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Actor Marlon Brando has four patents, all named "Drumhead tensioning device and method."
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| Number | Title | Issue Date |
| 7927221 | Tool and method for the production of a thread The tool for the chipless production of a thread, in particular for producing an internal thread, is in its forming height, pitch of the pressing lands and/or pressing surfaces adapted to the material of the workpiece in a special manner. ... | 04/19/2011 |
| 7815512 | Thread forming tap and method for manufacturing the same A following margin of a following flank of an external thread is shifted more in a screw-rotation direction than a leading margin of a leading flank. Thus, during biting, the following margin bites first, thereby suppressing a force that pushes back a tap and reduci... | 10/19/2010 |
| 7575520 | Tap and a method of tapping The present invention provides a tap (10) adapted for formation of female screw-threads in a plurality of metal parts. Each female screw-thread is capable of imparting translational motion to a threaded second member engaged therewith, the threaded second mem... | 08/18/2009 |
| 7399231 | Tool and method for producing a thread in a tool The tool for producing a screw thread in a workpiece comprises a) at least one thread-producing region, which comprises a1) at least one thread-milling region, which operates by removing material, as well as a2) at least one th... | 07/15/2008 |
| 7354350 | Tools and methods for finishing a previously created thread without cutting Implementations of the present invention include a thread-rolling tap, which is designed and intended for the non-cutting finishing of a previously created thread, in particular internal thread. For example, one implementation of such a tool includes at least one th... | 04/08/2008 |
| 7247099 | Screw with a partially hardened functional tip and process for the production thereof In a process for the production of a screw comprising a low-alloy carbon steel, having a head, an adjoining holding portion and a functional tip which, in the outer region of limited radial depth, is of a greater hardness than the holding portion, in which the screw... | 07/24/2007 |
| 7214019 | Self-tapping screw A self-tapping screw having a boring part and a threaded shaft for fixing a panel-type object to a preferably metallic substructure is provided. The screw is configured in such a way that it produces a through hole in the panel type object, said hole accommodating t... | 05/08/2007 |
| 7179036 | Fastening arrangement employing thread-forming screw A fastening arrangement comprising a thread-forming lobular screw and a member defining a non-tapped pilot hole therein. The screw has a shaft and a head joined to a proximal end of the shaft, the shaft defining a plurality N of lobes circumferentially spaced about ... | 02/20/2007 |
| 7150588 | Thread forming tap with a non-circular cross-section and radially extending cutting edges A thread-forming tap includes an elongated body having, at first end, a connector portion, and having at a second end, a thread-forming portion. The thread-forming portion includes at least one thread-forming helical thread exhibiting a non-circular cross-section ha... | 12/19/2006 |
| 7114891 | Thread forming tool with annular ridge A thread forming tool includes an elongated body defining a longitudinal center axis. The body including a thread forming portion formed by one or more annular ridges oriented perpendicular to the axis. The body has a non-circular shape in a cross sectional plane or... | 10/03/2006 |
| 7112143 | Thread former or tap Cold thread forming tap or screw tap with a shaft, said shaft having a chuck portion at the one end and a forming or cutting profile portion on the other end, the forming or cutting profile portion being realised as a separate profile element and being fixable centr... | 09/26/2006 |
| 7108607 | Helical groove fasteners and methods for making same Helical groove fasteners and methods for producing the same are provided for use in systems requiring fluid passage through the fastener. In one embodiment, the fastener includes a shank, a head, a threaded portion, and at least one groove extending through at least... | 09/19/2006 |
| 6688988 | Looking thread cold forming tool A thread forming tap comprising a shank section, a body section extending longitudinally from the shank section, a helical thread formed on the body section having radially converging flank portions and an undercut ramp formed in at least one of said flan... | 02/10/2004 |
| 6685573 | Thread forming tap A thread forming tap which is capable of reducing tapping torque as well as improving durability by avoiding an increase of an apparent area of margins of external thread that causes interference with a grinding stone. The thread forming tap has an extern... | 02/03/2004 |
