Patents by Inventor Masashi Nagano

Masashi Nagano 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: 5505111
    Abstract: A connecting structure between a bicycle pedal and a cleat is formed of hooks pivotably supported by a pedal body for engaging and releasing the cleat, and an urging device for urging the hooks toward engaging positions. A first cam mechanism is provided between each of the hooks and the cleat for causing the hook to pivot in a releasing direction when the cleat is inclined about a first imaginary axis extending substantially along a direction of pivotal movement of the hooks. The first cam mechanism includes a first pressed edge defined on one of the hooks and opposed to the cleat, and a first pressing edge defined on the cleat and opposed to one of the hooks for slidable contact with the first pressed edge. The first pressed edge and first pressing edge overlap each other as seen in a direction perpendicular to the pedal body tread.
    Type: Grant
    Filed: January 12, 1994
    Date of Patent: April 9, 1996
    Assignee: Shimano Inc.
    Inventor: Masashi Nagano
  • Patent number: 5497680
    Abstract: A bicycle pedal including a front engaging device and a rear engaging device arranged with a cleat bearing surface therebetween in a fore and aft direction of the pedal for engaging the cleat. The rear engaging device is pivotable about a pivotal axis extending parallel to a pedal shaft, and is urged by an urging element in a direction to engage the cleat. The rear engaging device includes a first split part for engaging the cleat, and a second split part attached to the pedal for supporting the first split part. The first split part is movable with the cleat in an engaged position, relative to the second split part within a predetermined range in a direction traversing the fore and aft direction of the pedal. The first split part includes a contact surface for pressing the cleat from above, and a plurality of engaging surfaces spaced from each other along the pedal shaft for pressing the cleat in a pivoting direction around the pivotal axis, i.e. in the fore and aft direction of the pedal.
    Type: Grant
    Filed: October 25, 1994
    Date of Patent: March 12, 1996
    Assignee: Shimano Inc.
    Inventor: Masashi Nagano
  • Patent number: 5446977
    Abstract: A cycling shoe having a bottom sole. The bottom sole includes a plate member having a cleat-attaching portion and a cover member for covering at least a cleat-attaching area including the cleat-attaching portion and its periphery of the plate member. A portion of the cover member overlapping the cleat-attaching area is rendered removable.
    Type: Grant
    Filed: November 23, 1994
    Date of Patent: September 5, 1995
    Assignee: Shimano Inc.
    Inventors: Masashi Nagano, Shinpei Okajima
  • Patent number: 5447362
    Abstract: A quick release apparatus includes a tightening shaft including a screw portion at one end thereof, a tightening control lever mounted on the other end of the tightening shaft, and a clamp mounted on the screw portion. The clamp includes a nut meshed with the screw portion, a contact element axially movable relative to the nut and including a surface for contacting an object, and an elastic element disposed between the nut and the contact element. The contact element and nut are disposed coaxially with the tightening shaft to be rotatable relative to each other around the tightening shaft. This quick release apparatus further includes a displacement amplifying link mechanism such as a single lever mechanism for amplifying a relative axial displacement between the nut and contact element. A subtle relative displacement between the nut and contact element is presented as an enlarged displacement for observation purposes.
    Type: Grant
    Filed: August 10, 1992
    Date of Patent: September 5, 1995
    Assignee: Shimano, Inc.
    Inventor: Masashi Nagano
  • Patent number: 5413534
    Abstract: A sprocket assembly for a bicycle having a large sprocket and a small sprocket. The large sprocket includes chain support projections formed on the side surface opposed to the small sprocket. Each projection includes a contact portion defining a contact surface for contacting, without meshing, a lower end of a chain shifted from the small sprocket to the large sprocket. The chain support means are arranged for causing the contact surface to contact the chain engaging the small sprocket and pick up the chain radially outwardly of the large sprocket during a chain shift from the small sprocket to the large sprocket.
    Type: Grant
    Filed: December 13, 1993
    Date of Patent: May 9, 1995
    Assignee: Shimano Inc.
