Patents Represented by Law Firm Wegner, Stellman, McCord, Wood & Dalton
  • Patent number: 4387842
    Abstract: A bulk material feeder (10) has two rollers (12,14), at least the lower (14) of which is driven (24,26). Strip material (34) is threaded around the side of the upper roller (12) toward the direction of feed, between the rollers (12,14), around the side of the lower roller (14) opposite the direction of feed and to downstream machinery (38) spaced from the feeder (10). Roller (12,14) spacing is greater than material (34) thickness precluding compression of the material (34). Feed is produced by friction between the roller (14) and material (34) only. Feed rate is greater than usage thereby producing a depending loop (40) between the feeder (10) and the downstream machinery (38). In one embodiment, increasing loop (40) size decreases material (34) and roller (14) contact, causing relative slippage and a discontinuance of feed. In another embodiment, both rollers (12,14) are driven and loop (40) size is limited by a photoelectric device (42) and associated control circuitry.
    Type: Grant
    Filed: March 31, 1980
    Date of Patent: June 14, 1983
    Assignee: Caterpillar Tractor Co.
    Inventors: Samuel B. Stevens, James R. Lytle, Sr.
  • Patent number: 4372156
    Abstract: A method of determining the projection of the upper end (15) of a cylinder liner (14) above the top surface (13) of a cylinder block structure (10). The cylinder liner (14) is caused to be fully inserted into the cylinder bore (11) by a press ring (32) acting on the upper end of the cylinder liner concurrently with the measurement of its position. The press ring is resiliently forced against the top surface (37) of the cylinder liner by a plurality of pressure springs (35) and a pressure plate (25). The pressure plate is urged into engagement with the cylinder block structure top surface (13) by a holddown bar (26). The measuring system utilizes a gage indicator (20) having a probe which is selectively engaged with the upper surface of the cylinder liner adjacent positions of force transfer between the press ring and cylinder liner. The probe is caused to determine the position of the cylinder block structure upper surface (13) selectively directly or indirectly.
    Type: Grant
    Filed: February 17, 1981
    Date of Patent: February 8, 1983
    Assignee: Caterpillar Tractor Co.
    Inventor: Richard A. Meismer
  • Patent number: 4371205
    Abstract: A vehicle door lock (201) and latch (204) assembly is provided whereby a key may be used to lock the door (200) and to prevent rotation of the outside door handle (214). An inside door handle (202) is provided remote from the lock assembly (201) and connected thereto by a linkage (216,232,246) which enables the inside handle (202) to operate the lock assembly (201) by overridng the key lock (308). The inside handle (202) can move the linkage to open the door (200) and lock or unlock the lock assembly (201). The outside handle (214) can open the door (200) only if the lock assembly (201) is unlocked. The lock assembly (201) may be unlocked from the outside only by turning the key in the lock (308) to the unlocked position.
    Type: Grant
    Filed: July 7, 1980
    Date of Patent: February 1, 1983
    Assignee: Caterpillar Tractor Co.
    Inventor: John R. Kaveney, Jr.
  • Patent number: 4368652
    Abstract: A reversible friction plate including a generally circular, disk-like member having generally parallel, opposed friction surfaces, an opening in the center of the member, at least three, equally angularly spaced tangs extending radially outwardly from the periphery of the member, reaction member receiving apertures in each tang displaced from the center thereof in the circumferential direction, the reaction member receiving apertures in each tang being equally angularly spaced, and a spring mounting formation on each tang displaced from the center thereof in the circumferential direction oppositely from the reaction member receiving apertures. Also disclosed is a friction pack utilizing a plurality of the friction plates and a planetary gear transmission employing such a friction pack which eliminates precision machining in the fabrication thereof.
    Type: Grant
    Filed: September 16, 1980
    Date of Patent: January 18, 1983
    Assignee: Caterpillar Tractor Co.
    Inventor: Willis E. Windish
  • Patent number: 4366674
    Abstract: An internal combustion engine with a Rankine bottoming cycle including an internal combustion engine (10) with an exhaust (12) for exhausting combustion gases. Included is an expander (24) having a mechanical output (26) for performing useful work and a boiler (18). Liquid is supplied in a line (20) to the boiler to be vaporized therein and the vaporized liquid is supplied by a line (22) to the turbine (24) to drive the same. Heat for vaporizing the liquid in the boiler (18) is obtained from the exhaust (12) on a line (62). The exhaust gases are further expanded in an expander (72) thereby providing additional useful work.
