Matches 1 - 50 out of 67 1 2 >
Match Document Document Title
7350796 Crank apparatus for bicycles and the like  
A crank apparatus includes a driven member rotatably mounted to a machine, and a crank arm attached at an inner end thereof to the driven member at a rotational axis of the driven member such that...
7226394 Rotary rehabilitation apparatus and method  
A rotary rehabilitation apparatus for rehabilitation of a person's extremity, including the joints and assorted muscles, tendons, ligaments, that can be tailored to the person's needs based upon...
7093516 Simple, compact and effective self-extending and retracting bicycle crank arm  
This invention is a bicycle crank and pedal assembly with a self-extending and retracting crank arm. The assembly only has three one-piece components that move relative to each other, if the...
7017444 Transmission for a bicycle pedal  
A transmission for a bicycle pedal has a fixed axle with an end operatively connected to a wheel of the bicycle and a guide axle connected to the fixed axle to form a crank. A bicycle pedal is...
7007570 Pedal crank mechanism for bicycle  
A bicycle crank mechanism comprises a main crank, a follower crank, and a connecting lever disposed between free ends of the main and follower cranks. A second fixed fulcrum shaft of the follower...
6895834 Adjustable crank for bicycles  
A crank arm of a bicycle having an effective crank arm length that can be selectively adjusted for increasing the comfort and performance of the rider. The crank arm includes a crank arm member...
6837822 Structure of gear cluster for a bicycle  
An improved structure of a gear cluster for a bicycle having a crankset mounted with a crankshaft provided with a planetary gear module, wherein the planetary gear module includes a big wheel and a...
6820517 Pedal crank  
The pedal crank of the present invention includes a cam having a channel therein, a hub fixed to the shaft of the exercise machine, an arm operable with a cam follower and a pair of rods. The arm...
6796200 Multi speed bicycle transmission including eccentric cranking assembly  
A bicycle transmission has a plurality of cone gears with multiple gear surfaces and a corresponding plurality of ratio-change assemblies for selecting one of the gear surfaces of each cone gear....
6640662 Variable length crank arm assembly  
A variable length crank arm assembly ( 10 ) is disclosed which is mounted to a bicycle ( 11 ). The crank arm assembly ( 10 ) has a pair of oppositely disposed crank arms ( 25 ) each having a boss (...
6607326 Planetary sphere/ring gear  
A planetary sphere/ring gear, comprising a sphere and a ring, which are interconnected by a ball and a socket. The ball is located on the edge of a circular opening in the ring and the socket is...
6589139 Exercise and rehabilitation equipment  
A cycle (or an adaptation for a cycle) comprises a primary crank arranged for rotation about a first axis, a secondary crank, and connection means for selective connection of the secondary crank to...
6508146 Pedal driving mechanism of bicycle  
A pedal driving mechanism for a bicycle which contains structurally improved pedal arms on which pedals are installed to increase the rotary radius of the pedals during the running of the bicycle...
6487933 Pedal-operated drive unit for bicycles or the like  
The unit comprises two variable-length pedal cranks ( 20 ) having a common rotation pin ( 21 ) of transverse axis (A), and a mechanism ( 34, 35, 36 ) for varying the length of the two pedal cranks...
6341946 Continuously adjustable telescopic pedal crank length  
A apparatus for gearless shifting, includes at least one crank, and an arm assembly, coupled to the at least one crank, for telescoping to adjust a length of the at least one crank, to selectively...
6253639 Extensible crank  
An apparatus for translating a radial force applied to a crank into additional rotary motion by a crankshaft is described as including a crank mechanically coupled to the crankshaft that is adapted...
6152471 Variable pedal driving device of bicycle  
A variable pedal driving device for a bicycle, the device allowing the bicycle pedals to slide along crankshafts during operation of the device. Each pedal is coupled to a slide pipe slidably...
6050154 Bicycle pedal  
An improved bicycle pedal is provided in which a sleeve is additionally installed at the lower extent of the pedal body, with a locating pin inserted through the sleeve and capable of freely...
5899119 Bicycle crank assembly  
A bicycle having a crank assembly for driving the sprocket and chain assembly of the bicycle. The crank assembly includes a hub mounted to the frame of the bicycle so as to be rotatable at least in...
5879017 Pedaling efficiency  
A new bicycle with improved pedaling efficiency for allowing a length of crank arms to change during pedaling. The inventive device includes a pair of crank shafts secured to opposing ends of an...
5653150 Pedalling device with suspension for cycles  
A pedalling device, notably usable for all-surface bikes, comprises a pair of cranks in mechanical connection with a crank-gear spindle, and actuating means able to occupy a first pedalling state...
5636554 Variable length crank arm  
A variable length crank arm assembly for transferring energy to the power train of a bicycle, the assembly including a primary crank arm attached to a secondary crank arm by a rotatable coupling....
5571056 Derailleur cable collet  
The derailleur cable-collet system is an automatic pedal-rate to wheel-rate adjusting system. Pedal pressure is sensed at the crankshaft hub and electronically compared to pedal-pressure threshold...
5566590 Crank device  
A crank device can produce a large torque without increasing the locus of the crank arm. The crank arm has first and second arms which are longitudinally slidably coupled together through a pinion....
5553515 Bicycle pedal  
A device attached to a crank arm of, for example, a bicycle, which increases the effective crank length through the power phase of the crank arm stroke using rotary motion. The maximum effective...
