US3781623A - Electro-mechanical lifting device - Google Patents

Electro-mechanical lifting device Download PDF

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Publication number
US3781623A
US3781623A US00290346A US3781623DA US3781623A US 3781623 A US3781623 A US 3781623A US 00290346 A US00290346 A US 00290346A US 3781623D A US3781623D A US 3781623DA US 3781623 A US3781623 A US 3781623A
Authority
US
United States
Prior art keywords
pressure
switching
pressure source
switch
run
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
US00290346A
Other languages
English (en)
Inventor
G Neumann
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.)
Hanning Elektro Werke GmbH and Co KG
Original Assignee
Hanning Elektro Werke GmbH and Co KG
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 Hanning Elektro Werke GmbH and Co KG filed Critical Hanning Elektro Werke GmbH and Co KG
Application granted granted Critical
Publication of US3781623A publication Critical patent/US3781623A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C20/00—Head-, foot- or like rests for beds, sofas or the like
    • A47C20/04—Head-, foot- or like rests for beds, sofas or the like with adjustable inclination
    • A47C20/048—Head-, foot- or like rests for beds, sofas or the like with adjustable inclination by fluid means
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C20/00—Head-, foot- or like rests for beds, sofas or the like
    • A47C20/04—Head-, foot- or like rests for beds, sofas or the like with adjustable inclination
    • A47C20/041—Head-, foot- or like rests for beds, sofas or the like with adjustable inclination by electric motors
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C31/00—Details or accessories for chairs, beds, or the like, not provided for in other groups of this subclass, e.g. upholstery fasteners, mattress protectors, stretching devices for mattress nets
    • A47C31/008—Use of remote controls
    • 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
    • F15B7/00—Systems in which the movement produced is definitely related to the output of a volumetric pump; Telemotors
    • F15B7/001—With multiple inputs, e.g. for dual control
    • 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
    • F15B7/00—Systems in which the movement produced is definitely related to the output of a volumetric pump; Telemotors
    • F15B7/003—Systems in which the movement produced is definitely related to the output of a volumetric pump; Telemotors with multiple outputs
    • 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
    • F15B7/00—Systems in which the movement produced is definitely related to the output of a volumetric pump; Telemotors
    • F15B7/005—With rotary or crank input
    • 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
    • F15B7/00—Systems in which the movement produced is definitely related to the output of a volumetric pump; Telemotors
    • F15B7/008—Systems in which the movement produced is definitely related to the output of a volumetric pump; Telemotors with rotary output
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
    • H01H3/24—Power arrangements internal to the switch for operating the driving mechanism using pneumatic or hydraulic actuator

