Abstract

Provided is a nut that extends the fatigue life of a bolt used in bolt and nut fastening, and that is easily manufactured. A nut (1) has a nut body (2) provided with a flange part (5), and has a shallow recess (7) having a depth of 1.25 pitch or less, provided on the axial side of a seating surface (5s) which is a flat surface extending perpendicularly to the axis on the fastening side of the nut body (2). The nut (1) preferably has an additional rigid part (6) on the open side.

IPC Classes  ?

• F16B 37/00 - Nuts or like thread-engaging members

Abstract

Provided is a nut that extends the fatigue life of a bolt used in bold and nut fastening, and that is easily manufactured. A nut (1) has a nut body (2) provided with a flange part (5), and has a shallow recess (7) having a depth of 1.5 pitch or less, provided on the axial side of a seating surface (5s) which is a flat surface extending perpendicularly to the axis on the fastening side of the nut body (2). The nut (1) preferably has an additional rigid part (6) on the open side.

IPC Classes  ?

• F16B 37/00 - Nuts or like thread-engaging members

Abstract

The present invention optimizes a washer and a washer fastening structure such that a force is mostly oriented toward the opening side of a nut by guiding the position of the force applied onto the nut toward the outer circumferential side of a nut bearing surface and, consequently, reduces a load on the first thread where the bolt and nut are fastened and become engaged. A washer according to the present invention has a washer body and a bolt hole that passes through the washer body, the washer having, in the vertical cross-section thereof, a stress non-transmitting space that opens toward the bolt hole and that extends in the radial direction of the bolt hole, and the stress non-transmitting space having a concentric annular shape centered on the axis of the bolt hole.

IPC Classes  ?

• F16B 31/06 - Screwed connections specially modified in view of tensile loadBreak-bolts having regard to possibility of fatigue rupture
• F16B 43/00 - Washers or equivalent devicesOther devices for supporting bolt-heads or nuts

Abstract

The purpose of the present invention is to improve the fatigue strength and lifespan of a bolt by widely distributing, over engagement screw threads, the flow of stress between the object to be fastened (1) through which a bolt has been passed and a nut (4) and reducing a load concentration to a first engagement screw thread. To this end, stress non-transmission spaces (1s) are formed on the nut (4) side and a bolt hole (1h) side of an object to be fastened (1).

IPC Classes  ?

• F16B 31/06 - Screwed connections specially modified in view of tensile loadBreak-bolts having regard to possibility of fatigue rupture
• F16B 5/02 - Joining sheets or plates to one another or to strips or bars parallel to them by means of fastening members using screw-thread

Abstract

33(Nb, Ta, V)+(Zr, Hf)+O.

IPC Classes  ?

• F16B 37/12 - Nuts or like thread-engaging members with thread-engaging surfaces formed by inserted coil-springs, discs, or the likeIndependent pieces of wound wire used as nutsThreaded inserts for holes
• F16F 1/02 - Springs made of steel or other material having low internal frictionWound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
• F16F 1/06 - Wound springs with turns lying in cylindrical surfaces

Abstract

2121211 + 5 lengths of the thread pitch, more of the stress on the threads of the nut during fastening is moved to the third thread on toward the open side of the nut and load concentration on the first engaged thread of the nut and the bolt is reduced.

IPC Classes  ?

• F16B 31/02 - Screwed connections specially modified in view of tensile loadBreak-bolts for indicating or limiting tensile load
• F16B 33/06 - Surface treatment of parts furnished with screw-thread, e.g. for preventing seizure
• F16B 37/00 - Nuts or like thread-engaging members

Abstract

With respect to a protective film having a segmented structure, the purpose of the present invention is to obtain a protective film having a segmented structure that is stable in terms of strength and that prevents the destruction or damage of a groove structure due to load deformation stress from outside and inside forces, and does so by means of, in particular, a structure that connects a side surface of a groove to the bottom section of the groove and a structure of the bottom section of the groove. The present invention is a protective film having a segmented structure, the film being formed by depositing a film on a base material, wherein the protective film is obtained by depositing the protective film, after machining a groove in the base material, on the base material and forming spaces between the segmented protective film, and the vertical cross-sectional surface of a part where the groove side surface and the groove bottom surface intersect is connected by a downward convex curve and the vertical cross-sectional surface of the bottom section of the groove is a downward convex curve or a straight line.

