Rotary Movement Patents (Class 84/390)
  • Patent number: 9153216
    Abstract: A streamlined rotary valve includes a main body with a first, a second, and a third tube. A first casing member includes a first opening, a first and a second air inlet opening, which are in communication with a first accommodation space. The first air inlet opening is connected to an end of the first tube. A manual actuator includes a pressing section, which when pressed, an end of the third tube is set in communication with the first air inlet opening; an opposite end of the third tube in communication with the second air outlet opening; an end of the second tube in communication with the second air inlet opening; and an opposite end of the second tube in communication with the first air outlet opening, thus generates different sound effects. With 72 degrees angle of rotation and adjustable stop elements, the present invention improves speed response and accuracy.
    Type: Grant
    Filed: September 13, 2013
    Date of Patent: October 6, 2015
    Inventor: Simon Olivier T├ętreault
  • Publication number: 20150114203
    Abstract: A valve system for brass instruments comprising mechanically actuated rotary valves rotatably mounted in valve sleeves, and tube sockets for tubes which conduct the air flow in and out and for valve tube loops. The valve system has a milled valve block, in which a bore is arranged which runs through the valve system rectilinearly and with a constant cross section through the valve sleeves, into which bore bores open which run approximately at right angles to said bore and have the same cross section as the valve tube loops. The bores are connected to one another during valve actuation by way of the rotatable valve cylinders and bores arranged therein. The bores run approximately rectilinearly through the valve cylinder and correspond in terms of their cross section to the further bores, and the valve sleeves likewise are milled directly into the valve block.
    Type: Application
    Filed: March 15, 2013
    Publication date: April 30, 2015
    Inventor: Wilhelmus Karolus Sanders
  • Publication number: 20150075353
    Abstract: A streamlined rotary valve includes a main body with a first, a second, and a third tube. A first casing member includes a first opening, a first and a second air inlet opening, which are in communication with a first accommodation space. The first air inlet opening is connected to an end of the first tube. A manual actuator includes a pressing section, which when pressed, an end of the third tube is set in communication with the first air inlet opening; an opposite end of the third tube in communication with the second air outlet opening; an end of the second tube in communication with the second air inlet opening; and an opposite end of the second tube in communication with the first air outlet opening, thus generates different sound effects. With 72 degrees angle of rotation and adjustable stop elements, the present invention improves speed response and accuracy.
    Type: Application
    Filed: September 13, 2013
    Publication date: March 19, 2015
    Inventor: Simon Olivier T├ętreault
  • Publication number: 20140216231
    Abstract: The present invention is an adjustable musical instrument lever that changes the throw, amount of leverage, and amount of resistance the lever incurs when moved. The device also adjusts to accommodate the size of the player's hand. Further, it can be retrofit to many valved musical instruments.
    Type: Application
    Filed: February 3, 2014
    Publication date: August 7, 2014
    Applicant: Michael J. Roberts, Certified Public Accountant, LLC
    Inventor: Michael Olsen
  • Patent number: 8466362
    Abstract: A dual rotor axial-flow rotor valve structure includes a rotor valve seat for rotatably receiving rotatable first and second rotor valves. The rotor valve seat has a first and a second extension sections connected to end sections of a second and a first tuning slide assembly s. The first rotor valve communicates with end sections of first and second flow passages with a mouthpiece and the other end of the second tuning slide assembly and communicate the other end of the second flow passage with the first or second extension section. The second rotor valve communicates ends of the first and second flow passages with the other end of the first tuning slide assembly and a main tuning slide assembly and communicate the other end of the second flow passage with the first or second extension section.
