公开(公告)号：US5142927A

公开(公告)日：1992-09-01

申请号：US613067

申请日：1990-11-15

Applicant: Giuseppe Amedei ,  Angelo Rondelli

Inventor： Giuseppe Amedei ,  Angelo Rondelli

IPC: F16H61/30

CPC classification number: F16H61/30 ,  F16H2061/301 ,  Y10T74/19251 ,  Y10T74/20024 ,  Y10T74/20159

Abstract: The device comprises a lever movable by the operator between at least two working positions and a neutral position to achieve, by means of an hydraulic actuator of double acting follower type, of the gear ratios in one stage of the gear box. The actuator comprises a piston slidable between two working positions and one neutral position to actuate engagement means and defining two chambers; and a shaft connected to the lever by means of a motion transfer unit and shaped as an hydraulic distributor in such a way that in the neutral position of the lever the chambers are connected to a discharge opening so as to determine the neutral position of the piston, and in a manner and in an operative position the stroke of the shaft causes communication of one chamber with the opening and of the other with an inlet opening for a fluid under pressure such that the pressure will translate the piston in the same direction and with the same stroke as the shaft. (FIG. 4).

Abstract translation: 该装置包括可由操作者在至少两个工作位置和中间位置之间移动的杠杆，以通过双作用从动器类型的液压致动器在齿轮箱的一级中实现齿轮比。 致动器包括可在两个工作位置和一个中间位置之间滑动以致动接合装置并限定两个室的活塞; 以及通过运动传递单元连接到杠杆的轴，并​​且形成为液压分配器，使得在杠杆的中间位置，这些室连接到排出口，以便确定活塞的中间位置 并且在一种方式和操作位置中，轴的行程使得一个腔室与开口和另一个腔室的连通具有用于压力下的流体的入口开口，使得压力将使活塞沿相同方向平移并且与 与轴相同的行程。 （图4）。

公开(公告)号：US4957016A

公开(公告)日：1990-09-18

申请号：US497832

申请日：1990-03-22

Applicant: Giuseppe Amedei ,  Angelo Rondelli

Inventor： Giuseppe Amedei ,  Angelo Rondelli

IPC: F16H3/00 ,  F16H37/04 ,  F16H61/02 ,  F16H63/30

CPC classification number: F16H61/688 ,  F16H3/006 ,  F16H37/043 ,  F16H61/0248 ,  F16H2200/0052 ,  F16H2306/00 ,  F16H63/3026 ,  Y10T74/19251 ,  Y10T74/1926 ,  Y10T74/19288

Abstract: A transmission for an agricultural tractor featuring a large number of gears and comprising a first six-gear stage and a second reverse-reduction stage having three forward and one reverse speed ranges. The first stage comprises a pair of drive shafts selectively connectable to an input shaft via respective hydraulic clutches and to an output shaft via constant mesh gears respectively defining the odd and even number gears and engaging the output shaft via sliding couplings controlled by three-position hydraulic actuators. The actuators are operated by respective pairs of on-off solenoid valves supplied via a proportional-response solenoid valve, further proportional-response solenoid valves controlling engagement and release of the aforementioned clutches. All the aforementioned solenoid valves are controlled by an electronic control unit for appropriately controlling engagement of the clutches and actuators as a function of the actual service conditions of the tractor.

公开(公告)号：US5020419A

公开(公告)日：1991-06-04

申请号：US359374

申请日：1989-05-31

Applicant: Giuseppe Amedei ,  Angelo Rondelli

Inventor： Giuseppe Amedei ,  Angelo Rondelli

IPC: F15B11/12 ,  F16D25/08 ,  F16D25/10 ,  F16D25/12 ,  F16H59/68 ,  F16H61/30

CPC classification number: F16D25/12 ,  F15B11/123 ,  F16D25/088 ,  F16D25/10 ,  F16H61/30 ,  F16H2059/6807 ,  F16H2061/307

Abstract: A three-position hydraulic actuator comprising an outer body defining a cylindrical inner cavity; a dual-rod piston sliding inside the cavity; a pair of stop rings mounted in respective central annular seats in the lateral wall of the cavity and on the piston; and a pair of bushes sliding in sealed manner between the piston and the lateral wall of the cavity and located on axially opposite sides in relation to the stop rings.