IPC Classes  ?

• C23C 16/04 - Coating on selected surface areas, e.g. using masks
• B23B 27/14 - Cutting tools of which the bits or tips are of special material
• B23B 27/20 - Cutting tools of which the bits or tips are of special material with diamond bits
• C23C 14/04 - Coating on selected surface areas, e.g. using masks
• C23C 14/06 - Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
• C23C 16/27 - Diamond only

Abstract

The present invention provides scissors which take advantage of the spring characteristics of selected shearing material so that each blade thereof is able to conform in shape to the other blade in a manner shearing against the other blade and thereby cut along the other blade. The present invention relates to medical scissors which have a pair of handle parts with an upper blade and a lower blade being formed on the leading end parts thereof and gripping parts being formed on the other end parts, such that the upper blade and the lower blade open and close by the gripping parts being opened and closed about a fulcrum whereat the handle parts intersect, the upper blade and/or the lower blade being made from an alloy with an elastic deformability of 0.2% or more.

IPC Classes  ?

• A61B 17/3201 - Scissors
• B26B 13/00 - Hand shearsScissors
• B26B 13/06 - Hand shearsScissors characterised by the shape of the blades

Abstract

The problems in accordance with the present invention are: to provide a DLC film, wherein a protective film having a segmented shape is easily formed, quality control of the protective film is improved, segmented shapes with a high degree of freedom (that are complicated) are possible, and the application of the DLC film is possible not only to two-dimensional shapes but also to three-dimensional shapes; and to provide a method for forming the DLC film. As solutions to the problems, there are provided a protective film and a method for producing the protective film, characterized by, when forming on a substrate the protective film having a segmented shape formed by depositing a film so that the film is formed divided into segments, masking the substrate using a drawing material so that segments having predetermined shapes are obtained, thereafter depositing the protective film, and then removing the masked part to form a spacing between segments.

IPC Classes  ?

• B05D 3/06 - Pretreatment of surfaces to which liquids or other fluent materials are to be appliedAfter-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation
• C23C 16/04 - Coating on selected surface areas, e.g. using masks
• C23C 16/26 - Deposition of carbon only
• C23C 14/04 - Coating on selected surface areas, e.g. using masks

Abstract

Disclosed is a DLC film and a method for forming said film wherein the formation of a protective film having a segmented shape is easy, quality control of the protective film is improved, segmented shapes having a high degree of freedom (that are complicated) are possible, and the application is possible not only to two-dimensional shapes but also to three-dimensional shapes. When forming on a substrate a protective film having a segmented shape formed by depositing film such that the film is formed divided into segments, the protective film and the method for producing same are characterized by the substrate being masked using a drawing material so as to obtain segments having a predetermined shape, thereafter, the protective film being deposited, and the masked portion being removed, forming a gap being between segments.

IPC Classes  ?

• C23C 16/04 - Coating on selected surface areas, e.g. using masks
• B32B 3/30 - Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shapeLayered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layerLayered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shapeLayered products comprising a layer having particular features of form characterised by a layer with cavities or internal voids characterised by a layer formed with recesses or projections, e.g. grooved, ribbed
• C23C 14/04 - Coating on selected surface areas, e.g. using masks

Abstract

Disclosed are a diamond-like carbon film forming apparatus and a method for forming a diamond-like carbon film. The diamond-like carbon film forming apparatus employing a plasma chemical vacuum deposition method includes a single-pulse DC power supply (6) and a superimposing DC power supply (26), and/or a high-frequency power supply (7)for performing application between a member (4) having a base (2) encompassed with a conductive mask material (3) and a wall of a chamber (5) of the diamond-like carbon film forming apparatus, wherein a negative single pulse voltage from the single-pulse DC power supply (6) and the superimposing DC power supply (26), or a high-frequency voltage from the high-frequency power supply (7) is selectively applied to the member (4) to form a diamond-like carbon film of segment structure on the base (2) encompassed with the mask material (3).

IPC Classes  ?

• C23C 16/27 - Diamond only
• C23C 16/44 - Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating
• C23C 16/505 - Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating using electric discharges using radio frequency discharges
• C23C 16/515 - Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating using electric discharges using pulsed discharges