position of an intermediate cam follower, the wells of the sub-assembly discs of the cam bearing surface are radially mis-aliged, and thereby fail to actuate the cam follower during rotation through an intermediate angular position.Type: GrantFiled: October 1, 1985Date of Patent: June 28, 1988Assignee: Omni-Flow, Inc.Inventors: Eric Lawhite, David B. Vafiades, Arthur J. Loud
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Patent number: 4750250Abstract: Method of fastening drive elements on a hollow shaft, which comprises:pushing n drive elements with a thickness a over a hollow shaft, retaining the drive elements at mutual spacings b and in respective desired azimuthal positions by means of holding devices;providing active sections of a material with a given limit of elasticity, a length c, mutual spacings d and being bounded by sealing lips on a hydraulic expanding device so that n(a+b)=n(c+d), pushing the hydraulic expanding device into the hollow shaft; andapplying a pressure through the hollow shaft to the active sections stressing the material of the active sections radially beyond the given limit of elasticity.Type: GrantFiled: August 26, 1986Date of Patent: June 14, 1988Assignee: Interatom GmbHInventors: Wolfgang Maus, Helmut Swars
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Patent number: 4745820Abstract: In combination with a plunger operated device such as a standard pushbutton limit switch (2), an auxiliary rotary actuator (4) having an operating arm (36) attached to a rotary cam(40) having a convex conical cam surface (40c) in contact with a complementary concave conical cam surface (42a) of a reciprocating linear motion cam follower (42), with the cone axes (40d, 42c) being in alignment and offset from the axis of rotation (40e) of the cam. A switch plunger (12) abutting shaft (38) is threaded in a bore (42b) in the cam follower (42) and has a smooth round shaft portion (38b) slidingly guided in a smooth bore (40b) in the cam to be adjustable up or down by a screwdriver slot (38c) in its upper end accessible when the actuating arm (36) mounting screw (46) is removed.Type: GrantFiled: January 5, 1987Date of Patent: May 24, 1988Assignee: Eaton CorporationInventors: Richard G. Benshoff, Ernest R. Remillard
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Patent number: 4730511Abstract: A mechanism for actuating a non-slidable disk type valve, which comprises a hollow cam body having a specific guide groove and axially slidable without rotation within a stationary casing, a cam follower relatively movably engaged with the guide groove and carried on a rear end of an output shaft which is supported rotatably and inclinably by a bearing member inclinably supported by the casing, a valve drive shaft supporting a disk-shaped valve body via a crank and supported on a machine frame so as to be co-rotatable and co-inclinable with the output shaft, a connector socket extending forward from the bearing member into engagement with the valve drive shaft so as to slightly push down or raise up the valve drive shaft thereby to urge the valve body toward or away from a valve seat so that the valve takes its closing position or its preparatory position before the valve is rotated to take its releasing position.Type: GrantFiled: March 9, 1987Date of Patent: March 15, 1988Assignee: Osaka Kikiseizo Kabushiki KaishaInventor: Yukio Tsujimura
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Patent number: 4708029Abstract: A fabricated camshaft having individual lobes mounted on tubular collars that are in turn mounted on an internal tubular member that is expanded between the collars to form bearing journals for the camshaft.Type: GrantFiled: December 15, 1986Date of Patent: November 24, 1987Assignee: Nippon Piston Ring Co., Ltd.Inventor: Shigeru Urano