[특허]Variable pitch fan

[미국특허] Variable pitch fan 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B63H-003/00
출원번호	US-0116518 (1998-07-16)
우선권정보	CA-0116518 (1998-07-15)
발명자 / 주소	McCallum Jonathan E.,CAX Bruchal Brian J.,CAX Gerwing Murray C.,CAX
출원인 / 주소	Flexxaire Manufacturing Inc., CAX
대리인 / 주소	Christensen O'Connor Johnson and Kindness PLLC
인용정보	피인용 횟수 : 15 인용 특허 : 24

초록 ▼

A variable pitch fan in which the pitch of the fan blades is varied under control of a controller according to the speed of the fan. The controller is programmed to respond to increased fan speed by decreasing pitch of the fan blades. The variable pitch fan has a piston extending axially from a main shaft, about which main shaft a fan blade hub rotates. A pitch shifter is mounted on a cylinder, which itself is mounted on the piston. The pitch shifter is actuated by hydraulic fluid supplied through the main shaft to the cylinder. The piston is preferably axially stationary in relation to the main shaft. The cylinder is secured against rotational movement by at least one guide pin passing into the main shaft. Grease for the pitch shifter is supplied through the guide pin. One guide pin may be used for grease supply, while another may be used for excess grease return. Cooling of a pitch shifter may be accomplished using a heat sink mounted within the fan hub, preferably in a fan configuration, to conduct heat away from the cylinder into air rotating within the fan hub. Counterweights are mounted on each fan blade of a variable pitch fan, preferably hydraulically actuated, in a position which generates a torque opposite in direction to torque generated by the fan blades. The counterweights may be overbalanced, underbalanced, or balanced.

대표청구항 ▼

[ The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:] [1.] A variable pitch fan, comprising:a hub mounted for rotation on a main shaft, the main shaft having an axis;a piston extending axially from the main shaft;a cylinder mounted on the piston for axial movement between the piston and cylinder;a plurality of fan blades mounted around the hub;a pitch actuator and pitch shifting mechanism operably connected to the fan blades;the pitch shifting, mechanism being mounted on one of the cylinder and the piston, the pitch shifting mechanism interconnecting the one of the cylinder and the piston and the fan blades to convert axial movement of the one of the cylinder and piston to a pitch change of the fan blades;a fan speed sensor having a first communication link;a controller connected to the fan speed sensor by the first communication link and operably connected to the pitch actuator by a second communication link; andthe controller being responsive to signals from the fan speed sensor to control the pitch actuator and pitch shifting mechanism, the controller being programmed to respond to increased fan speed by decreasing pitch of the fan blades. [17.] A variable pitch fan, comprising:a hub mounted for rotation on a main shaft;a plurality of fan blades mounted around the hub;a pitch actuator and pitch shifting mechanism operably connected to the fan blades;a fan speed sensor having a first communication link;a heat sink mounted within the fan hub to conduct heat away from the pitch shifter into air rotating within the hub;a controller connected to the fan speed sensor by the first communication link and operably connected to the pitch actuator by a second communication link; andthe controller being responsive to signals from the fan speed sensor to control the pitch actuator and pitch shifting mechanism. The variable pitch fan of claim 17 in which the heat sink comprises a fan mounted on the pitch shifter.