| 6514148 | Thread rolling tap A thread rolling tap including a stem portion, and a thread forming portion having a body with a plurality of thread turns formed on the body and including a front entrance region and a guide region, with the thread turns having each, in the front region ... | 02/04/2003 |
| 6353989 | Method of making recesses in metallic workpieces for use in torque transmitting apparatus A selected portion of a surface of a metallic workpiece such as the end surface of a tubular workpiece, is provided with one or more recesses by resorting to a tool having a preferably pointed tip and being driven into the surface to displace the material... | 03/12/2002 |
| 6217267 | Cold forming tap having internal finish cutting edge and method of producing the same A cold forming tap with an internal finish cutting edge includes an external thread portion having radially outwardly protruding portions and relief portions which are alternately located in a helical direction in which an external thread extends. The pro... | 04/17/2001 |
| 5035019 | Cold-forming tap A cold-forming tap is disclosed with a triangular-shaped body when viewed on end with concentric threads cut into the corners of the triangular-shaped body.... | 07/30/1991 |
| 4826377 | Self-locking fastener and tool for making same A self-locking fastener includes a male member, such as a bolt, having a standard, helical, male thread of constant diameter which is deformed by the special female locking threads of a female member, such as a nut. The female threads are defined by leadi... | 05/02/1989 |
| 4645396 | Wood-metal drill screw There is disclosed screw adapted to fasten two or more juxtaposed workpieces which comprises a threaded shank defining an axis and a major thread diameter. A drilling tip is provided which extends from the shank and includes a pair of cutting edges. Mater... | 02/24/1987 |
| 4539832 | Hole sizing tool A hole sizing tool uses a swaging tap to move material which deforms the sides of a generally cylindrical hole toward the axis of the cylinder and is followed by a portion of the tool having a generally flat flaced helical spiral configuration with the tu... | 09/10/1985 |
| 4534690 | Assymetrically shaped thread forming screw and method of making same A thread forming screw made from a blank which has a tip with an assymetrical cross-section comprised of two oppositely disposed inner surfaces which gradually merge with two oppositely disposed outer surfaces. The inner surfaces may be arcuate or general... | 08/13/1985 |
| 4491002 | Method for forming on workpiece resilient thread having closed helical cavity inside the thread A method of forming on a workpiece a resilient thread, having a closed helical cavity inside the thread, includes plastic deformation of the walls of a preformed helical groove whose depth exceeds the depth of the roots of the thread to be obtained. The v... | 01/01/1985 |
| 4486135 | Tapping screw A tapping screw in which a shank includes a main shank portion having a substantially uniform diameter and a reduced diameter shank portion having a substantially rounded triangle shaped cross-section. Tapping is carried out by the apexes of the rounded t... | 12/04/1984 |
| 4409698 | Tap for pressing elastic thread profiles The tap comprises a groove forming portion (1) with a shank (2) having a thread forming portion (3) such that the thread pitch thereof is equal to that of the groove forming portion (1), the crests of the thread forming portion (3) being axially displaced... | 10/18/1983 |
| 4351626 | Self-locking threaded fastener A self-locking fastener combination is provided with a thread construction having a thread which deforms to securely lock the fastener when a set of male and female members are threaded together and is reformed upon unthreading of the members to allow sub... | 09/28/1982 |
| 4315340 | Method and apparatus for making a self-thread creating fastener A thread forming screw having a helical thread and a tapered lead-in section with a polygonal cross section is formed from a conventional blank by rolling the blank between a pair of thread rolling dies having means thereon to form alternating convex lobe... | 02/16/1982 |
| 4271554 | Combination drill and tap tool An elongated rectilinear tool for formation of a threaded hole in ductile metal by the coining or flowing of the metal. The tool typically is employed to form through threaded holes in a piece of ductile metal, and features a working end having a boring t... | 06/09/1981 |
| 4259889 | Thread tapping form An improved thread tapping form is used to form an internal thread convolution in a member. The thread tapping form includes a plurality of projections which are disposed on a shank having a circular cross sectional configuration. Each of the thread formi... | 04/07/1981 |
| 3942406 | Slab-sided self-tapping screw A self-tapping fastener and method of manufacture wherein said fastener is provided with a unique tapping section, in addition to a driving head and an intermediate threaded portion of generally conventional design. The tapping section is defined by a plu... | 03/09/1976 |
