EP1161929B1 - Système hydraulique pour une table, en particulier table d'opération, comprenant plusieurs consommateurs hydrauliques - Google Patents

Système hydraulique pour une table, en particulier table d'opération, comprenant plusieurs consommateurs hydrauliques Download PDF

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Publication number
EP1161929B1
EP1161929B1 EP20010112348 EP01112348A EP1161929B1 EP 1161929 B1 EP1161929 B1 EP 1161929B1 EP 20010112348 EP20010112348 EP 20010112348 EP 01112348 A EP01112348 A EP 01112348A EP 1161929 B1 EP1161929 B1 EP 1161929B1
Authority
EP
European Patent Office
Prior art keywords
valves
pump
valve
hydraulic system
hydraulic
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP20010112348
Other languages
German (de)
English (en)
Other versions
EP1161929A2 (fr
EP1161929A3 (fr
Inventor
Ludolf Schmitz
Stefan Tschepe
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Schmitz & Sohne & Co KG GmbH
Original Assignee
Schmitz & Sohne & Co KG GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Schmitz & Sohne & Co KG GmbH filed Critical Schmitz & Sohne & Co KG GmbH
Publication of EP1161929A2 publication Critical patent/EP1161929A2/fr
Publication of EP1161929A3 publication Critical patent/EP1161929A3/fr
Application granted granted Critical
Publication of EP1161929B1 publication Critical patent/EP1161929B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/10—Special arrangements for operating the actuated device with or without using fluid pressure, e.g. for emergency use
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G13/00—Operating tables; Auxiliary appliances therefor
    • A61G13/02—Adjustable operating tables; Controls therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B20/00—Safety arrangements for fluid actuator systems; Applications of safety devices in fluid actuator systems; Emergency measures for fluid actuator systems
    • F15B20/002—Electrical failure

