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Patent Searching and Data


Matches 651 - 700 out of 8,925

Document Document Title
WO/1992/008916A1
Described is a gasket, in particular a cylinder-head gasket, made of a pressure-resistant, non-deformable material. Unlike prior art gaskets, the gasket described is permanently pre-formed before it is fitted, so that the gasket sealing ...  
WO/1992/005897A1
A gear wheel is formed from a pressed and sintered powder metal blank (2) by surface hardening the tooth, root and flank regions to establish densification in the range of 90 to 100 per cent to a depth of at least 380 microns.  
WO/1992/002319A1
The invention relates to plastic working of metal. The proposed rolling mill comprises a stand (2) consisting of a three-dimensional multisectional trapezoidal structure and a unit for adjusting the gap between the support plates (3 and ...  
WO/1992/002318A1
The invention relates to plastic working of metal. The proposed rolling mill comprises a stationary secured plate (2) with a wedge instrument (3), at least one supporting element (5) and driven carriages (6) which are mounted in the supp...  
WO/1992/001523A1
A method of producing component parts of a fluid chamber wherein the peripheral portion of a steel plate (1) held by a pair of rotary molds is thickened using a roller prior to and for the purpose of forming a seal ring groove (14) in th...  
WO/1992/001165A1
A screw having a main thread (2) to be screwed-in and a sub-thread (3) formed in the direction opposite to the main thread, which is characterized in that a slant surface (3b) of said sub-thread on the screw-loosening side has a sharp sl...  
WO/1991/019059A1
There is disclosed a reinforcing element (10) for reinforcing a solidified fluid mass such as concrete or refractory comprising an elongate shank (12) having a slot (18) extending along at least a portion of the length of the shank. The ...  
WO/1991/018694A1
The invention relates to processing of metals by forging. The proposed line for cross-wedge rolling comprises a mechanism (5) for transmitting the blanks (2) from a heater (3) and placing them under the wedge instruments (18 and 19) of a...  
WO/1991/018693A1
Rotationally symmetrical workpieces (19) are extruded by applying an axial forming force by means of a forming die (1). The die in which the workpiece (19) is formed consists of two ring halves (17, 18) through which the radial forming f...  
WO/1991/012445A1
The side walls of cold-formed pistons for hydraulically operated brakes can be distorted if the forces acting on the piston head are large enough, the piston wall flexing outwards or inwards. The invention describes a piston (1), designe...  
WO/1991/006384A1
A spin molding apparatus, in which a heating means (7) is operatively connected to a pressure spatula (6) with a material (4) to be molded set on a mandrel (3), the material (4) being heated to a predetermined temperature with the heatin...  
WO/1991/000785A1
This invention relates to a sheet metal poly-V-groove-pulley consisting of a cup-shaped material (3) having a circumferential wall (5) formed integrally with and extending at right angles from an end portion of a bottom wall (6), a poly-...  
WO/1990/015679A1
In order to roll a taper on a workpiece, the gap between the rolls of a rolling mill is adjusted during the rolling. A transducer is provided to indicate the extent of the gap between the rolls and, from time to time, the rolls are broug...  
WO/1990/015678A1
When deforming an elongate workpiece (A), as by forging, rolling, or the like, it is necessary to know the exact position of the workpiece along its length with respect to the deforming means. To this end, one end of the workpiece (A) is...  
WO/1990/012175A1
According to a process for the manufacture of a framework (1) for reinforcing concrete structures and, in particular, concrete slab or shell structures in the form of a steel strip (3) with notched or goffered surfaces, a hot laminated s...  
WO/1990/009250A1
A regular or irregular toothed profile or similar is shaped on a pot-shaped sheet metal blank (rough pot) by means of a pair of profiled wheels. To this end, the rough pot is placed in a play-free manner on a spur-toothed wheel with a ne...  
