Extensible height-adjustable swivel arm for supporting a display or the like

• US 4,708,312 A
• Filed: 10/10/1986
• Issued: 11/24/1987
• Est. Priority Date: 10/23/1985
• Status: Expired due to Fees

• Current Assignee: NCR Corporation
• Original Assignee: NCR Corporation
• Inventors: Rohr, Lorenz
• Primary Examiner(s): Ramirez, Ramon O.
• Application Number:
  US06/918,174
• Time in Patent Office: 410 Days
• Field of Search: 248/280.1, 248/282, 248/283, 248/293, 248/289.1, 248/585, 248/279, 248/106
• US Class Current: 248/281.11
• CPC Class Codes: F16M 11/14 with ball-joint ball-jointed hinges F16C11/06 ; adjustable mountings employing universal joints for lighting devices F21V21/26 - F21V21/30
• CPC Class Codes: F16M 11/2014 around a vertical axis F16M11/2035 takes precedence
• CPC Class Codes: F16M 11/2092 comprising means allowing depth adjustment, i.e. forward-backward translation of the head relatively to the undercarriage
• CPC Class Codes: F16M 11/24 changeable in height or length of legs, also for transport only, e.g. by means of tubes screwed into each otherF16M11/42 takes precedence
• CPC Class Codes: F16M 13/022 repositionable
• CPC Class Codes: F16M 2200/044 for balancing rotational movement of the undercarriage
• CPC Class Codes: F16M 2200/063 Parallelogram arms
• CPC Class Codes: F16M 2200/065 with a special structure, e.g. reinforced or adapted for space reduction
• CPC Class Codes: Y10S 248/919 Adjustably orientable video screen support
• CPC Class Codes: Y10S 248/921 Plural angular

Abstract

A swivel arm structure suitable for supporting a video display apparatus or the like and for positioning such apparatus with substantial discretion and ease. A first, horizontally movable arm is pivotally attached to a fixedly mounted base, which movable arm can be articulated at multiple movement interrelated joints within the horizontal plane. A vertically translating parallelogram type linkage is attached at one end to the horizontally articulatable arm and at the other end supports the apparatus. In one form one linkage member is situated within the tubelike structure of the other linkage member. The swivel arm can be freely moved, without angle induced binding of hinges, to position the apparatus.

Claims

1. A swivel arm structure, comprising:

a base for fixedly supporting the structure;

an articulated member of three elements, the first element rotatable at its first end about the vertical axis of the base, a second element attached at its first end to a second end of the first element and rotatable about the vertical axis at such attachment, and a third element attached at its first end to a second end of the second element and rotatable about the vertical axis at such attachment;

a parallel lever arrangement translatable in the vertical plane, attached at one end to the second end of the third element; and

an apparatus support attached to the second, oppositely disposed end of the parallel lever arrangement.

2. The structure recited in claim 1, wherein the parallel lever arrangement is comprised of a first tubelike lever and a second lever arranged therein.

3. The structure recited in claim 2, further including a spring element arranged within the first lever connected to act on the articulated member and the apparatus support.

4. The structure recited in claim 1, wherein the second element includes a gear arrangement for relating horizontal plane movement between the first and third elements.

5. The structure recited in claim 2, wherein the second element includes a gear arrangement for relating horizontal plane movement between the first and third elements.

6. The structure recited in claim 4, wherein the gear arrangement includes a pair of meshing gears in the second element which further individually mesh gear teeth on the first and third elements.

7. The structure recited in claim 5, wherein the gear arrangement includes a pair of meshing gears in the second element which further individually mesh gear teeth on the first and third elements.