295 results about "Gradual transition" patented technology

Visibility of ply-bonding created by glassining spot embossing on decorative pattern embossed tissue products is provided by obscuring the glassined spot embosses by distributing them along a meandering path through the decorative pattern, obscuring the edges of the glassined spot embosses by providing a gradual transition therefrom and combinations of the two techniques.

A stair-climbing wheelchair has a pair of track assemblies that can be placed in an operative drive mode to propel the wheelchair along ascending and descending paths of travel relative to an obstacle such as a stairway, curb, or the like. Each track assembly includes a guide member with rollers at opposite ends thereof carrying an endless cleated belt. The guide member is arched between its end sections thereby permitting the endless belt to deflect upwardly between the rollers when the endless belt engages an obstacle such as a step, curb or the like. This permits a smooth gradual transition of the wheelchair onto and/or off the top step of a staircase. Preferably, each track assembly also includes an inclined tail section having a separate endless cleated belt. The track assemblies can also be utilized in connection with remote control and/or unmanned motorized vehicles.

The implantable lenses described herein provide for modified edge regions. In one example embodiment an implantable lens includes an anterior surface, a posterior surface and an outer edge surface separating the anterior and posterior surfaces. The anterior surface can include a corrective portion and a beveled portion. The beveled portion can be located between the corrective portion and the outer edge surface. The outer edge surface can have a first portion and a second portion, where the first portion abuts the posterior surface and the second portion, and where the second portion further abuts the beveled portion. The modified edge region provides a more gradual transition between the anterior and posterior surfaces.

A spiral cut transition member is disclosed for controlling the transition in stiffness of a catheter from a stiffer more pushable proximal section to a more flexible and trackable distal section and increasing kink resistance. The transition member has a spiral cut provided therein to vary the flexibility of the transition member over its length. The pitch of the spiral cut can be varied to facilitate a gradual transition in flexibility along the catheter. The transition member may be used in conjunction with any type of catheter including single-operator-exchange type catheters, over-the wire type catheters, and/or fixed-wire type catheters.

The handoff management system maximizes the communications capacity available from terrestrial air-to-ground cellular networks, while also integrating communications capabilities from satellite air-to-ground cellular networks and terrestrial cellular communications networks. The communications capacity is maximized by dynamically allocating communications from the aircraft over multiple communications channels to multiple cells of the terrestrial air-to-ground cellular network, and to satellite air-to-ground cellular networks and terrestrial mobile networks. This approach effectively provides an increase in the call handling capacity available to any aircraft and permits a gradual transition of communications from one cell to the next cell, rather than requiring an abrupt handover of all traffic from the aircraft from one cell to the next cell.

A sole component molded with different portions molded from different bead foams where there is a gradual transition between the different bead foams, as well as a method and apparatus for manufacturing the same. The molding system includes a mold cavity that is partially divided into at least two adjacent mold regions by at least one blade. The blade does not fully separate adjacent regions, but instead defines a space allowing beads introduced into adjacent regions to intermingle or overlap at the interface between the mold regions. The size, shape and configuration of the blade and the space may vary from application to application. The molding system may include a blade retractor that allows the blade to be retracted after the beads are loaded and before the beads are joined. The different bead foams may be different expanded thermoplastic polyurethane bead foams that vary in density or hardness or color.

A prosthetic patellar component includes a base and a bearing element that includes first and second femoral engaging surfaces disposed between first and second (superior/inferior) edge surfaces. The edge surfaces are curved to provide a gradual transition from a posterior facing portion to a nearly vertical superior or inferior facing portion. Moreover, the inferior-superior dimension of the component is at least approximately 90% of the medial-lateral dimension. The relative height and gradually transitioning edges significantly reduce the likelihood of sudden posterior rotation during deep flexion movement. The edge surfaces extend from a substantially posterior facing portion proximate to the first and second femoral engaging surfaces and a substantially vertical facing portion proximate the base. The curved edge surfaces can include a plurality of adjacent medial-laterally extending surface portions having angular displacement relative to an adjacent surface portion of less than 30 degrees in the anterior-posterior direction.

