Abstract:
An adjustable arm chair bracket which will attach a chair arm rest to a chair. The arm rest can then be adjusted to suit individuals of different sizes. The bracket has three arms, one of which is connected to the chair, the second has the arm rest attached thereto, and the third arm connects the first and second arm. Spring biased ball detents are used to lock the bracket in various positions to adjust the bracket to the convenience of different users.

Description:
This is a conversion of Provisional application Ser. No. 60/123,076, filed Mar. 4,1999. 
    
    
     BACKGROUND OF THE INVENTION 
     This invention relates, in general, to arm chair brackets, and, in particular, to an adjustable arm chair bracket. 
     DESCRIPTION OF THE PRIOR ART 
     In the prior art various types of arm chair brackets have been proposed. For example, U.S. Pat. No. 5,839,786 to Cvek discloses an arm rest which is rotatably attached to an arm of a chair, and the arm rest can be pivoted to a plurality of locations. 
     U.S. Pat. No. 5,484,187 to Doerner et al discloses a three part bracket which allow a rotatable arm rest to be attached to a chair arm. 
     U.S. Pat. No. 5,641,203 to Van De Riet et al discloses an adjustable arm rest assembly pivotably attached to an arm rest of a chair and which has detents to lock the assembly in a plurality of positions. 
     U.S. Pat. No. 5,407,249 to Bonutti discloses a pivotably mounted arm rest which can be locked in a plurality of positions. 
     U.S. Pat. No. 5,380,065 to Rohrer discloses a three part bracket which allows an arm rest to be pivotably mounted on a chair arm. 
     SUMMARY OF THE INVENTION 
     The present invention is directed to an adjustable arm chair bracket which will attach a chair arm rest to a chair. The arm rest can then be adjusted to suit individuals of different sizes. The bracket has three arms, one of which is connected to the chair, the second has the arm rest attached thereto, and the third arm connects the first and second arm. Spring biased ball detents are used to lock the bracket in various positions to adjust the bracket to the convenience of different users. 
     It is an object of the present invention to provide a new and improved adjustable arm rest bracket for a chair. 
     It is an object of the present invention to provide a new and improved adjustable arm rest bracket that can be easily adjusted to the convenience of different users. 
     It is an object of the present invention to provide a new and improved adjustable arm rest bracket that can be attached to a variety of chairs. 
     These and other objects and advantages of the present invention will be fully apparent from the following description, when taken in connection with the annexed drawings. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     FIG. 1 is perspective view of the present invention attached to the arm rest of a chair. 
     FIG. 2 is a partial side view of the adjustable locking mechanism of the present invention. 
     FIG. 3 is a side view of the adjustable bracket of the present invention. 
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENT 
     Referring now to the drawings in greater detail, FIG. 1 shows the present invention  1  attached to a chair with a back rest  3  and a seat portion  2 . The adjustable bracket of the present invention is attached to a vertical arm rest support  4  secured to the chair seat  2  in any conventional manner such as, but not limited to, screws or bolts. 
     The bracket of the present invention comprises at least two arms, although three arms  5 ,  6 ,  7  (shown in FIGS. 1 and 3) are preferred, which can be made from any suitable material with solid machined aluminum being the preferred material. The arm  5  is attached to the top of the vertical arm rest support  4  in any conventional manner such as by screws or bolts. The arm  5  is secured to the arm  6  by means of a pivot pin as shown in FIG.  2 . 
     The pivot pin comprises three sections  9 ,  10 ,  15 . The top section  9  will overlie the top of the arm  6 , as shown in FIG. 3, to prevent the arm from being detached. The middle section  10  of the pivot pin will fit within a recess or aperture  16  shown in dotted lines in FIG.  3 . The bottom section  15  will be rotatably secured to the arm  5  in any conventional manner so it can rotate 360° with respect to the arm  5 . 
     As more clearly shown in FIG. 2, the center section  10  of the pivot pin has a plurality of recesses  11  spaced around the periphery of this center section  10 . There are  24  recesses  11  spaced at 15° around center section  10 , although the number of recesses and the spacing of the recesses can be varied without departing from the scope of the invention. Secured within an adjacent recess in the arm  6  is a locking means which will cooperate with the spaced recesses  11  to hold the arms  5 ,  6  in any relative position with respect to each other. 
     The recess in the arm  6  contains a holder  13  which houses a spring  14 . The spring  14  biases a ball  12  toward the center pivot pin section  10 . When the ball  12  aligns with one of the recesses  11 , the ball will be biased into the recess by the spring  14 , and this will lock the relative positions of the two arms  5 ,  6 . Therefore, the user can adjust the relative position of the bracket arms  5 ,  6  to a position that is most comfortable to the user, and once the user has the bracket arms  5 ,  6  is the preferred position, the ball detent  12  cooperating with the recesses  11  will hold the bracket arms  5 ,  6  in this position. 
     Therefore, by merely rotating arm  5  with respect to arm  6 , different users can adjust the entire arm rest on the chair to a position that is comfortable to them. In addition, the same user can easily adjust the arm rest, at different times of the day as fatigue sets in. In this way a user can adjust the arm rest easily and conveniently during the day to avoid fatigue, which leads to poor work habits and errors. Because the arms are extremely easy to adjust (there are no locking pins or adjustment screws to manipulate to adjust the arm rest) a user is more likely to adjust the arm rest bracket as the need arises, and therefore, avoid a poorly adjusted arm rest. 
     A third arm  7  is attached to the arm  6  in the same manner as the arm  6  is attached to the arm  5  (i.e. by means of a pivot pin as shown in FIG.  2 ). The arm  7  can be adjusted with respect to the arm  6  in the same easy, convenient manner as described above with respect to the adjustment between the arms  5 ,  6 . The addition of the third arm  7  offers the user greater versatility with respect to the position that the arm rest is placed into, and this translates into a chair which will be more comfortable to use, whether it is being used by a single person or more a plurality of persons. Again, this ease in adjusting the arm rest means that a person will avoid fatigue (which results in mistakes and errors) and that different people can use the same chair and easily adjust the chair to their individual requirements. 
     As shown in FIGS. 1 and 3, a polyurethane arm pad  8  can be attached to the arm bracket  7  in any conventional manner such as by bolts  17  which thread into recesses  18  in the underside of the pad  8 . Since this is a conventional attachment means for an arm rest pad no further description is necessary. Also, the type of material that the pad  8  is made from can be varied without departing from the scope of the invention. 
     It should be noted that while the present invention has been described with three arm brackets  5 ,  6 ,  7 , it should be noted that it could use two arm brackets or more than three, however, three arm brackets are the preferred number to offer the user the proper amount of versatility in positioning the arm rest in the comfortable fashion. 
     Although the Adjustoyou Arm Chair Bracket and the method of using the same according to the present invention has been described in the foregoing specification with considerable details, it is to be understood that modifications may be made to the invention which do not exceed the scope of the appended claims and modified forms of the present invention done by others skilled in the art to which the invention pertains will be considered infringements of this invention when those modified forms fall within the claimed scope of this invention.