Did You Know...
...that power steering was invented by independent inventor Francis W. Davis? As chief engineer in the 1920s of the truck division of the Pierce Arrow Motor Car Company, he saw how hard it was to steer heavy vehicles. So that he would be able to keep the profits from his future invention, Davis left his job, rented a small engineering shop in Waltham, Mass., and developed a hydraulic power steering system that led to power steering.
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| Number | Title | Issue Date |
| 8022281 | Shell for drum and drum using the same A shell for drum according to the present invention includes a laminated plywood-panel including a plurality of single-panels having different densities, the plurality of single-panels being jointed in decreasing order of density from a center portion in a thick dir... | 09/20/2011 |
| 7816597 | Drum pad and manufacturing method thereof A drum pad has a knitted material that is strechable and has a top surface to be beaten by a stick and a rear surface opposite to the top surface, a resin member that is strechable and thinner than the knitted material and that is capable of being thermally fused an... | 10/19/2010 |
| 7795519 | Enhanced low-noise drum tympan An enhanced low-noise drum tympan comprises at least two net bodies which are combined to a drum frame; the net bodies being combined by adhesive and being rolled as an integral body. The net bodies are selected from knitted fabrics nets, woven fabrics nets or the c... | 09/14/2010 |
| 7439432 | Pad for electronic drum and electronic drum An electronic drum comprises a pad comprising a body portion made of a polymeric elastic material such as a rubber or a thermoplastic elastomer, and a surface layer portion which is bonded with the body portion so as to cover the body portion, the surface layer port... | 10/21/2008 |
| 7429698 | Acoustic practice percussion instrument and practice kit An acoustic percussion instrument and percussion set containing the instrument. The instrument includes a hollow cylindrical shell having a first end and a second end and an inside cylindrical surface. A first substantially rigid plate having an outside surface and ... | 09/30/2008 |
| 7385135 | Electronic percussion instrumental system and percussion detecting apparatus therein An object of the present invention is to provide a percussion detecting apparatus, which is excellent in percussion feeling, and the percussion sounds of which are very small, in electronic percussion instrumental system. The percussion detecting apparatus is provid... | 06/10/2008 |
| 7351898 | Color-guiding music teaching system including practice pad, pitch plates, percussion targets & lesson book assembly and method A Color-guiding Music Teaching System including practice pad, pitch plates, percussion targets & lesson book assembly and method is disclosed. The teaching method enables young students to learn music much faster than before by creating an association between musica... | 04/01/2008 |
| 7319184 | Percussion instrument In a percussion instrument such as a drum, conga, bongo or the like, comprising a resonance body and a skin that is stretched over a top opening of the resonance body and has an imprint, it is provided that the skin (3) is transparent or semi-transparent and ... | 01/15/2008 |
| 7291776 | Adjustable venturi for a drum A vent for a drum or drum head is provided. The vent includes a valve which is mounted on the side of the drum or drum head which can be adjusted between fully open and fully closed positions and may provide a range of settings between those two positions. A number ... | 11/06/2007 |
| 7256342 | Sound pickup device for percussion instrument A sound pickup device, which is arranged in proximity to a percussion instrument (e.g., a bass drum), comprises a diaphragm stretched under tension over an opening of a shell having a cylindrical shape, and an electroacoustic transducer arranged inside of the shell.... | 08/14/2007 |
| 7244883 | Drum container A drum including a cylindrical shell having an upper edge defining an open top end, and a lower edge defining an open bottom end; a drum skin disposed over the top end; a plurality of lugs mounted on an outer surface of the shell in positions annularly spaced adjace... | 07/17/2007 |
| 7214867 | Drumhead tone control device A drumhead tone control device employs an annular configuration of polyester film tightly adhered to the periphery of a drumhead membrane. The annular configuration of the tone control device includes radial and/or circumferential relief. The relieved tone control d... | 05/08/2007 |
