Abstract:
A heat exchanger includes a plurality of tubes conveying a first fluid flow therethrough disposed substantially transverse to a direction of a second fluid flow through the heat exchanger and arranged in a plurality of tube rows extending substantially along the direction of the second fluid flow. The heat exchanger further includes a web sheet having a plurality of webs and a plurality of tube recesses disposed between the webs of the plurality of webs. Each tube of the plurality of tubes is secured to a tube recess of the plurality of tube recesses. Forming a heat exchanger includes forming a web sheet having a plurality of webs and a plurality of tube recesses located between the webs. A plurality of tubes are formed and configured to convey a first fluid flow therethrough. The plurality of tubes are inserted into the plurality of tube recesses.
Abstract:
A belt for suspending or driving an elevator car includes a plurality of wires arranged into one or more cords; and a jacket substantially retaining the one or more cords. At least one of the one or more cords includes a plurality of non-load bearing filler filaments interposed between adjacent wires of the plurality of wires. An elevator system includes an elevator car, one or more sheaves, and one or more belts operably connected to the car and interactive with the one or more sheaves for suspending or driving the elevator car. Each belt of the one or more belts includes a plurality of wires arranged into one or more cords and a jacket substantially retaining the one or more cords. At least one of the one or more cords includes a plurality of non-load bearing filler filaments interposed between adjacent wires of the plurality of wires.
Abstract:
An elevator system having a regenerative elevator drive and an electrical or mechanical energy storage system includes an energy management controller. Voltage and state-of-charge of the energy storage system are monitored by the energy management controller. During sustained marginal quality power conditions of the primary input power to the elevator, the energy management controller maintains and extends operation of the elevator system by selecting a mode of operation where the motor of the elevator is powered by the energy storage system, while using power available from the grid and the elevator regenerative runs for charging the energy storage system. The energy management controller may delay elevator runs, reduce elevator speeds, temporarily shut down elevator operation, and adjust operating limits of the energy storage system based upon line voltage, state-of-charge, elevator loading, and power requirements of the elevator system.
Abstract:
An exemplary method of making a load bearing elevator traction belt includes applying individual coatings of a jacket material to each of a plurality of tension members such that each tension member is individually coated separately from the other tension members. A portion of the individual coatings are joined together to secure the tension members into a desired alignment and to form a single jacket that establishes a geometry of the belt.
Abstract:
An elevator door hanger apparatus includes a door hanger (22) configured to be attached to a top portion of a door panel (14) and to at least one movable member and an isolator plate (24) attached to the door hanger and including a lip extending from a bottom of the isolator plate away from the door hanger.
Abstract:
A passenger conveyor (20) includes a handrail assembly (30) comprising a handrail (32) having a plurality of co-extruded polymer materials (34, 36). In one example, an outermost portion (34) establishes a passenger gripping surface (38). One example includes an extruded soft, low cost polymer in the middle of the handrail cross section to reduce cost and weight. A disclosed example includes a toothed driving surface (40) on an inner side made of a selected one of the polymer materials (34, 36). In one example, the driving surface (40) and the gripping surface (38) comprise the same polymer material.
Abstract:
A plurality of stepchain links (30, 130, 230)of a passenger conveyor system (20) connected to form a continuous loop are from die cast or from stamped or laser cut metal. Each stepchain link (30, 130, 230) includes a plurality of teeth (32, 132, 232) made of a single piece of material that engage a drive member (36). In one example, a plate of injection molded plastic teeth (294) are snapped onto the links to reduce corrosion.
Abstract:
A heat exchanger includes a plurality of polymer tubes extending between and fluidly connecting an inlet manifold and an outlet manifold, thereby providing a flow path inside said tubes for a first fluid between the inlet manifold and the outlet manifold. The tubes are configured to have space between the exterior surfaces thereof, thereby providing a fluid flow path for a second fluid through the space between the exterior surfaces of the tubes.
Abstract:
Elevator tension members are disclosed. The disclosed tension member longitudinally extends along a longitudinal axis and includes a plurality of fibers formed into one or more primary strands or cords extending parallel to the longitudinal axis and a plurality of fibers formed into one or more secondary strands or cords extending parallel to the longitudinal axis and through less than the full length of the belt, and a jacket retaining the primary and secondary strands or cords. The secondary strands or cords have a tensile modulus greater than a tensile modulus of the jacket and less than a tensile modulus of the primary strands or cords. Methods of making the tension member are also disclosed.
Abstract:
A belt for suspending and/or driving an elevator car includes a plurality of wires arranged into one or more cords and a jacket substantially retaining the one or more cords. Each cord includes a plurality of wires arranged around at least one non load-bearing core. An elevator system includes an elevator car and one or more sheaves. One or more belts are operably connected to the car and interactive with the one or more sheaves for suspending and/or driving the elevator car. Each belt of the one or more belts includes a plurality of wires arranged into one or more cords and a jacket substantially retaining the one or more cords. Each cord includes a plurality of wires arranged around at least one non load-bearing core.