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45 results about "C sections" patented technology

Continued. Although C-sections can offer conveniences, they also carry risk. "Women really need to understand that a C-section is major abdominal surgery," says Jan Kriebs, a certified nurse mid ...

Method of making a frame member into U-section and C-section panel profiles

This invention relates to metal framing (2, 3, 4), in particular steel framing for building construction. The invention also relates to a method of constructing a metal frame assembly (2, 3, 4) and roll forming apparatus (41) for producing metal framing for building construction. The individual components of the metal frame (2, 3, 4), and assembly made from these components is adapted to provide for a substantially even planar surface without deformations, to which a cladding may be attached with a preferred even finish. The invention also includes roll forming apparatus (41) adapted for producing metal framing (2, 3, 4) of this type, and particularly adapted to produce metal frame members (2, 3, 4) having a predominantly C-section profile (7), with one or more portions of a U-section profile (9, 6), the U-section (9, 6) and C-section (7) profiles formed simultaneously on the same sheet metal strip (43). The apparatus (41) is also adapted to form narrowing or swaging of the channel at same or all U-section portions (6). The overall method of constructing a building frame assembly of the invention includes recording data defining a unit area in which a frame assembly is to fit, processing the data to design a frame assembly to fit that unit area, and controlling operation of roll forming apparatus (41) by a computing means using the processed data, to produce frame members (2, 3, 4) cut and formed ready for assembly to produce the required design of frame assembly.
Owner:FRAMEMAX INC

Forming apparatus for precambered metal sections

A forming apparatus (50) includes a roll former (51) operative to roll form a metal strip (100) to form a profiled metal section (10) of generally C section profile including a pan (12) and a pair of upstanding edge margins (14 and 16). The section profile incorporates a longitudinal precamber which is introduced by the forming apparatus by incorporating a prestretching apparatus (52) upstream from the roll former (51), and a bending apparatus (53) located downstream of the roll former (51). The prestretching apparatus differentially stretches the metal strip (100) in its longitudinal direction so as to form portions (101, 102), which are more elongated than a laterally adjacent portion (103) of the strip (100). The differential stretching compensates for longitudinal shortening of the metal strip in forming the profiled section in the roll former (51). The bending apparatus (53) uses a (3) point bending process and includes a reaction stage (60), a fulcrum stage (61), and an action stage (62). The action stage (62) which induces loading onto the profiled section (10) so as to bend the section about the fulcrum stage (61) is incorporated with the shearing assembly. A method of forming a metal section from sheet metal strip is also disclosed. In a further aspect a shearing assembly is disclosed which is height adjustable and which also includes a cutting element (77) and shearing block (78) which are pivotally mounted to an assembly frame (74).
Owner:BLUESCOPE STEEL LTD

Curved surface space pipe truss structure and mounting method thereof

ActiveCN105780995AAdvantage structureMerit methodBuilding roofsGirdersC sectionsMechanical equipment
The invention relates to a curved surface space pipe truss structure. The curved surface space pipe truss structure comprises a rectangular A section roofing truss frame, a sector shape B section roofing truss frame and a sector shape front C section roofing truss frame and is characterized in that the sector shape B section roofing truss frame is arranged at the middle of the curved surface space pipe truss structure, and a sector handle part of the sector shape B section roofing truss frame is connected with the rectangular A section roofing truss frame; a sector front part of the sector shape B section roofing truss frame is connected with the sector shape front C section roofing truss frame, wherein the rectangular A section roofing truss frame is formed by connecting two crossed truss frames, and the rectangular A section roofing truss frame and the sector shape B section roofing truss frame are supported by a plurality of standing columns (1) which are perpendicular to the ground, and the level elevation of the top of the A section roofing truss frame and the top of the B section roofing truss frame is greater than or equal to 15m; the sector front part is connected with the sector shape front C section roofing truss frame and is supported by the jointed supporting of the standing columns (1) and oblique columns (7). According to the curved surface space pipe truss structure and the mounting method thereof, methods of assembling roof truss frames on the ground and whole-section hoisting are adopted, and the curved surface space pipe truss structure has the advantages of being succinct and convenient to construct, and short in construction period, the construction quality is easy to guarantee, the amount of large-scale mechanical equipment is reduced, and the construction cost is reduced.
Owner:MCC5 GROUP CORP SHANGHAI

