Showing papers on "Drive wheel published in 1992"

Controller for manipulation of instruments within a catheter

Abstract: A controller for moving an elongated medical instrument in a catheter comprising a supporting structure including a mounting section adapted to be coupled to a catheter and a drive section. The controller also includes a drive wheel and a secondary wheel with each of the wheels having a peripheral surface. Each of the peripheral surfaces has an instrument groove portion. One of the wheels has a circumferential recess in its peripheral surface and the other of the wheels provides a circumferential projection. The wheels are rotatably mounted on the drive section with the peripheral surfaces in generally confronting relationship and with the projection in the recess to align the wheels and to maintain the wheels in alignment as the wheels rotate. The instrument groove portions are in confronting relationship to provide an instrument groove which is sized and adapted to receive an elongated medical instrument.

Drive unit for electric motor vehicle

Abstract: A drive unit for an electric motor vehicle includes first and second electric motors having characteristics which achieve high efficiencies in different operational regions. A common motor shaft receives output torques from both of the first and second motors, which output torque are then transmitted to a drive wheel. Sensors are provided for sensing a travelling condition of the vehicle and the rotational speeds of the first and second motors. Request torque, i.e. that torque required for the travel of the vehicle, is determined in accordance with the detected travelling condition of the vehicle. The determined request torque is distributed to the first and second motors in accordance with the detected rotational speeds to govern the output torques of the first and second motors.

Tensioning and suspension system for a tracked vehicle

Abstract: The invention is directed to a hydraulic tensioning and suspension system having a main drive wheel located above and between two idlers that are mounted to pivot arms that are coupled to a rigid frame. In addition, two track rollers are mounted to the rigid frame by an intermediate arm and a third track roller is mounted to the front pivot arm by an additional pivot arm. Four hydraulic suspension cylinders are hydraulically coupled to one another for biassing the idlers and track rollers downwardly to provide a suspension system. The rear pivot arm is a telescoping arm having a hydraulic tensioning cylinder. A two position control valve supplies hydraulic fluid to the hydraulic tensioning cylinder in response to a speed ratio selected by the operator. With higher tension being applied to the track when the vehicle transmission is in low gear and lower tension is being applied to the track when the vehicle transmission is in higher gears.

Drive wheel for a belted track crawler

Abstract: The invention is directed to a drive wheel for a belted track crawler having circumferentially spaced frictional engagement elements. Adjacent frictional engagement elements define circumferential gaps in the wheel for removing mud and debris from the track wheel interface. Furthermore the frictional engagement elements are detachably mounted to mounting plates on the wheel hub.

Vehicle with combined propulsion and steering mechanism

Abstract: The rider powered vehicle has two steerable front wheels, each with a turning arm, and a single rear drive wheel. Power transmission means is provided between the rear wheel and a single push-pull and steerable handlebar mounted in a column assembly supported to oscillate about a lateral pivot axis. The handlebar is connected to a steering arm, and two steering links are connected at respective inboard and outboard pivotal connections between the steering arm and the two turning arms. Handlebar rotation causes the inboard pivotal connections to trace an arcuate path, and the lateral pivot axis is located to intersect the arcuate path generally at two spaced locations. This geometry provides a propulsion and steering mechanism that has substantially no interaction between the push-pull power strokes of the handlebar, for vehicular propulsion, and the handlebar rotation, for vehicular steering.

Rotation transmitting mechanism

Abstract: A rotation transmitting system comprises drive and driven wheels mounted on a stationary hub for rotation about a common axis. Radially spaced surfaces on the hub and driven wheel form a space in which clamping bodies are mounted. The space includes wedge portions in which the bodies are disposed, and a spring biases the bodies in a locking direction whereby the bodies prevent rotation of the driven wheel in respective directions of rotation. The drive wheel carries a claw member which forces a respective body out of its locking position when the driven wheel is rotated in either direction, thereby unlocking the driven wheel for rotation. A lost-motion connection between the drive and driven wheels connects those wheels for common rotation after the driven wheel has been unlocked.

Multiple-degree-of-freedom vehicle

Abstract: A multi-degree-of-freedom vehicle employs a compliant linkage to accommodate the need for a variation in the distance between drive wheels or drive systems which are independently steerable and drivable. The subject vehicle is provided with rotary encodes to provide signals representative of the orientation of the steering pivot associated with each such drive wheel or system, and a linear encoder which issues a signal representative of the fluctuations in the distance between the drive elements. The wheels of the vehicle are steered and driven in response to the linear encoder signal, there being provided a controller system for minimizing the fluctuations in the distance. The controller system is a software implementation of a plurality of controllers, operating at the chassis level and at the vehicle level. A trajectory interpolator receives x-displacement, y-displacement, and θ-displacement signals and produces to the vehicle level controller trajectory signals corresponding to interpolated control signals. The x-displacement, y-displacement, and θ-displacement signals are received from a human operator, via a manipulable joy stick.

