Lifting device

• US 5,305,482 A
• Filed: 03/24/1992
• Issued: 04/26/1994
• Est. Priority Date: 03/28/1991
• Status: Expired due to Fees

• Current Assignee: Dewert Antriebs-Und Systemtechnik GmbH& Company KG (Phoenix Mecano AG)
• Original Assignee: Dewert Antriebs-Und Systemtechnik GmbH& Company KG (Phoenix Mecano AG)
• Inventors: Dewert, Eckhart
• Primary Examiner(s): TRETTEL, MICHAEL
• Application Number:
  US07/872,968
• Time in Patent Office: 763 Days
• Field of Search: 5/611, 5/616, 5/617, 5/634, 254/7 R, 254/7 B, 254/7 C, 254/98
• US Class Current: 5/616
• CPC Class Codes: A47C 20/041 by electric motors
• CPC Class Codes: A47C 31/008 Use of remote controls
• CPC Class Codes: B66F 7/065 Scissor linkages, i.e. X-configuration

Abstract

A lifting device for turnable parts of a furniture article has a scissors-type element, an electric motor actuating the scissors-type element and having a driven member formed as a rotatable nut, and a stationary threaded spindle on which the electric motor is displaceable.

Claims

1. A furniture article, comprising a furniture article unit with turnable parts;

and a lifting device for said turnable parts of said furniture article unit, said lifting device including a scissors-type element mountable directly on said furniture article unit, means for mounting said scissors-type element directly on said furniture article unit, an electric motor actuating said scissors-type element and having a driven member formed as a rotatable nut, and a stationary threaded spindle on which said electric motor is displaceable.

2. A furniture article as defined in claim 1, wherein said motor is a low voltage direct current gear motor.

3. A furniture article as defined in claim 1, wherein said nut is formed as an internally threaded nut.

4. A furniture article as defined in claim 1, wherein said electric motor is displaceable on said threaded spindle to a center of said threaded spindle.

5. A furniture article as defined in claim 1, wherein said driven member formed as a nut is externally threaded.

6. A furniture article as defined in claim 1;

and further comprising a power unit connectable with an electrical network.

7. A furniture article as defined in claim 6, wherein said power unit has at least one terminal for its operation.

8. A furniture article as defined in claim 1;

and further comprising an actuating element to be actuatable by a user for actuating the lifting device.

9. A furniture article as defined in claim 8, wherein said actuating element is a hand switch.

10. A furniture article as defined in claim 1, wherein said scissors-type element, said electric motor and said threaded spindle have a width such that for storage and transportation of a furniture article provided with the lifting device they are foldable underneath the furniture element and do not increase its width.

11. A lifting device for turnable parts of a furniture article, comprising a scissors-type element;

an electric motor actuating said scissors-type element and having a driven member formed as a rotatable nut; and

a stationary threaded spindle on which said electric motor is displaceable, said scissors-type element having a steplessly displaceable wing and a stationary wing, and two scissors arms, said scissors arms having first ends rotatably supported on said wings and second ends displaceably guided on said wings.

12. A lifting device as defined in claim 11, wherein said threaded spindle extends parallel to and at a distance from said wings.

13. A lifting device as defined in claim 11, wherein said threaded spindle has an end associated with said first ends of said scissors arms and provided with a fork head;

and further comprising an angle lever pivotally connected with said end and rotatably supported on one of said scissors arms.

14. A lifting device as defined in claim 13, wherein said electric motor is arranged on said threaded spindle in a region of the threaded spindle which faces away of said fork head.

15. A lifting device as defined in claim 13, wherein said threaded spindle has an end facing away of said fork head and provided with a closure cap and a center region provided with an abutment for actuating said electric motor when said closure cap or said abutment is contacted.

16. A lifting device as defined in claim 15, wherein said abutment is displaceable so as to change an adjustment height of said scissors-type element.

17. A lifting device as defined in claim 13, wherein said angle lever has an end facing away of said fork head and provided with a force transmitting roller, said roller engaging one of said scissors arms and contacting a surface facing said threaded spindle.

18. A lifting device as defined in claim 17, wherein said force transmitting roller is arranged so that it applies a force only during spreading of said scissors type element.

19. A lifting device as defined in claim 11, wherein said second ends of said scissors arms are provided with sliding members formed as flat members for relatively low tilting moments and stabilization of said scissors element, said sliding members being arranged so that a small gap is maintained between said sliding members and said scissors arms.

20. A lifting device for turnable parts of a furniture article, comprising a scissors-type element;

an electric motor actuating said scissors-type element and having a driven member formed as a rotatable nut;

a stationary threaded spindle on which said electric motor is displaceable; and

a fork on which said electric motor is suspended, said fork having a beam which is fixed on one of said scissors arms.

21. A lifting device as defined in claim 20;

and further comprising a lever, said beam being formed as an end of said lever which faces away of said electric motor, said lever being composed of two bent lever members which are connected with one another.