    Type: Grant
    Filed: June 6, 1980
    Date of Patent: January 4, 1983
    Assignee: Caterpillar Tractor Co.
    Inventor: Larry A. Eakman
  • Patent number: 4363231
    Abstract: A vehicle door lock (106) and latch (104) assembly is provided whereby a key may be used to lock the door (100) and to prevent rotation of the outside door handle (108). A lock handle (116) is provided inside the vehicle door (100) for overriding the key lock (110) to permit the inside and outside handles (114,108) to operate to open the door. Both the key lock (110) and the lock handle (116) when turned operate a linkage (172,168) which is connected to the locking cam (158) enabling the locking cam (158) to be moved between its locked and unlocked positions. Even with the lock handle (116) and the key lock (110) in the locked position, the inside handle (114) can be turned to move the locking cam (158) to the unlocked position and to open the door (100). The outside handle (108) can now be used to open the door also. The outside handle (108) can also be released for operation by turning the key in the key lock (110) to the unlocked position.
    Type: Grant
    Filed: July 7, 1980
    Date of Patent: December 14, 1982
    Assignee: Caterpillar Tractor Co.
    Inventor: John R. Kaveney, Jr.
  • Patent number: 4362089
    Abstract: A fluid power control system (17) having an improved control valve (20) providing reduced regulated pressure fluid selectively from a high pressure pump supply (P) or the fluid motor (10) under conditions wherein the pump supply has failed to supply the desired pressurized fluid. The system utilizes a control valve (20) having a spool (29) provided with first transfer passage (41) and second transfer passage (42). The first transfer passage is adjustably throttled as a result of movement of the spool relative to an adjacent inlet port (37) and the second transfer passage (42) is adjustably throttled by movement of the spool relative to an adjacent inlet port (38). Inlet port (37) is connected to the high pressure fluid supply P and inlet port (38) is connected to the head end (13) of the cylinder (11) of the fluid motor through a check valve (44).
    Type: Grant
    Filed: June 16, 1980
    Date of Patent: December 7, 1982
    Assignee: Caterpillar Tractor Co.
    Inventors: Kurt B. Melocik, Robert W. Earley
  • Patent number: 4360169
    Abstract: An apparatus (16) is provided for winding inextensible flexible elongate material, such as cable (15), on a carcass (10) of a body while maintaining the tension on the elongate material (15) substantially uniform. A shuttle (20) carries at least one compensator arm assembly (30,130) resiliently supporting a housing (44,144) having a sheave (50,150) in line with an energy-dissipator (80,180) on the side of the sheave (50,150) closest to the carcass so that the elongate material (15) being fed from a spool (28) under tension and passing over the sheave (50,150) as the shuttle (20) is rotating around the torus-shaped body will apply the elongate material to the carcass (10) under substantially uniform tension as the arm assembly (30,130) stores up elongate material (15) during periods of low material demand and pays out elongate material during periods of high material demand.
    Type: Grant
    Filed: May 8, 1980
    Date of Patent: November 23, 1982
    Assignee: Caterpillar Tractor Co.
    Inventors: Samuel B. Stevens, Richard W. Kizer
  • Patent number: 4360055
    Abstract: A heat exchanger such as an oil cooler for exchanging heat between two fluids such as coolant water and oil in which the heat exchanger has a tank or casing through which coolant is circulated and containing a stack of heat exchange units each comprising a pair of plates joined together at peripheral edges but spaced apart to provide an oil path defined also by spacer means through the successive internal fluid chambers of the units and a coolant path also defined by spacer means between the units. The spacers between the units comprise sections of the plates making up the units and spacers. The disclosure also includes a bypass valve for bypassing most of the internal fluid chambers in the successive units when fluid such as oil is above a selected viscosity which indicates that much less cooling is required.