公开(公告)号：US4092047A

公开(公告)日：1978-05-30

申请号：US705490

申请日：1976-07-15

Applicant: Giuseppe Amedei ,  Carlo Alberto Quilico ,  Virginio Maggioni

Inventor： Giuseppe Amedei ,  Carlo Alberto Quilico ,  Virginio Maggioni

IPC: B60T8/18 ,  B60T8/22

CPC classification number: B60T8/1831

Abstract: A control device for a pneumatic braking system which is particularly suitable for industrial trucks and lorries the axle loading of which varies widely depending on whether the truck is empty or fully laden. The device has an inlet port which in use is fed with the braking control pressure, and an outlet port which feeds a servo-valve to determine the pressure fed to the brakes of, for example, the rear wheels. The control device comprises a generally cylindrical housing separated into two chambers by a piston, the two chambers communicate with each other through a controlled restrictor passage the size of the opening of which is controlled by the position of the piston. The exposed area of the piston in one chamber is greater than in the other, so that when the pressure in both chambers is the same, the piston experiences a resultant force towards the other chamber but movement is resisted by a force proportional to the axle loading derived by a mechanical or fluid pressure arrangement. If the braking control pressure in the two chambers reaches a value such that the resultant force on the piston is greater than the applied force the piston moves partly closing the restrictor thereby reducing the pressure in the one chamber until the forces on the piston are balanced. The outlet port from the device is fed from the one chamber so that the outlet braking pressure is reduced with respect to the inlet pressure in these circumstances.

Abstract translation: 一种用于气动制动系统的控制装置，其特别适合于工业卡车和货车，其轴载度根据卡车是空的还是完全负载而变化很大。 该装置具有在使用中被供给制动控制压力的入口端口和用于馈送伺服阀以确定馈送到例如后轮的制动器的压力的出口。 控制装置包括通过活塞分成两个室的大致圆柱形的壳体，两个室通过控制的限流器通道彼此连通，该开口的尺寸由活塞的位置控制。 活塞在一个室中的暴露面积大于另一个腔室中的暴露面积，使得当两个腔室中的压力相同时，活塞朝向另一个腔室产生合力，但运动由与轴负载成比例的力抵抗 通过机械或流体压力排列导出。 如果两个室中的制动控制压力达到使得活塞上的合力大于施加的力的值，则活塞部分地关闭限流器，从而降低一个室中的压力，直到活塞上的力平衡。 来自装置的出口从一个室供给，使得在这些情况下出口制动压力相对于入口压力减小。

公开(公告)号：US4873880A

公开(公告)日：1989-10-17

申请号：US176549

申请日：1988-04-01

Applicant: Giuseppe Amedei ,  Giovanni Tornactore

Inventor： Giuseppe Amedei ,  Giovanni Tornactore

IPC: F16H61/02 ,  F16H61/06 ,  F16H61/684 ,  F16H61/70 ,  F16H63/42

CPC classification number: F16H61/061 ,  F16H61/0248 ,  F16H2061/0258 ,  F16H2312/02 ,  F16H61/684 ,  F16H61/70 ,  F16H63/42 ,  Y10T74/1926

Abstract: A gearbox with a large number of ratios can be operated according to the laws of pressure variation with respect to the friction clutches provided for the engagement of the various ratios wherein the laws of pressure variation are no longer fixed but can be adapted to the various requirements for effective operation of the gearbox according to operative conditions of the vehicle in which the gearbox is installed. The valve units are exclusively electro-hydraulic proportional-responsive valve units. The operating conditions of the gearbox and the tractor in which it is installed are monitored by suitable devices which generate electrical signals indicative of the operating conditions. An electronic control unit is supplied with these signals and is arranged to pilot the electro-hydraulic proportional-responsive valves so as to regulate the manner of combined engagement and disengagement of the hydraulic clutches in dependence on the operative conditions.