Definitions

  • the invention relates to a hydraulic system for a plurality of hydraulic consumers having table or the like., In particular operating table, with the features of the preamble of claim 1.
  • Tables are also known with a mechanical valve and a foot pump, which can also be equipped with an electric pump in the same hydraulic circuit. Emergency operation is possible without the use of electrics, but the ease of operation during normal operation is limited by the fact that the mechanical valve must be operated by hand or foot. A comfortable manual, in particular by infrared transmission, is not possible or only with disproportionate effort.
  • a hydraulic system for a plurality of hydraulic consumers having hospital bed with at least one pump which provides the consumers either a flow from a tank available via valves, wherein between the tank and the consumers a first conveyor with an electrically operated pump and electrically operated valves and a separate second conveying path with a mechanical pump and mechanical valves is provided.
  • a hydraulic system for a plurality of hydraulic consumers having hospital bed with at least one pump is known, which provides the consumers either a flow from a tank available via valves, wherein between the tank and the consumers a first conveyor with an electrically operated pump and electrically operated valves and a separate second conveying path with a mechanical pump and mechanical valves is provided.
  • an automatic reliable separation of the two conveying paths is not possible, so that e.g. Uncontrolled movements of the connected hydraulic consumers can occur.
  • the object of the invention is to provide a hydraulic system, which automatically and reliably separates the two conveyor paths from each other, with the most space-saving accommodation of the hydraulic system should be possible.
  • switching valves are arranged between the consumers and the electrically operated valves or the mechanical valves, such that the flow to each consumer provided either by the electrically operated pump or the foot pump
  • the mechanical valves are formed by a spool valve having an inlet connected to the tank and a plurality of outlets connected to the switching valves, the spool valve having a cylinder with lateral outlets and a piston with piston rod movable therein, a continuous internal bore in the piston rod is designed as an input.
  • a hydraulic system is thus provided for a table, in particular an operating table, which has two separate working ones Pumps with valve system used.
  • a complete operation of the table is possible at any time without further preparations, no matter which component of the electrical system fails.
  • the table with its electrical components offers up-to-date operating convenience with full manual switching and the option of an infrared remote control.
  • the combination of the two system components via the switching valves quasi automatically, without the user noticing this, ie when the electrical system fails, the user can immediately activate the mechanical system via the foot pump and press the respective component by adjusting the mechanical valve, without that further measures are needed.
  • the only conceivable error of these change-over valves is an increased leakage rate during operation (eg due to contamination), but this is irrelevant to the function of the table. Due to the design of the mechanical system this is to save space in the table.
  • a change-over valve is arranged at the respective outlet of the slide valve outside the cylinder.
  • the switching valve preferably has on the underside each an input from the respective output of the slide valve and thus aligned on the opposite side an input from the associated electrically operated valve and transversely to an output to the respective consumer, wherein the inputs are closed in the rest position by means of a common closure ball.
  • the switching valves and the slide valve form a common structural unit, whereby a very compact assembly is formed, which can be integrated into the base of the operating table in a simple and space-saving manner.
  • the hydraulic oil of the foot pump through the The inner bore of the piston rod and the piston, depending on the position of the slide valve, are directed from below into one of the changeover valves.
  • the hydraulic oil of the electric pump is in contrast passed via Hydraulikrohre- and -schraschraonne from above into the respective changeover valve.
  • the consumers are connected via lines on the side of the changeover valves.
  • the balls arranged in the changeover valves either release the input from the slide valve or the inlet from the connection fitting to the solenoid valve or close it.
  • the foot pump is depressurized via a coupled with the electric pump solenoid valve. Immediately after stopping the electric pump then the foot pump is used again.
  • the hydraulic oil is passed via hoses and / or hydraulic pipes to the respective consumer (eg hydraulic cylinder).
  • each consumer eg hydraulic cylinder
  • each consumer is equipped with two check valves arranged one behind the other, which act redundantly. These two valves in turn form a very compact unit in a housing. This means that the hydraulic oil has to pass through two blocking stages one after the other, leakage of one stage does not impair the Functions. Due to the fixed attachment of the check valves even the hydraulic hoses can be cut in the table in extreme cases, without there being a direct safety risk.
  • a table column 3 is arranged, which is equipped with a height-adjustable cover plate 4, on which an operating table upper part, not shown, can be mounted.
  • a plurality of hydraulic consumers are provided, which are shown only partially in the drawings.
  • a not-shown lifting cylinder is provided as a further hydraulic consumer for height adjustment, the hydraulic connections are designated in Fig. 3 with 7.
  • the hydraulic connection lines (pressure lines) for the two cylinders 5 and 6 are designated 8 in FIG.
  • the hydraulic system initially has a tank 9.
  • a mechanical foot pump is integrated, which is connected via a shaft 10 with a foot pump lever 11.
  • the hydraulic system also has an electric pump, preferably an electrohydraulic pump 12, which is connected to the tank 9 via a suction line 13.
  • the hydraulic system has two delivery paths between the tank 9 and the consumers (cylinders 5 and 6 as well as lifting cylinder), wherein the first delivery path includes the electric pump 12 and the second delivery path includes the mechanical foot pump.
  • the second conveying path has a pressure line 14 in the form of a pipe, which opens into a further pressure line 15 designed as a flexible hose line.
  • These pressure lines 14, 15 establish a connection between the tank 9 via the foot pump to mechanically actuated switching valves, which establish a connection with the respective consumer depending on the position of the mechanically operated switching valves.
  • These mechanically operated switching valves are formed in the embodiment of a slide valve 16, whose structure best in Figs. 5 to 8 is shown.
  • This slide valve 16 has a cylinder 17, in which a piston rod 18 is guided with piston 19, wherein the piston rod 18 is provided with a continuous inner bore 20 which serves as an input into the slide valve 16, to which a connection element 21 is provided which the end of the pressure line 15 is connected by the foot pump.
  • a plurality of outputs or output holes 21 are provided, which are connected in the manner described in more detail below with the hydraulic consumers.
  • the tank 9 is connected via the inner bore 20 and the piston 19 with an outlet 21 in hydraulic communication and allows the supply of hydraulic oil to the relevant consumer.
  • a switching lever 22 is shown in Fig. 1, which is formed in the embodiment of three actuators on a common weldment.
  • This switching lever 22 is a display element 23 for indicating the selected position of the spool valve 16 is provided, further, a connecting rod 24 is provided for connecting the switching lever 22 with the piston rod 18 of the spool valve 16.
  • the slide valve 16 can thus be adjusted so that from the tank 9 via the foot pump, a hydraulic connection to the respective hydraulic consumer associated output 21 of the slide valve 16 is made.
  • the first delivery path from the tank 9 via the electric pump 12 includes, in addition to the suction line 13 from the tank 9 to the electric pump 12, a pressure line 25 which leads to electrically actuated solenoid valves 26, which serve, depending on the operation of the respective solenoid valve 26, a connection between the tank. 9 via the electric pump 12 to the respective hydraulic consumer available.
  • a manual switch 40 is otherwise indicated in Fig. 1.
  • the combination of the two delivery paths from the tank 9 to the consumers is such that between the electrically operated solenoid valves 26 and the mechanical valves, ie the spool valve 16 switching valves 27 are provided which serve the flow from the tank 9 to the respective consumer either of the To provide electric pump 12 via the first conveying path or the foot pump via the second conveying path.
  • These changeover valves 27 are preferably formed in the illustrated embodiment as a unit with the slide valve 16.
  • the respective switching valve 27, which are integrated in the embodiment all in a common block, in alignment with the outputs 21 of the slide valve 16 each have a lower side input 28 and thus aligned on the opposite upper side an input 29, to each of which a connecting line 30th connected to the solenoid valves 26.
  • each switching valve 27 Transverse to the inputs 28 and 29, each switching valve 27 has an output 31, the inputs 28 and 29 are closed in the rest position in each case by means of a common closure ball 32.
  • a solenoid valve 38 connected in parallel with the electric pump 12 may be provided with a bypass line 39.
  • the foot pump is then depressurized via this solenoid valve 38. Immediately after stopping the electric pump 12, the foot pump is then used again.
  • both the foot pump and the electric pump 12 are simultaneously actuated, so that it is possible, depending on the position of the solenoid valves 26 and the slide valve 16 to operate simultaneously several functions of the operating table.
  • 41 ports are designated for collection of the recirculated hydraulic oil (valves and electric pump).

