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    • 21. 发明申请
    • A HYDRAULIC BRAKING DEVICE HAVING SECURITY PROVISIONS, FOR A FARM TRACTOR OR A SIMILAR VEHICLE
    • WO2009090078A3
    • 2009-07-23
    • PCT/EP2009/000243
    • 2009-01-12
    • VHIT S.P.A. UNIPERSONALECADEDDU, Leonardo
    • CADEDDU, Leonardo
    • B60T11/21B60T13/14
    • A braking system for farm tractors and similar vehicles, comprising a differential braking system and a hydraulic system for the braking assistance forming a system unit (H) which includes two circuit branches (H1,H2), each circuit branch operating the braking with respect of one side of the vehicle. According to the invention, to said system unit (H) are applied, through connection interfaces (36,37), two control units (C1,C2), each control unit including an electrovalve (20) and a distributor (24) operated by said electrovalve, each said distributor (24) controlling the operation of the system unit (H) with respect to one of the circuit branches (H1,H2), and each said electrovalve (20) being singularly controlled by an electronic control circuit (EL) provided with sensors (V,R,P,A) of the main vehicle parameters, such as a sensor (V) of the vehicle speed, sensors (R) of the speed of singular wheels, sensors (P) of the positions of the braking pedals and a sensor (A) of the position of the accelerator pedal. In this manner the vehicle is equipped with a function of regulation of the slip in traction (ASR), or with a function preventing the wheel blockage in braking (ABS), or with a function of stability control (ESP), or with several of these and other functions, having a great utility to the aim of security when the vehicle runs on road at a high speed.
    • 22. 发明申请
    • A VALVE FOR DISCONNECTING THE FRONT BRAKING AND/OR THE TRAILER BRAKING, FOR A FARM TRACTOR OR A SIMILAR VEHICLE
    • 用于断开前制动器和/或拖拉机制动器,用于农用拖拉机或类似车辆的阀门
    • WO2007131758A1
    • 2007-11-22
    • PCT/EP2007/004267
    • 2007-05-10
    • VHIT S.P.A.CADEDDU, LeonardoALBERTI, Luigi
    • CADEDDU, LeonardoALBERTI, Luigi
    • B60T11/21
    • B60T11/21B60T13/245B60T17/221
    • A valve (VD) intended to disconnect, in specific circumstances, the braking of the front wheels (RAS1RAD), and/or of a trailer (RI) whose braking system is connected through a trailer braking valve (VFR), for the braking system of a farm tractor or similar vehicle which comprises two master cylinders (CMS1CMD), operated by two separate braking pedals (PS1PD), directly controlling the braking of the rear wheels (RPS1RPD), and controlling the braking of the front wheels (RAS1RAD) and/or the braking device of the trailer (RI) through the disconnection valve (VD). The disconnection valve (VD) includes a body (21 ), a first (25) and a second (24) inlet connections connected to the two master cylinders, and a delivery connection (29) connected to a braking circuit of the front wheels and/or to the trailer brake valve. The valve body (21 ) has a bore (38) wherein is installed one movable piston (23) subjected to the action of the pressure applied to the first inlet connection (25), the body (21 ) comprises a normally closed interception valve (26) closing a communication between the second inlet connection (24) and the delivery connection (29), and the movable piston (23) has a member (28) which opens the interception valve (26.) when the movable piston is displaced by the pressure applied to the first inlet connection (25), then allowing communication between the second inlet connection (24) and the delivery connection (29).
    • 在特定情况下,意图在制动系统中通过拖车制动阀(VFR)将前轮(RAS1RAD)和/或制动系统连接的拖车(RI)断开的阀(VD) 的农用拖拉机或类似车辆,其包括由两个单独的制动踏板(PS1PD)操作的两个主缸(CMS1CMD),直接控制后轮(RPS1RPD)的制动,并控制前轮(RAS1RAD)和 /或通过断路阀(VD)的拖车(RI)的制动装置。 断开阀(VD)包括主体(21),连接到两个主缸的第一(25)和第二(24)入口连接器,以及连接到前轮的制动回路的输送连接件(29)和 /或拖车制动阀。 阀体(21)具有孔(38),其中安装有受到施加到第一入口连接(25)的压力作用的一个可移动活塞(23),主体(21)包括常闭截止阀 26)关闭第二入口连接件(24)和输送连接件(29)之间的连通,并且可移动活塞(23)具有一个构件(28),当可移动活塞被移动时 施加到第一入口连接件(25)的压力,然后允许第二入口连接件(24)和输送连接件(29)之间的连通。
    • 25. 发明申请
    • A ROTARY PUMP WITH VANES
    • 带轮的旋转泵
    • WO2008034551A1
    • 2008-03-27
    • PCT/EP2007/007970
    • 2007-09-11
    • VHT S.P.A.CADEDDU, Leonardo
    • CADEDDU, Leonardo
    • F04C18/344F04C28/04
    • F04C28/04F04C18/3441F04C29/128F04C2240/20
    • The invention concerns a rotary pump comprising a stator (1 ) wherein is present a chamber (V) delimited by a circumferential wall (110), a cylindrical rotor (2) tangent to the circumferential wall (110) of the chamber (V) and suit¬ able for being driven in rotation around an axis (X) eccentric with respect to the chamber, and at least a vane (3) diametrically traversing the rotor by de¬ limiting in the rotor two half shells (4,4a), mutually separated by the walls (5,5a) guiding the vane (3). According to the invention, the two half shells (4,4a) are hollow, and inside these hollow half shells are housed elastic leaf springs (6,6a) forming one-way valves with respect to four passageways (7,8,9, 10) formed in the half shells; the discharge of the air-oil mixture takes place, after a centrifugation and a partial recycling, through passageways (12, 13), also in the case of a counter rotation of the pump. This configuration allows a bidirectional use of the same rotor.
