Patents Assigned to Cefilac
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Patent number: 4701234Abstract: The process of the invention concerns the manufacture of an interposed support of semipermeable microfiltration membranes, the support composed of a permeable mesh and a sealed border of elastomeric material. After deposition of an elastomeric film on a transfer support 2, the assembly which is obtained is cut into one or more elements 3 reconstituting the border; this or these elements 3 are applied on the mesh with their support(s) 2 and the elastomer is turned toward the mesh; then the mesh thus equipped is treated with pressure at a temperature of between 100.degree. and 150.degree. C. to cause the elastomer to penetrate into the mesh and to obtain a smooth border surface on each side of this mesh, allowing for a sealed joint. The product which is obtained is applied to the manufacture of microfiltration units, whether it has to do with ultrafiltration, with gas permeation or with hemodialysis.Type: GrantFiled: April 10, 1986Date of Patent: October 20, 1987Assignee: CefilacInventors: Jean Rogemont, Andre Nouvet
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Patent number: 4624465Abstract: A pneumatic safety seal joint, made of elastomer, generally designed to be installed in a slot or groove, this joint having an inflatable internal volume under the pressure of a fluid, and an external seal surface. The joint has an internal volume with maximum internal width l and a maximum internal height H and has an internal sealed septum which divides the internal volume into two chambers, each with a means for pressurization. This internal septum is connected to the lateral walls of the joint such that the respective volumes of the two chambers are in a ratio between 0.9 and 1.1 and when l/H is between 1 and 2, the developed width L of this sealed septum is between 1.1 times and 1.4 times l, when l/H is between 2 and 8, the developed width L is such that 1.ltoreq.L.ltoreq.1.21. In case of the puncturing of one chamber the internal septum deforms and comes to press against the wall to be sealed, maintaining the seal.Type: GrantFiled: August 26, 1985Date of Patent: November 25, 1986Assignee: CEFILACInventor: Jean Rogemont
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Patent number: 4381869Abstract: Flexible joint with two sealing lines having curvilinear portions, wherein it comprises two closed elementary joints of different length, whose axes are arranged in the same plane, joined together by a shaping template which cooperates at least with the outer joint by excrescences arranged on the outer periphery of the template and defining between them recesses at least level with the curvilinear portions of the joint, each excrescence having a groove in which is received the outer joint, each of the joints having an inner spring with contiguous turns closed on itself and at least one metal casing in which is fitted the spring.The invention more particularly relates to the construction of non-circular joints.Type: GrantFiled: January 22, 1981Date of Patent: May 3, 1983Assignee: Societe Cefilac, Joints FargereInventors: Claude Abbes, Fernando Martinez, Christian Rouaud
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Patent number: 4247510Abstract: The invention relates to a method and apparatus for manufacturing bands of elastomeric or thermosetting material of the type used in making impervious seals and gaskets. The process consists in molding or injecting at ambient temperature the elastomeric or thermosetting material in the viscous state into a molding cavity on a support which, compared to the material being deposited, has an adherence that is greater than that of the molding cavity. Subsequently, the deposited material is vulcanized or polymerized into the desired band configuration.Type: GrantFiled: December 10, 1979Date of Patent: January 27, 1981Assignee: CefilacInventor: Jean Desverchere
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Patent number: 4151461Abstract: The invention relates to a tester of dry dielectric strength of the insulating sheath of an electric cable comprising a source of high alternating voltage applied between the core of the cable connected to ground and the external surface of the sheath, in which electrical contact with the sheath is provided only by means of a tube surrounding the cable and filled with an ionized atmosphere, the tension required for ionization being supplied by a generator which is independent of the measuring circuit.Type: GrantFiled: January 16, 1978Date of Patent: April 24, 1979Assignee: CEFILACInventor: Gilbert Pontre
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Patent number: 4106163Abstract: A nonwoven uniform web is formed from particulate material and a binding agent in a moving conveyor belt. The material is fed to the belt through a cowl in a random fashion and air is removed from the material; the layer of material is subsequently thinned by a peak removal device and is precalendered, rolled and then heated to activate the binding agent. The resulting web has similar mechanical properties in length direction and width direction, and has a high elastic recovery.Type: GrantFiled: July 28, 1976Date of Patent: August 15, 1978Assignee: CefilacInventor: Jean Desverchere
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Patent number: 4103568Abstract: A modular kinematic chain for transmitting a torque, with slip and speed reduction, to a member which is rotated. The kinematic chain comprises; at least one motor-coupling group consisting of a standard motor and a hysteresis coupling means with permanent magnets, at least one reducing cell coaxial with the output shaft of the motor-coupling group, and a basic reducing mechanism including a casing containing at least two holes for selectively mounting either a motor-coupling group, possibly associated with a reducing cell, or a closure.Type: GrantFiled: December 2, 1976Date of Patent: August 1, 1978Assignee: CefilacInventors: Michel Berard, Andre Lecoustey
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Patent number: 4091161Abstract: A nonwoven uniform web is formed from particulate material and a binding agent in a moving conveyor belt. The material is fed to the belt through a cowl in a random fashion and air is removed from the material; the layer of material is subsequently thinned by a peak removal device and is precalendered, rolled and then heated to activate the binding agent. The resulting web has similar mechanical properties in length direction and width direction, and has a high elastic recovery.Type: GrantFiled: January 30, 1976Date of Patent: May 23, 1978Assignee: CefilacInventor: Jean Desverchere
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Patent number: 4089681Abstract: The invention relates to a process for manufacturing products such as bars, sections, strips, weldless tubes made of ordinary or alloyed steel, starting from an iron ore, without passing through the liquid state.This process consists in:A pre-reduced concentrated iron ore with a non-reducible oxide content of less than 1% is prepared,A homogeneous mixture of this ore is made with a lubricant, a binder and a carbonized reducer,A slab of this mixture is compacted and a complete reduction is carried out on this compacted slab under a neutral or reducer gas flow of between 1100.degree. and 1350.degree. C in order to obtain a porous steel slab,The hot slab leaving the furnace is transformed by extrusion, rolling or forging.The invention enables products of accurate analysis to be obtained with simplified installations of average capacity.Type: GrantFiled: February 3, 1977Date of Patent: May 16, 1978Assignee: CefilacInventor: Andre Louis Gueussier
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Patent number: 4073160Abstract: A high performance coupling intended to transmit a torque from a motor element to a driven element, each of the two elements having at least two teeth symmetrical in relation to the axis of rotation and having generatrices parallel to this axis, each tooth being constituted by flat surfaces symmetrical in relation to their bisecting plane and being connected by curved surfaces, characterized in that each tooth is provided with at least four flat surfaces, with at least two drive generatrices for a given direction of rotation and with at least two different angles of attack. This new coupling finds its application in the field of screws and nuts, and the corresponding spanners, and also for transmission connections and couplings and the necessary tools.Type: GrantFiled: August 3, 1976Date of Patent: February 14, 1978Assignee: CefilacInventor: Claude Perret
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Patent number: 3950576Abstract: Impregnating porous material such as sealing materials by introducing a viscous liquid impregnating material under high pressure into the surface of a limited zone of said porous material.Type: GrantFiled: April 15, 1974Date of Patent: April 13, 1976Assignee: Societe Anonyme dite: CefilacInventor: Jean Desverchere