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US 5,348,260 AGranted
Movable supporting arm
AssigneeHughes Aircraft Company
InventorRodolfo J. Acevedo
Life of this patent
Estimating the term…
Abstract
The movable supporting arm is mounted on a pivot pin at its inner end on a wall or base. The outer end is spring counter-balanced by an adjustable spring and there is a friction brake which controls movement and locks the arm in position. The friction brake and arm can both be mounted with the same hand so that the supporting arm can be moved into position and locked in position.
Claims18
A positionable supporting arm comprising:
- a pivot post, means for engaging said pivot post for supporting said arm;
- an arm housing adjacent said pivot post, a pivot pin engaging said pivot post and said arm housing;
- a mounting post, a pivot pin engaging said arm housing and said mounting post;
- a connecting rod, a pivot pin interconnecting said connecting rod and said pivot post, a pivot pin interconnecting said connecting rod and said mounting post, said pivot pins being positioned so that said mounting post always lies substantially parallel to said pivot post;
- a counter-balance spring engaged between said connecting rod and one of said posts so as to urge said mounting post upward when said pivot posts and said mounting posts are in an upright position, wherein said counter-balance spring includes a spring block movably mounted with respect to said connecting rod, and further includes means to position said spring block at a selected position with respect to said pivot post, and wherein said spring block comprises a threaded screw engaged between said pivot post and said tension block and said spring is a compression spring;
- and
- means interconnecting said connecting rod and said arm housing to claim said connecting rod to said arm housing to position said mounting post in a selected position.
4 more elements
A supporting arm comprising:
- an arm housing;
- a pivot post, a pivot pin pivotally mounting said pivot post to said arm housing;
- a mounting post, a pivot pin pivotally mounting said mounting post to said arm housing, said arm housing being an inverted U-shaped housing with side walls, said pivot post and said mounting post extending into said arm housing between said side walls, said pivot pins engaging through said side walls, said pivot posts and said mounting post being bifurcated between said arm housing side walls;
- a connecting rod, said connecting rod being positioned within said arm housing and lying within said bifurcated pivot post and bifurcated mounting post, a pivot pin pivotally interconnecting said connecting rod to said pivot post and a pivot pin pivotally interconnecting said connecting rod to said mounting post, said pivot pins being so positioned that said posts lie substantially parallel to each other;
- means interconnecting one of said posts and said connecting rod to urge said mounting post upward when said mounting post and said pivot posts are in an upright position, said means comprising a spring block slidably mounted on said connecting rod, a compression spring engaged between said spring block and said connecting rod and an adjustable tension screw engaged between said pivot post and said spring block;
- and
- means to clamp said connecting rod to said arm housing when said mounting post is in a selected position.
4 more elements
Dependencies are inferred from the claim text.