Supports – Stand – Standard type
Reexamination Certificate
1999-06-30
2001-04-03
King, Anita M. (Department: 3632)
Supports
Stand
Standard type
C297S411360, C297S353000, C248S118000, C248S423000
Reexamination Certificate
active
06209840
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a mechanism for positioning a moveable member relative to a fixed member, and more particularly to a mechanism for the relative positioning of chair arm which may be adjusted with a button.
2. Description of Related Art
Various mechanisms for the relative positioning of telescopic members have been located in a search. For example, U.S. Pat. No. 5,388,892 discloses a mechanism for the relative positioning of telescoping members.
However, it is considered to have many components and thus complicated in structure. Further, these components are individually manufactured, resulting in the increase of manufacturing cost. Furthermore, these components are subject to be stuck in operation due to interfering with one another. To the worse, these components produce loud sounds when operated and have been found have a shorter life cycle due to abnormal wear.
SUMMARY OF THE INVENTION
It is thus an object of the present invention to provide a device which is simple in structure, easy in assembly, and simple in mechanism, and thus resulting in a decrease of noise, component wear, and an increase of life cycle.
The advantages of the present invention are realized by providing a mechanism for the relative positioning of chair arm comprising a shroud comprises a transverse first opening through two sides, a second opening disposed on a side and higher than the first opening, and a top plate; a supporting member includes a longitudinal cavity having a number of semi-circular notches on a side; a shuttle member comprises a vertical member having a slanted slot provided near the bottom, a top horizontal member having an opening where a riser is provided on a side parallel to the vertical member, a spring disposed on the riser being biased between the top horizontal member and the top plate, and a trigger button fastened to the top horizontal member; and a lock pin wherein the shuttle member is inserted into the shroud for enabling the top horizontal member to pass through the second opening for engaging the vertical member against the side of the shroud; put the shroud on the supporting member such that the lowermost semicircular notch coincidental with the first opening and the slanted slot; and insert the lock pin through the slanted slot, the first opening, and the lowermost semicircular notch to slidably secure together. As such, raising the trigger button will cause the lock pin to slide along the longitudinal cavity away from the semi-circular notches and release of the trigger button will cause the lock pin to move toward the desired notch for engagement therewith.
The above and other objects, features and advantages of the present invention will become apparent from the following detailed description taken with the accompanying drawings.
REFERENCES:
patent: 5382079 (1995-01-01), Wilson et al.
patent: 5664842 (1997-09-01), Tseng
patent: 5895095 (1999-04-01), Chen
patent: 5908221 (1999-06-01), Neil
King Anita M.
Pro-Techtor Inter-national Services
Wujciak A. Joseph
LandOfFree
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