Stroke-piston IC engine with two gas exchange valves per cylinder

Abstract: An adjuster consists of a positioning bolt (30) displaceable in the shaft longitudinal direction (4), and connected via inclined teeth (31,32) with at least one of the crankshafts (20) and at least one of the camshaft drive wheels. The adjustment component can be a positioning bolt displaceable in the shaft longitudinal direction, and which is connected with a camshaft drive wheel and with the camshafts via inclined teeth of differing pitch. The camshafts (10,20) of the parallel acting cams (11,12) are arranged concentrically to each other and the positioning bolt (30) and the camshaft drive wheel (15) are arranged concentrically to the camshafts.

Wheelchair cycle apparatus

Abstract: A wheelchair cycle apparatus that includes a frame to which is attached a connecting device for connecting the frame to a wheelchair. A drive wheel and driven wheel are attached to the frame. A pair of pedals are attached to either the drive wheel or the driven wheel depending upon whether the user can move his/her own legs. A chain connects the drive wheel to the driven wheel. The wheelchair cycle apparatus may be connected to the frame of a wheelchair to produce a wheelchair assembly that enables a disabled individual to exercise his/her own legs while seated in the wheelchair.

Leg mobilized attachments for wheelchairs

Abstract: Leg-powered, foot-steerable devices for attachment to a wheelchair are disclosed that include a longitudinal pole unit, attachment clamps for releasably mounting the pole unit upon the frame of the wheelchair and a wheel assembly that includes a bearing unit carried by the pole unit, a pillar assembly carried by the bearing unit for limited rotation about a steering axis, an axle supported by the pillar assembly, at least one drive wheel carried by the axle for free rotation thereon and for limited rotation with the pillar assembly about the steering axis, and a pair of peddles fixed by opposed crank arms on opposite sides of the drive wheel for simultaneous rotation thereof by the feet of the wheelchair user about the steering axis and the axle.

Manual powered lawn mower

Abstract: A manual powered lawn mower comprises a pair of large diameter drive wheels on an axle, two clutch and roller bearing mechanisms on the axle coupling the drive wheels thereto, a gear mechanism coupled to the axle for translating rotation of the drive wheels to rotation of a gear around a vertical axis, and a rotary type blade which is coupled to the gear mechanism via a vertical axle and another clutch and roller bearing mechanism When the lawn mower is pushed forward, the clutch and roller bearing mechanisms on the wheel axle causes the axle to drive the gear mechanism, which in turn drives the vertical axle and the blade When a drive wheel is not turning the axle faster than the speed that the axle is turning, that drive wheel is decoupled by the clutch and roller bearing mechanism and no longer adds either power or drag to the system With clutch and roller bearing mechanisms on each wheel, a "differential" is provided which permits maneuverability without adversely affecting blade speed The clutch and roller bearing mechanism coupling the blade to the vertical axle permits the vertical axle to drive the blade provided the vertical axle is rotating as fast as the blade, but permits the blade to spin unimpeded otherwise Numerous blade arrangements are provided, including inertial blades which ease lawn mower start-up, and different attachment modules are provided which convert the mower into a sweeper, mulcher, lawn edger, lawn thatcher, etc

Pipe turning tool

Abstract: A tool for turning an elongate pipe is disclosed. The tool comprises a base and a drive wheel mounted for rotation on the base. The drive wheel has a cylindrical outer surface may include a plurality of projections extending radially outward from the outer surface of the first drive wheel. The projections extend past the edge of the base. In use, the projections contact a portion of the outer surface of an elongate pipe and turn the pipe with the rotation of the drive wheel. A guide is also mounted for movement on the base. The guide may be a pair of guide arms pivotally mounted on the base. Each guide arm has a free end and a guide roller is mounted for free rotation at each free end of each guide arm. Each guide arm is pivotable to a position wherein the guide rollers hold the elongate pipe against the projections on the outer surface of the first drive wheel. The guide may also be an L-shaped guide arm with a free leg carrying guide rollers to hold the elongate pipe against the projections on the outer surface of the drive wheel. The drive wheel may be driven by a motor, such as a hydraulic motor.

