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Masashi Nagano Patents
Inventor:
Nagano; Masashi
Address:
Izumi, JP
No. of patents:
207
Patents:


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Patent Number Title Of Patent Date Issued
RE32924 Derailleur for a bicycle May 16, 1989
A derailleur for a bicycle comprises; a fixing member; a transformable linkage mechanism comprising a base member, two linkage members and a movable member; and a chain guide having a guide pulley and a tension pulley. The linkage mechanism is supported swingably to the fixing member
RE32059 Rear derailleur and control wire guide December 31, 1985
A speed-changing device for a bicycle, having a pantograph mechanism which comprises four members, a supporting member, two linkage members, and movable member, is pivoted through a horizontal spindle swingably to a bracket fixed to a fork end of the bicycle. A wire holder for securing o
RE31796 Derailleur for bicycles and similar vehicles January 8, 1985
A derailleur serves to change the speed of a chain driven vehicle by moving a change-over frame having a tension and a guide pulley, the change-over frame being formed of a single plate and provided with a chain holder positioning radially outwardly of the guide pulley and keeping engage
RE30524 Derailleur for a bicycle February 24, 1981
A derailleur for a bicycle, which comprises four members, including a fitting member, two linkage members and a movable member, all movable with respect to each other. Between two of the members there is a device for positioning cages having chain-guide pulleys mounted on the movable
7104908 Rear derailleur September 12, 2006
A rear bicycle derailleur includes a base member, a movable member, a guide arm and a tension arm. The base member is adapted to be mounted to a bicycle frame. The movable member is movably coupled to the base member, preferably via a linkage, to move between a retracted position and
6128973 Bicycle pedal system having variable tread surfaces October 10, 2000
A bicycle pedal system with adaptable pedal thread surfaces includes a pedal (3) having a first tread surface (4) and an adapter (5) attachable to the first tread surface. The adapter defines a second tread surface (7) opposite to a surface thereof facing the first tread surface when the
6089122 Connecting structure between bicycle pedal and cleat, bicycle pedal and cleat July 18, 2000
A connecting structure between a bicycle pedal and a cleat, comprising hooks pivotably supported by a pedal body for engaging and releasing the cleat, and an urging device for urging the hooks toward engaging positions. The object is to allow the cleat to be released with increased r
5979266 Brake control apparatus for bicycle November 9, 1999
A brake control apparatus for a bicycle. The appratus has a control lever operatively connected with a control cable for pulling the cable and a force transmission ratio adjuster mechanism for adjusting a force transmission ratio in association with an operation of the control lever.
5855147 Connecting structure between bicycle pedal and cleat, bicycle pedal and cleat January 5, 1999
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
5806379 Bicycle pedal system having variable tread surfaces September 15, 1998
A bicycle pedal system with adaptable pedal tread surfaces includes a pedal (3) having a first tread surface (4) and an adapter (5) attachable to the first tread surface. The adapter defines a second tread surface (7) opposite to a surface thereof facing the first tread surface when the
5699699 Connecting structure between bicycle pedal and cleat, bicycle pedal and cleat December 23, 1997
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
5557985 Bicycle cleat coupling structure September 24, 1996
An apparatus for coupling a cleat has a pedal shaft for rotatably supporting a pedal, a tread surface extending parallel to the pedal shaft for contacting a bottom of a shoe, a first pivotal axis provided on the pedal, and a first cleat clamp pivotable about the first pivotal axis. The
5537891 Bicycle brake lever mechanism July 23, 1996
A bicycle brake lever mechanism having a bracket mountable to a bicycle handlebar, a lever mounted for pivotal movement to the bracket and a brake cable connector connected to the lever. The cable connector is connected to the lever via an adjusting mechanism for so that the return posit
5522282 Connecting structure between bicycle pedal and cleat, bicycle pedal and cleat June 4, 1996
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
5505111 Connecting structure between bicycle pedal and cleat, bicycle pedal and cleat April 9, 1996
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
5497680 Apparatus for securing a shoe to a bicycle pedal March 12, 1996
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 sh
5447362 Quick release apparatus for a bicycle September 5, 1995
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
5446977 Cycling shoe having a sole with a removable portion September 5, 1995
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 overlap
5413534 Chain shift aiding structure for bicycle sprocket May 9, 1995
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
5400675 Bicycle control device March 28, 1995
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
5390767 Brake caliper support structure for a bicycle February 21, 1995
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
5379665 Bicycle pedal January 10, 1995
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 attach
5373918 Clamp structure for connecting a brake control cable to a brake caliper December 20, 1994
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 attache
5330220 Apparatus for rotatably fitting a fork stem in a head tube of a bicycle July 19, 1994
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 th
5326157 Wheel mounting apparatus for a bicycle July 5, 1994
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,
5325735 Bicycle speed control apparatus having a speed indicator July 5, 1994
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
5322487 Self-contained change speed apparatus with shaped pawls to equalize a shifting spring force for June 21, 1994
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
5312166 Quick release mechanism having a tightening force indicator May 17, 1994
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
5307706 Speed control apparatus for bicycle having a sound producing device May 3, 1994
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,
5293965 Bicycle brake March 15, 1994
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 elem
5288278 Bicycle chain February 22, 1994
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.
