876results about How to "Increased torsional stiffness" patented technology

Aspects of the present disclosure relate to mounting electronics and optical systems in head-worn see-through computer displays. In embodiments, a head worn computer includes an optical chassis with a rigid open box structure configured to provide a stable optical mounting reference plane and a plurality of image source reference planes. The head worn computer further includes a first image source mounted on one of the image source reference planes to project first image light through a first hole in the optical mounting reference plane and a second image source mounted on a second of the image source reference planes and configured to project second image light through a second hole in the optical mounting reference plane. An outer frame holds the optical chassis such that, when worn by a user, the first and second image light is aligned with the eyes of the user.

The invention relates to a mobile communications device comprising a housing, a transceiver in the housing, a keypad connected to the housing, and a display connected to the housing, wherein the housing comprises a first section movably connected to a second section of the housing by a multi-axis hinge, wherein a first axis of rotation of the hinge is provided at the first section of the housing and a second offset axis of rotation of the hinge is provided at the second section of the housing, and wherein the hinge comprises means for synchronizing rotation of the first and second sections relative to the hinge through a path of about 360 degrees. The invention further relates to a hinge for use therein.

The present invention relates to mechanical-electrical power conversion systems. The systems comprise one or more electroactive polymers that convert between electrical and mechanical energy. When a voltage is applied to electrodes contacting an electroactive polymer, the polymer deflects. This deflection may be converted into rotation of a power shaft included in a motor. Repeated deflection of the polymer may then produce continuous rotation of the power shaft.

A frame assembly for a two-wheel vehicle includes a front wheel fork and chainstays. Between the front wheel fork and the chainstays, the frame assembly further includes a saddle tube, a crank housing, and a lower tube connecting the crank housing to a steering tube. A parallelogram-shaped suspension assembly is attached to a rear end of the chainstays.

In the event of a failure of a first electric motor drive signal generator, e.g., the microcomputer, which generates a first electric motor drive signal for performing a feedback control, a second electric motor drive signal generator, e.g., a PWM signal generator, which is made up of discrete circuit components, directly converts a steering torque signal into a second electric motor drive signal. An electric motor, which generates the assistive steering force, is driven by the second electric motor drive signal.

A tightening device adapted to equip an article of footwear, which makes it possible to hold the foot laterally, while distributing on the foot the pressure generated by the tightening device. The tightening device includes an upper flap that partially covers a lower flap. The flaps hold the foot by the tightening device which includes at least one anchor positioned on each of the flaps. The upper flap is more flexible than the lower flap.

Systems and methods for a rugged hand held mobile terminal design are provided. The mobile terminal design includes a monocoque enclosure for housing electronic components. The electronic components are mounted on a rail system, which is positioned within an interior portion of the enclosure through an open end of the enclosure. The mobile terminal design also includes a display bezel. The display bezel and the rail system have mating parts for securing the assembly together.

A method of manufacturing a composite laminate and a composite laminate manufactured according to the method are provided. The laminate comprises a series of fabric plies (1 to 15) of fibrous reinforcing material set in plastics matrix material. The method includes the steps of providing a relatively small number of fabric styles from which to choose; selecting at least one of those fabric styles according to design requirements for a particular portion of the laminate; laying up that portion with the said selection, and repeating the selection and layup steps as required to complete the layup of the laminate.

The harmonic wave gear driver with two-arc teeth profile comprises wave generator, flexible wheel and rigid wheel. The wave generator is in form of elliptic cam, the flexible wheel and the rigid wheel has a two-arc teeth profile respectively which can realize conjugation motion. The driver can effectively improve the stress condition of the flexible wheel tooth-root and drive quality and increase load-bearing ability and torque rigidity of harmonic wave driver, and further lower minimum drive ratio of harmonic wave driver. Advantages: good processing property.