    Type: Grant
    Filed: September 8, 1976
    Date of Patent: November 23, 1982
    Assignee: Modine Manufacturing Company
    Inventor: Donald J. Frost
  • Patent number: 4360313
    Abstract: A lift fixture (10) for holding and centering a workpiece (93) includes a handling ring (16) defined by a yoke (17) and a clamp slide (20) mounted on the yoke, means (48) for closing the clamp slide (20), a support apparatus (12) for positioning the handling ring (16), and a plurality of angularly spaced holding mechanisms (33,34,40,41) for gripping the workpiece (93). The holding mechanisms (33,34,40,41) are movably mounted to the handling ring (16) so as to move relative to the ring along a line generally tangent to the workpiece (93). The holding mechanisms (33,34,40,41) are biased to a centered position, as by springs (87,88), so that when the workpiece (93) is lifted, it is urged to a centered position within the ring (16).
    Type: Grant
    Filed: March 24, 1980
    Date of Patent: November 23, 1982
    Assignee: Caterpillar Tractor Co.
    Inventor: Ronald L. Satzler
  • Patent number: 4360312
    Abstract: A scrap removal apparatus (35) for retrieving scrap material (32,33) from a two-piece table (19) includes a programmed lift arm assembly (37) movable between the table (19) and scrap accumulating areas (82,83) and has remotely actuable mechanical gripping devices (45) for positively clamping onto the scrap material (32,33). One form of gripping device is a clamp (50) having a finger (57) and an enlarged pad (54), the fingers (57) of the respective clamps (50) movable through slots (70) defined in the outer table edge (21) to grip the overlying outer scrap (32). Another form of gripping device includes a blade (80) for pinning the inner scrap (33) against a stop (73) near the table center.
    Type: Grant
    Filed: June 23, 1980
    Date of Patent: November 23, 1982
    Assignee: Caterpillar Tractor Co.
    Inventor: Ronald L. Satzler
  • Patent number: 4359864
    Abstract: Apparatus for raising the temperature of internal combustion engine exhaust gases high enough to burn collected particulate material from particulate filter means (27/56) in the exhaust system. An electrical resistance heating element (37/71) which confronts only a small part of the inlet surface of particulate filter means (27/56) is moved relative to said inlet surface so as to progressively and cyclically burn the particulates from the filter means.
    Type: Grant
    Filed: February 5, 1981
    Date of Patent: November 23, 1982
    Assignee: Caterpillar Tractor Co.
    Inventor: John M. Bailey
  • Patent number: 4355973
    Abstract: A radiant heating apparatus of the type that has a heating tube (13) with ends (14, 15) opening outside the furnace chamber (12), has first and second regenerator cores (33, 34) in opposite first and second tube ends (14, 15) and first and second fluid fuel burners (37, 38) in the tube (13) at the inner ends of the respective first and second cores (33, 34). A cycling control (30, 299) causes inlet air to be admitted to the first end (14) of the tube (13) while the first burner (37, 38) operates and to be exhausted through the second end (15) of the tube (13), thus heating the second core (34). Thereafter the cycling control (30, 299) causes inlet air to flow through the heated second core (34) while the second fluid fuel burner (37, 38) operates, thus heating the first core (33); and the unit continues to heat the regenerator cores alternately.
    Type: Grant
    Filed: February 17, 1981
    Date of Patent: October 26, 1982
    Assignee: Caterpillar Tractor Co.
    Inventor: John M. Bailey
  • Patent number: 4344811
    Abstract: An apparatus (10) is provided for positioning an driving a toroidal body (11), such as a sand core or the like, during the building of portions of the body. The apparatus (10) includes a height adjusting mechanism (16) for raising the horizontal mid-circumferential plane (A',A") of the body so that it will intersect the rotational center (A) of a shuttle (15) which rotates in a plane transverse to the mid-circumferential plane of body (11). The apparatus (10) includes a centering and driving mechanism (17) which includes idler roller devices (18,20) and a drive roller device (22) whereby the body is positioned and driven with the rotational center (A) of the shuttle (15) lying not only on the horizontal mid-circumferential plane (A',A") of the body, but also coinciding with the center of a cross section of the body formed by a plane of the shuttle (15).
    Type: Grant
    Filed: July 14, 1980
    Date of Patent: August 17, 1982
    Assignee: Caterpillar Tractor Co.