    Inventor: Masashi Nagano
  • Patent number: 5400675
    Abstract: A control device attachable to the handlebar of a bicycle for controlling a brake mechanism and speed mechanism. The control device comprises a bracket fixed to the handlebar and a brake lever pivotable crosswise relative to the bracket. The brake mechanism is controlled by fore and aft pivotal movement of the brake lever, while the speed change mechanism is controlled by sideways pivotal movement of the brake lever.
    Type: Grant
    Filed: February 22, 1994
    Date of Patent: March 28, 1995
    Assignee: Shimano, Inc.
    Inventor: Masashi Nagano
  • Patent number: 5390767
    Abstract: A brake caliper support structure has a stationary member fixed to a bicycle frame, a support shaft fixed to the stationary member, a brake caliper pivotably supported by the support shaft, a spring having one end thereof engaged with the brake caliper, and an elasticity adjusting device disposed between the brake caliper and spring for adjusting elasticity of the spring. The elasticity adjusting device includes an engaging member and an adjusting screw. The engaging member is rotatable about the support shaft. This support structure further includes a shoulder and a groove formed on the support shaft for restricting displacement of the engaging member on the support shaft.
    Type: Grant
    Filed: June 1, 1994
    Date of Patent: February 21, 1995
    Assignee: Shimano Inc.
    Inventors: Masashi Nagano, Tsuyoshi Sakashita, Masanori Sugimoto
  • Patent number: 5379665
    Abstract: A bicycle pedal for attaching to a crank arm having a pedal shaft including an attachment portion formed at one end thereof and attached to the crank arm, the pedal shaft defining a small diameter portion formed adjacent the other end thereof and having a smaller diameter than the attachment portion, and a first and a second ball bearings arranged in a region of the small diameter portion and spaced apart from each other axially of the pedal shaft. A needle bearing is disposed adjacent the ball bearings, and a pedal body is rotatably supported on the small diameter portion through the first and second ball bearings and the needle bearing. The pedal body defines at least one tread on a surface thereof. The needle bearing may be disposed between the first ball bearing and second ball bearing, or may be disposed closer than the first and second ball bearings to the crank arm or closer than the first and second ball bearings to an extreme end of the pedal shaft.
    Type: Grant
    Filed: June 4, 1992
    Date of Patent: January 10, 1995
    Assignee: Shimano Inc.
    Inventor: Masashi Nagano
  • Patent number: 5373918
    Abstract: A bicycle brake apparatus comprising a pair of brake calipers each attached to a bicycle frame to be pivotable about a first axis, and a connecting structure for connecting one of the brake calipers to a brake control cable. Each brake caliper includes a proximal region pivotally attached to the bicycle frame, a brake pad mounting region for supporting a brake pad, and an arm region extending from the brake pad mounting region. The connecting structure includes a control cable receiving surface formed on the arm region of one of the brake calipers, and a cable clamp for engaging the control cable receiving surface. The cable clamp is movable along a second axis extending substantially parallel to the arm region of this brake caliper to fixedly hold the brake control cable between the control cable receiving surface and the cable clamp. The second axis extends substantially perpendicular to the first axis and in a direction outwardly and upwardly of the bicycle.
    Type: Grant
    Filed: October 26, 1992
    Date of Patent: December 20, 1994
    Assignee: Shimano Inc.
    Inventor: Masashi Nagano
  • Patent number: 5330220
    Abstract: An apparatus for rotatably fitting a fork stem (4) in a head tube (5) of a bicycle. This apparatus has a first race element (1) fitted on the fork stem, and a second race element (2) opposed to the first race element and inserted into an annular space defined between the fork stem and the head tube. The first race element (1) defines a first contact surface (1b). A first ring element (7) defining a first rolling body supporting surface (7b) is fitted on the first race element (1). The second race element (2) defines a second contact surface (2b). A second ring element (8) defining a second rolling body supporting surface (8b) is fitted on the second race element (2). The first contact surface (1b) is shaped to have a component of reaction force acting radially inwardly of the fork stem from the first ring element to the first race element when rolling bodies (6) are clamped between the first supporting surface and second supporting surface.