Anticompress and anti-bending shouldered hook-shape teeth screwed connection structure

The invention provides a hook-tooth thread connecting structure with resistance to compression and bending, comprising a coupling B with inner thread at two ends, conical sealing surface and torque shoulder and an annular tube A with outer thread at two ends, conical sealing surface and torque shoulder, wherein the outer thread of the end of annular tube A is screwed with inner thread of the end of coupling B by hook-tooth thread, D section of inner thread of the end of coupling B is provided with inner torque shoulder and inner sealing conical surface, C section of outer thread of the end of annular tube A is provided with outer torque shoulder and outer sealing conical surface, and the inner sealing conical surface of the end of coupling and the outer sealing conical surface of the end of annular tube respectively contact the outer and inner torque shoulder. The hook-tooth thread has the advantages that the connecting structure has good property with high-pressure and high bending load, achieves the same compression and collapsing strength with the tube body and realizes the optimizing main sealing surface of metal to metal to achieve higher and more reliable air-impermeability, thereby realizing the non-leaking of gas with high-pressure and high bending load.
Owner:TIANJIN PIPE (GROUP) CORP

Isometric process control method utilizing PVT (pressure-volume-temperature) relation of polymers

InactiveCN102490329AUniform cooling shrinkageReduce warpageC sectionsTait equation
The invention discloses an isometric process control method utilizing PVT (pressure-volume-temperature) relation of polymers. An injection process includes a first step: a PVT curve of an injection molding material is obtained according to the category and the characteristics of the material, an A-B-C-D-E-F process route is obtained from the curve, and an A-B-C section is an injection molding stage; a second step: constant-pressure packing is realized under the maximum packing pressure for a period of time, then isometric packing is carried out, and a C-D section is an isobaric compression stage; a third step: a D-E section is an equal-ratio volume packing stage, a material in a cavity cannot be changed, and cannot backflow or be increased along with reduction of the temperature of the cavity, and packing pressure of melt is obtained by means of calculation by the aid of a Tait equation and physical parameters provided by a PVT database; and a final step: an E-F section is a constant-pressure cooling stage. The constant-pressure packing is realized before the equal-ratio volume packing is realized, the melt is in a flowing state during the constant-pressure packing, accordingly excessively packing alignment is avoided, warpage is low, and quality repeat precision is high.
Owner:BEIJING UNIV OF CHEM TECH

Three-arc harmonic gear slotting cutter and tooth profile design method thereof

The invention discloses a three-arc harmonic gear slotting cutter, and belongs to the technical field of harmonic speed reducer gear machining cutters. A basic tooth profile of cutter teeth is composed of three arc sections which are sequentially tangent. The radius of the upper arc section is rho 1, the radius of the middle arc section is rho 2, and the radius of the lower arc section is rho 3. The invention further discloses a tooth profile design method of the three-arc harmonic gear slotting cutter. Through the tooth profile design method, a flexible gear three-arc tooth profile and a rigid gear three-arc tooth profile which meet the conditions are designed; and on the basis of the obtained rigid gear three-arc tooth profile, the gear meshing kinematics method is adopted, and an A section theoretical conjugate tooth profile, a B section theoretical conjugate tooth profile and a C section theoretical conjugate tooth profile are obtained. Arc fitting is adopted, and the upper arc section Ac1, the lower arc section Ac3 and related parameters of the upper arc section Ac1 and the lower arc section Ac3 are obtained. Through the plane analytic geometry method, the middle arc section Ac2 and related parameters of the middle arc section Ac2 are obtained. Finally, according to the machined harmonic gear technology requirements, auxiliary parameters are determined, and accordingly thepurpose of machining of a work tooth profile of a three-arc harmonic gear is achieved.
Owner:SICHUAN UNIV