    Type: Grant
    Filed: December 22, 2011
    Date of Patent: June 18, 2013
    Inventor: Kuo-Ming Hsiao
  • Publication number: 20120291609
    Abstract: A dual rotor axial-flow rotor valve structure includes a rotor valve seat for rotatably receiving rotatable first and second rotor valves. The rotor valve seat has a first and a second extension sections connected to end sections of a second and a first tuning slide assembly s. The first rotor valve communicates with end sections of first and second flow passages with a mouthpiece and the other end of the second tuning slide assembly and communicate the other end of the second flow passage with the first or second extension section. The second rotor valve communicates ends of the first and second flow passages with the other end of the first tuning slide assembly and a main tuning slide assembly and communicate the other end of the second flow passage with the first or second extension section.
    Type: Application
    Filed: December 22, 2011
    Publication date: November 22, 2012
    Inventor: KUO-MING HSIAO
  • Publication number: 20120240745
    Abstract: A rotation device is adapted to be installed between the bell of a musical wind instrument and the body of the musical instrument. One or more rotational devices may be controlled by the musician or someone else while the musician is performing and/or playing the instrument. The rotation device may control the speed of rotation, the direction of rotation, and the amount of travel of rotation. The amount of travel of rotation of the bell may be more than and/or equal to and/or less than a 360 degree rotation.
    Type: Application
    Filed: June 5, 2012
    Publication date: September 27, 2012
    Inventor: DONALD ST. GEORGE
  • Publication number: 20110303073
    Abstract: A rotation device is adapted to be installed between the bell of a musical wind instrument and the body of the musical instrument. One or more rotational devices may be controlled by the musician or someone else while the musician is performing and/or playing the instrument. The rotation device may control the speed of rotation, the direction of rotation, and the amount of travel of rotation. The amount of travel of rotation of the bell may be more than and/or equal to and/or less than a 360 degree rotation.
    Type: Application
    Filed: January 10, 2011
    Publication date: December 15, 2011
    Inventor: Donald St. George
  • Publication number: 20100275758
    Abstract: To improve a degree of freedom and certainty of playing over a wide musical range without almost changing fingering of a brass instrument. A valve mechanism (15) to be inserted between a mouthpiece (3) and a bell (5), comprising a main pipe (7) allowing the mouthpiece and the bell to directly communicate with each other, a bypass pipe (9) allowing, by the operation of a changeover valve (26), the main pipe in direct communication before the operation to indirectly communicate through halfway bypassing, a main valve group (21) inserted in the middle of the main pipe, and a sub valve group (31) inserted in the middle of the bypass pipe for serial communication. Since the main pipe when in indirect communication via the bypass valve is set to such a length as to be able to produce sound one octave lower than sound produced by only the main pipe, sound one octave lower can be produced by switching the changeover valve.
    Type: Application
    Filed: November 8, 2007
    Publication date: November 4, 2010
    Inventor: Shiro Satomi
  • Publication number: 20100236379
    Abstract: The present invention provides a valve assembly designed to regulate air flow through a musical instrument and is designed to avoid bumps typically associated with valve construction that result in distortion and other harmful effects on vibrating columns of air that pass there-through. The valve assembly comprises: a cylindrical-shaped valve casing having openings formed therein that define at least one ingress and at least one egress through which vibrating columns of air pass; and a valve piston received within the valve casing and linearly displaceable therein, the valve piston comprising at least one passageway having a cross-section that is open and u-shaped, whereby other passageways formed in the valve piston are bump-free.
    Type: Application
    Filed: June 10, 2009
    Publication date: September 23, 2010
    Inventor: Martin A. Wilk
  • Patent number: 7112735
    Abstract: A valve for use in musical wind instruments, associated musical instruments, and methods of fabricating such valves and musical instruments are provided. An exemplary rotor valve includes a solid rotor body having a first, substantially straight passage defined therein extending from a first opening in a peripheral surface of the rotor body to a second opening in the peripheral surface. Second and third passages are formed and extend from associated openings in the peripheral surface to associated openings in a face surface of the rotor body. The first passage may define a first, primary flow path of the instrument and the second and third passages cooperatively define a second flow path of the instrument, which incorporates an added length of tubing. In one embodiment, an interchangeable tube insert may be installed in the first passage to define flow characteristics in the first flow path.