The invention relates to a coaxial-ridge waveguide-microstrip conversion structure ultra-broadband multi-channel power splitter. The input coaxial joint and the extended coaxial waveguide adopt a tapered coaxial gradual transition, and the tapered coaxial gradual transition And the ridge waveguide-microstrip conversion structure can realize ultra-wideband impedance matching; N ridge waveguide-microstrip conversion structures are uniformly distributed along the circumference in the extended coaxial waveguide to realize N-way parallel power division, and the entire power division circuit has axisymmetric To ensure that the signal amplitudes and phases of the N-channel power division signals are equal, the N-channel signal power division can be realized in one step, which can minimize the signal transmission loss. The present invention has ultra-wideband, low transmission loss, can realize any multi-channel power division output, each power division output signal has good amplitude and phase consistency, flat group delay characteristics in the band, and is easy to integrate with other peripheral planar circuits, etc. advantage. The invention is mainly used in microwave and millimeter wave power synthesis amplification systems, array antennas, etc., and has broad application prospects in microwave and millimeter wave systems such as communication and radar.

An ablation device which transmits radio frequency (RF) energy for the ablation of biological tissues has elongate inner and outer coaxial conductors extending from a proximal portion to a distal portion. An RF antenna is disposed at the distal portion of the device and transmits RF energy for ablation of a tissue region to be treated. Reflection of energy from the tissue or the ablation point is reduced by providing multiple layers of dielectric media about the antenna, or by providing a gradual transition point from the conductors to the antenna tip, by means of a longitudinally stepped dielectric layer transformer.

A face seal includes a seal seat 24 and a seal element 52 carried by a seal housing 32. The seal element cooperates with the seal seat to establish a seal. The housing includes a support 44 for the seal element and a shroud 42 for effecting a gradual transition between a normal condition and a deteriorated condition. The shroud 42 may have a tip 74 whose properties differ in lubricity, hardness or abradability relative to other portions of the seal housing.

The invention relates to a coplanar waveguide feeder ultra wide band folded ring antenna and a manufacturing method thereof; the structure of the antenna is that a top layer subring and a bottom layer subring are respectively positioned at the two sides of a dielectric substrate and are connected with each other by two rows of metalized via holes, so that a complete folded ring is formed; the range of the included angle between a transition line and a horizontal line is 25-35 degrees; a coplanar waveguide feeder is connected with rectangle tuning branchknot by ladder impedance conversion structure, and the coplanar waveguide feeder, the rectangle tuning branchknot and the ladder impedance conversion structure form broadband feeding structure and are positioned at one side of the dielectric substrate together with the top layer subring. The manufacturing method utilizes the technique of a printed circuit board, designs the folded ring on the dielectric substrate with low specific inductive capacity and adopts the structure of a gradual transition ring, so as to reduce the lowest operating frequency and increase the operation bandwidth; on the other hand, the coplanar waveguide and the patch-shaped tuning branchknot are adopted as the feeder; at the same time, the multistage ladder impedance conversion structure is introduced between the branchknot and the feeder. The antenna has the advantages of simple structure, no feeding part attachment, simple manufacturing technique, convenient integration and low cost.

One aspect of the present invention provides a method for systematically arranging paint color samples for convenient browsing and identification of desired colors by shoppers. Paint color sample cards are arranged on a two-dimensional display surface such that colors of similar hue are categorized or grouped together (e.g., along a column). Groups of paint color sample cards having different base hue or color are arranged such that there is a gradual transition between paint colors from one region to the next region. For instance, the colors of sample cards may gradually change from column to column across a two-dimensional display. Additionally, within each color group, paint color sample cards are arranged from most chromatic to least chromatic colors. Another aspect of the invention provides for accent color sample cards to be displayed adjacent to the various base color groups.