Device for cushioning automobile crash by tires

InactiveCN101695922ANo need to change the chassis structureEasy to installAutomatic initiationsC sectionsEngineering
The invention discloses a device for cushioning automobile crash by tires and relates to a scheme for lightening the crash of the automobile industry, particularly to a flat-end van. The device comprises bumpers, a longitudinal beam and tires and is characterized in that the longitudinal beam is provided with a support sleeve; an L-type oscillating bar is installed in the support sleeve, one end of the L-type oscillating bar is articulated with a push rod; the push rod is connected with positioning wheels by a hanging rail fixed on an automobile body, and the positioning wheels are freely connected with the front bumper of an automobile; the other end of the L-type oscillating bar is perpendicularly connected with a spline of a press rod; the proportion of the press rod and the B-C section of the L-type oscillating bar is 1-3:1; the press rod is hung on the automobile body by a spring and articulated with a press block; the center line of the press block is superposed with the circumferential center line of the surface of each tire; the press block is in a triangle, and the lower part is in an inner concave arc and is lined with a rubber layer. The invention has the advantages of novel structure, simple and convenient installation, and the like, reduces the cost and improves the safety without carrying out large structural reformation on the original automobile.
Owner:宋立

Forming apparatus for precambered metal sections

A forming apparatus (50) includes a roll former (51) operative to roll form a metal strip (100) to form a profiled metal section (10) of generally C section profile including a pan (12) and a pair of upstanding edge margins (14 and 16). The section profile incorporates a longitudinal precamber which is introduced by the forming apparatus by incorporating a prestretching apparatus (52) upstream from the roll former (51), and a bending apparatus (53) located downstream of the roll former (51). The prestretching apparatus differentially stretches the metal strip (100) in its longitudinal direction so as to form portions (101, 102), which are more elongated than a laterally adjacent portion (103) of the strip (100). The differential stretching compensates for longitudinal shortening of the metal strip in forming the profiled section in the roll former (51). The bending apparatus (53) uses a (3) point bending process and includes a reaction stage (60), a fulcrum stage (61), and an action stage (62). The action stage (62) which induces loading onto the profiled section (10) so as to bend the section about the fulcrum stage (61) is incorporated with the shearing assembly. A method of forming a metal section from sheet metal strip is also disclosed. In a further aspect a shearing assembly is disclosed which is height adjustable and which also includes a cutting element (77) and shearing block (78) which are pivotally mounted to an assembly frame (74).
Owner:BLUESCOPE STEEL LTD

Steel tube bundle combination structure composed of steel plates and C-sections

The invention discloses a steel tube bundle combination structure composed of steel plates and C-sections. The steel tube bundle combination structure is formed by a steel tube bundle assembly, the steel tube bundle assembly is formed by sequentially connecting a plurality of steel tube units, each of the steel tube units has a cavity, and concrete is cast in the cavity; each of the steel tube units is formed by dividing a web between an upper flange and a lower flange paralleling to the upper flange, each of the upper flange and the lower flange is a continuous steel plate is a continuous steel plate, two end portions of the web have folding segments paralleling to the upper flange and the lower flange and having a same folding direction, and two ends of each of the folding segments are welded to the upper flange and the lower flange respectively; a front web and a lower web, the upper flange and the lower flange enclose to form the steel tube units; and the webs form a separation plate between adjacent steel tube units. In a steel tube bundle combination structural member, the steel tube bundle is made in a factory, and forms an integral body together with concrete cast in the steel tube bundle; and the steel tube bundle combination structural member can be used as a vertical bearing member, and can also be used as a lateral force resistance member.
Owner:HANGXIAO STEEL STRUCTURE
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