    Type: Grant
    Filed: June 7, 2004
    Date of Patent: September 26, 2006
    Assignee: S.E. Shires, Inc.
    Inventor: Stephen E. Shire
  • Patent number: 6384306
    Abstract: A wind instrument having a relative pure tone is disclosed. The wind instrument includes a tubular body, a secondary treble key, and a control shaft adapted to be rotated by the secondary treble key. The control shaft is pivotally connected to the tubular body and is securely formed with two spaced transverse pieces having respective apertures defined in alignment. A bar has a pair of opposed, egg-shaped ends, and each of the egg-shaped ends defines a threaded hole therein and a plurality of splits around the threaded hole. A pair of adjusting screws is threadedly engaged with the threaded holes respectively. Therefore, the egg-shaped ends of the bar can be fitted in the apertures of the transverse pieces with no clearance therebetween by adjusting the adjusting screws in the threaded holes carefully.
    Type: Grant
    Filed: April 30, 2001
    Date of Patent: May 7, 2002
    Inventor: Wu-Hong Hsieh
  • Patent number: 6297436
    Abstract: A valve assembly including at least one valve body designed to be mounted on a musical instrument, such as but not limited to a trombone or like “brass” instrument and adapted to regulate air flow through the instrument, between at least a first path of air flow and a second path of air flow each having significantly different lengths, wherein a musician is capable of selectively directing air from the mouth piece or air inlet of the instrument to the air outlet or bell of the instrument along an extended length flow path of the instrument, thereby extending the lower range of the instrument and generating a change in pitch and tonal quality of the musical sound generated.
    Type: Grant
    Filed: December 23, 1999
    Date of Patent: October 2, 2001
    Inventor: Mark Adams
  • Patent number: 6255571
    Abstract: A trombone has a rotary valve unit inserted between two parts of a main tube and further connected to a bypass tube, and a player manipulates the rotary valve unit for changing the length of vibrating air column, wherein the rotary valve unit has a cylindrical casing connected at both end surfaces thereof to the parts of the main tube, a first pair of ports formed on the side surface thereof and connected to both ends of the bypass tube and a second pair of ports, a short tube connected between the ports of the second pair and a rotor rotatable inside the cylindrical casing and having two air passages spaced from one another in the direction of the rotational axis thereof and connecting one of the parts of the main tube through the short tube to the other part at a first angular position and one of the parts through the bypass tube to the other part so that the rotary valve unit is compact.
    Type: Grant
    Filed: March 21, 2000
    Date of Patent: July 3, 2001
    Assignee: Yamaha Corporation
    Inventor: Yoshihiro Takahashi
  • Patent number: 6018115
    Abstract: A low friction vented rotary valve for a brass instrument is disclosed comprising a partially circumferential member providing a low friction engagement with the rotary casing. The partially circumferential member has first, second and third apertures therein with a first tube connected between the first and second apertures and a second tube connected at one end of the circumferential member. The second tube has an arcuate collar at its other end for providing another low frictional surface engaging the rotor casing.
    Type: Grant
    Filed: June 21, 1999
    Date of Patent: January 25, 2000
    Inventor: Brian P. Leonard
  • Patent number: 6018114
    Abstract: A rotary valve is provided for a brass instrument to produce brass sounds of different pitches by changing over a tube length of a resonance tube. Herein, a rotor is inserted in a valve casing. The valve casing has a cylindrical shape whose both ends are openings, wherein ports are formed on a periphery, while the rotor has a cylindrical shape whose outer diameter is slightly smaller than that of the valve casing, wherein two shaft portions respectively project from the end faces of the rotor as its integral parts, and change-over paths are formed on a periphery. An implantation bottom covers one opening of the valve casing, while an implantation upper cover covers another opening of the valve casing. The shaft portions of the rotor are rotatably supported by radial ball bearings respectively. A depression member is inserted between the implantation bottom and radial ball bearing to depress the rotor in its axial direction. An upper cover setscrew fixes the implantation upper cover to the valve casing.