The present invention relates to a rubber crawler including: a joint formed by joining together opposite ends of a crawler body comprising an elastic member shaped like a belt having the opposite ends; and lugs projected at predetermined space intervals along a longitudinal direction of the belt and arranged on an outer circumferential surface of the crawler body. The joint is disposed on the outer circumferential surface of the crawler body, as located in a ground non-engaging portion and at different positions with respect to the longitudinal direction of the belt, the ground non-engaging portion defining an area excluding the lugs. In this way, stress acting on the joint is distributed or reduced.

The invention discloses a streamlined steel-concrete superimposed box girder, which relates to the technical field of bridge engineering and is used for a long-span bridge girder. Two sides of the superimposed box girder are provided with tuyere structures, and a bridge panel adopts a superimposed structure consisting of prefabricated concrete slabs and a post-poured concrete layer. When the box girder is in use, the superimposed box girder is a streamlined single-box single-chamber or single-box multi-chamber cross section; the tuyere structures are polygonal open thin-walled structures; and longitudinal-transverse prestress is applied in the superimposed bridge panel. The box girder effectively improves the torsional rigidity and wind-resistant stability of the section of the girder, remarkably improves the integrity and durability of the bridge panel, and expands the application of superimposed girders in cable-stayed bridges and other long-span bridges.

To make an oriented plastics material geogrid 10 in which oriented strands 6, 9 form triangular meshes with a junction 11 at each corner and six of the strands 6, 9 meet at each junction 11, a plastics material sheet starting material 1 has holes 2 in an array of hexagons 3, opposite holes 2 of each hexagon being aligned in the machine direction, and the starting material 1 is stretched first in the machine direction and secondly in the transverse direction. In the eventual geogrid 10, the centre portions of the hexagons in the starting material 1 form the junctions 11. The centres of the junctions 11 are slightly biaxially oriented, but at the edges of the junctions 11, the orientation of the edge of substantially each strand 6 or 9 runs around the edge of the respective junction 11 and into the edge of the next strand 6 or 9. During the second stretch, restraint can be applied in the first stretch direction and discontinued before the material is allowed to relax in the second stretch direction. If desired, the procedure can be terminated after the first stretch, to produce a uniaxially-oriented geogrid. By using a starting material 21 which has through holes 22 and weakened zones 23, it is possible to form the geogrid of the invention from a starting material 21 having a rectangular array of through holes 22.

The cleaning instrument (10) comprises a head portion (10) and, adjacent thereto, a cleaning portion (14) having a shank (20), which is provided with bristles (22) on its external surface. In order that especially the tooth root canal or also a tooth interstice can be reliably cleaned using the cleaning instrument (10), the shank (20) is of integral construction with the bristles (22).

A vehicle suspension provides increased auxiliary roll stiffness by utilizing spring assemblies having a thick truncated half-leaf, a thin full-leaf, and a thin truncated half-leaf located opposite the thick truncated half-leaf. The thick truncated half-leaf increases the torsional rigidity of the spring assembly in order to increase the leaf twist sub-component of auxiliary roll stiffness and increases the bending rigidity of half of the spring assembly in order to increase the axle torsion sub-component of auxiliary roll stiffness. The thin full-leaf provides structural integrity, and the thin half-leaf allows tuning of the overall vertical spring rate of the suspension and limits the leaf stresses in the thin full-leaf.

A door assembly has a first door integrated with a second door. The first door has a first door cowl. The second door is pivotably mounted to the first door and has a second door cowl forming at least a portion of the first door cowl. The door assembly includes at least one actuator coupled to the first and second doors. Each one of the first and second doors is pivotable between open and closed positions and defines an opening when moved to the open position. The openings of the first and second doors face in opposite directions. The actuator is operative to pivotably move at least one of the first and second doors between the open and closed positions.

An antenna assembly and a method of mounting such an assembly are disclosed. A first and a second assembly portion are joined together, wherein the assembly portions each comprise a elongated reflector body serving as a reflector for electromagnetic power radiated by the antenna assembly portion, and a set of antenna element receiving means located in a linear row along a longitudinal direction of the reflector body for respectively receiving an antenna element, and side portions along the long sides of the said reflector body. The assembly method comprises the step of fastening the first and second assembly portions to each other along a respective side portion of the said assembly portions so as to form a dual array antenna assembly.