16126 results about "Gear drive" patented technology

A wind turbine capable of driving multiple electric generators having a ring or shroud structure for reducing blade root bending moments, hub loads, blade fastener loads and pitch bearing loads. The shroud may further incorporate a ring gear for driving an electric generator. In one embodiment, the electric generator may be cantilevered from the nacelle such that the gear on the generator drive shaft is contacted by the ring gear of the shroud. The shroud also provides protection for the gearing and aids in preventing gear lubricant contamination.

Described herein are atherectomy catheters, systems and methods that include a distal tip region that may be moved laterally so that its long axis is parallel with the long axis of the main catheter body axis. Displacing the distal tip region laterally out of the main catheter body axis exposes an annular blade and opens a passageway for cut tissue to enter a storage region within the catheter. The annular blade may be internally coupled to a drive shaft that rotates the blade, and thus the exposed blade edge may have the same crossing profile (OD) as the rest of the distal end region of the catheter. Also described herein are gear-driven atherectomy devices that may use a cable drive shaft to actuate the annular blade. Both push-to-cut and pull-to-cut variations are described, as are methods for cutting tissue and systems including these atherectomy catheters.

A pump drive head for a progressing cavity pump comprises a top mounted stuffing box rotatably disposed around a compliantly mounted standpipe with a self or manually adjusting pressurization system for the stuffing box. To prevent rotary and vertical motion of the polish rod while servicing the stuffing box, a polished rod lock-out clamp is provided with the pump drive head integral with or adjacent to a blow-out-preventer which can be integrated with the pump drive head to save space and cost. A centrifugal backspin braking system located on the input shaft and actuated only in the backspin direction and a gear drive between the input shaft and output shaft are provided.

A vehicle tailgate extension apparatus comprises a tailgate extender, having a stowed position in which the tailgate extender is located within a space within the tailgate, and a deployed position in which an exposed portion of the tailgate extender protrudes out of the tailgate space, a motor, and a gear drive assembly coupling the motor to the tailgate extender. The motor and gear drive assembly can be located within the tailgate space.

A method of producing a masonry block including providing a mold assembly having a plurality of liner plates that together form a mold cavity having an open top and an open bottom, wherein at least one of the liner plates is moveable between a retracted position and a desired extend position relative to an interior of the mold cavity with a gear drive assembly. The at least one moveable liner plate is moved to the desired extended position, the bottom of the mold cavity is closed with a pallet, dry cast concrete is placed in the mold cavity via the open top, the top of the mold cavity is closed with a moveable head shoe assembly, and the dry cast concrete is compacted to form a pre-cured masonry block. The at least one moveable liner plate is moved to the retracted position, the pre-cured masonry block is expelled from the mold cavity and cured.

A multi-port rotary valve used to distribute coolant to an engine cooling system comprises a valve body having a plurality of outlet ports for directing coolant flow to a radiator circuit, a heater circuit, and an auxiliary circuit. An internal gear driven rotary disc includes a gear driven mechanism located on an inner circumference of the rotary disc. The rotary disc includes two apertures positioned on a top surface of the rotary disc for regulating predetermined flow paths and flow rates to the plurality of ports. An inlet housing body which includes an inlet port mates with the valve body and encases the rotary disc. An actuator which is coupled to a drive gear mounted internal to the inlet housing body is responsive to a control signal for transmitting a torque to the internal drive gear for rotating the rotary disc to regulate coolant flow.

The present invention is an exemplary embodiment of the present invention is directed to a system, method and computer program product for creating a three-dimensionally reconfigurable cavity. The system can include a container that is configurable to create a three dimensional cavity. The system can be operative to form a footwear last in the cavity. The last can be formed from a plastic-like material. The system can include a blow molding apparatus having at least one directional deflector. The container can be capsule, hemispherical, cylindrical, or spherical-shaped. The system can include a container having holes to receive rods. The system can include an array of rods. The rods can be movable through the container. The system can further include rods that are threaded; gear-driven; coupled to a belt; coupled to a partial belt; or belt-driven. The cavity can be formed by an inner end of the rods. If more than one rod occupies a single point of the cavity, then only one rod participates in forming the cavity and other rods will not participate. Participating rods can be selected according to an optimizing module. The software module can determine an intersection of a rod with a digitized cluster of points representing a 3 dimensional surface. A method of forming a footwear last from a collapsible and expandable last is described.

An air damper assembly for regulating an air flow includes a frame, a plurality of elongated damper blade rotatably mounted to the frame, and a drive mechanism for actuating the damper blades between open and closed positions. The drive mechanism includes a gear fixedly secured to a distal end of each of the damper blades and an elongated rack slidably coupled to the frame. The rack meshingly engages the gears such that linear movement of the rack in a first linear direction results in rotational movement of the damper blades in a first rotational direction and linear movement of the rack in a second linear direction opposite the first linear direction results in rotational movement of the damper blades in a second, rotational direction opposite the first rotational direction

There is provided herein a support surface such as a bed or chair which contains a network of inelastic straps, the tension in each of which can be independently sensed and adjusted under control of an electronic monitor. Preferably, each strap will contain a plurality of sensors to allow an attached electronic monitor (preferably one with a microprocessor) to determine in real time the amount of pressure (or the duration of the pressure) applied to each strap. Based on that information, the attached monitor will periodically loosen or tighten the straps as needed to move support for the patient's body away from current pressure points. In one preferred arrangement, each strap will preferably be loosened or tightened through the use of a worm gear drive or similar mechanical motor.