| 7179985 | Hybrid electric/acoustic percussion instrument A hybrid electric/acoustic percussion instrument and percussion set containing the instrument. The instrument includes a hollow cylindrical shell having a first end and a second end and an inside cylindrical surface. A first substantially rigid plate having an outsi... | 02/20/2007 |
| 7156598 | Waffle stud for insert molded plastic members A fastener is configured for use in the manufacture of molded plastic components that will be subsequently attached to other components by the fastener. The low profile head portion of the fastener has a rounded contoured and convoluted top surface to facilitate the... | 01/02/2007 |
| 7074994 | Tunable drumhead An improved drumhead comprising a substantially annular hoop having a generally planar upper member spaced apart from a generally planar lower member, a circumferential inner rim and a circumferential outer rim. Also provided is a film material or membrane for const... | 07/11/2006 |
| 7074996 | Drum head assembly and method of tensioning a drum head There is provided a drum head assembly. The drum head assembly has an outer member and an inner member. The outer member has an L-shaped step on its inside surface with posts extending outward from the base of the step. The depth of the inside edge of the outer memb... | 07/11/2006 |
| 7009099 | Drum counterhoop A counterhoop formed by bonding a conventional flat shaped hoop with a resilient shell component comprised of a convex outer wall and a generally flat inner wall. The resilient begins as a liquid resin, which is poured into an annular mold. The metal counterhoop is ... | 03/07/2006 |
| 6949701 | Drumhead A drumhead for use in a percussion instrument is composed of multiple (e.g., two or three) plies of synthetic resin films, which are laminated together and are brought into close contact with each other when stretched across the opening of a hollow cylinder of a dru... | 09/27/2005 |
| 6927330 | Drum with modulated acoustic air vent A tunable drum is shown having a hollow drum shell, and imperforate drumheads closing the ends of said drum shell. One or more opening extend through the drum shell for acoustic venting, and valves are provided for adjusting the size of the openings to vary the amou... | 08/09/2005 |
| 6921857 | Electronic percussion instrumental system and percussion detecting apparatus therein An object of the present invention is to provide a percussion detecting apparatus, which is excellent in percussion feeling, and the percussion sounds of which are very small, in electronic percussion instrumental system. The percussion detecting apparatus is provid... | 07/26/2005 |
| 6909040 | Low cost musical quality hand drum The present invention relates to a musician quality hand drum that may be produced in a simplified and economical manner. The hand drum is simplified in that it utilizes a ring interconnected within an open end of a simple tubular shell to allow a musical quality dr... | 06/21/2005 |
| 6838606 | Drum having decorative heads A drum includes a shell with two heads fixedly connected to two opposite ends of the shell by two counterhoops. Each head includes a base, a decoration layer on the base, a protection layer on the decorative layer and a durable layer on the protection layer. The dur... | 01/04/2005 |
| 6762353 | Percussion instrument head A percussion instrument head is composed of a synthetic resin film (e.g., a PET film) having a prescribed thickness, which is subjected to chemical etching using a prescribed solution (e.g., an alkali solution), thus processing at least one surface thereof to be rou... | 07/13/2004 |
| 6756535 | Electronic percussion instrumental system and percussion detecting apparatus therein An object of the present invention is to provide a percussion detecting apparatus, which is excellent in percussion feeling, and the percussion sounds of which are very small, in electronic percussion instrumental system. The percussion detecting apparatus is provid... | 06/29/2004 |
| 6700044 | Adjustment assembly for a musical drum A blocking member provides for selective restriction of a passageway on a membrane of a musical drum to adjust an audio output from the musical drum. The blocking member may be rotationally affixed to the musical drum or may be temporarily positioned ther... | 03/02/2004 |
| 6525249 | Drumhead and muting structure for acoustic and electronic percussion instruments An acoustic drum or electronic percussion instrument is constructed by a drumhead corresponding to a punching sheet on which plenty of apertures are formed and a cylinder covered with the drumhead being stretched under tension as well as a muting structur... | 02/25/2003 |
