US2005252252A1PendingUtilityA1

Drum for washing machine

48
Assignee: LG ELECTRONICS INCPriority: May 15, 2004Filed: Feb 3, 2005Published: Nov 17, 2005
Est. expiryMay 15, 2024(expired)· nominal 20-yr term from priority
Inventors:Deug Hee LeeSeung Bong ChoiYoung Jong Kim
D06F 37/04
48
PatentIndex Score
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Cited by
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References
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Claims

Abstract

Disclosed is a drum for a washing machine having improved strength. The drum for a washing machine includes a center comprising a cylindrical body, a back coupled to a back portion of the center, a front coupled to a front portion of the center and having an opening, a recess formed at the back and configured to accommodate a spider connected to a driving shaft, and at least one bent portion formed at the back and projecting backwardly.

Claims

exact text as granted — not AI-modified
1 . A drum for a washing machine comprising: 
 a center comprising a cylindrical body;    a back coupled to a back portion of the center;    a front coupled to a front portion of the center and having an opening;    a recess formed at the back and configured to accommodate a spider connected to a driving shaft; and    at least one bent portion formed at the back and projecting backwardly.    
   
   
       2 . The drum according  claim 1 , wherein the recess is configured to increase a friction surface against a laundry in the drum.  
   
   
       3 . The drum according  claim 1 , wherein the recess projects forwardly from the back.  
   
   
       4 . The drum according  claim 1 , wherein the recess is formed by pressing the back.  
   
   
       5 . The drum according  claim 1 , wherein the recess has the same shaped as the spider.  
   
   
       6 . The drum according  claim 1 , wherein the recess accommodates arms of the spider.  
   
   
       7 . The drum according  claim 1 , wherein the bent portion is configured to a friction surface against a laundry in the drum.  
   
   
       8 . The drum according  claim 1 , wherein the bent portion is formed within the recess.  
   
   
       9 . The drum according  claim 1 , wherein the bent portion is formed by pressing the back.  
   
   
       10 . The drum according  claim 1 , wherein the bent portion comprises inclined portions which are inclined opposite to each other and disposed continuously in a radial direction of the back.  
   
   
       11 . The drum according  claim 1 , wherein the bent portion has a triangular section.  
   
   
       12 . The drum according  claim 1 , wherein the bent portion has a peak.  
   
   
       13 . The drum according  claim 1 , wherein an edge of the back is curled to be coupled with the center.  
   
   
       14 . The drum according  claim 1 , wherein a diameter of the opening is 0.65-0.75 times of a diameter of the front.  
   
   
       15 . The drum according  claim 1 , wherein a bent portion is formed in a circumferential direction between the opening and an edge of the front  
   
   
       16 . The drum according  claim 15 , wherein a distance between the bent portion and the opening is shorter than a distance between the bent portion and an edge of the front.  
   
   
       17 . The drum according to  claim 15 , wherein a distance from the edge of the front to the bent portion is ⅔ of a distance from the edge of the front to the opening.  
   
   
       18 . The drum according to  claim 15 , wherein a distance from the edge of the front to the bent portion is ½ of a distance from the edge of the front to the opening.  
   
   
       19 . The drum according to  claim 1 , the front comprises: 
 a first extension formed at an edge of the front;    a second extension extending from the first extension toward a center of the front and bent forwardly to be inclined; and    a third extension extending from the second extension toward the center of the front.    
   
   
       20 . The drum according to  claim 19 , wherein the third extension is smaller than the first extension.  
   
   
       21 . The drum according to  claim 19 , wherein a distance from an outer circumference of the first extension to an outer circumference of the third extension is ⅔ of a distance from the outer circumference of the first extension to an inner circumference of the third extension.  
   
   
       22 . The drum according to  claim 19 , wherein a distance from an outer circumference of the first extension to an outer circumference of the third extension is ½ of a distance from the outer circumference of the first extension to an inner circumference of the third extension.  
   
   
       23 . The drum according to  claim 19 , wherein the front further comprises a fourth extension extending forwardly from the third extension and defining an entrance for the opening.  
   
   
       24 . The drum according to  claim 23 , wherein an edge of the fourth extension is curled.  
   
   
       25 . The drum according to  claim 1 , wherein an edge of the front is curled to be coupled with the center.  
   
   
       26 . The drum according to  claim 19 , wherein the second extension has a predetermined curvature.  
   
   
       27 . A drum for a washing machine comprising: 
 a center comprising a cylindrical body;    a back coupled to a back portion of the center;    a front coupled to a front portion of the center and having an opening;    a bent portion formed in a circumferential direction between the opening and an edge of the front, wherein a distance between the bent portion and the opening is shorter than a distance between the bent portion and an edge of the front.    
   
   
       28 . The drum according to  claim 27 , wherein a distance from the edge of the front to the bent portion is ⅔ of a distance from the edge of the front to the opening.  
   
   
       29 . The drum according to  claim 27 , wherein a distance from the edge of the front to the bent portion is ½ of a distance from the edge of the front to the opening.  
   
   
       30 . The drum according to  claim 27 , the front comprises: 
 a first extension formed at an edge of the front;    a second extension extending from the first extension toward a center of the front and bent forwardly to be inclined; and    a third extension extending from the second extension toward the center of the front.    
   
   
       31 . The drum according to  claim 30 , wherein the third extension is smaller that the first extension.  
   
   
       32 . The drum according to  claim 30 , wherein a distance from an outer circumference of the first extension to an outer circumference of the third extension is ⅔ of a distance from the outer circumference of the first extension to an inner circumference of the third extension.  
   
   
       33 . The drum according to  claim 30 , wherein a distance from an outer circumference of the first extension to an outer circumference of the third extension is ½ of a distance from the outer circumference of the first extension to an inner circumference of the third extension.  
   
   
       34 . The drum according to  claim 30 , wherein the front further comprises a fourth extension extending forwardly from the third extension and defining an entrance for the opening.  
   
   
       35 . The drum according to  claim 34 , wherein an edge of the fourth extension is curled.  
   
   
       36 . The drum according to  claim 27 , wherein an edge of the front is curled to be coupled with the center.  
   
   
       37 . The drum according to  claim 30 , wherein the second extension has a predetermined curvature.  
   
   
       38 . The drum according to  claim 27 , wherein a diameter of the opening is 0.65-0.75 times of a diameter of the front.

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