5287766 Speed control apparatus for a bicycle February 22, 1994
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
5273500 Self-contained change speed apparatus for use on a bicycle and having a planetary gear mechanism December 28, 1993
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
5273495 Front gear for bicycle with chain restoring device December 28, 1993
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
5272936 Bicycle headset December 28, 1993
A headset for rotatably attaching a fork stem to a head pipe of a frame of a bicycle or the like. The headset includes an inner tube fitted on an outer surface of the fork stem, an outer tube coaxially surrounding the inner tube and fitted in an inner surface of the head pipe, and a ball
5257855 Quick release apparatus having a lock mechanism November 2, 1993
A quick release apparatus for a bicycle includes a first clamp (6) mounted on one end of a drawbar (5) for acting on a bicycle frame (10), and a second clamp (9) mounted on the other end of the drawbar (5) for cooperating with the first clamp (6) to hold the frame (10) tightly thereb
5257562 Bicycle crank mechanism November 2, 1993
A crank mechanism for a bicycle includes a crank axle, a crank arm rotatable with the crank axle, a pedal shaft attached to the crank arm, and a pedal rotatably supported by the pedal shaft. The pedal is also movable to and fro relative to and in directions perpendicular to the pedal
5246405 Front derailleur for a bicycle September 21, 1993
A bicycle front derailleur has a guide assembly for shifting a chain among a plurality of sprockets of different sizes. The guide assembly comprises an outer guide plate, an inner guide plate extending substantially parallel to the outer guide plate, and bridge members interconnecting th
5243879 Crank axle unit for a bicycle September 14, 1993
A crank axle unit mounted in a bottom bracket assembled to a bicycle frame, which crank axle unit has a tubular element surrounding and rotatably supporting a crank axle, the tubular element being surrounded by the bottom bracket, and a first screw ring and a second screw ring screwed
5241878 Bicycle control device September 7, 1993
A control device attachable to the handlebar of a bicycle for controlling a brake mechanism and change 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 a
5222412 Change speed lever apparatus for use in bicycle June 29, 1993
A change-speed lever apparatus for use on a bicycle, comprises: a fixed member; a winding member pivotably supported to the fixed member and urged toward a cable-winding direction, the winding member winding a change-speed cable; a control lever operable to pivot the winding member o
5217413 Gear crank apparatus for a bicycle for supporting a plurality of chainwheels June 8, 1993
A gear crank apparatus for a bicycle for supporting a plurality of chainwheels. This apparatus includes a boss secured to an end of a crank axle, a chainwheel supporting member extending radially outwardly from the boss for supporting the chainwheels axially spaced apart from one another
5213005 Speed control device for bicycle derailleur May 25, 1993
A control device for a bicycle derailleur that includes a fixing member, control structure for effecting a change speed, a reciprocating member reciprocatably supported by the fixing member and operatively connected to the derailleur to be movable between a forward direction for shifting
5209581 Crank arm mounting apparatus for a bicycle May 11, 1993
A crank shaft unit for rotatably mounting bicycle crank arms in a bottom bracket includes, and adapters for maintaining the crank shaft unit in position relative to the bottom bracket. The crank shaft unit includes a crank shaft having connecting projections formed at opposite ends there
5203213 Bicycle speed control apparatus April 20, 1993
A speed control apparatus for a bicycle includes a support shaft fixed to a bracket mounted on a handlebar; a first control lever pivotable about the support shaft and retainable in position after pulling a change speed wire to effect a change speed operation, the first control lever bei
5201236 System for amplifying manual operating force transmitted to a functional device of a bicycle April 13, 1993
A roller intake mechanism having an operating force amplifying device includes a cam (7) rotatable about an axis of an axle a plurality of rollers (8) displaceable with rotation of the cam, a roller case (9) for displaceably retaining the rollers, a brake drum (5) extending from a wh
5195397 Bicycle pedal having two surfaces for fixing a cleat March 23, 1993
A bicycle pedal (2) pivotally supported and having a first cleat coupling device (100) and a second cleat coupling device (200) disposed on opposite surfaces of the pedal. Each of the cleat coupling devices includes a front hook assembly for engaging a front section of the cleat, a rear
5194051 Sprocket wheel mounting unit for a bicycle March 16, 1993
A multistep sprocket wheel unit having a plurality of sprocket wheels in ring form; a boss having an axis, a front end face and a rear end face; and a plurality of support arms extending radially outwardly from outer peripheries of the boss and inclined toward the rear end face with resp
5192249 Multi-stage sprocket assembly for bicycle March 9, 1993
A multi-stage sprocket assembly for a bicycle is disclosed. In the assembly, a concave portion is provided in a small-sprocket-side face of a large sprocket for avoiding interference with a drive chain disengaged from a height-reduced tooth of the large sprocket, such that a link-con
5192248 Multi-stage sprocket assembly for bicycle March 9, 1993
A multi-stage sprocket assembly for a bicycle has a small sprocket, a large sprocket disposed coaxially with the small sprocket and a shift assist projection provided to the large sprocket for assisting a shifting movement of a chain from the small sprocket to the large sprocket. The
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