[특허]Hydraulic vibration damper with noise reduction damping valves

[미국특허] Hydraulic vibration damper with noise reduction damping valves 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F16F-009/348 F16F-009/34
출원번호	US-0256395 (1981-04-22)
우선권정보	DE-3015596 (1980-04-23)
발명자 / 주소	Grundei Manfred (Niederwerrn DEX)
출원인 / 주소	Fichtel & Sachs AG (Schweinfurt DEX 03)
인용정보	피인용 횟수 : 25 인용 특허 : 5

초록 ▼

A hydraulic vibration damper featuring reduced noise characteristics wherein a first and a second damping valve system operate in response to fluid pressure to control flow of damping fluid in each direction of movement, respectively, of a piston of the damper. The first and second damping valve systems include a preliminary throttling aperture, an aperture disc defining a preliminary aperture located downstream relative to the direction of fluid flow through the respective damping valve systems, and a noise reduction mechanism for producing a post-throttling effect downstream of the preliminary aperture, the noise reduction mechanism being formed by a baffle plate located to be impinged by fluid flowing through the preliminary aperture, the baffle plate being arranged to define a quieting duct immediately adjacent the baffle plate upstream thereof.

대표청구항 ▼

A hydraulic vibration damper unit comprising (A) a cylinder member (1) having an axis and two ends defining a cavity (8, 9) therein; said cavity containing a fluid; (B) a piston rod member (2) passing through one of said ends along said axis and being movable in an inward and an outward direction along said axis; (C) a piston unit fixed to said piston rod member (2) within said cavity (8, 9) and dividing said cavity (8, 9) into two working chambers (8, 9) consisting of a first working chamber (8) adjacent one of said ends of said cylinder member (1) and a second working chamber (9) adjacent the other of said ends of said cylinder member (1), said piston unit comprising (a) a piston member (3); (b) first passage means between said working chambers (8, 9); (c) second passage means (22, 15, 17, 18) between said working chambers (8, 9), said second passage means (22, 15, 17, 18) including at least one substantially axially directed bore (22) through said piston member (3), said bore (22) having a first end adjacent said one end of said cylinder member (1) and a second end remote from said one end of said cylinder member (1); (d) check valve means operatively associated with said second passage means (22, 15, 17, 18) and increasingly opening said second passage means in response to outward movement of said piston unit, said check valve means comprising (d1) an annular valve seat (16) on said piston member (3) radially outwardly of said second end of said bore (22); (d2) an annular disc member (14) substantially perpendicular to said axis substantially covering said second end of said bore (22), said annular disc member (14) being axially fixed with respect to said piston member (3) radially inwardly of said second end of said bore (22) and being yieldingly biased into contact with said annular valve seat (16), said annular disc member (14) being provided with at least one opening (15); (d3) an annular plate member (11) substantially perpendicular to said axis adjacent said annular disc member (14) on the side thereof remote from said annular valve seat (16), said annular plate member (11) being provided with an axial projection (13) engaging said annular disc member (14) along a circle substantially following said annular valve seat (16) and with an annular recess (17) radially inward of said annular projection (13), said annular recess (17) having a bottom face (12) spaced from said annular disc member (14) and being opposed to said opening (15), at least one substantially axially directed channel (18) being provided between said annular recess (17) and said second working chamber (9) at a location radially inward of said opening (15), said annular plate member (11) being axially movable and urged into a closing position by spring means (25) urging said projection (13) into contact with said annular disc member (14), said annular disc member (14) and said annular plate member (11) being movable away from said annular valve seat (16) by deflection of said annular disc member (14) and axial movement of said annular plate member (11) in response to increase of fluid pressure in said first working chamber (8) above the level of fluid pressure in said second working chamber (9) by a predetermined amount.

