203results about How to "Reduce twist" patented technology

The present invention provides for a lightweight metal framing member having a central web and two parallel spaced apart side walls extending upwardly from the sides of the web. The framing member has at least one longitudinally oriented rib extending the length of the web of the framing member to aid in reducing shrinkage and twisting of the framing member when non-symmetrical reinforcing structures are found in the framing member.

A method for determining a rate of change of longitudinal direction of a subterranean borehole is provided. The method includes positioning a downhole tool in a borehole, the tool including first and second surveying devices disposed thereon. The method further includes causing the surveying devices to measure a longitudinal direction of the borehole at first and second longitudinal positions and processing the longitudinal directions of the borehole at the first and second positions to determine the rate of change of longitudinal direction of the borehole between the first and second positions. The method may further include processing the measured rate of change of longitudinal direction of the borehole and a predetermined rate of change of longitudinal direction to control the direction of drilling of the subterranean borehole. Exemplary embodiments of this invention tend to minimize the need for communication between a drilling operator and the bottom hole assembly, thereby advantageously preserving downhole communication bandwidth.

In accordance with the invention, an internal combustion engine having reciprocating piston sleeves is realized comprising an engine block with a pair of cylinders, each cylinder having an intake port, an exhaust port and two linearly opposing pistons connected to two opposing crankshafts. A pair of piston sleeves are reciprocatingly mounted in each cylinder, one piston sleeve around each piston. Each piston sleeve is connected to one of two eccentric shafts that run parallel and adjacent to each crankshaft. The piston sleeves have ported slots in communication with either the intake ports or the exhaust ports of each cylinder. The eccentric shafts are mechanically connected to the crankshafts such that they move in unison.

An end effector for a mobile, remotely controlled robot includes first and second fingers; each finger fixed to a gear segment for rotation therewith; and a drive subsystem driving the gear segments and the associated fingers between open and closed positions.

The invention discloses a remote sensing image fusion method based on sparse representation. The method comprises the following steps of: firstly, establishing a linear regression model between a multispectral image and a brightness component thereof; secondly, performing sparse representation on a panchromatic image and the multispectral image by using high and low resolution dictionaries respectively, and acquiring sparse representation coefficients of the brightness component of the multispectral image according to the linear regression model; thirdly, extracting detail components according to the sparse representation coefficients of the panchromatic image and the brightness component, and implanting the detail components to the sparse representation coefficients of each band of the multispectral image under a general component replacement fusion framework; and finally, performing image restoration to obtain a multispectral image with high spatial resolution. According to the method, the sparse representation technology is introduced into the field of remote sensing image fusion, so that the defect that high spatial resolution and spectral information cannot be simultaneously preserved in the prior art is overcome; and the fusion result of the method is superior to that of the conventional remote sensing image fusion method on the aspects of spectral preservation and spatial resolution improvement.

By removing material of low permeability from within and around a perforation tunnel and creating at least one fracture at the tip of a perforation tunnel, injection parameters and effects such as outflow rate and, in the case of multiple perforation tunnels benefiting from such cleanup, distribution of injected fluids along a wellbore are enhanced. Following detonation of a charge carrier, a second explosive event is triggered within a freshly made tunnel, thereby substantially eliminating a crushed zone and improving the geometry and quality (and length) of the tunnel. In addition, this action creates substantially debris-free tunnels and relieves the residual stress cage, resulting in perforation tunnels that are highly conducive to injection under fracturing conditions for disposal and stimulation purposes, and that promote even coverage of injected fluids across the perforated interval.

The present invention relates to an automatic spinning new end forming method and its equipment. The roving machine utilizes the coder positioned at the drafting portion position to detect the full-yarn length when the bobbin can be fulled, and makes the roving machine spin to a certain length in low speed, after the roving is spun to a certain length, makes the roving machine operate in low speed, at the moment makes the spindle rail stop lifting movement and makes the yarn be in said height position, winds 2-3 turns of halching and makes the spindle rail be quickly lowered to form large thread pitch wind so as to make the roving do not take-off in its transportation process; changes the speed ratio of flywer and roller so as to reduce roving twist, and obtain undertwisted roving, and when the ultralowering of spindle rail is made to place, the yarn is stretch-broken to produce fuzzy fibre whose length can be suitable for secondary automatic spinning new end formation.

The invention relates to a cotton textile and relative production, wherein it is characterized in that: its transverse line and longitudinal line use the cotton yarn mixed by cotton fiber and soluble vinylon fiber, while the mass between them is 70-85:15-30; and the production comprises: spinning the cotton yarn, warping, sizing, drying, spinning blank cloth, and following treatment. The inventive product is flexible, with wet adsorption, and high yield.

A limited entry perforating phased gun system and method for accurate perforation in a deviated/horizontal wellbore is disclosed. The system/method includes a gun string assembly (GSA) deployed in a wellbore with shaped charge clusters. The charges are spaced and angled such that, when perforated, they intersect at a preferred fracturing plane. Upon fracturing, the fractures initiate at least principal stress location in a preferred fracturing plane perpendicular to the wellbore from an upward and downward location of the wellbore. Thereafter, the fractures connect radially about the wellbore in the preferred fracturing plane. The fracture treatment in the preferred fracturing plane creates minimal tortuosity paths for longer extension of fractures that enables efficient oil and gas flow rates during production.