    • 本发明涉及一种旋转泵,其包括定子(1),其中存在由圆周壁(110)限定的腔室(V),与腔室(V)的圆周壁(110)相切的圆柱形转子(2) 适于围绕相对于腔室偏心的轴线(X)旋转驱动,以及至少一个叶片(3),通过在转子中相互限制地横向移动,两个半壳体(4,4a)相互限制 由引导叶片(3)的壁(5,5a)分开。 根据本发明,两个半壳(4,4a)是中空的,并且在这些中空的半壳内部容纳有相对于四个通道(7,8,9,9)形成单向阀的弹性板簧(6,6a) 10)形成在半壳; 在泵的反向旋转的情况下,空气 - 油混合物的排放也在通过通道(12,13)进行离心和部分再循环之后进行。 该配置允许双向使用相同的转子。
    • 26. 发明申请
    • STROKE-CONTROLLED BALANCING VALVE FOR A HYDRAULIC BRAKING SYSTEM, BRAKING SYSTEM COMPRISING THE DEVICE AND METHOD OF OPERATING THE BRAKING SYSTEM
    • 用于液压制动系统的控制平衡阀,包括装置的制动系统和操作制动系统的方法
    • WO2017013595A1
    • 2017-01-26
    • PCT/IB2016/054314
    • 2016-07-20
    • VHIT S.P.A.
    • CADEDDU, Leonardo
    • B60T11/21
    • B60T11/21
    • A stroke-controlled balancing device for hydraulic braking systems, comprising a balancing duct, a normally closed balancing valve (145), configured, in use, to maintain a connection between the hydraulic braking system and the balancing duct (132) either closed or open, a stem (107, 108) having an external surface and an internal surface. A balancing channel (106) is provided on the internal surface of the stem, said channel being hydraulically connected to the balancing duct, and the balancing valve (145) is configured to slide, in use, along the external surface of the stem (107, 108) in order to open the connection between the braking system and the balancing duct. The invention further relates to a braking system comprising the balancing device, as well as a method of operation of the braking system.
    • 一种用于液压制动系统的行程控制平衡装置,包括平衡管道,常闭平衡阀(145),其构造成在使用中保持液压制动系统和平衡管道(132)之间的连接,关闭或打开 ,具有外表面和内表面的杆(107,108)。 在所述杆的内表面上设置平衡通道(106),所述通道液压地连接到所述平衡管道,所述平衡阀(145)构造成在使用中沿所述杆(107)的外表面滑动 ,108),以便打开制动系统和平衡管道之间的连接。 本发明还涉及包括平衡装置的制动系统以及制动系统的操作方法。
    • 28. 发明申请
    • VOLUMETRIC PUMP AND OPERATING METHOD THEREOF
    • 体积泵及其操作方法
    • WO2015101902A1
    • 2015-07-09
    • PCT/IB2014/067259
    • 2014-12-23
    • VHIT S.P.A.
    • CADEDDU, LeonardoFAUDA, Alessandro
    • F04C29/00F04C2/344
    • F04C29/005F04C2/3441F04C29/0057F04C29/0071
    • A positive displacement pump (13) comprises a pump body (15) defining a pump chamber (16) and a drive side (18), a rotor (12) configured to transfer fluid from at least one first environment to at least one second environment through at least one inlet for a suction duct (19) and at least one outlet for a discharge duct, a driven gear wheel (10a, 11) fixedly connected to said rotor (12) and a driving gear wheel (10a, 11) connectable to a drive member (10) and coupled with said driven wheel (10a, 11), said driven wheel being configured to rotate said rotor (12). The driving wheel (10a, 11) and the driven wheel (10a, 11) are placed one inside the other so as to allow achieving a reducing or a multiplying gear ratio. The invention also concerns a method of operating the pump.
    • 容积式泵(13)包括限定泵室(16)和驱动侧(18)的泵体(15),构造成将流体从至少一个第一环境传递到至少一个第二环境的转子(12) 通过用于吸入管道(19)的至少一个入口和用于排放管道的至少一个出口,固定地连接到所述转子(12)的从动齿轮(10a,11)和可连接的驱动齿轮(10a,11) 驱动构件(10)并且与所述从动轮(10a,11)联接,所述从动轮构造成使所述转子(12)旋转。 驱动轮(10a,11)和从动轮(10a,11)一个放置在另一个内部,以便实现减速或倍速传动比。 本发明还涉及一种操作泵的方法。