5442972 Variable ratio bicycle drive mechanism  
A variable ratio bicycle drive mechanism has particular advantages for use in the drive train of an off-road bicycle but has application in human powered vehicles generally. The mechanism provides...
5324241 Knee rehabilitation exercise device  
A pedal crank has a throw adjuster comprised of two triangular frames in opposed relationship to a common triangular base that is variable in length. A pedal crank is formed with a peak of a...
5301571 Automatic speed gear for bicycles  
The present invention relates to an automatic speed gear for bicycles or the like, of the type comprising a pinion assembly, each pinion having a different number of teeth, the pinions being...
5261294 Adjustable elliptical crank mechanism  
A crank mechanism is provided which has a first driven member constituted by a first shaft, and a second driven member constituted by a sleeve member-disposed around said first shaft. The sleeve...
5257562 Bicycle crank mechanism  
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...
5207119 Pedal mechanism for a human propulsion vehicle  
A pedal mechanism for a human propulsion vehicle such as a bicycle wherein the length of each of the pedal arm is increased during the power stroke and decreased during the return stroke of the...
5199324 Adjustably variable pedal apparatus and method  
A pedal assembly for bicycles, velocipedes, and the like is disclosed wherein the pedal is adjustably attached to the crank arm at a predetermined angle of inclination to or perpendicular to the...
5188003 Power assist device for a drive mechanism  
A power assist device for use with a crank-operated drive mechanism including a pair of crank arms extending from opposite ends of a shaft mounted for rotation on a frame. The crank arms rotate the...
5157988 Elastic crank for bicycles  
A device for absorbing energy from a bicyclist's foot on the downward pedal stroke and releasing it shortly afterward into the drive chain to propel the bicycle is disclosed. The energy is stored...
5142937 Driving apparatus with a speed changer for a bicycle  
A driving apparatus with a speed changer for a bicycle using a pair of non-circular gears for performing an exponential function angular velocity modulation for the speed changer. The driving...
5125288 Arcuate bicyle crank lever apparatus  
An apparatus wherein diametrically opposed crank lever members are mounted to a central sprocket pin whose arc is defined by a first diameter substantially equal to one-half of a spacing between...
5121654 Propulsion and transmission mechanism for bicycles, similar vehicles and exercise apparatus  
Apparatus of dual partially independent mechanism to propel bicycles or other vehicles, having a bottom bracket shell attached to a frame, a pair of main shafts mounted separately in said bottom...
5095772 Bicycle pedal extension  
A pedal apparatus operatively connectable for powering a bicycle or the like vehicle comprising an axle rigidly affixed to the vehicle frame and independently rotatable left and right pedal hubs...
5070744 Structure of bicycle chain transmission  
A bicycle chain transmission, comprising a pedal link adjustably fastened in a holder plate mounted on the outer side of a chain wheel and connected with a side projection of a bearing block which...
5067370 Variable crank pedal drive for bicycles and the like  
A drive system for driving any driven device, such as the rear wheel of a bicycle or the like, comprising a pair of oppositely-directed input torque crank arms supported for independent rotation...
5060536 Flexible crank drive  
A bicycle crank has flexible crank arms designed to deflect elastically under the influence of force on the pedals, allowing the point of application of force to advance relative to the rotational...
4960013 Bicycle crank assembly  
A bicycle foot pedal crank arm construction that provides a relatively long lever arm between the foot pedal and crank arm rotational axis during the power stroke; during the return stroke...
4915374 Recumbent exercise cycle with articulated pedals  
A recumbent exercise cycle comprises a pair of pedals and a seat which are each individually adjustable relative to a crankshaft that is rotatably mounted on the frame of the exercise cycle. In...
4882945 Pedal extension device  
A simple improved rotary to linear motion mechanism for increasing the pedal leverage on a bicycle using a telescoping pedal support arm and a rotating crank-disc engaging a coupling connecting rod...
4881732 Exercise device  
An exercise device is provided with a frame. Two pedal structures are mounted on the frame. One pedal structure is to be driven by one's legs and the other pedal structure is to be driven by one's...
4872695 Torque-multiplying kinematic device particularly for bicycles and bicycles employing said kinematic device  
A torque-multiplying kinematic device for use on a traditional rear wheel chain driven bicycle includes a pair of rods, each rod consisting of a foremost portion inclined from a rearmost portion, a...
4816009 Power transmission system particularly useful for bicycles  
A power transmission system particularly useful for a foot-operated bicycle comprises a pair of axle sections coaxially-mounted with respect to each other, each fixed to one of the crank arms and...
4807491 Pedal crank as well as a pedal crank drive for bicycles or the like and a mounting for such a pedal crank drive  
The invention concerns a pedal crank as well as a pedal crank drive built up from it for bicycles or the like, in which the effective length of the pedal crank may be altered during the course of...
4793208 Crank-gear for bicycle or similar locomotion vehicle  
This crank-gear includes cranks centered on a first axis and respectively mounted on shafts journalled into one another in the bicycle crank-gear case. Each shaft bears a guide cooperating with...
4706516 Pedal mechanism for a bicycle having the pedal crank radially movable therein  
This invention relates to a pedal mechanism for a bicycle with variable leverage pedal cranks. Two guide pulley assemblies fixedly mounted on the frame of a bicycle each comprise two relatively...
Matches 1 - 50 out of 67 1 2 >