[특허]Braking valve for hydraulic circuits

Bennes Marrel (FRX 03)

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특허 상세정보

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Braking valve for hydraulic circuits

특허상세정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F15B-013/04
미국특허분류(USC)	91/420 ; 91/445 ; 91/454 ; 251/634
출원번호	US-0554374 (1983-11-23)
발명자 / 주소	Tardy Maurice (Saint Etienne FRX)
출원인 / 주소	Bennes Marrel (FRX 03)
인용정보	피인용 횟수 : 3 인용 특허 : 5

초록
▼

The body of the braking valve includes a front chamber, an intermediate chamber and a rear chamber which surround a blocking component and a governing piston. The diameter of the bore, in which slides the governing piston at the rear of the chamber, is equal to the diameter of the line along which the truncated conical bearing surface of the blocking component comes into contact with a seat situated between the front and intermediate chambers. The pressure in the intermediate chamber is connected to an outlet of a distributor which has no effect on the b...

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청구항
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A braking valve for installation between a pressure distributor means and a pressure responsive jack means, said pressure distributor means supplying pressurized fluid through a first outlet and a second outlet, said pressure responsive jack means having a first inlet interconnected with said first outlet of said pressure distributor means and further having a second inlet, said braking valve further comprising: a valve body; a first sealed chamber in said valve body; a third outlet in said valve body from said first sealed chamber for interconnection with said second inlet of said pressure responsive jack means; a second sealed chamber in said valve body; a third inlet in said valve body to said second sealed chamber for interconnection with said second outlet of said pressure distributor means such that said second sealed chamber may be selectively pressurized; first passage means in said valve body interconnecting said first sealed chamber and said second sealed chamber; first valve seat means formed in said valve body adjacent said first passage means; a first valve member movably interconnected with said valve body and selectively engageable with said first valve seat means to selectively open and close said first passage means for fluid flow between said first sealed chamber and said second sealed chamber; first biasing means interposed said first valve member and said valve body and biasing said first valve member into engagement with said first valve seat means to close said first passage means, said first valve member being responsive to the pressure level in said second sealed chamber such that said pressure level in said second sealed chamber exerts a force on said first valve member biasing said first valve member away from said first valve seat means against the force of said first biasing means whereby said first passage means is selectively opened when said pressure level in said second sealed chamber exceeds a predetermined amount; a third sealed chamber in said valve body, said second sealed chamber having at least one portion disposed between at least one portion of said first sealed chamber and at least one portion of said third sealed chamber; a fourth inlet in said valve body to said third sealed chamber for interconnection with said first outlet of said pressure distributor means; a first elongated passageway interconnecting said at least one portion of said first sealed chamber and said at least one portion of said second sealed chamber, said first elongated passageway having a longitudinal axis; a second elongated passageway interconnecting said at least one portion of said second sealed chamber and said at least one portion of said third sealed chamber, said second elongated passageway being axially aligned with said first elongated passageway, said second elongated passageway having a minimal cross-sectional diameter measurement indentical to the minimal cross-sectional diameter measurement of said first elongated passageway; a second valve seat means formed in said valve body adjacent said first elongated passageway; piston means movably disposed in said third sealed chamber, said piston means having a first surface exposed to the pressure in said third sealed chamber, said first surface facing in the direction towards said second sealed chamber such that said pressure in said third sealed chamber exerts a first force on said piston means in a first predetermined direction along said longitudinal axis, said first predetermined direction being the direction from said second sealed chamber towards said third sealed chamber, said piston means further having a reduced diameter portion at least partially slidingly and sealingly disposed in said second elongated passageway; a second valve member at least partially disposed in said second sealed chamber, said second valve member being movably interconnected with said valve body such as to be selectively displaceable along said longitudinal axis towards and away from said second valve seat means, said second valve member having a first end selectively engageable with said reduced diameter portion of said piston means, a second end opposite said first end, and a valving portion remote from said first end selectively engageable with said second valve seat means to open and close said first elongated passageway such as to selectively permit fluid flow therealong between said first sealed chamber and said second sealed chamber, said second valve member experiencing a second force on said second end from the pressure level in said first sealed chamber, said second force being in said first predetermined direction such that said second force biases said first end of said second valve member against said reduced diameter portion of said piston means; and second biasing means interposed said valve body and said piston means, said second biasing means biasing said piston means in a second predetermined direction along said lonitudinal axis opposite said first predetermined direction such as to exert a third force on said piston means, such that, said second valve member is selectively displaced along said longitudinal axis to open and close said first elongated passageway in response to a net force equal to the sum of said first, second and third forces, the movement of said second valve member being independent of the pressure level in said second sealed chamber.

이 특허에 인용된 특허 (5)

이 특허를 인용한 특허 피인용횟수: 3

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특허 상세정보

Braking valve for hydraulic circuits

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이 특허에 인용된 특허 (5)

이 특허를 인용한 특허 피인용횟수: 3

IPC 상위 출원인

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특허 상세정보

Braking valve for hydraulic circuits

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대표청구항 ▼

이 특허에 인용된 특허 (5)

이 특허를 인용한 특허 피인용횟수: 3

IPC 상위 출원인

과제정보

상세정보조회

원문조회

IPC 상세정보(version : 201201)

연구과제 성과물(0)

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