Drive wheel suspension system for a motorcycle

Abstract: The present invention discloses a drive wheel suspension system for a motorcycle wherein the drive wheel has freedom of motion in any direction, within it's plane of rotation. The wheel is risiliently connected to the main chassis through two swing arms and power is transmitted through a manipulated single loop drive.

Actuator, particularly for controlling a drive transmission of a bicycle

Abstract: An actuator with an electric motor (3b), in particular for controlling a drive transmission of a bicycle, is proposed, which actuator drives a power-output element (7b) via two transmission stages (13b, 15b). The two transmission stages (13b, 15b) have a common sun wheel (17b) which can be rotated on an axle (11b) and a common hollow wheel (23b) which can be rotated in relation to the sun wheel (17b). The electric motor (3b) directly drives a drive wheel (29b) which intermeshes with the sun wheel (17b) and the hollow wheel (23b). The power-output element (7b) is driven by a planetary wheel carrier (37b) whose planetary wheels (33b) also intermesh both with the hollow wheel (23b) and with the sun wheel (17b). The limb diameter of the planetary wheels (33b) is slightly larger, with corresponding matching of the limb diameters of the sun wheel or hollow wheel toothings, than the limb diameter of the drive wheel (29b). In this way, a high speed of rotation of the electric motor (3b), preferably constructed as a miniature DC motor, can be converted into a slower speed with a very high transmission ratio. The actuator is very compact and is particularly suitable for installation in a transmission drive hub of a bicycle, completely inside a hub sleeve (53) of the drive hub.

Track laying vehicles

Abstract: A track assembly suitable for use with a track laying vehicle The pitch of the drive members (7) on the drive wheel (5) is different to the pitch of the transmission elements (11) of that section of the belt which is in engagement with the drive wheel (5) such that the maximum transmission force applied to the belt by the drive wheel (5) is at that section of the belt in engagement with the drive wheel (5) in the region where the belt leaves the drive wheel (5) One form of the drive wheel (5) comprises a hub, spaced apart outer rim sections (65) and a plurality of drive members (7) extending between the rim sections (65) The outer rim sections (65) and/or the drive members (7) include a rotatable belt contact surface portion (88, 89, respectively) which in use engage a belt or track of the track assembly

Power driven wheel barrow

Abstract: A power driven wheel barrow includes a pair of frame members, the pair of frame members being connected at a front portion thereof, a drive wheel rotatably mounted at the front portion of the frame members, a motor for providing rotational motion to a first shaft about an axis having a direction substantially normal to a direction of an axis of rotation of the drive wheel, a sealed gear box for converting the rotational motion provided by the first shaft to a direction substantially parallel to the direction of rotation of the drive wheel and outputting the converted rotational motion and a roller for selectively engaging and disengaging the rotational motion output by the sealed gear box to and from the drive wheel.

Robotic vehicle having flexible chassis

Abstract: An automotive truck for moving a robot along a surface comprises a chassis and at least one platform hingedly connected to the chassis at one end of the platform. A drive wheel is rotatably mounted to the platform. A spring is connected at an opposite end of the platform pressing the drive wheel against the surface.

Vertically pivotal security gate

Abstract: A security gate system including a supporting structure and a gate mounted on the supporting structure for pivotal movement about a generally horizontal pivot axis between a closed position and an open position. A drive wheel is rotatably mounted on the supporting structure and is drivingly coupled to the gate so that rotation of the drive wheel in a gate opening direction drives the gate from the closed position to the open position. A first motor drives the drive wheel and a releasable lock releasably holds the drive wheel against rotation in the gate opening direction. A second motor moves a locking member of the releasable lock to a releasing position to allow the gate to be moved to the open position. The gate system may include two of the gates having operators sharing the same supporting structure.

Drive wheel torque controlling system for vehicle

Abstract: A drive wheel torque control system for a vehicle includes control means for controlling a variable differential motion limiting device (2) provided between drive wheels to distribute a predetermined LSD torque from a racing drive wheel to a non-racing drive wheel The control means includes vehicle speed determining means for determining a vehicle speed from a follower wheel speed (9,10), drive wheel speed determining means (11,12) adapted to select a smaller one of the drive wheel speeds as a drive wheel speed, when the inner-side wheel in turning movement is racing, and to select a larger one of the drive wheel speeds, when the outer-side wheel in turning movement is racing, and torque determining means for determining the LSD torque from the vehicle speed and the drive wheel speed This ensures that only when the inner wheel is racing, the smaller one of the drive wheel speeds can be selected, and an LSD torque can be distributed to the outer wheel, thereby easily effecting the adjustment of the locus of turning movement of the vehicle when the inner wheel is racing, while properly controlling the behavior of the vehicle

