Power adjustment size indicator for a door closer

Details Power adjustment size indicator for a door closer Power adjustment size indicator for a door closer

1999-10-15

2001-09-04

Brittain, James R. (Department: 3626)

Miscellaneous hardware (e.g., bushing, carpet fastener, caster,

Closers

Spring and gear

C016S277000, C016S071000, C016S072000

Reexamination Certificate

active

06282750

ABSTRACT:

BACKGROUND OF THE INVENTION
This invention relates generally to door closers and more particularly to door closers having a means for adjusting the closing force of the door closer.
Door closers are sized using ANSI 1154 standards or other international standards. The ANSI standards specify, among other requirements, the minimum closing force required for the door to be specified as a size 1, 2, 3, 4, 5, or 6. The higher the size, the greater the closing force of the door closer and thus the door.
Current door closers typically provide a means to increase and decrease this closing force. One prior art adjustable door closer is shown in FIG.
1
. This is accomplished by changing the pre-load on the closer spring. The adjustment means is typically a screw at the end of the closer; rotating the screw in one direction increases the pre-load; rotating in the other direction decreases the pre-load. Typically, the installation instruction sheet informs the installer of the number of rotations and the direction to turn the adjustment screw for specific size doors.
A problem arises in that as the screw is turned, and the door closer is adjusted, there is no indicator showing the ANSI size.
The foregoing illustrates limitations known to exist in present door closers. Thus, it is apparent that it would be advantageous to provide an alternative directed to overcoming one or more of the limitations set forth above. Accordingly, a suitable alternative is provided including features more fully disclosed hereinafter.
SUMMARY OF THE INVENTION
In one aspect of the present invention, this is accomplished by providing a size indicator for use with a door closer having a rotary adjustable closing force means, the size indicator comprising: a rotatable dial indicator positioned about the rotary adjustable closing force means, the rotatable dial indicator having a plurality of indicia thereon; and a gear assembly operably connecting the rotary adjustable closing force means to the rotatable dial indicator.
The foregoing and other aspects will become apparent from the following detailed description of the invention when considered in conjunction with the accompanying drawing figures.


REFERENCES:
patent: 4590639 (1986-05-01), Fritsche et al.
patent: 4686739 (1987-08-01), Fritsche et al.
patent: 4783882 (1988-11-01), Frolov
patent: 5265306 (1993-11-01), Yu
patent: 2574554-A1 (1986-06-01), None
patent: 2158148-A (1985-11-01), None
patent: 2180294-A (1987-03-01), None
patent: 2 180 294 A (1987-03-01), None

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