    Type: Grant
    Filed: September 17, 1997
    Date of Patent: January 25, 2000
    Assignee: Yamaha Corporation
    Inventor: Shinji Hamanaga
  • Patent number: 5965833
    Abstract: A rotary valve for selectively inserting and removing a slide loop from the sound path of a musical instrument is disclosed. The valve includes a cylindrical rotor housed in a cylindrical casing coupled to the instrument's lead pipe, main bore and slide loop leading and trailing ends. The rotor has two passages extending through it. The first passage is generally "Y" shaped with two leading ends and a trailing end, while the second passage is generally straight having a leading end and a trailing end. In a first valve position, the first leading end and the trailing end of the "Y" shaped rotor passage coaxially align with the instrument's lead pipe and main bore, respectively, providing an air pathway excluding the additional slide loop.
    Type: Grant
    Filed: September 21, 1998
    Date of Patent: October 12, 1999
    Assignee: United Musical Instruments U.S.A., Inc.
    Inventor: Christian Lindberg
  • Patent number: 5900563
    Abstract: A rotary valve (10) for a brass wind instrument includes a rotor (12) rotatably disposed in a casing (30). Four tube connecters (50) are connected to the casing in fluid-tight connections. Each tube connecter (50) has a passageway (52) therethrough having a constant, circular cross section. The rotar (12) has two ducts (14, 16) therethrough, each having a constant, circular cross section with a diameter (18) equal to the diameter of the passageways (52) through the tube connecters (50). The rotor (12) is selectively rotatable between an unactuated position and an actuated position. When the rotor (12) is in the unactuated position, a single soundpath (70) is formed through the valve. The single soundpath (70) has limited curvature and has a constant diameter. When the rotor (12) is in the actuated position, two soundpaths (72, 74) are formed through the valve (10). The first of the two soundpaths (72) subjects the sound to only a single 45 degree turn through the valve.
    Type: Grant
    Filed: June 12, 1996
    Date of Patent: May 4, 1999
    Inventor: Brian Phillip Leonard
  • Patent number: 5798471
    Abstract: A rotary valve for musical instruments is provided. The valve is specially designed to have three internal passages with gentle curves and continuously circular passageways to provide true tonal qualities and a minimum of distortion. The valve passages have a bend radius of at least the diameter of the valve passage and the casing of the valve approximates three times the diameter of the passages. The valve passages to and from the loop are positioned on opposite sides of and cross over a through passage from the mouthpiece to the bell for economy of space and gentle passage curvature. The inlet and outlet openings or end holes in the loop engaging passages are located approximately 45.degree. from one another along their axes to avoid substantial changes in the direction of air flow. The 45.degree. angle is between diameters of the openings and can also be expressed as 135.degree. around the circumference of the rotor. Continuous flow during valve operation is provided in a modification.
    Type: Grant
    Filed: May 9, 1997
    Date of Patent: August 25, 1998
    Inventor: Robert M. Miller
  • Patent number: 5686678
    Abstract: A rotary valve for a musical instrument includes a cylindrical casing having a sidewall closed at opposite ends thereof, and a rotor mounted within the casing for rotation between unoperated position, in which the main tubing is connected to a further tubing portion, and an operated position, in which a length of extension tubing is connected into the air passageway through the instrument, the rotor including a hollow shell member and rotor primary and secondary airway tubes mounted within the rotor shell member for selectively communicating input and output ports of the valve as the rotor is rotated between its unoperated and operated positions, and a plurality of vent openings in the cylindrical sidewall of the rotor shell member for providing pressure relief areas for air directed into the rotor during rotation of the rotor between its unoperated and operated positions.