公开(公告)号：US4130990A

公开(公告)日：1978-12-26

申请号：US816070

申请日：1977-07-15

Applicant: Giuseppe Amedei ,  Enrico Rivetti ,  Antonino Bertone

Inventor： Giuseppe Amedei ,  Enrico Rivetti ,  Antonino Bertone

IPC: F15B11/20 ,  B60K23/02 ,  B60T13/12 ,  B60T13/16 ,  B62D5/07 ,  F15B11/16 ,  F16D31/00

CPC classification number: F15B11/16 ,  B60T13/12 ,  B60T13/161 ,  B62D5/07 ,  F15B2211/20538 ,  F15B2211/324 ,  F15B2211/329 ,  F15B2211/50554 ,  F15B2211/528 ,  F15B2211/7052 ,  F15B2211/7055 ,  F15B2211/71 ,  F15B2211/78

Abstract: A hydraulic system for feeding a plurality of independent hydraulic servo-operated devices, such as servo-assisted brakes, clutch and/or servo-operated steering, in which a single pump draws fluid from a common reservoir and fluid pressure is automatically distributed by one or more modulating valves to the or each of the devices requiring power at any one time. The or each modulating valve comprises at least one piston in a cylinder, the piston being displaced by an increase in pressure due to displacement of one or more operating member such as brake or clutch pedal, or steering wheel, this controlling the flow of fluid through an axial passage in the piston by controlling its proximity to a valve shutter element and thereby controlling the fluid pressure in a chamber of the modulating valve, which pressure is fed to a control chamber of at least one distributor associated with a servo actuator of one of the servo operated devices of the system whereby to control the operating pressure applied to this.

Abstract translation: 用于馈送多个独立的液压伺服操作装置的液压系统，例如伺服辅助制动器，离合器和/或伺服操作的转向，其中单个泵从公共储存器抽取流体和流体压力由一个 或更多的调节阀到任何一个时间需要电力的装置或每个装置。 该或每个调节阀包括气缸中的至少一个活塞，活塞由于一个或多个操作构件（例如制动器或离合器踏板或方向盘）的位移而由于压力增加而移位，这控制流体流动 通过控制其与阀门闸门元件的接近并由此控制调节阀的腔室中的流体压力，该活塞中的轴向通道被输送到与至少一个分配器的控制室相关联的伺服致动器 系统的伺服操作装置，从而控制施加到其上的操作压力。

公开(公告)号：US4203631A

公开(公告)日：1980-05-20

申请号：US742

申请日：1979-01-03

Applicant: Enrico Rivetti ,  Giuseppe Amedei ,  Antonino Bertone

Inventor： Enrico Rivetti ,  Giuseppe Amedei ,  Antonino Bertone

IPC: B60T13/12 ,  B60T13/16

CPC classification number: B60T13/161

Abstract: A hydraulic servo-assisted braking system for motor vehicles has a master cylinder controlling two independent braking circuits through respective auxiliary cylinders each having an auxiliary piston with a central bore and an associated servo-piston with a stem which closes the said bore upon displacement of the servo-piston by hydraulic fluid pressure of source circuit, separable from the master cylinder, applied to the servo-piston through a common interception valve which is opened to admit the source pressure to the servo-pistons upon movement of either or both of a pair of pistons in a modulator cylinder subjected to the respective hydraulic pressures in the two brake actuator circuits. Failure of one of the braking circuits allows the other to remain operative, while damage to the servo-cylinders allows braking to remain effective through the master cylinder.

Abstract translation: 用于机动车辆的液压伺服辅助制动系统具有主缸，其通过各自的辅助缸控制两个独立的制动回路，每个辅助缸具有带有中心孔的辅助活塞和相关联的伺服活塞，该杆具有杆，当杆 伺服活塞通过源电路的液压流体压力，与主缸分离，通过一个共同的拦截阀施加到伺服活塞上，该拦截阀被打开以允许一对或两者的运动时的源压力到伺服活塞 的活塞在经过两个制动致动器电路中的相应液压的调制器气缸中。 其中一个制动电路的故障使另一个制动电路保持工作，而伺服液压缸的损坏允许制动通过主汽缸保持有效。