Patents by Inventor Roger Macpherson

Roger Macpherson has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 5419419
    Abstract: A hydraulic control system for shifting a positive variable drive transmission includes a series of indexing mechanisms 90 through 95 for indexing a series of overrunning clutches between to two limit positions. A selector valve 150 controlled by a computer 162 directs flows of pressurized fluid to the indexing mechanisms 90 through 95. A motor 152 indexes a shear plate 172 of the selector valve 150 to predetermined positions for shifting the transmission.
    Type: Grant
    Filed: January 14, 1994
    Date of Patent: May 30, 1995
    Inventor: Roger Macpherson
  • Patent number: 5297450
    Abstract: A variable speed transmission includes parallel driver and driven shafts (54, 56) which mount respective series of intermeshing gears (60-65, 70-75) of progressively increasing gear ratio for selectively transmitting power from one shaft to the other. A series of two-way roller clutches are interposed between the driven shaft (56) and respective gear members (70-75) of the series of driven gears. The roller clutches are engageable for rotatively coupling the driven gears (70-75) to the driven shaft (56) and are disengageable for permitting relative rotation between the driven gears and the driven shaft. Each of the roller clutches includes a cam disk (10) having a plurality of recesses (20) formed in its peripheral surface and a roller retainer (12) circumferentially supporting a plurality of rollers (32) within respective recesses (20) in the cam disk.
    Type: Grant
    Filed: November 21, 1991
    Date of Patent: March 29, 1994
    Inventor: Roger MacPherson
  • Patent number: 5145042
    Abstract: A variable speed transmission includes parallel driver and driven shafts (54, 56) which mount respective series of intermeshing gears (60-65, 70-75) of progressively increasing gear ratio for selectively transmitting power from one shaft to the other. A series of two-way roller clutches are interposed between the driven shaft (56) and respective gear members (70-75) of the series of driven gears. The roller clutches are engageable for rotatively coupling the driven gears (70-75) to the driven shaft (56) and are disengageable for permitting relative rotation between the driven gears and the driven shaft. Each of the roller clutches includes a cam disk (10) having a plurality of recesses (20) formed in its peripheral surface and a roller retainer (12) circumferentially supporting a plurality of rollers (32) within respective recesses (20) in the cam disk.
    Type: Grant
    Filed: November 21, 1991
    Date of Patent: September 8, 1992
    Inventor: Roger MacPherson
  • Patent number: 5103690
    Abstract: An all wheel drive system for a motor vehicle is normally set up to operate in a two wheel drive mode except in vehicle operating situations where increased traction is desired. A drive shaft of a drive line is connected to front and rear axles through respective speed adjusters. A front speed adjuster provides for transmitting a rotational speed to the front drive axle that is slower than a rotational speed transmitted by the rear speed adjuster to the rear drive axle. At least one overrunning clutch is interposed in the drive line to a pair of front drive wheels for permitting the front drive wheels to be rotated out of engagement with the drive line by motion of the vehicle.
    Type: Grant
    Filed: May 30, 1990
    Date of Patent: April 14, 1992
    Inventors: Roger Macpherson, Peter R. Geib
  • Patent number: 4958533
    Abstract: A variable speed transmission includes parallel drive and driven shafts which mount respective series of intermeshing gears of progressively increasing gear ratio for selectively transmitting power from one shaft to the other. A series of two-way roller clutches are interposed between the driven shaft and respective gear members of the series of driven gears. The roller clutches are engageable for rotatively coupling the respective gear members to the driven shaft and are disengageable for permitting relative rotation between the respective gear members and the driven shaft. Each of the roller clutches includes a cam disk having a plurality of recesses formed in its peripheral surface and a roller retainer circumferentially supporting a plurality of rollers within respective recesses in the cam disk. A hydraulically controlled actuator is connected to each of the retainers for indexing the roller retainers together with the plurality of rollers between respective limit positions within the recesses.
    Type: Grant
    Filed: May 26, 1989
    Date of Patent: September 25, 1990
    Inventor: Roger Macpherson
  • Patent number: 4759133
    Abstract: Method and apparatus for automotive wheel alignment in which a telescope is mounted with its axis precisely parallel with the end plane defined by the automotive wheel hub. A calibrated target is placed and centered directly in front of the telescope on its optical axis. This procedure is repeated for the wheel on the other side of the vehicle. The vehicle is then moved a distance, for example 50 feet, from the targets which are left in place. The telescope is again placed on the wheel hubs and the targets sighted. If both targets remain on the optical axis the wheels are in perfect alignment. If they are not, the calibrations on the target indicate the direction and extent of misalignment.
    Type: Grant
    Filed: April 13, 1987
    Date of Patent: July 26, 1988
    Inventor: Roger Macpherson
  • Patent number: 4219142
    Abstract: A plurality of pairs of tubular members are secured at their lower ends in spaced relation on the roof or trunk lid of an automobile by conventional suction cups. One member of each pair has a socket in its upper end for receiving and supporting the goose neck portion of an inverted bicycle frame, and the other member of the pair has a cylindrical projection on its upper end adapted to slide snugly into the bore of the tubular seat post of a bicycle frame after the bicycle seat has been removed. Threaded rods extend between and adjustably separate the two support members of each pair; and the pairs of members are held in laterally spaced relation by a plurality of spacer bars which extend between adjacent pairs of support members. At least one of the spacer bars is a flexible torsion bar which permits at least one support member of a pair to be pivoted about its lower end slightly to adjust the space between the upper ends of the pair so that bike frames of different sizes can be held on the rack.
    Type: Grant
    Filed: April 27, 1979
    Date of Patent: August 26, 1980
    Inventor: Roger Macpherson
  • Patent number: 4068825
    Abstract: A load-bearing plate is mounted by a plurality of pivotal links above a base plate, and solely for vertical movement toward and away from the base plate. An intermediate frame including two, spaced, parallel side bars is supported by the links between the two plates for swinging movement on the base plate about a pair of spaced, parallel axes. Driving means, such as a hydraulic screw jack is mounted between the two side bars for swinging movement therewith, and has a reciprocable piston rod attached to one of two, parallel shafts mounted at opposite ends in slots in the side bars to reciprocate longitudinally of the bars during the raising and lowering of the load-bearing plate. The reciprocable movement of the two shafts oscillates the links which in turn cause the load-bearing plate to reciprocate only vertically relative to the base plate.
    Type: Grant
    Filed: October 26, 1976
    Date of Patent: January 17, 1978
    Inventor: Roger Macpherson
  • Patent number: 3951551
    Abstract: To test the alignment of the front wheels of an automotive vehicle, the front wheels of the vehicle are driven onto a pair of spaced, parallel rollers, one of which is driven to effect rotation of the front wheels while the vehicle is standing motionless. The hubcaps are removed and a plane mirror is secured by a magnet to the hub of each front wheel. A laser beam is shone onto each mirror through a central hole in a chart. Means is provided for adjusting the the mirror angularly to tilt its plane relative to the axis of the associated spindle of the vehicle. Each mirror can be adjusted so that its plane is perfectly perpendicular to the axis of the spindle. Then the wheels can be accurately tested for toe, run-out and camber.
    Type: Grant
    Filed: October 7, 1974
    Date of Patent: April 20, 1976
    Assignee: American Tatra, Inc.
    Inventor: Roger Macpherson