    Type: Grant
    Filed: April 24, 1995
    Date of Patent: November 11, 1997
    Inventor: Gary H. Greenhoe
  • Patent number: 5396825
    Abstract: An air flow valve positioned along the air flow path in a wind instrument. The valve includes three air conduits and is shiftable between a first position wherein the air flows substantially straight through the main air passage to the bell, and a second position wherein the air flow is diverted to a slide loop and thence back to the main air passage. The valve includes a manual actuator which is easily accessed by the musician to shift the valve between its first and second positions during playing.
    Type: Grant
    Filed: June 16, 1993
    Date of Patent: March 14, 1995
    Assignee: Selmer Corporation
    Inventor: Herbert L. Kirts
  • Patent number: 5237902
    Abstract: A wind instrument is equipped with rotary valve units or keys for changing the length of vibrative air column, and a link mechanism transmits a lever action to the rotary valve unit or the key, wherein a joint incorporated in the link mechanism comprises a shaft member having an external thread and coupled with the manipulating lever, an adjustable screw member with an internal thread, a tubular member actuating the rotary valve unit or the key and retained by the adjustable screw meshed with the external thread, and an elastic member inserted between a bottom surface of the tublar member and a leading end of the external thread portion so that gaps on both sides of the tubular member are adjustable, thereby allowing the tubular member to smoothly rotate.
    Type: Grant
    Filed: February 4, 1992
    Date of Patent: August 24, 1993
    Assignee: Yamaha Corporation
    Inventor: Shinji Hamanaga
  • Patent number: 5052261
    Abstract: Improved apparatus for providing a chromatic scale with accurate intonation for valved brass instruments is disclosed. Two embodimeents of the invention that compensate for the deficiencies of the valve systems of the prior art are described for both four and five valve systems. For four valves systems, a master valve is used to lower the pitch of the instrument by two tones, and for five valve systems, a master valve lowers the pitch by two and one-half tones. The invention, therefore, makes possible complete compensation over the range of the instrument and improved tone quality.
    Type: Grant
    Filed: January 5, 1988
    Date of Patent: October 1, 1991
    Inventor: Martin Lessen
  • Patent number: 5012714
    Abstract: A brass instrument such as a trombone has a main tube member formed with a main air passage, a plurality of bypassing tube members respectively formed with bypassing air passages, and a plurality of valve units selectively coupling the main air passage to the bypassing air passages for variation in pitch of the sound produced therein, and each of the valve units is provided with two three port valve assemblies linked with each other for simultaneously being shifted between two positions, in which each of the valve assemblies has three ports angularly paced apart from one another by angles of about 120 degrees, so that the valve assemblies are less causative of resistance to the vibratile air column, thereby providing a comfortable feeling to the player.
    Type: Grant
    Filed: September 19, 1989
    Date of Patent: May 7, 1991
    Assignee: Yamaha Corporation
    Inventor: Akihiko Kongou
  • Patent number: 4996902
    Abstract: A musical wind instrument, comprising a cylindrical barrel having an inlet hole (3) communicating with the mouthpiece (1) of the instrument, an outlet hole (5) communicating with the bell (12), a branch hole (6), a return hole (7), the branch hole (6) communicating with the return hole (7) via a circuit (13) for changing of tonality, and means (15, 16) for putting of the inlet hole (3) into communication selectively with the outlet hole (5) or with the branch hole (6), wherein the inlet hole (3) and the outlet hole (5) are at different levels along the axis (X,X') of the barrel.
    Type: Grant
    Filed: January 10, 1990
    Date of Patent: March 5, 1991
    Inventor: Pierre-Marie J. Hulot
  • Patent number: 4972751
    Abstract: A rotary valve for brass wind instruments with improved lubricating and durability properties is provided. The valve body 2 or both the valve body 2 and casing 1 of the rotary valve comprise(s) a machinable ceramic-resin composite material. The rotary valve can be readily produced by a method which comprises impregnating a machinable ceramic article containing substantially continuous micropores with a liquid resin material and hardening the resin material; machine-processing the resulting machinable ceramic-resin composite article into a shape of the valve body or shapes of the valve body and casing; and assembling the valve body into a rotary valve having the valve body 2 of the composite material rotatably contained in the casing 1 of the composite material or a metal material.