    Type: Grant
    Filed: October 30, 1992
    Date of Patent: July 19, 1994
    Assignee: Shimano Inc.
    Inventor: Masashi Nagano
  • Patent number: 5325735
    Abstract: A speed control apparatus for controlling a change speed device of a bicycle and for displaying speed conditions produced by the change speed device. The speed control apparatus includes a shifting device, and a speed indicator for displaying the speed conditions produced by the change speed device. The shifting device includes a takeup reel rotatable about a first axis to wind a speed control cable, and a shift lever for rotating the takeup reel. The speed indicator includes an indicating element disposed above the takeup reel and at least partly overlapping the takeup reel in plan view. The indicating element is interlocked through engagement to the shifting device to be rotatable about a second axis intersecting the first axis.
    Type: Grant
    Filed: January 15, 1993
    Date of Patent: July 5, 1994
    Assignee: Shimano Inc.
    Inventor: Masashi Nagano
  • Patent number: 5326157
    Abstract: A wheel mounting apparatus for attaching a wheel to the wheel forks of the body frame of a bicycle, comprising an axle for rotatably supporting the wheel and engageable with the wheel forks of the body frame, a retaining device for preventing detachment of the axle from the wheel forks, the retaining device being constantly biased to an operative position to prevent detachment of the axle from the wheel forks, or an inoperative position to allow detachment of the axle from the wheel forks, and a control device for switching the retaining device from the inoperative position to the operative position. The control device is operable with rotation of the wheel relative to the wheel forks to switch the retaining device automatically from the inoperative position to the operative position.
    Type: Grant
    Filed: June 29, 1992
    Date of Patent: July 5, 1994
    Assignee: Shimano Inc.
    Inventor: Masashi Nagano
  • Patent number: 5322487
    Abstract: A self-contained change speed apparatus for use on a bicycle having a fixed shaft, a drive member and a hub body rotatably supported on the fixed shaft, and a change speed device disposed between the drive member and hub body. The change speed device includes a plurality of clutches and a clutch controller. The clutches are subjected to a resistance to disengagement corresponding to a drive torque. The clutch controller includes a shiftable first control member, a spring for storing a shift of the first control member as energy, and a shiftable second control member operable by the spring for operating the clutches. The second control member shifts to disengage the clutches when the first control member shifts and the spring imparts a force greater than the resistance to disengagement for shifting the second control member.
    Type: Grant
    Filed: August 30, 1993
    Date of Patent: June 21, 1994
    Assignee: Shimano, Inc.
    Inventor: Masashi Nagano
  • Patent number: 5312166
    Abstract: A quick release mechanism for tightening a hub assembly having a tubular shaft between prongs of a bicycle frame fork. This mechanism includes a tightening rod extending axially through the tubular rod, a first clamp and a second clamp mounted on the tightening rod, and a control lever mounted on the tightening rod for moving the clamps between a tightening position and a release position. This mechanism further includes a device for indicating that the tightening force applied from the first and second clamps exceeds a predetermined value. The indicating device includes a shift member shiftable between a first position and a second position, a receiving member for receiving the tightening force from the clamps through the frame fork, an interlocking member for shifting the shift member to the second position when the receiving member receives a force exceeding the predetermined value, and a spring for urging the shift member to the first position.
    Type: Grant
    Filed: August 10, 1992
    Date of Patent: May 17, 1994
    Assignee: Shimano Inc.
    Inventor: Masashi Nagano
  • Patent number: 5307706
    Abstract: A speed control apparatus for a bicycle for selecting a speed position from a plurality of speed positions based on a wire winding amount. This apparatus includes a fixed element, a displaceable control lever, a takeup element pivotally supported by the fixed element for winding a wire, the takeup element being rotatable to rotate the takeup portion by the displacement of the control lever in a wire winding direction to select one of the speed positions, and a position setting mechanism disposed between the control lever and the fixed element. The position setting mechanism includes a clutch pawl and clutch teeth. The clutch pawl is movable between an engaging position to engage the clutch teeth and a retracted position away from the clutch teeth. The takeup element is retained in a selected speed position by the clutch pawl engaging one of the clutch teeth.