A torque vectoring gear drive apparatus for controlling drive torque distribution. The gear drive apparatus comprises an input shaft, first and second output shafts, a planetary interaxle differential unit for transmitting torque from the input shaft to the first and second output shafts, and a speed gear assembly provided for overriding said planetary interaxle differential unit. The planetary differential unit includes a planet carrier drivingly coupled to the input shaft and rotatably supporting at least one planet gear, a sun gear drivingly coupled to the at least one planet gear and a ring gear drivingly coupled the first output shaft, the sun gear drivingly coupled to the second output shaft. The speed gear assembly selectively couples the input shaft to the sun gear to define a first drive mode in which the sun gear is driven at a first speed.

A paving machine which is configured to move in a paving direction for spreading, leveling and finishing concrete into a form having a generally upwardly exposed, finished concrete surface and terminating in lateral concrete sides. The paving machine has a main frame, including a center module, bolsters laterally movably connected to respective lateral sides of the center module for changing a spacing between the bolsters, and a crawler track associated with respective aft and forward ends of the bolsters. A bolster swing leg for each crawler track supports an upright jacking column secured to the swing leg proximate a free end thereof. A worm gear drive between the jacking column and the crawler track permits rotational movements of the crawler track and the jacking column about an upright axis. A hinge bracket is interposed between each swing leg and an associated surface of the bolsters and includes a fixed, upright pivot shaft that pivotally engages the swing leg to enable pivotal movements of the swing leg about an upright axis in a substantially horizontal plane. The hinge bracket further includes a pivot pin that is laterally spaced from and fixed in relation to the pivot shaft. A length-adjustable holder capable of being held at a fixed length has a first end pivotally engaging the pivot pin on the hinge bracket and a second end that pivotally engages the swing leg. The holder permits pivotal motions of the swing leg about the hinge pin when it is in its length-adjustable configuration and prevents substantially any motion of the swing leg when the holder is in its fixed-length configuration. A feedback loop cooperates with angular position transducers and automatically keeps the crawler tracks oriented in the paving direction of the machine when the swing legs move in a horizontal plane relative to a remainder of the paving machine. The paving machine can be reconfigured between its paving orientation and a road transport orientation by activating the crawlers to move the swing legs and the crawlers into a narrowed transport configuration.

The present invention relates to a cooling apparatus comprising a refrigeration or air-conditioning apparatus. In particular the present invention relates to refrigeration or air-conditioning apparatus utilizing a mini-centrifugal compressor with rotational power provided by a ratioed gear drive assembly coupled to an internal combustion engine.

An above-ground sprinkler may have a head that rotates about an angle determined by the relative angles between a pair of arc adjustment rings. Rotation of the head may be driven by a drive mechanism with a rotor rotationally driven by fluid flowing to the head. The drive mechanism may have a valve disposable in two positions to control flow to the rotor to determine the direction in which the rotor rotates. A reduction gear drive may transmit torque from the rotor to the head to cause the head to rotate. The head may have a cover with an outlet aperture and a flow control member that rotates within the cover to dispose any of a plurality of nozzles in alignment with the outlet aperture. A deflection screw or a slider with a plurality of deflectors may be used to provide variable deflection of water sprayed from the outlet aperture.

A gas turbine engine (10) provides a differential gear system (58) coupling the turbine (20) to the bypass fan (14) and the compressor (16). In this manner, the power/speed split between the bypass fan and the compressor can be optimized under all conditions. In the example shown, the turbine drives a sun gear (74), which drives a planet carrier (78) and a ring gear (80) in a differential manner. One of the planet carrier and the ring gear is coupled to the bypass fan, while the other is coupled to the compressor.

Mechanism for displaying the day and phase of at least a first celestial body, comprising a gear train for a constant frequency gear drive on an output of a timepiece movement. This mechanism includes a means for the three-dimensional display of the day and phase of said first celestial body represented by a first mobile component, which is driven by the gear train, which includes a phase train and a day train, each in mesh on an output of this same movement.

This phase train and/or this day train include at least one uncoupling means between the input and its output thereof.

The invention discloses an automatic speed change mechanism for a dual-motor clutch-free blade electric vehicle. The automatic speed change mechanism comprises a first input shaft, a second input shaft and an output shaft which are arranged in parallel. A first-gear driving gear, a first synchronizer and a third-gear driving gear are arranged on the first input shaft. A second-gear driving gear, a second synchronizer and a fourth-gear driving gear are arranged on the second input shaft. A first-gear driven gear meshed with the first-gear driving gear, a second-gear driven gear meshed with the second-gear driving gear, a third-gear driven gear meshed with the third-gear driving gear and a fourth-gear driven gear meshed with the fourth-gear driving gear are arranged on the output shaft. The automatic speed change mechanism removes a clutch, the structure of the whole mechanism is simplified, and the manufacturing cost is low. By means of dual-motor driving and controlling the synchronizers and driving motors to achieve gear shifting without power failure, the power switching smoothness is good. When any driving motor breaks down, the other driving motor can work continuously to drive the vehicle to run. Thus, the system reliability is high.

An apparatus for retracting a pool cover from over a pool, or extending a pool cover over a pool, includes a pool cover collecting drum supported for rotation on its ends, and a drive gear connected to the drum. A power gear for engaging the drive gear is operably connected to a portable, battery operated electric drill by a power shaft. When the drill is activated, the drive gear rotates the pool cover collecting drum to collect and retract the pool cover from over the pool. The pool cover is placed back over the pool by operation of a complementary apparatus on the opposite side of the pool, such as a rope spool collecting apparatus having an engageable drive gear. The gear-driven spool pulls on a rope attached to a rigid end or carrier of the pool cover. As the pool cover is extended and retracted it slides in a track, allowing the cover to serve as a safety cover. The gears may be located in a sealed housing filled with lubricant. The drive shaft may include a universal joint, and the drill may be designed to engage the power shaft with a flexible socket adapter.