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公开(公告)号:ITMI951452A1
公开(公告)日:1997-01-06
申请号:ITMI951452
申请日:1995-07-06
Applicant: BOSCH GMBH ROBERT
Inventor: HOEFER FRIEDRICH-WILHELM
IPC: H02K20060101 , H02K1/18 , H02K1/24 , H02K5/15
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公开(公告)号:DE2705054A1
公开(公告)日:1978-08-10
申请号:DE2705054
申请日:1977-02-08
Applicant: BOSCH GMBH ROBERT
Inventor: HOEFER FRIEDRICH-WILHELM , GERSCHWITZ WALTER , SCHWERIN GUENTER
IPC: A01B63/111 , F15B11/02 , F15B13/02
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公开(公告)号:DE2641639A1
公开(公告)日:1978-03-30
申请号:DE2641639
申请日:1976-09-16
Applicant: BOSCH GMBH ROBERT
Inventor: BRAKEL KORNELIUS , HOEFER FRIEDRICH-WILHELM , KULLMANN ERWIN , SCHWERIN GUENTHER
Abstract: The valve support sleeve has an internal valve seat and seal on the outside circumference for holding a closing element. This valve is for pressure limiting for large flow rates. The valve seat is arranged into first tubular section connected to second tubular section which has a larger dia. The second section (20) is used for fastening the valve support sleeve (17) into a housing (10) by external screw threads. This second section has no radial flow openings and it has spanner slots (29). The length of the second section (20) is smaller than the dia. of the outside screw threads (27). Transition from the second (20) into the first (19) section is conical and the flow holes (24) are situated in this transition area.
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公开(公告)号:DE2232857A1
公开(公告)日:1974-01-17
申请号:DE2232857
申请日:1972-07-05
Applicant: BOSCH GMBH ROBERT
Inventor: HOEFER FRIEDRICH-WILHELM
Abstract: Apparatus which controls the flow of pressurized hydraulic fluid from a pump to a primary consumer or to a secondary consumer and from the primary consumer to the tank has a distributor valve whose spool changes its position in response to changes of fluid pressure in a control chamber wherein the fluid pressure is controlled by a pilot valve which can be actuated manually, electrically or by means of a fluid. A check valve which is interposed between the distributor valve and the primary consumer controls the speed of movement of the spool of the distributor valve to that position in which the primary consumer receives fluid. The secondary consumer receives fluid whenever the primary consumer is sealed from the pump. A further pilot-controlled valve is provided to control the flow of fluid from the primary consumer to the tank.
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公开(公告)号:DE3922517A1
公开(公告)日:1991-01-17
申请号:DE3922517
申请日:1989-07-08
Applicant: BOSCH GMBH ROBERT
Inventor: BECK WALTER , HOEFER FRIEDRICH-WILHELM
Abstract: A 3/3 way electromagnetic valve (30) is in the neutral circulation of a regulator valve (12). In a base position (31) it couples the neutral circulation and one side of the load (15) to a reservoir. In a first operating position, (32) it connects the neutral circulation to the reservoir (24), with a block to the load (15). In a second operating position (33) it connects the neutral to the load (15) with the reservoir connection blocked. USE/ADVANTAGE - Force lifts or lifting mechanisms for tractors of the type where a substantial load is lifted under power, but not lowered. Allows powered lowering with sensitive control and security.
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公开(公告)号:DE3522823A1
公开(公告)日:1987-01-02
申请号:DE3522823
申请日:1985-06-26
Applicant: BOSCH GMBH ROBERT
Inventor: ARNOLD WINFRIED , HESSE HORST DIPL ING DR , HOEFER FRIEDRICH-WILHELM , ROMES ROMAN , SCHUMACHER WERNER DIPL ING
IPC: A01B63/111
Abstract: What is proposed is an operating part (22) for the input of regulating quantities in an electrohydraulic lifting-unit regulating device (11) of a tractor (10), in which not only the basic settings for lift-out, desired value and mode of regulation, but additional settings are possible in three operating axes (34, 35, 36) by means of appropriately arranged adjusting elements (41 to 46). The second adjusting element (42) is arranged on a second, middle operating axis (35) as a handy operating knob for desired-value input which uses the same scale (51) together with the coaxial fourth adjusting element (44) for limiting the end position of the lifting unit (19) in the upward direction and clearly indicates the range between desired value and limitation. The order of priority of the end-position limitation on the fourth adjusting element (44) before a lower end-position limitation by the first adjusting element (41) working proportionally and of the latter before the desired value of the second adjusting element (42) allows an appropriate functional setting of the working range for the regulating device (11).
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公开(公告)号:DE3313039A1
公开(公告)日:1984-10-18
申请号:DE3313039
申请日:1983-04-12
Applicant: BOSCH GMBH ROBERT
Inventor: HOEFER FRIEDRICH-WILHELM
IPC: F15B11/08
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8.
公开(公告)号:DE3131116A1
公开(公告)日:1983-02-24
申请号:DE3131116
申请日:1981-08-06
Applicant: BOSCH GMBH ROBERT
Inventor: HOEFER FRIEDRICH-WILHELM
IPC: F15B13/06
Abstract: A control valve arrangement (10) for stacker trucks is proposed which serves to control two consumers in parallel at different pressure levels. It comprises at least two directional control valves (14, 15) in double-flow construction, from which, downstream of the latter valve, a circulation passage (26) allocated to the first flow and a distribution passage (25) allocated to the second flow are brought together via a first transverse connection (51). From there (51), a second transverse connection (56) leads via an additional directional control valve (12) in single-flow construction to the second circulation passage (27) upstream of the directional control valves in double-flow construction and further via these directional control valves to the tank (34). In this way, simple, standard directional control valves (12) in single-flow construction can be combined with directional control valves (14, 15) in double-flow construction and can control flows of different magnitude. In addition, different pressure protection measures can be carried out for both flows.
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公开(公告)号:DE2735558A1
公开(公告)日:1979-02-15
申请号:DE2735558
申请日:1977-08-06
Applicant: BOSCH GMBH ROBERT
Inventor: MAUCHER EDMUND DIPL ING , HOEFER FRIEDRICH-WILHELM , SCHWERIN GUENTHER
IPC: F15B11/02 , F15B11/08 , F15B13/04 , F15B13/042
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公开(公告)号:DE2244445A1
公开(公告)日:1974-03-21
申请号:DE2244445
申请日:1972-09-11
Applicant: BOSCH GMBH ROBERT
Inventor: HERRMANN JWALTER , GEISLER HEINRICH , HOEFER FRIEDRICH-WILHELM
Abstract: A control system for first and second double-acting hydraulic cylinders which respectively cause the endgate of a truck to pivot between open and closed positions and to move up or down. The flow of fluid into and from the lower chambers of the cylinders is controlled by discrete three-position twoway control valves, and the flow of fluid from the upper chamber of the first cylinder to a tank is controlled by an auxiliary valve assembly which acts as a pressure relief valve. If the endgate cannot displace the piston of the first cylinder due to its own weight, the auxiliary valve assembly is actuated to start a pump which delivers pressurized fluid to the upper chamber of the first cylinder. The upper chamber of the second cylinder can be connected directly to the tank or is connected with a line which conveys fluid from the upper chamber of the first cylinder to the auxiliary valve assembly.
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