WO/1990/006856A1
According process for automatically matching at least two substantially cylindrical surfaces, engaging each other, particularly for mechanical emboss engraving, the freedom ranges, of a conventional machine, are mechanized and subjected ...  
WO/1990/003233A1
A metal sheet (10) is pre-treated by passing it between two ironing rolls (4, 5) to plastically strain elongated narrow zones thereof in a manner causing localised elongation thereof. Subsequently the sheet is roll-formed to produce fold...  
WO/1990/002315A1
An optical metrological scale (110) is produced by a rolling method, to give a profiled upper scale surface (109) which is imparted by an embossing roller (101). To prevent uneven strains, which could affect the pitch of the scale, the s...  
WO/1989/010805A1
A wire straightener (16) and multiple preform rollers (20) prepare a continuous length wire (14) for further forming by multiple form rollers (24) having multiple spaced apart notches (117) formed in an annular edge (118) of the rollers ...  
WO/1989/005203A1
The invention concerns a device for shaping a pulley blank, in particular for making poly-V profiles. A sheet metal object is surrounded by an annular tool (7) mounted eccentrically on an inner cam located on an outer cam (14). The outer...  
WO/1989/000899A1
A method of making workpieces, for example springs with few leaves, consists in placing a heated workpiece (1) on a calibration die (2) and feeding it into a deformation zone to form an article of a desired profile, the deformation being...  
WO/1988/003450A1
A method for producing the rack of variable ratio rack-and-pinion steering arrangements in which a uniformly toothed pinion meshes with a non-uniformly toothed rack. The rack has a central section (7) of uniform pitch and tooth shape fla...  
WO/1988/002287A1
An apparatus, based on a conventional lathe, for the screening of ink transfer rollers including a rotatable screen forming tool (45) rotatably held above the ink transfer roller (9) by a pivoted arm (26). The arm (26) pivots about an ax...  
WO/1988/001917A1
Since conventional cross roll forging is carried out at a high temperature, decarburization occurs in a chemical reaction due to thermal oxidation, so that the work must be subjected to post-processing. Since, however, the present proces...  
WO/1987/007435A1
A battery receptacle for selectively and alternately receiving a lithium battery (11) which has positive and negative terminals (13) on a first end face (9), and alkaline-manganese batteries (21), each of which includes positive (22) and...  
WO/1986/006443A1
A downhole screw motor comprises a casing (1) containing inside it working organs consisting of two elements: an external one which is made as a bushing (2) with inner spiral teeth (2'), and an internal one which is made as a shaft (3) p...  
WO/1986/004274A1
The method according to the invention relates to the making, without material removal, of grooves such as helical threads on the wall of tubes made of ductile or plastic materials. It consists in operating a knurling roller (11) having a...  
WO/1986/003996A1
A rotary forming machine assembly including a lower base (12) and a pair of spindle housings (14) including front (16) and rear (18) walls. A tool spindle (20) is rotatably mounted between the front (16) and rear (18) walls of each of th...  
WO/1986/002867A1
A method of manufacturing a drill shaped cutting tool which is used to roll a workpiece, such as a wire rod by a rolling die; and a rolling die used for this purpose. This rolling die (201) is provided at at least a portion of a substant...  
WO/1986/002416A1
A fastener having a shank with a relatively abrupt transition (34) from an unthreaded portion (33) to a full thread dimension (35), the thread runout (36) occupying no more than one pitch length of the thread in the axial dimension, and ...  
WO/1986/002296A1
Method and machine for making rotational bodies by plastic deformation with a diameter varying lengthwise. Method wherein, upon rotating the blank, a local pressure is exerted with a progressive increase of force involved at start so as ...  
WO/1986/001753A1
The device is provided for the rolling or pressing of spiral drills from a preheated cylindrical blank (21) by means of squint profiled rollers (15) concentrically distributed at the periphery of the blank, delimiting a calibrated openin...  
WO/1986/001753A2
The device is provided for the rolling or pressing of spiral drills from a preheated cylindrical blank (21) by means of squint profiled rollers (15) concentrically distributed at the periphery of the blank, delimiting a calibrated openin...  