| 6518490 | Drum head with sound attenuating center coating A sound attenuating drum head that has a support ring, a synthetic membrane carried by the ring, a localized thin coating on the membrane, and acting to attenuate vibration of the head, when struck, that coating confined on a mid-region of the head.... | 02/11/2003 |
| 6380468 | Drum having shell consisting of more than one kind of vibratory element arranged in parallel with respect to skin Skins are stretched over circular apertures of a composite shell, and are fastened to the composite shell, wherein the composite shell has a monolithic woody cylindrical member and metallic bars embedded in the monolithic woody cylindrical member in such ... | 04/30/2002 |
| 6365812 | Drumhead material and method A drum head material is prepared by assembling a multi-layer laminate comprising upper and lower sheets of resilient, polymeric film and at least two oriented fiber layers positioned between said sheets. Each of the oriented fiber layers comprises paralle... | 04/02/2002 |
| 6297177 | Drumhead construction A drumhead lamination comprising upper and lower layers of synthetic plastic sheet materials and a layer of impregnated polyester or natural fabric sheet material sandwiched in between the systhetic plastic layers. A substance employed to impregnate the f... | 10/02/2001 |
| 6284959 | Practice percussion assembly A practice percussion assembly in the form of a practice drum kit is provided. The assembly includes a main member having a main surface made of a first percussion material and at least one subordinate, preferably smaller, member having a subordinate surf... | 09/04/2001 |
| 6271458 | Electronic percussion instrumental system and percussion detecting apparatus therein An object of the present invention is to provide a percussion detecting apparatus, which is excellent in percussion feeling, and the percussion sounds of which are very small, in electronic percussion instrumental system. The percussion detecting apparatu... | 08/07/2001 |
| 6242679 | Multimembrane percussive instrument and a method for mounting multiple drum heads A percussive instrument comprises two shells, each having open ends. The shells are positioned substantially end to end. Drum heads are positioned at the opposing open ends and between the two shells.... | 06/05/2001 |
| 6215053 | Variable-thickness snare-side drumhead A snare drum snare-side drum head having regions of different vibratory characteristics, as by differing thicknesses, to produce a low-end, or darker, tone in association with the sharp, snap tone of the traditional snare drum.... | 04/10/2001 |
| 6184451 | Laser cutting of hand drumhead A two ply, synthetic drumhead for use in hand drums is created by using a laser to precisely remove excess material in the form of V-shaped notches from the peripheral portion of each layer disc of drumhead material prior to bonding and forming the drumhe... | 02/06/2001 |
| 6175068 | Drumhead A head of a drum or similar kind of musical instrument comprising a synthetic plastic sheet material containing surfaces with variegated color shadings to give the texture and appearance of a natural animal skin. A method of manufacture of the improved dr... | 01/16/2001 |
| 6150594 | Drumming apparatus The present invention is a drumming apparatus or percussion instrument used for drumming comprising a drum and drum sticks. The drum comprises a plastic bucket shaped shell covered with a soft felt material and each drum stick comprises a cylindrically sh... | 11/21/2000 |
| 6121538 | Electronic percussion instrumental system and percussion detecting apparatus therein An object of the present invention is to provide a percussion detecting apparatus, which is excellent in percussion feeling, and the percussion sounds of which are very small, in electronic percussion instrumental system. The percussion detecting apparatu... | 09/19/2000 |
| 6057499 | Dual function percussion instrument A double-headed musical percussion instrument comprises a quick removable substitute drum head mounted at one end of a drum shell and adapted to closely emulate the sound of a conventional drum while at the same time providing the structural rigidity requ... | 05/02/2000 |
| 5962798 | Percussion instrument In a percussion instrument, for example in the form of a tambourine, of bongos, congas or the like, with a resonance body open in particular on top, a skin being stretched over the upper opening and comprising a plastic film which is fixed at a constant t... | 10/05/1999 |
