Retaining device for hanger frame

Abstract

A retainer for a hanger frame includes an outer sleeve and an inner sleeve mounted in the outer sleeve. The outer sleeve has an inner diameter that gradually decreases from an intermediate portion thereof toward two ends thereof. The inner sleeve includes a plurality of sleeve pieces. An outer curvature of the inner sleeve corresponds to an inner curvature of an inner circumference of the outer sleeve. Inner ridges and outer ridges are respectively formed on an inner surface and an outer surface of each sleeve piece. Each outer ridge of each sleeve piece is in contact with the inner circumference of the outer sleeve. When a post is extended through the inner sleeve, each outer ridge of each sleeve piece presses against the inner circumference of the outer sleeve, and each inner ridge of each sleeve piece presses against the post.

1 . A retainer for a hanger frame, the retainer comprising: 
 an outer sleeve comprising a longitudinal hole adapted to be extended through by a post of a hanger frame, the longitudinal hole having an inner diameter that gradually decreases from an intermediate portion of the outer sleeve toward two ends of the outer sleeve; and    an inner sleeve mounted in the outer sleeve, the inner sleeve comprising a plurality of sleeve pieces, the inner sleeve including an outer curvature corresponding to an inner curvature of an inner circumference of the longitudinal hole of the outer sleeve, the inner sleeve further including a longitudinal hole adapted to be extended through by the post, each said sleeve piece including an inner surface and an outer surface, a plurality of ridges being formed on each of the inner surface and the outer surface of each said sleeve piece, each said ridge on the outer surface of each said sleeve piece being in contact with the inner circumference of the outer sleeve;    wherein when the post is extended through the longitudinal hole of the inner sleeve, each said ridge on the outer surface of each said sleeve piece presses against the inner circumference of the outer sleeve, and each said ridge on the inner surface of each said sleeve piece presses against an outer circumference of the post.    
   
   
       2 . The retainer as claimed in  claim 1 , wherein the outer sleeve has a section substantially the same as that of a barrel.  
   
   
       3 . The retainer as claimed in  claim 1 , wherein the outer sleeve comprises an inner flange on a lower end thereof, and wherein the inner sleeve comprises a lower end resting on the inner flange.  
   
   
       4 . The retainer as claimed in  claim 1 , wherein one of the ridges on the outer surface of each said sleeve piece adjacent to a central portion of said sleeve piece has a radial length greater than that of another of the ridges on the outer surface of said sleeve piece distal to the central portion of said sleeve piece.  
   
   
       5 . The retainer as claimed in  claim 1 , wherein the inner sleeve has a section substantially the same as that of a barrel.  
   
   
       6 . The retainer as claimed in  claim 1 , wherein the inner surface of each said sleeve piece is wavy.  
   
   
       7 . The retainer as claimed in  claim 1 , wherein the outer surface of each said sleeve piece is wavy.  
   
   
       8 . The retainer as claimed in  claim 1 , wherein each said ridge on the inner surface of each said sleeve piece extends along a circumferential direction.  
   
   
       9 . The retainer as claimed in  claim 1 , wherein each said ridge on the outer surface of each said sleeve piece extends along a circumferential direction.  
   
   
       10 . The retainer as claimed in  claim 8 , wherein each said ridge on the outer surface of each said sleeve piece extends along a circumferential direction.  
   
   
       11 . The retainer as claimed in  claim 1 , wherein the retainer further comprises a radial hole for coupling with an end of a hanger rod, the inner sleeve comprising a chamfered face facing the radial hole and not in contact with the end of the hanger rod.