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Monitor arm with constant counterbalance
| Details |
Inventors: Buccieri, Michael; Johnson, Teddy L.; Ruehl, John W.; Vogel, John D.;
Assignee: Hill-Rom, Inc. (Batesville, IN)
Primary Examiner: Stodola; Daniel P.
Assistant Examiner: Strimbu; Gregory J.
Attorney, Agent or Firm: Barnes & Thornburg
A monitor arm includes a mounting assembly adapted to be coupled to a support structure and a parallelogram mechanism coupled to the mounting assembly. The parallelogram mechanism includes a support member adapted to couple to an object, such as a computer monitor, a first arm pivotably coupled to the mounting assembly at a first pivot axis and pivotably coupled to the support member at a second pivot axis, and a second arm pivotably coupled to the mounting assembly at a fifth pivot axis and pivotably coupled to the support member at a fourth pivot axis. The monitor arm includes a counterbalancer having a first end coupled to the mounting assembly at a third pivot axis and a second end coupled to the first arm at the second pivot axis. The third pivot axis is vertically above and vertically aligned with the first and fifth pivot axes. The mounting assembly includes an adjustment mechanism for adjusting the position of the third pivot axis relative to the first and fifth pivot axes to adjust a counterbalancing force exerted on the parallelogram mechanism by the counterbalancer. |
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DETAILED DESCRIPTION The present invention relates to supports for supporting objects in spaced-apart relation with support structures, and particularly to a monitor arm with constant counterbalance for supporting an object such as a monitor in a position spaced apart from the support structure.
More particularly, the present invention relates to monitor arms for supporting objects such as a cathode ray tube monitor connected to computerized equipment so that the monitor is positionable relative to the support structure to which the arm is coupled for easy viewing of the monitor by the user.
Arms for mounting and supporting computer and television monitors relative to a wall, a column, or another support structure are well known.
Conventional mounting arms are typically mounted to the support structure so that the monitor can be moved between a stored position adjacent to the support structure and a viewing position spaced apart from the support structure.
See, for example, U.
S.
Pat.
No.
5,108,063 to Koerber, Sr.
et al.
, that is assigned to the assignee of the present invention, and that discloses an extendable and retractable computer mounting arm for mounting a computer to the wall of a patient treatment room.
When the computer mounting arm is in the retracted position the computer is stored close to the wall and when the computer mounting arm is in the extended position the computer is spaced apart from the wall.
Some conventional mounting arms rely on frictional contact between moving parts to hold the monitor in the desired position relative to the support structure.
Such systems require that the frictional forces overcome the force of gravity acting on the mounting arm and the monitor carried by the mounting arm.
Other conventional mounting arms include springs or other biasing means to counterbalance at least a portion of the weight supported by the mounting arm.
See, for example, U.
S.
Pat.
No.
4,836,478 to Sweere which discloses a parallelogram arm assembly having a pneumatic pressure cylinder positioned to lie between upper and lower support arms of the parallelogram arm assembly and extending generally diagonally from an upper support arm of the parallelogram arm assembly to an adjustment slide that can be moved along a non-horizontal and non-vertical guide channel to extend and contract the pneumatic cylinder
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Communications 