Slip controller for lock up clutch

Abstract: PURPOSE:To attain the improvement of fuel cost at the time of ordinary deceleration not judged as sudden deceleration, by retaining a lock up clutch in a coupling state or at a predetermined slip rate, driving reversely an internal combustion engine by means of torque from a drive wheel side, obtaining a sufficiently long fuel cut period. CONSTITUTION:In a case in which the brake operation of a vehicle is conducted when the accelerator operation of the traveling vehicle is stopped and the full closure state of a throttle valve M2 is detected by means of a throttle full closure detecting means M3, it is decided by means of a sudden deceleration deciding means M4 whether it is sudden deceleration or not. At the time of sudden deceleration decision, a target slip rate is increased and set by means of a target slip rate setting means M6, and on the basis of this target slip rate, the slip rate of a lock up clutch is controlled by means of a slip rate controlling means M7. Meanwhile, at the time of ordinary deceleration that is not decided as sudden deceleration, the lock up clutch is retained in a coupling state or at a predetermined slip rate, and an internal combustion engine is driven reversely by means of torque that is from a drive wheel side, and the number of revolutions is reduced slowly.

Verfahren zum erhoehen der fahrstabilitaet eines strassenfahrzeugs

Abstract: Disclosed are a process and circuit for increasing the dynamic stability of a road vehicle, using drive slip control acting on the brakes. The drive wheel (HM-Rad) which at any particular instant has the higher coefficient of friction is determined, and the rotational behaviour of this wheel is monitored and stabilized by brake action as soon as the drive slip of this wheel exceeds a threshold value. Any pressure in the brake of the second drive wheel (LM-Rad) is reduced.

Relative rotary angle adjustment of IC engine control shaft - involves shaft carrying in end area rotary angle-movable, centred and axially secured drive wheel

Abstract: A radial flange (8) for axial securement of a hub (10) concentrically located in the shaft end area (5) is in non-rotary connection with the drive wheel (4). The assembly (14) comprising the drive wheel (4) and the hub (10) via an axially acting tension device (15 spring 16) is movable under friction to a stop (17,21) in the end area (5) of the control shaft (2). Between a hub-side section (19) of the radial flange (8) of the hub (10) and a free face surface (20) of the shaft end area (5) a plate spring (16) is tensioned. The free face surface (20) of the shaft end area (15) acts as an additional stop (21) for a friction ring (22). USE/ADVANTAGE - To eliminate noise in the drive mechanism of an IC engine.

Wheel unit with motor, especially for vehicles

Abstract: The drive wheel unit comprises a motor (9), a casing (1) partially housing the said motor, a wheel support plate (22), a wheel (R) mounted rigidly on the plate, a reducing transmission (31) directly engaged between the motor (9) and the wheel (R), and a single main shaft (12) carrying the rotor (13) of the motor and an input member (35) of the transmission (31). The casing (1) comprises, on the wheel side, a fastening barrel (18) externally receiving a roller bearing (21) for the plate (22). The length of this barrel is equal to the distance (d) separating the input member (35) of the reducing transmission, and the free end of the plate (22). The reducing transmission is itself housed in the said plate, and a torsionally flexible portion of the main shaft (12) is housed in the barrel (18).

Drive and guide arrangement for endless conveyer

Abstract: A drive and guide arrangement for an endless conveyor includes a plurality of transport members, at least one drive wheel, and at least one chain of rubber links forming a traction member having respective end regions. The chain is reversible around the drive wheel at at least one of the end regions. The chain includes steel cable traction supports arranged within the rubber links. A first side of the chain faces the transport members and is formed with a plurality of block teeth. At least two of the block teeth have bores formed therethrough separated from one another by a predetermined distance. A second side of the chain opposite to the first side is formed with a plurality of drive teeth for engaging with the drive wheel. A guide is provided having a receiving profile and located adjacent to the chain. A plurality of connecting-and-guide members join the chain to the transport members. The connecting-and-guide members include a plurality of roller axles each being received in a respective one of the bores, and each having a first and second end. A plurality of axial-and-radial rollers are each respectively attached to the first end of a respective one of the roller axles and are each arranged to roll in the guide.

Power transmission gear of driving wheel for motor vehicle

Abstract: A hollow support is arranged on a vehicle frame and bears a horizontal drive shaft via bearings. The drive force of engine is transferred, via said horizontal drive shaft, to outside of the frame and then to drive wheel through chain wheel and gear, or belt drive. After a vehicle is equipped with such drive mechanism, its frame may be made into a straight shape and its distance from ground may be arbitrarily chosen. This unit may be used in single-or multiple-wheel driven vehicles with a simplified structure. If it is used in conjuction with independent hanger bracket having single vertical arm, its effectiveness is the most ideal.