Definitions

  • the present invention relates to an electromechanical lifting device, in particular for bed adjustments, in which the switching and control of the driving motor is operated pneumatically by means of a pressure source disposed in a hand switch, which pressure source is connected by means of a hose conduit with a switching device.
  • the operative connection is brought about such, that the switching device has a transfer lever, which, on the one hand is pivoted to the pressure transfer and on the other hand, is within the range of two switching levers for the two switches for the right run and the left run.
  • the cooperation of the joining device and of the switching lever is made possible advantageously such, that on the joining device are provided two cams having a certain distance from each other, which cams provide a U-shaped recess of the joining device, into which the switching levers extend.
  • FIGURE discloses a schematic elevation of a bed-adjusting unit.
  • the adjusting unit comprises a lifting device 1, by example, for the adjustment of the head portion, a lifting device I for the adjustment of the foot portion with a switching device 2 or 2, respectively, and a hand switch 3.
  • the lifting devices 1 or 1, respectively, comprise substantially a motor 10, which drives the spindle 11 over a drive (not shown) and over an axially immovable spindle nut.
  • the spindle 11 is surrounded by a protective tube 12, which is connected with the driving housing and the motor housing.
  • a protective tube 12 which is connected with the driving housing and the motor housing.
  • At the free ends of the spindle 11 and of the protective tube 12 are provided fork heads 13, on which is pivoted the rod arrangement (not shown) for the bed adjustment.
  • the essential parts belonging to the switching device 2, namely, the pressure transfer 21 and the two switches 23 and 24 are secured in a switch housing 20, which is equipped with a cover (not shown).
  • the pressure transfer member 21 can be a piston disposed in a cylinder, or, as shown, a membrane housing similar to folding bellows.
  • the axially immovable end wall of the membrane housing is secured at the housing 20, while the axially movable end side is connected pivotally with the one end of the two-armed transmission lever 22 pivoted to the housing 20.
  • switching levers 25 and 26 are pivoted thereto, the free ends of which are arranged within the swinging range of the other end of the transfer lever 22.
  • the two pressure sources 31 and 31' are provided, which in a shown embodiment are formed bellow-like, whereby the one side of the be]- lows is secured to the housing 30 of the manual switch, while the other end is equipped with an adjustment grip 32 and 32', respectively, which are retained in the center positions by springs 32a and 32b, respectively.
  • the pressure sources 31 and 31' are connected with the pressure transfers by means of hose conduits 4 and 4.
  • the pressure sources 31 and the pressure transfer member 21 connected therewith are shown in the drawing in the center position.
  • the transmission lever 22 receives thereby a position symmetrical to the two switching levers 25 and 26 in which the ends of the switching lever engage the thickened end of the transmission lever and the contacts of both switches 23 and 24 are open.
  • the adjustment grip 32 For the operation of the adjustment device and for switching on of the motor 10, respectively, the adjustment grip 32 must now be turned only either towards the left or towards the right in arrow direction. In the shown example the adjustment grip swings towards the left, whereby the volume of the pressure source 31' is enlarged and in the conduit 4' a pressure below atmospheric pressure has been produced.
  • the pressure transfer member 21 responding to this pressure below atmospheric pressure has accordingly reduced its volume and swings the transmission lever 22' such, that also the switching lever 25' swings out, the contacts of the switch 23' are closed and the motor 10 has been switched on, by example, for left run.
  • the motor is shut off, when the adjustment grip is brought again into a center position.
  • the switching device 2 and the housing 20, respectively is secured on the protective tube 12 and, on the other hand, a lifting rod means 14 is connected with a joining device 15.
  • the latter is equipped with two cams 16 and 17, which have a certain distance from each other and which provide a recess 18 and in relation to the switching device 2 are arranged such, that the ends of the switching levers 25 and 26 extend into the recess 18, and thus enter the operating range of the earns 16 and 17.
  • the joining device can be centered by two springs in the housing 20. The operation is easly determined from the drawing in the showing of the lifting device 1 Since the switch 23' is closed, the spindle moves with the lifting limiting rod in the direction of the arrow towards the right, likewise in accordance with the seting lever 25.
  • switching device having a pressure converter responding to pressure below atmospheric pressure, and to pressure above atmospheric pressure, with two end positions, said pressure converter being in operative connection selectively with a switch means for left-run and a switch means for right-run of said driving motor, two switching lever means for actuating each of said switch means, respectively, said switching device has a transmission lever, said transmission lever is pivoted at one portion to said pressure converter, and has another portion disposed adjacently between and within the range of said two switching lever means for switch means, respectively.
  • An electro-mechanical lifting device in particular for bed adjustments, comprising a driving motor including switching and control means, a pressure source received in a manual switch, pneumatic means for operation of said switching and control means, by means of said pressure source, a switching device connected by a hose conduit with said pressure source, I the volume of said pressure source being capable of being enlarged and of being reduced, said switching device having a pressure converter responding to pressure below atmospheric pressure, and to pressure above atmospheric pressure, with two end positions, said pressure converter being in operative connection selectively with a switch means for left-run and a switch means for right-run of said driving motor, said switching device has a transfer lever, said transfer lever is pivoted to said pressure converter, and disposed within the range of switching levers for said switches, a protective tube of said lifting device, a joining member, I lifting limiting rod means, said-switching means is secured to said protective tube, said joining member is secured to said lifting limiting means, and said switching levers are disposed within the operating range of said joining member.
  • the lifting device as set forth in claim 2, which includes two cams disposed on said joining member and having a predetermined distance from each other, said cams defining a U-shaped recess of said joining member, and said switching levers extend into said U-shaped recess.
  • said pressure source is equipped with a setting grip

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Nursing (AREA)
  • Invalid Beds And Related Equipment (AREA)
  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
  • Mechanical Control Devices (AREA)
  • Load-Engaging Elements For Cranes (AREA)
US00290346A 1971-09-20 1972-09-19 Electro-mechanical lifting device Expired - Lifetime US3781623A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2146934A DE2146934C3 (de) 1971-09-20 1971-09-20 Elektromechanisches Hubgerät