A battery separator has performance enhancing additives or coatings, fillers with increased friability, increased ionic diffusion, decreased tortuosity, increased wettability, reduced oil content, reduced thickness, decreased electrical resistance, and/or increased porosity. The separator in a battery reduces the water loss, lowers acid stratification, lowers the voltage drop, and/or increases the CCA. The separators include or exhibit performance enhancing additives or coatings, increased porosity, increased void volume, amorphous silica, higher oil absorption silica, higher silanol group silica, reduced electrical resistance, a shish-kebab structure or morphology, a polyolefin microporous membrane containing particle-like filler in an amount of 40% or more by weight of the membrane and ultrahigh molecular weight polyethylene having shish-kebab formations and the average repetition periodicity of the kebab formation from 1 nm to 150 nm, decreased sheet thickness, decreased tortuosity, separators especially well-suited for enhanced flooded batteries.

The present invention discloses a plug, which matches a corresponding socket. The plug comprises a body, a shell, a plurality of terminals and a plurality of wires. The body has a first contact surface directing to the corresponding socket, a second contact surface corresponding to the first contact surface and a plurality of terminal channels formed between the first contact surface and the second contact surface. Each terminal has a connection end that extends from the second contact surface out of the terminal channel and is accepted by the shell. On one side of the shell, the wires connect to the shell and the connection direction is vertical to the first contact surface. A gold finger board, placed in the shell, has a plurality of leads, each lead having a soldering pad connecting to the corresponding terminal at one end and having a gold finger connecting to the corresponding wire at another end. The plug of present invention provides the advantages of avoiding twisting of the wire and saving space.

A handheld device has a first body part with a first user interface element and a second body part with a second user interface element, and a link mechanism configured to interconnect the first body part and the second body part movably by a user between a first configuration and a second configuration. The first body part and the second body part being stacked in a first order in the first configuration and in a second order opposite to the first order in the second configuration. Each body part has a user interface on its upper surface so that either one can be exposed to a user by changing between the first and second configurations.

The invention provides a spinning method of terylene-viscose blended yarn, which comprises the following steps: opening and cleaning cotton, combing the cotton, making ribbons, spinning coarse yarn and spinning fine yarn; while spinning the coarse yarn, feeding two pieces of coarse yarn in parallel into the same drawing mechanism of a spinning machine at 9-13 mm intervals so as to simultaneously draw the two pieces of coarse yarn in parallel. The method applies a Sirospun technology to the spinning of the terylene-viscose blended yarn. The two pieces of coarse yarn are simultaneously fed intothe spinning machine, the single yarn twist area is shorter, and the applied degree of twist is low, so that the included angle of the fiber spiral yarn and the yarn shaft in the single yarn is relatively small, and the single fiber in the single yarn can not transversely protrude out of the outer surface of the yarn due to the strong effect of the twisting force. Thus, the terylene-viscose blended yarn has the advantages of little filoplume, smooth surface, even yarn, high strength and few defects. The method enhances the quality grade of the terylene-viscose blended yarn.

An interbrace is provided for reducing torquing, twisting, and pivoting between a V-twin engine and a generally separate motorcycle transmission. A first embodiment of the interbrace includes a forward engine flange portion, a rearward transmission end cap portion which functions as a transmission end cap, and a connecting portion interconnecting the engine flange portion and the transmission end portion. A second embodiment of the interbrace includes a forward engine flange portion, a rearward transmission end plate flange portion, and a connecting portion interconnecting said engine flange portion and said transmission end plate flange portion.

A suture anchor comprises an anchor body comprising a longitudinal axis and bone engaging external threads oriented for rotation about the longitudinal axis; and a suture attachment on the anchor body rotational with respect to the body about the longitudinal axis whereby to help reduce twisting of one or more sutures which may be attached to the suture attachment as the anchor body is threaded into a bone.

The invention discloses a device and a method for twisting detection and untwisting for a panda-type polarization-maintaining optical fiber. The device comprises optical fiber deploying equipment, optical fiber retracting equipment, an untwisting rotating table, a light source, an optical lens, an image senor, a computer and a controller. The method comprises the following steps: the side-view lens effect of the optical fiber is utilized, and the light source perpendicularly illuminates a side surface of the optical fiber, so that light distribution, being reflected by the optical fiber, contains twisting angle information of the optical fiber; the light distribution is acquired by the image sensor; the twisting angle information is extracted through data processing of the computer; according to the twisting angle information, the controller controls the untwisting rotating table to rotate for untwisting of the optical fiber. Through the adoption of the method, optical fiber twisting detection can be combined with optical fiber untwisting, that is, the optical fiber can be coiled while being untwisted. Therefore, a polarization-maintaining optical fiber coil with a low twisting angle can be prepared, and the requirement for manufacturing an optical fiber top which is low in magnetic sensitivity can be met.