이 특허에 인용된 특허 (24) 인용/피인용 타임라인 분석

Finnigan Henry W. (Lisburn GB5), Apparatus for the control of an aerial propeller.
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Okita Reiji (Higashihiroshima JPX) Kurio Noriyuki (Hiroshima JPX), Control apparatus for a rotary body for cooling an engine.
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Tanaka Shigetaka,JPX, Control system for non-linear control of a speed setting and a throttle valve in an aircraft engine.
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Mller Peter (Isengrund 9 CH-8134 Adliswil CHX), Control system for variable-pitch boat propeller.
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Moriya Yoshihito (Nagoya JPX), Electric pitch control apparatus for variable pitch propeller capable of controlling the pitch angle based instantaneous.
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Moriya Yoshihito (Nagoya JPX), Electric pitch control apparatus for variable-pitch propeller.
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Na Chan-Ju (Kyung Nam KRX), Engine cooling system with blade angle controllable cooling fan.
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Bianchi Emilio (Varese ITX), Fan comprising a blade pitch control mechanism.
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Hart Kenneth J. (Pinner GB2) Smith Colin P. (Stalbans GB2), Oil cooler.
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Duchesneau Jerome G. (Pine Ridge Dr. Andover CT 06232), Pitch change actuation system.
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Moriya Yoshihito (Takahama JPX), Pitch control apparatus for variable pitch propeller.
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Carvalho Paul A. (Westfield MA) Games John E. (Granby CT) Bonnanzio Richard L. (Milford CT), Propeller pitch change machanism with inductive brake and motor.
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Carvalho Paul A. (Westfield MA), Propeller pitch change mechanism.
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Morgenthaler Urs (Seeblick CH-8832 Wollerau CHX) Mller Peter (Isengrund 9 CH-8134 Adliswil CHX), Ship drive with variable-pitch propeller.
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Carvalho Paul A. ; Pruden Robert W., Variable pitch counterweighted propeller system with releasable hydraulic pitchlock.
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Isert Clarence (Dewberry CAX), Variable pitch fan.
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Isert Clarence A. (Dewberry CAX), Variable pitch fan.
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Avena Salvatore (Newark NJ) Minarick Joseph W. (Oakland NJ), Variable pitch mechanism for fan blades.
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Water Abraham (16 Cliff Road Torbay ; Auckland NZX), Variable pitch mechanisms.
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Bishop Edward T. (Northants GBX), Variable speed coupling system for cooling an engine.
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Seeley Roger W. (Cheltenham GB2), Variable-pitch bladed rotors.
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Langenberg Klaas H. (Forsbro Pl. 3283 82010 Arbra SEX), Variable-pitch propeller or fan.
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Yu Mason K. (Birmingham MI), Vehicle engine cooling apparatus.
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Carre Jean (Mailly-la-Ville FRX), Wind motors and aerogenerators.
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이 특허를 인용한 특허 (15) 인용/피인용 타임라인 분석

Bettencourt, Jr.,Harold Ray; Bettencourt,Nick; Bettencourt, III,Harold Ray, Control for cooling fan.
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McCallum,Jonathan E; Norell,Andrew L, Control system for variable pitch fan.
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Bettencourt, Harold Ray, Controller for variable pitch fan system.
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Robinson, James S., Fan blade pitch change assembly.
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Tembreull,Thomas; Sprygada,Benjamin, Fan penetration feature for in-vehicle testing.
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Borges,Guy F., Flow reversal system for axial fan.
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Vogt, Bryan A., Method and apparatus for cooling fan control algorithm.
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Melius,Jeffrey Alan; Harbourt,Cyrus David; Aiken,Brian Matthew; Moore,Christopher Todd; Edmunds,Howard Ross; Lindholm,Brian Eric; McMenamin,Christopher; Bonneau,William John; Ridenour,Amy Marlene; Wi, Method and apparatus for gravity induced thermal energy dissipation.
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Hughes, Arthur C., Method and apparatus for self-contained variable pitch and/or constant speed propeller including provisions for feathering and reverse pitch operation.
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Carr, Fred K., Microprocessor system for controlling rotor pitch.
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Byun, Hyung-Suk, Radiator having air guide for preventing heat damage in a vehicle.
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Jonathan E. McCallum CA; Brian J. Bruchal CA; Murray C. Gerwing CA, Variable pitch fan.
상세보기
McCallum, Jonathan E.; Bruchal, Brian J.; Gerwing, Murray C., Variable pitch fan.
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McCallum, Jonathan E.; Nelson, Terry D.; Gerwing, Murray C., Variable pitch fan.
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McCallum, Jonathan E.; Norell, Andrew L.; Antoszko, George; Kloza, Mariusz, Variable pitch fan having a pitch sensor.
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[미국특허] Variable pitch fan 원문보기