WO/1986/000549A1
This invention is characterized in that, during the manufacture of an integrally-forged light alloy wheel for an automobile, an outer rim (12), which rises from the outer circumference of a disc surface (11), is formed simultaneously wit...  
WO/1986/000554A1
A composite assembly knurling tool for forming uniformly-spaced horizontal serrations continuous across the surface of a metal flake producing drum. The knurling tool comprises an alternating array of spacer (15, 17, 19, 21, 23) and form...  
WO/1985/003114A1
The method for making the failure-resistant damper provides for fabricating a hollow cylindrical blank (1) of which the multilayer wall is provided with an artificial discontinuity (2) taking place at least in one of its layers. The diam...  
WO/1985/002797A1
A apparatus for forming splines in a first portion (22) of a shaft (13) of a workpiece (12) and a thread in a second portion (24) of the shaft (13) which has a smaller cross sectional diameter than the first portion (22), the apparatus i...  
WO/1985/000400A1
A safe security system which includes a key operated time delay lock (10) and a separate key switch (9) thereby requiring two individual keys for the opening of the safe, a dye marking device (20) within the safe, a door switch (23), and...  
WO/1984/000511A1
A wheel (16) of which the periphery is shaped as a profile which is complementary to that of the threading to be surfaced, is used as a cutter for roller burnishing a helical thread. The wheel (16) is idle mounted in rotation about an ax...  
WO/1984/000186A1
Reinforcement of a moldable material by means of fibers comprised of a filiform body provided at each of each ends with an anchoring device consisting of one or a plurality of volumes of any shapes and of which all cross-section dimensio...  
WO/1983/002741A1
For the manufacture of a nut, a piece of plate material which is bent to form a tube (9) can be used. This tube can be placed over a mandrel (8) and clamped together around the mandrel, first by means of a pair of spring-loaded dowels (5...  
WO/1983/001097A1
Nail-type fastener, comprising an elongated shank (1) with a head at one end, and a point at the other end. The nail shank has three symmetrically placed, longitudinal grooves (4) separated by longitudinal ridges (8) with a cross-section...  
WO/1983/000025A1
An automatic rolling train comprises a loading device (1), a rolling mill (4) provided with at least two pairs of tools (9, 11 and 10, 12) located on the opposite sides of the rolled workpieces, a mechanism (14) for feeding the workpiece...  
WO/1982/004207A1
A method of making articles by deformation of cylindrical work-pieces comprises the heating of work-pieces (1), their cross-helical rolling with simultaneous deformation of their butt-end waste parts (3) by means of cutoff blades, subseq...  
WO/1982/000608A1
A cross rolling mill comprises a split casing (1) inside which are mounted parallel plates (4) and (5) provided with wedge-shaped deforming instruments (9) and (10). The upper and the lower parts (2) and (3) of the casing (1) are provide...  
WO1982000109A1
A thread-rolling tool comprises a casing (1) in which, evenly spaced along a circumference, are mounted threading rolls (3), (4), (5) with their axes inclined in relation to the axis of rotation of the casing (1) at an angle equal to the...  
WO/1982/000014A1
A method of obtaining on a workpiece a resilient screw thread with a closed helical cavity inside its profile comprises plastic deformation of the walls of a preliminarily manufactured screw groove with a depth exceeding that of the toot...  
WO/1981/001672A1
The tap comprises a groove-forming stage (1) with a shank (2) carrying a thread-forming stage (3) the pitch of projections of which is equal to the pitch of projections of the groove-forming stage (1), whereas the projections of the thre...  
WO/1981/000365A1
A method of manufacturing a resilient screw thread with a closed helical cavity inside its profile comprises plastic deformation of the walls of a screw groove preliminarily manufactured by means of a thread-rolling tool (2). The screw g...  

Matches 651 - 700 out of 8,925