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • Biomedical Technology (AREA)
  • Analytical Chemistry (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Accommodation For Nursing Or Treatment Tables (AREA)

Claims (6)

  1. Système hydraulique pour une table ou similaire comprenant plusieurs consommateurs hydrauliques (5, 6), notamment table d'opération, comprenant au moins une pompe, laquelle met à disposition de manière sélective aux consommateurs (5, 6) un courant de transport provenant d'un réservoir (9) par l'intermédiaire des soupapes, un premier trajet de transport doté avec une pompe (12) actionnée électriquement et des soupapes (26) actionnées électriquement et un second trajet de transport séparé avec une pompe mécanique, notamment une pompe à pied, et des soupapes mécaniques (16), étant prévus entre le réservoir (9) et les consommateurs (5, 6, 7),
    caractérisé en ce que
    des soupapes d'inversion (27) sont disposées entre les consommateurs (5, 6, 7) et les soupapes (26) actionnées électriquement et/ou les soupapes mécaniques (16), de telle sorte que le courant de transport en direction du consommateur (5, 6, 7) respectif est mis à disposition soit par la pompe actionnée électriquement (12) soit par la pompe à pied, les soupapes mécaniques étant formées par une soupape à coulisse (16) dotée d'une entrée (20) reliée au réservoir (9) et de plusieurs sorties (21) reliées aux soupapes d'inversion (27), la soupape à coulisse (16) comprenant un cylindre (17) doté de sorties latérales (21) et un piston (19) mobile dans celui-ci, doté d'une tige de piston (18), un alésage interne (20) continu étant formé comme entrée dans la tige de piston (18).
  2. Système hydraulique selon la revendication 1,
    caractérisé en ce que
    respectivement une soupape d'inversion (27) est disposée sur la sortie (21) respective de la soupape à coulisse (16) à l'extérieur du cylindre (17).
  3. Système hydraulique selon la revendication 2,
    caractérisé en ce que
    la soupape d'inversion (27) comprend sur la face inférieure une entrée (28) de la sortie (21) respective de la soupape à coulisse (16) et de ce fait, alignée sur la face opposée, avec une entrée (29) de la soupape actionnée électriquement (26) associée et transversalement à celle-ci une sortie (31) en direction du consommateur (5, 6, 7) respectif, les entrées (28, 29) en position de repos étant fermées au moyen d'une bille de fermeture (32) commune.
  4. Système hydraulique selon l'une quelconque des revendications 1 à 3, caractérisé en ce que
    les soupapes d'inversion (27) et la soupape à coulisse (16) forment une unité de construction commune.
  5. Système hydraulique selon l'une quelconque des revendications 1 à 4,
    caractérisé en ce que
    la pompe à pieds peut être commutée sans pression par une soupape électropneumatique (38) couplée à l'électropompe (12).
  6. Système hydraulique selon l'une quelconque des revendications 1 à 5,
    caractérisé en ce que
    chaque consommateur (5, 6) est équipé de deux soupapes antiretour (35 et/ou 36) disposées l'une derrière l'autre.
EP20010112348 2000-06-09 2001-05-21 Système hydraulique pour une table, en particulier table d'opération, comprenant plusieurs consommateurs hydrauliques Expired - Lifetime EP1161929B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2000128652 DE10028652C1 (de) 2000-06-09 2000-06-09 Hydrauliksystem für einen mehrere hydraulische Verbraucher aufweisenden Tisch, insbesondere Operationstisch
DE10028652 2000-06-09