이 특허에 인용된 특허 (5) 인용/피인용 타임라인 분석

Wijnhoven ; Jan M. A. ; Oancea ; Alexandru ; Vanhove ; Henri C. J. ; Be ets ; Roland H. C., Base valve for independent wheel suspension strut.
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Nandyal ; Srinath ; McNally ; Sellers B., Compression head assembly.
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Tomita Takao (Saitama JPX) Anno Nobuo (Saitama JPX) Yamamoto Hitoshi (Saitama JPX), Shock absorber.
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Leppich Erhard (Wolfsburg DT), Telescoping shock absorber with plural valves.
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Nicholls ; Lawrence George, Valve assembly for a piston of a telescopic damper.
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이 특허를 인용한 특허 (25) 인용/피인용 타임라인 분석

Mintgen Rolf,DEX ; Rothe Wolfgang,DEX ; Rennecke Dirk,DEX ; Ritter Andreas,DEX ; Gehlen Marco,DEX, Blockable piston-cylinder unit.
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Förster, Andreas, Damping valve assembly with a progressive damping force characteristic.
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Moradmand Jamshid Kargar ; Neal Robert Alan ; Nunke William R., Digressive base valve for automotive damper.
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Moradmand Jamshid Kargar, Digressive damper valve.
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Murakami, Tomoharu, Double tube hydraulic shock absorber.
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Grundei Manfred (Niederwerrn DEX), Double-tube vibration damper.
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Moradmand Jamshid Kargar ; Khalkhali Hamed, Flexible monotube valve with digressive performance and independent low speed orifice.
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Deferme,Stefan, Fulcrum blow off valve for use in a shock absorber.
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Stefan Deferme BE, Fulcrum blow off valve for use in a shock absorber.
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Ergun Joseph (Itasca IL), Heavy duty vehicular shock absorber.
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Kato Tetsuo (Kanagawa JPX), Hydraulic shock absorber.
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Weber, Norbert, Hydropneumatic piston/cylinder arrangement.
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Moradmand Jamshid Kargar ; Neal Robert Alan, Internally slotted orifice disc for low speed control in automotive dampers.
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Bombrys, Timothy; Breese, Darrell; Groves, Gary; Kazmirski, Karl; Keil, Daniel; Roessle, Matthew; Schaller, Ben; Schelosky, Matthew; Szymusiak, Jim, Nested check high speed valve.
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Bombrys, Timothy; Breese, Darrell; Groves, Gary; Kazmirski, Karl; Keil, Daniel; Roessle, Matthew; Schaller, Ben; Schelosky, Matthew; Szymusiak, Jim, Nested check high speed valve.
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Bombrys, Timothy; Breese, Darrell; Groves, Gary; Kazmirski, Karl; Keil, Daniel; Roessle, Matthew; Schaller, Ben; Schelosky, Matthew; Szymusiak, Jim, Nested check high speed valve.
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Bombrys, Timothy; Breese, Darrell; Groves, Gary; Kazmirski, Karl; Keil, Daniel; Roessle, Matthew; Schaller, Ben; Schelosky, Matthew; Szymusiak, Jim, Nested check high speed valve.
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Bombrys, Timothy; Breese, Darrell; Groves, Gary; Kazmirski, Karl; Keil, Daniel; Roessle, Matthew; Schaller, Ben; Schelosky, Matthew; Szymusiak, Jim, Nested check high speed valve.
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De Kock, Paul, Nonreturn valve for a shock absorber.
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Axthammer Ludwig (Hambach DEX) Wssner Felix (Schweinfurt DEX), Piston rod with an integral piston for a shock absorber.
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Daniel Keil ; Karl Kazmirski, Ported disc variable bleed orifice.
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Daniel Keil, Shock absorber having ported plate low speed tunability.
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Poyser John (Haxby GB2), Shock absorbers.
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Cheatham Claude H. (West Carrollton OH) Pees James Mitchell (Centerville OH) Wells Joel Ray (Huber Heights OH), Suspension damper.
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Wolfgang Rothe,DEX ; Rennecke Dirk,DEX ; Mintgen Rolf,DEX, Valve.
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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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[미국특허] Hydraulic vibration damper with noise reduction damping valves 원문보기

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[미국특허] Hydraulic vibration damper with noise reduction damping valves 원문보기

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