    Type: Grant
    Filed: January 19, 1990
    Date of Patent: November 27, 1990
    Assignee: Inax Corporation
    Inventor: Hiroaki Kuno
  • Patent number: 4970932
    Abstract: A rotary valve assembly incorporated in a brass instrument for changing a pitch of a tone comprises a rotary valve housed in a valve casing having two groups of aeroports, and the rotary valve is provided with two air passages, one of which interconnects the aeroports in the first group and the other of which interconnects one aeroport of the first group and one aeroport of the second group, so that various arrangements are possible for the aeroports.
    Type: Grant
    Filed: May 4, 1989
    Date of Patent: November 20, 1990
    Assignee: Yamaha Corporation
    Inventor: Shinji Hamanaga
  • Patent number: 4905564
    Abstract: A rotary valve coupled into the principal sound path of a musical wind instrument for selectively inserting and removing one or more acoustic pipe segments from the sound path is disclosed. The valve includes a tapered housing enclosing a tapered lightweight rotor having at least one acoustic passage therethrough. The rotor is comprised of first and second axially coupled portions separated by a biasing spring tending to axially urge the portions apart. Each rotor acoustic passage is coupled inside the rotor to the rotor portions so as to permit the rotor portions to be axially separated from each other a predetermined distance while preserving the airtight seal between the rotor acoustic passage and each rotor portion. Hence, the rotor is axially self-adjusting in the valve housing, maintaining seal integrity of rotor apertures to housing apertures without periodic maintenance or adjustment.
    Type: Grant
    Filed: November 8, 1988
    Date of Patent: March 6, 1990
    Inventor: Orla E. Thayer
  • Patent number: 4718318
    Abstract: This invention relates to a flow path selector valve for use in wind instruments made of metal, such as a trumpet or a French horn. The valve comprises at least one pair of valve members, which consist each of a solid of revolution and are rotatably mounted on opposite sides of and in sliding and sealing contact with a centrally disposed, hollow bearing and drive block and integrally connected by a shaft. Each of said valve members consists of a cylinder, preferably of a cone, and contains a curved pipe section, which defines a flow path from an axial opening formed in the axially outer end portion of the valve member to a lateral opening formed in the shell of the valve member. The curved pipe sections are arranged in mirror symmetry in the valve members of said pair. Two air ducts are provided on opposite sides of the pair of valve members and devine flow paths differing in length. Each of said air ducts has two openings at opposite ends.
    Type: Grant
    Filed: September 16, 1986
    Date of Patent: January 12, 1988
    Inventor: Joseph P. Boy
  • Patent number: 4685372
    Abstract: In construction of a single valve unit for a brass musical instrument having blow-in and blow-out tubes, and multiple resonant tubes, rotation and axial displacement of a piston in a cylinder switches communication between the blow-in and blow-out tubes and the resonant tubes. Compared with prior art double valve units, the present signal valve unit simplifies valve construction, avoids the need for phase adjustment, between two valves and reduces fatigue on the operator.
    Type: Grant
    Filed: April 23, 1986
    Date of Patent: August 11, 1987
    Assignee: Nippon Gakki Seizo Kabushiki Kaisha
    Inventor: Kenzo Kawasaki
  • Patent number: 4469002
    Abstract: A rotary valve for selectively inserting and removing a slide loop from the sound path of a musical instrument is disclosed. The valve includes a rotor having an outer surface portion that is substantially conical and also includes a casing with a substantially conical inner surface portion that receives the outer surface portion of the rotor. Two sound passages entending through the rotor are no more than slightly curved. These passages align axially with the instrument's lead pipe, main bore, and slide loop ends so that a minimum of undesired harmonics are added to the tone of the instrument due to presence of the valve in the sound path.