Publications (1)

Publication Number Publication Date
US3781623A true US3781623A (en) 1973-12-25

Family

ID=5820082

Family Applications (1)

Application Number Title Priority Date Filing Date
US00290346A Expired - Lifetime US3781623A (en) 1971-09-20 1972-09-19 Electro-mechanical lifting device

Country Status (13)

Country Link
US (1) US3781623A (enrdf_load_stackoverflow)
JP (1) JPS5545213B2 (enrdf_load_stackoverflow)
BE (1) BE788346A (enrdf_load_stackoverflow)
BR (1) BR7206514D0 (enrdf_load_stackoverflow)
CH (1) CH538422A (enrdf_load_stackoverflow)
DE (1) DE2146934C3 (enrdf_load_stackoverflow)
DK (1) DK132783C (enrdf_load_stackoverflow)
ES (1) ES406827A1 (enrdf_load_stackoverflow)
FR (1) FR2153349B1 (enrdf_load_stackoverflow)
GB (1) GB1389753A (enrdf_load_stackoverflow)
IT (1) IT967597B (enrdf_load_stackoverflow)
NL (1) NL169574C (enrdf_load_stackoverflow)
SE (1) SE383829B (enrdf_load_stackoverflow)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3946174A (en) * 1974-09-27 1976-03-23 Herbst John A Positive and negative pressure breath control device
US4844333A (en) * 1988-04-08 1989-07-04 Tridelta Industries, Inc. Spa side control unit
CN113851334A (zh) * 2021-09-28 2021-12-28 中铁工程装备集团有限公司 行程限位装置
CN113996413A (zh) * 2020-07-28 2022-02-01 阮正富 一种承托驱动装置及方法
US20240023720A1 (en) * 2022-07-21 2024-01-25 Chuan-Hang Shih Electric bed

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5756762Y2 (enrdf_load_stackoverflow) * 1978-11-02 1982-12-06
GB2210411B (en) * 1987-09-30 1992-05-27 Mangar Aids Ltd Improvements in or relating to compressed air supply apparatus
JP2745029B2 (ja) * 1989-09-28 1998-04-28 株式会社原織機製作所 ラップ形成装置から排出されたラップの切り口を規定位置に揃える方法、及びその装置

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3946174A (en) * 1974-09-27 1976-03-23 Herbst John A Positive and negative pressure breath control device
US4844333A (en) * 1988-04-08 1989-07-04 Tridelta Industries, Inc. Spa side control unit
CN113996413A (zh) * 2020-07-28 2022-02-01 阮正富 一种承托驱动装置及方法
CN113851334A (zh) * 2021-09-28 2021-12-28 中铁工程装备集团有限公司 行程限位装置
CN113851334B (zh) * 2021-09-28 2023-10-27 中铁工程装备集团有限公司 行程限位装置
US20240023720A1 (en) * 2022-07-21 2024-01-25 Chuan-Hang Shih Electric bed
US12114781B2 (en) * 2022-07-21 2024-10-15 Chuan-Hang Shih Electric bed

Also Published As

Publication number Publication date
DE2146934C3 (de) 1975-04-10
BE788346A (fr) 1973-01-02
NL7212496A (enrdf_load_stackoverflow) 1973-03-22
IT967597B (it) 1974-03-11
SE383829B (sv) 1976-04-05
CH538422A (de) 1973-06-30
DK132783B (da) 1976-02-09
FR2153349A1 (enrdf_load_stackoverflow) 1973-05-04
DE2146934A1 (de) 1973-03-22
JPS5545213B2 (enrdf_load_stackoverflow) 1980-11-17
FR2153349B1 (enrdf_load_stackoverflow) 1977-08-26
NL169574B (nl) 1982-03-01
BR7206514D0 (pt) 1973-07-24
ES406827A1 (es) 1976-01-16
DE2146934B2 (de) 1974-08-15
NL169574C (nl) 1982-08-02
DK132783C (da) 1976-07-05
JPS4840550A (enrdf_load_stackoverflow) 1973-06-14
GB1389753A (en) 1975-04-09

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