Publications (3)

Publication Number Publication Date
EP1161929A2 EP1161929A2 (fr) 2001-12-12
EP1161929A3 EP1161929A3 (fr) 2004-04-07
EP1161929B1 true EP1161929B1 (fr) 2006-05-17

Family

ID=7645274

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20010112348 Expired - Lifetime EP1161929B1 (fr) 2000-06-09 2001-05-21 Système hydraulique pour une table, en particulier table d'opération, comprenant plusieurs consommateurs hydrauliques

Country Status (3)

Country Link
EP (1) EP1161929B1 (fr)
DE (2) DE10028652C1 (fr)
PL (1) PL347880A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2393647A (en) * 2002-10-04 2004-04-07 Eschmann Holdings Ltd Surgical table with integral power supply
DE202004019028U1 (de) * 2004-12-09 2005-09-08 Schmitz & Söhne GmbH & Co. KG Hubeinrichtung für einen Tisch, insbesondere einen Operationstisch
AT504791B1 (de) * 2007-04-23 2008-08-15 Hoerbiger Automatisierungstech Pumpenanordnung
CN103584971B (zh) * 2013-11-20 2015-08-05 赵小祺 一种手术台
CN106574640B (zh) * 2014-10-23 2018-07-31 南京迈瑞生物医疗电子有限公司 手术台液压驱动系统
GB2567657B (en) * 2017-10-18 2019-10-23 Eschmann Holdings Ltd Surgical tables

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2202216A (en) * 1936-05-15 1940-05-28 Sullivan Machinery Co Feed controlling apparatus
US4751754A (en) * 1987-04-02 1988-06-21 Hill-Rom Company, Inc. Dual hydraulic hospital bed with emergency bypass circuit
US5063624A (en) * 1990-05-08 1991-11-12 Stryker Corporation Manual/electric twin jack bed
DE4301547C2 (de) * 1992-07-25 2002-03-21 Knapp Micro Fluid Gmbh Elektrohydraulisches Antriebssystem für Geräte zur Personen- oder Patientenlagerung
US6352240B1 (en) * 1999-05-13 2002-03-05 Hill-Rom Services, Inc. Hydraulic control apparatus for a hospital bed

Also Published As

Publication number Publication date
EP1161929A2 (fr) 2001-12-12
PL347880A1 (en) 2001-12-17
DE10028652C1 (de) 2002-02-28
EP1161929A3 (fr) 2004-04-07
DE50109785D1 (de) 2006-06-22

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