Motors: expansible chamber type – With motive fluid valve – Relatively movable inlet and exhaust valves for single...
Patent
1997-06-23
1998-11-24
Nguyen, Hoang
Motors: expansible chamber type
With motive fluid valve
Relatively movable inlet and exhaust valves for single...
91459, F15B 1108, F15B 13044
Patent
active
058393455
ABSTRACT:
A hydraulic circuit in a monoblock structure for lifting and lowering a load has at least two electromagnetically actuatable proportional distributing valve elements, a check valve, a pressure balance for load-independent lifting of the load as an input element, a housing accommodating at least some of the elements and having at least one pump connection, at least one consumer connection, and at least one return connection, the proportional distributing valve elements being disposed parallel to one another, electromagnetic drives seated side-by-side on a same side and at a same height, the pressure balance having a piston which is disposed coaxially next to a longitudinal slide of a first one of the proportional distributing valve elements in a bore that guides and supports both the valve elements, the longitudinal slide of the first proportional distributing valve elements being spring-loaded, and at least one component for adjusting a prestressing and bracing of a spring on the housing of a control penetrating the piston of the pressure balance.
REFERENCES:
patent: 4362018 (1982-12-01), Torii
patent: 4611528 (1986-09-01), Nanda et al.
patent: 5072648 (1991-12-01), Krahn et al.
patent: 5372060 (1994-12-01), Maruyama et al.
patent: 5374794 (1994-12-01), Holmes
patent: 5522479 (1996-06-01), Jo
Lueues Holger
Sandau, deceased Hartmut
Schumacher Werner
Trucksess Rainer
Nguyen Hoang
Robert & Bosch GmbH
Striker Michael J.
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