    Type: Grant
    Filed: March 30, 1992
    Date of Patent: May 3, 1994
    Assignee: Shimano Inc.
    Inventor: Masashi Nagano
  • Patent number: 5293965
    Abstract: A bicycle brake mechanism includes a brake operating lever, a first and a second brake calipers pivotably supported on a bicycle frame, a control cable having one end thereof connected to the brake operating lever, and the other end connected to the first brake caliper, a connecting element for engaging the control cable to be movable along the control cable, a tension element for interconnecting the second brake caliper and the connecting element, and a supporter disposed between the connecting element and the first brake caliper for maintaining a predetermined distance between the connecting element and a point at which the first brake caliper engages the control cable.
    Type: Grant
    Filed: August 24, 1992
    Date of Patent: March 15, 1994
    Assignee: Shimano Inc.
    Inventor: Masashi Nagano
  • Patent number: 5288278
    Abstract: A bicycle chain having link plates connected to be oscillatable relative to one another within a predetermined range of flexion. To determine the range of flexion, outer link plates include engaged members, and inner link plates include engaging members for engaging the engaged members. A maximum range of flexion of the chain is determined by contact between the engaged members and engaging members. This maximum range of flexion is determined to enable the chain to be wound around the smallest pulley of a speed changer or derailleur.
    Type: Grant
    Filed: December 30, 1991
    Date of Patent: February 22, 1994
    Assignee: Shimano Inc.
    Inventor: Masashi Nagano
  • Patent number: 5287766
    Abstract: A bicycle speed control apparatus attached to a handlebar having a grip. This apparatus comprises a bracket fixed to the handlebar and having an extension extending away from the handlebar; a support shaft attached to the extension and extending substantially perpendicular a direction in which the grip extends; a shift lever having a control knob provided in a distal end region thereof; and a control device for controlling a change speed wire based on a pivotal displacement of the shift lever. The shift lever is pivotable about the support shaft and has a range of pivotal movement such that a tangent to a substantial locus of movement of the control knob approximates the direction in which the grip extends. This locus of movement is substantially within a width of the grip as seen from an end face of the support shaft. Consequently, the control knob is maintained at a substantially constant short distance to the grip throughout the range of pivotal movement of the shift lever.
    Type: Grant
    Filed: April 16, 1992
    Date of Patent: February 22, 1994
    Assignee: Shimano Inc.
    Inventor: Masashi Nagano
  • Patent number: 5273500
    Abstract: A self-contained change speed apparatus for use on a bicycle having a drive member and a hub body rotatably supported on a fixed shaft, and two planetary gear mechanisms arranged on a drive transmission path extending from the drive member to the hub body. The planetary gear mechanisms include planet gears meshed with sun gears switchable through externally controllable one-way clutches between a state of free rotation relative to the fixed shaft and a state of being locked to the fixed shaft. The controls of the one-way clutches acting on the sun gears are effected by relative positional relations between projections formed on the fixed shaft and control sections formed on a control member shiftable on peripheral surfaces of the fixed shaft. Such controls of the sun gears determine an output line extending through one of the two one-way clutches.
    Type: Grant
    Filed: December 19, 1991
    Date of Patent: December 28, 1993
    Assignee: Shimano, Inc.
    Inventor: Masashi Nagano
  • Patent number: 5273495
    Abstract: A multistage front gear apparatus for a bicycle having a device for restoring a chain having fallen off which includes a shelf portion (51) extending axially of the rotary shaft, a chain engaging portion (52) extending from a free end region of the shelf portion radially outwardly of the rotary shaft, and a guide portion (53) disposed peripherally of the shelf portion for guiding the chain away from the chain engaging portion. The chain engaging portion (52) has opposite edges in a rotating direction extending substantially at right angles to the shelf portion. The guide portion (53) is formed on peripheral side surfaces of the shelf portion, and includes inclined guide surfaces extending from positions of connection to the chainwheel to peripheral regions of the shelf portion.
    Type: Grant
    Filed: April 30, 1992
    Date of Patent: December 28, 1993
    Assignee: Shimano, Inc.
    Inventor: Masashi Nagano