Driving force controller for four wheel drive vehicle

Abstract: PURPOSE:To enhance accelerating property and cornering stability by estimating a road surface friction coefficient at the time of four wheel spin, and thereby determining the quantity of a reduction in torque for driving force control based on the estimated road surface friction coefficient. CONSTITUTION:When it is detected, for example, by a four wheel spin detecting means (c) that a vehicle is in four wheel spin, a road surface friction coefficient is estimated by a road surface friction coefficient estimating means (d) based on the driving torque of a clutch coupling drive wheel at the beginning of four wheel spin. The quantity of a reduction in torque is then determined by a torque reduction quantity determining means (e) based on the estimated road surface friction coefficient, a command to lower engine torque by the quantity of a reduction in torque determined, is outputted to an engine power lowering means (b) from a driving force control means (f). By this constitution, when the vehicle is in four wheel spin while being in four wheel drive, it is possible to effectively weaken four wheel spin, both accelerating property and cornering stability can thereby be enhanced.

Vertical/horizontal movement elevator

Abstract: PURPOSE: To facilitate the feed of electric power to a car by providing a contact connected to a power line in a track in a horizontal direction to generate a power during horizontal movement, a connector for a feed connected to a vertical moving truck during vertical movement, and a battery to feed a drive force during movement of an elevator between trucks. CONSTITUTION: A power is generated by a contact 10 connected to a power line 11 for a horizontal running passage during horizontal movement to supply a power required for illumination of the interior. A connector 12 is arranged to a truck 7 for vertical movement, and a connector 13 on the car side connected thereto is provided. During vertical movement, a power is fed to a car 6 through a vertical moving truck 7 by means of a feed cable 14 in a vertical running passage. In vertical movement, drive running is carried out by means of the primary coil 15 and the secondary coil on the car side of a linear motor. Further, a battery 9 is kept in a charged state and during movement between the trucks, a drive electric motor for the drive wheel of the truck is driven. COPYRIGHT: (C)1994,JPO&Japio

Combustion engine valve control mechanism - has gear and worm drive between engine crankshaft and cam shafts, gear drive having conical wheels and worm drive slidable along own axis

Abstract: A combination of a gear drive (2-4) and a variable worm drive (4-6) is arranged between the crankshaft (1) of the engine and each cam shaft (7). The gear drive is a conical wheel drive whose drive wheel (2) is rigidly mounted on the crankshaft and whose driven wheel (3) acts on the same axis as the driving worm (5). This drive worm slides axially along its axis (4) and is worked by a worm wheel (6) which is rigidly fixed to the cam shaft. ADVANTAGE - Overcomes the disadvantages with systems having just two or three preset control variants by offering a stepless adjustment of valve lift and/or valve timing.

Timepiece of the mechanical or electromechanical type including a drive wheel controlling at least one display system such as a date display

Abstract: The invention concerns a timepiece. Such timepiece comprises: a horometric movement (1) including a motor pinion or intermediate wheel (2), a crown wheel with interior teeth (6) associated with a first display system, such as a date display, and a jumper spring (8), a driving wheel set (10) including a drive wheel (12) controlled by the motor pinion (2) and transmitting a motor couple received from the motor pinion to the crown (6) through a salient tooth (14), such wheel set (10) additionally including a hub (16) which is mounted to rotate freely relative to the movement and which elastically supports the drive wheel (12) through an elastic arm (22), such timepiece being characterized in that the elastic arm (22) which supports the drive wheel (12) has a basically C form winding around the hub (16), while the drive wheel (12) meshes directly with the motor pinion (2). The invention is applicable to a timepiece of the mechanical or electromechanical type.

An overhead monorail conveyor system with motor-driven carriages

Abstract: The rail (10) of the system is constituted by profiled sections each having a horizontal flange (24) which has at least one upper rolling track (28) with a smooth surface Each carriage includes a main drive wheel (38) with a smooth peripheral surface (54) for rolling on the track (28) and a drive gear (54) which is fixed for rotation with the main drive wheel (38) in order to mesh with a rack (50) The pitch line of the rack (50) is located at a predetermined height (H) above the rolling track (28) The pitch circle radius (R2) of the gear (54) is smaller than the radius (R1) of the peripheral surface of the main drive wheel (38) and the difference between the radius (R1) of the peripheral surface and the pitch circle radius (R2) of the gear (54) is less than the predetermined height (H)