Load supporting linkage with gas spring

• US 5,236,171 A
• Filed: 09/23/1991
• Issued: 08/17/1993
• Est. Priority Date: 11/07/1990
• Status: Expired due to Fees

• Current Assignee: Krister Borgh
• Original Assignee: Krister Borgh
• Inventors: Holmquist, Roland
• Primary Examiner(s): Johnson, Blair M.
• Application Number:
  US07/763,697
• Time in Patent Office: 694 Days
• Field of Search: 248/575, 248/584, 248/591, 248/595, 248/592, 248/284, 108/145, 108/144, 297/345, 297/DIG. 10, 267/118, 267/120, 267/113, 267/136
• US Class Current: 248/584
• CPC Class Codes: A47B 9/02 with balancing device, e.g. by springs, by weight

Abstract

Mechanism for movably supporting a load, comprises a fixed frame, a pendulum lever pivotally connected at one end to the frame, and a link pivotally connected at one end to the other end of the pendulum lever. The other end of the link is connected to a vertically movable load support. A gas spring is pivotally interconnected between the frame and the link at points spaced from the points of articulation of the link and pendulum lever to the frame and to each other. Provision is made for adjusting the position of the pivotal connection between the link and the gas spring lengthwise of the link, and for adjusting the position of the pivotal connection of the gas spring to the frame in a direction toward or away from the point of articulation of the pendulum lever to the frame. Guides for the load are provided, comprising rollers mounted on the frame in between which a vertical member slides vertically. The vertical member at its upper end supports the load and at its lower end is articulately interconnected to the link.

Claims

1. Mechanism for movably supporting a load, comprising a fixed frame, a pendulum lever having two ends, the pendulum lever begin pivotally connected at one end to the frame, a link having two ends, the link being pivotally connected at one end tot he other end of the pendulum lever, the other end of the link being connected to a vertically movably load support, a gas spring pivotally interconnected between the frame and the link at points spaced from the points of articulation of the link and pendulum lever to the frame and each other, means for adjusting the position of the pivotal connection between the link and the gas spring lengthwise of the link, and means for adjusting the position of the pivotal connection of the gas spring to the frame in a direction toward or away from the point of articulation of the pendulum lever to the frame.

2. A mechanism as claimed in claim 1, and further including means on the frame for guiding movement of a load vertically relative to the frame.

3. A mechanism as claimed in claim 2 wherein said guide means confuse rollers mounted on the frame and between which a vertical member slides vertically, said vertically member at its upper end supporting the load and at its lower end being articulately interconnected to the link.