Portable hand-held blower/vacuum unit with resilient engine mounting system
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F04B-035/00
출원번호
US-0719027
(1991-06-21)
발명자
/ 주소
Sadler Jeffrey G. (Shreveport LA) Tuggle Lloyd H. (Shreveport LA) Collins Imack L. (Shreveport LA)
출원인 / 주소
White Consolidated Industries, Inc. (Cleveland OH 02)
인용정보
피인용 횟수 :
14인용 특허 :
9
초록▼
A portable, hand-held blower/vacuum unit has a housing structure defined by an upper engine shroud removably connected to the top wall of a lower impeller housing. Disposed within the shroud is a small internal combustion engine having a vertical crankshaft which extends downwardly through a dependi
A portable, hand-held blower/vacuum unit has a housing structure defined by an upper engine shroud removably connected to the top wall of a lower impeller housing. Disposed within the shroud is a small internal combustion engine having a vertical crankshaft which extends downwardly through a depending well section formed on the top wall of the impeller housing, the lower shaft end being drivingly connected to a centrifugal fan impeller positioned within the impeller housing and operative to force a flow of ambient air therethrough. The engine is resiliently and floatingly mounted within the shroud by a resilient support system which prevents rigid contact between the engine and the shroud or the impeller housing to thereby substantially reduce engine vibration transmitted to the housing structure, and permit deflection of the engine relative to the housing structure to lessen the possibility of engine damage caused by impeller impact from ingested objects. The engine\s carburetor is disposed within a shroud wall section that defines with a fan housing portion of the engine a double-walled thermal barrier disposed between the carburetor and the engine\s muffler. A resilient air filter element is interconnected between the shroud and the carburetor air inlet and flexes in response to engine deflection to thereby absorb and damp engine vibration which might otherwise be transmitted to the housing structure through the carburetor.
대표청구항▼
A portable, hand-carried internal combustion engine powered air moving device convertible between blower and vacuum modes of operation, said device comprising: a generally hollow body having: a top end with an operator carrying handle secured thereto, a bottom end, a front side, an upper body portio
A portable, hand-carried internal combustion engine powered air moving device convertible between blower and vacuum modes of operation, said device comprising: a generally hollow body having: a top end with an operator carrying handle secured thereto, a bottom end, a front side, an upper body portion having an air inlet opening, and an outlet opening extending through said front side, a lower end chamber downwardly bounded by said bottom end, air inlet means for defining an air inlet opening extending through said bottom end into said lower end chamber, and air discharge means for defining an air discharge opening extending outwardly from said lower end chamber through said front side, an internal combustion engine disposed within said upper body portion and including: a crankshaft carried within said upper body portion for driven rotation about a drive axis which, with said device in a normal operating position, is generally vertically oriented, a cylinder disposed forwardly of an upper end portion of said crankshaft within said upper body portion and having a piston mounted in said cylinder for generally horizontal reciprocation when said device is in a normal operating position, said piston being connected to said upper end portion of said crankshaft to rotationally drive said crankshaft during piston reciprocation, a muffler carried within said upper body portion above said cylinder and forwardly of said crankshaft, said muffler being adapted to receive exhaust gas from said cylinder and discharge the received exhaust gas through said front side outlet opening of said upper body portion, a carburetor carried within said upper body portion above said upper end portion of said crankshaft and spaced rearwardly from said muffler, a fan housing having an inlet opening, and an upper fan housing portion enveloping said muffler and said cylinder and having an outlet opening facing said front side outlet opening of said upper body portion, and means for sequentially flowing cooling air inwardly through said air inlet opening of said upper body portion, into said fan housing inlet opening, through said fan housing across said cylinder and said muffler, and then outwardly through said fan housing outlet opening and said upper body portion outlet opening; a centrifugal fan impeller positioned within said lower end chamber and rotationally drivable by said crankshaft about said drive axis to sequentially draw air into said lower end chamber through said bottom end air inlet and discharge the air from said lower end chamber outwardly through its air discharge opening; and means for thermally isolating said muffler from said carburetor, said means for thermally isolating including: a generally vertical rear wall portion of said fan housing positioned between said muffler and said carburetor in a horizontally spaced relationship therewith, and a generally vertical interior wall portion said body positioned between said carburetor and said rear wall portion of said fan housing in a horizontally spaced relationship therewith.
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이 특허에 인용된 특허 (9)
Erickson ; Jr. Roy O. (Cadillac MI), Air blower assembly for vacuum cleaners.
Luerken Adolf (Rancho Palos Verdes CA) Cannistra John S. (Chatsworth CA) Zimmerer John L. (Torrance CA) Pilatowicz Edward J. (Los Angeles CA), Lawn/garden blower/vacuum.
Miner Jonathan L. (Timonium MD) Lacher Vernon R. (Fallston MD) Rescigno Gerald J. (Baltimore MD) Swim William B. (Cookeville TN) Gierke Martin P. (Baltimore MD) Hahn David A. (Baltimore MD), Portable blower.
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