The invention discloses a preparation method of a diamond-like carbon (DLC) thin film and the DLC thin film prepared by using the preparation method. The method comprises the following steps: S3, preparing a metal carbide transition layer on a base material; S4, forming a metal W-doped DLC transition layer on the metal carbide transition layer by carrying out a plasma enhanced chemical vapor deposition (PECVD) process and a physical vapor deposition (PVD) process at the same time, wherein pulse bias voltage is controlled to gradually rise, and WC target current is controlled to gradually decrease, so that the metal W-doped DLC transition layer has a gradual transition from taking metal W as a main body to taking DLC as the main body from inside to outside; S5, adopting a PECVD method to form the DLC layer on the metal W-doped DLC transition layer. The preparation method improves the binding force between the DLC layer and the surface of the base material while reducing the production cost.

A rotary valve assembly for use in a process provides fluid communication and enables variable conduit interconnection and flow passage. Process cycle time is variable by means of rotational speed of through one or more apertures of a third valve member and respective alignment with one or more apertures of a first valve member and one or more apertures of a second valve member. Process step time is variable by means of adjustable position and variable alignment of aperture(s) of the first valve member and the second valve member. The rotary valve assembly provides for gradual transition and flow passage between process steps, flow metering, mixing, reversal, or any combination thereof. Process systems including the rotary valve include an adsorption process, humidity control process, heat pump process and/or water purification process among others.

The invention discloses a liquid-filled vibration isolator. The liquid-filled vibration isolator (A) has a first orifice channel (P1) providing communication between a pressure receiving chamber (f1) and a balancing chamber (f2). One of the pressure receiving chamber (f1) and the balancing chamber (f2) is communicated via a second orifice channel (P2) with an intermediate liquid chamber f3. The second orifice channel (P2) has a shorter distance or a larger cross-sectional area than the first orifice channel (P1). An elastic film member, such as a membrane (42), separates the intermediate liquid chamber (f3) and the other of the pressure receiving chamber (f1) and the balancing chamber (f2) from each other. A communicating hole (42a) of a predetermined size is formed in the elastic film member. An imaginary orifice channel combined from the two orifice channels (P1) and (P2) provides a high damping effect on input vibration of relatively low frequency. As the vibration frequency increases, a gradual transition is made to the damping characteristic of the second orifice channel (P2) only.

A method for manufacturing a multi-resin composite article is provided. The method comprises providing at least one fiber preform in a mold; injecting a plurality of resins into the at least one fiber preform at a plurality of locations on the at least one fiber preform; and forming at least one transition region along a mutual contact surface between the resins. Each of the at least one transition regions is defined by a gradual transition in composition from one of the resins to another of the resins. A multi-resin composite article is also provided. The article comprises: at least one fiber preform; a plurality of resins, wherein the at least one fiber preform is infused with the resins; and at least one transition region extending along a mutual contact surface between respective ones of the resins. A system for manufacturing such a multi-resin composite article is also provided.

A non-circular, mechanically variable optical attenuator using a pair of specially constructed polarizing elements with means enabling a gradual transition from un-crossed polarization vector fields to crossed polarization vector fields using a linear motion with respect to one another. The polarizing elements whose polarization axis varies with spatial position on the element have a polarization vector field that is a function of position on the element. Specifically, the two polarizing elements have a defined orientation of polarization axes or vectors on the polarization vector fields that vary with spatial location on the polarizing element such that when aligned light passes, and when the polarization axes are crossed, light is attenuated. The present attenuator has a practical application for dimmable mirrors or windows by providing a variable optical attenuator that is purely mechanical and non-circular in shape. Dimming of the mirror or window is controlled by gradually sliding one such special polarizer with respect to the other.

The invention provides a cadmium-free core-shell quantum dot and a preparation method thereof; the cadmium-free core-shell quantum dot comprises a quantum dot core, a gradual transition layer continuously grown on the surface of the quantum dot core, and a shell layer formed on the surface of the gradual transition layer, wherein the gradual transition layer comprises core cations and core anions in the quantum dot core, and shell cations and shell anions in the shell layer; in the cadmium-free core-shell quantum dot, the concentrations of the core cations and core anions decrease gradually from inside to outside, and the concentrations of the shell cations and shell anions gradually increase from inside to outside.