    Inventor: James E. Carney
  • Patent number: 4343119
    Abstract: An improved anti-skid tread or grating (10) design is provided with gripping members or rosettes (30) having a plurality of upstanding individual lobes (36) which are configured in such a way and project high enough to provide an excellent gripping surface. The lobes (36) of the design are self-cleaning, and have non-continuous gripping edges at their crests (40) that accommodate a greater build up of ice or mud without clogging the grating (10).
    Type: Grant
    Filed: December 22, 1980
    Date of Patent: August 10, 1982
    Assignee: Caterpillar Tractor Co.
    Inventor: William A. Bahnfleth
  • Patent number: 4343064
    Abstract: A connector or adaptor is provided for connecting a windshield wiper arm (1) to a superstructure (5) of a windshield wiper blade. The arm end has aligned bores (2) and a spring clip (3) for securing the arm to a pin on a blade. The connector or adaptor is a one or two part member (10, 11, 23, 32, 42) which is secured to a rivet (7) on the blade and has laterally located, sidewardly extending pins (21) for engagement with the arm end or has vertically located, sidewardly extending pins (31, 41) for engagement with the arm end.
    Type: Grant
    Filed: January 4, 1980
    Date of Patent: August 10, 1982
    Assignee: Champion Spark Plug Europe S.A.
    Inventors: Johan H. van den Berg, Guiseppe Maiocco
  • Patent number: 4343563
    Abstract: A first member (7) with a tapered spline (6) and a method of making same, which tapered spline (6) provides an improved backlash-free mating with a second member (10) having a conventional straight spline (9). The method of forming the spline (6) consists of distorting a first member (7) along its central axis (14), broaching the first member (7) to form a straight cylindrical spline, and returning the first member (7) to its undistorted condition whereby the straight spline becomes a tapered spline (6).
    Type: Grant
    Filed: May 16, 1980
    Date of Patent: August 10, 1982
    Assignee: Caterpillar Tractor Co.
    Inventor: James R. Bernhagen
  • Patent number: 4341243
    Abstract: A fluid control system for controlling a fluid motor (12) wherein a pressure regulating pilot valve (10) controls a directional control valve (11) by manipulation of handle (21) associated with the pilot valve (10). The directional control valve (11) includes a make-up valve (84). The pilot valve (10) includes a spool (26) having a recess (98) providing selective communication between the backside of the movable valve member (86) of the make-up valve and an exhaust recess (100) communicating with the reservoir tank (36). A direct mechanical connection is provided from the handle (21) to the spool (26) as the result of an abutment of an upper end portion (102) of the spool (26) with a surface (49) on the plunger (28) engaged by the control handle in effecting the positive movement of the spool (26) to effect the desired communication between the recess (98) and recess (100). The spool normally is resiliently movable to effect a desired pressure regulation fluid flow through the pilot valve (10).
    Type: Grant
    Filed: June 16, 1980
    Date of Patent: July 27, 1982
    Assignee: Caterpillar Tractor Co.
    Inventor: Kurt B. Melocik
  • Patent number: 4341070
    Abstract: A method of performing work and an apparatus for performing the method utilizing the following thermodynamic cycle. Ambient air is isothermally compressed to a predetermined degree (A-B) and then heat is added to the air at constant pressure (B-C). This is followed by isentropic compression (C-D) which in turn is followed by heat addition at constant volume (D-E). Thereafter follows isentropic expansion (E-F-H-G) then finally heat recovery (G-A). The recovered heat (G-A) is preferably utilized for the initial heat addition (B-C).
    Type: Grant
    Filed: March 31, 1980
    Date of Patent: July 27, 1982
    Assignee: Caterpillar Tractor Co.
    Inventor: John M. Clarke
  • Patent number: RE31218
    Abstract: A diesel fuel supply system for use with a diesel engine including a fuel pump for supplying fuel to the engine, a fuel tank connected to the pump for delivering fuel to the pump, a fuel additive tank, a valve, conduits connecting the additive tank to the pump through the valve in parallel to the fuel tank, and an operator for selectively operating the valve.
    Type: Grant
    Filed: January 21, 1980
    Date of Patent: April 26, 1983
    Assignee: Caterpillar Tractor Co.
    Inventors: George E. Hicks, John W. Litherland, Arlan G. Martin, Lawrence Williams