    Type: Grant
    Filed: May 21, 1982
    Date of Patent: September 4, 1984
    Inventor: Orla E. Thayer
  • Patent number: 4336738
    Abstract: A brass instrument having multiple tuning slide valve blocks is provided with a unique pair of directional air control valves for selecting one tuning slide valve block. The directional air control valves have rotating valve blocks that are disposed on a common axle to be rotated together. A novel lever mechanism biases the axle in a normal position in which the primary tuning slide valve blocks are connected between the mouthpiece and the sound funnel. The lever mechanism permits the rotation of the axle to cause the direction control valves to connect either of the secondary tuning slide valve blocks between the mouthpiece and sound funnel.
    Type: Grant
    Filed: June 10, 1980
    Date of Patent: June 29, 1982
    Assignee: Fa. Gebr. Alexander Rheinische Musikinstrumentenfabrik GmbH
    Inventor: Anton Alexander
  • Patent number: 4299156
    Abstract: A rotary valve for selectively inserting and removing a slide loop from the sound path of a musical instrument is disclosed. The valve includes a rotor having two sound passages entending therethrough, which are no more than slightly curved. These passages align axially with the instrument's lead pipe, main bore, and slide loop ends so that a minimum of undesired harmonics are added to the tone of the instrument due to presence of the valve in the sound path.
    Type: Grant
    Filed: September 11, 1979
    Date of Patent: November 10, 1981
    Inventor: Orla E. Thayer
  • Patent number: 4213371
    Abstract: A rotary valve for selectively inserting and removing a slide loop from the sound path of a musical instrument is disclosed. The valve includes a rotor having two sound passages extending therethrough, one of the passages being straight and the other being only slightly curved. These passages align axially with the instrument's lead pipe, main bore, and slide loop ends so that a minimum of undesired harmonics are added to the tone of the instrument due to presence of the valve in the sound path.
    Type: Grant
    Filed: July 24, 1978
    Date of Patent: July 22, 1980
    Inventor: Orla E. Thayer
  • Patent number: 4112806
    Abstract: A rotary valve for selectively inserting and removing a slide loop from the sound path of a musical instrument is disclosed. The valve includes a rotor having two sound passages extending therethrough, one of the passages being straight and the other being only slightly curved. These passages align axially with the instrument's lead pipe, main bore, and slide loop ends so that a minimum of undesired harmonics are added to the tone of the instrument due to presence of the valve in the sound path.
    Type: Grant
    Filed: January 31, 1977
    Date of Patent: September 12, 1978
    Inventor: Orla E. Thayer
  • Patent number: 4095504
    Abstract: A rotary valve for a wind brass instrument comprises, as usual, a housing having a cylindrical wall with four duct connecting pieces fixed thereto about the circumference thereof. It also comprises a rotating member including a continuous metal shaft with end portions forming journals, a middle portion having a core element made of plastic material which does not swell in a wet environment, a metal jacket snugly fitted upon the core element and forming a fluid-tight joint with the cylindrical wall of the housing, and one or more pins engaged in respective bores extending diametrically through the jacket, core and shaft.
    Type: Grant
    Filed: March 28, 1977
    Date of Patent: June 20, 1978
    Inventor: Peter Hirsbrunner
  • Patent number: 4047459
    Abstract: A valve tuning system for a brass musical instrument having a single valve housing, a single valve body, which may be in several parts, a basic pipe and a plurality of by-pass pipes connected to the housing. A plurality of air-pipes or passages are formed in the valve body and a plurality of tuning keys are operable to move the valve body to a plurality of switch-over positions such that various combinations, or all, of the air-pipes and by-pass pipes may be connected in series with the basic instrument pipe to yield a temperament ratio without significant aberrations.
    Type: Grant
    Filed: August 8, 1975
    Date of Patent: September 13, 1977
    Inventor: Satoshi Nakamura