Buffer for Noise Removal of Closing the Door

• US 20070251052A1
• Filed: 11/29/2005
• Published: 11/01/2007
• Est. Priority Date: 12/02/2004
• Status: Abandoned Application

• Current Assignee: Samsung Precision Ind. Co., Ltd
• Original Assignee: Samsung Precision Ind. Co., Ltd
• Inventors: Pyo, Chul
• Application Number:
  US11/578,200
• Publication Number:
  US 20070251052A1
• Time in Patent Office: Days
• US Class Current: 16/86.A
• CPC Class Codes: E05F 5/02 specially for preventing the slamming of swinging wings during final closing movement, e.g. jamb stops
• CPC Class Codes: E05F 5/10 with piston brakes
• CPC Class Codes: E05Y 2201/21 Brakes
• CPC Class Codes: E05Y 2201/256 with pistons or vanes
• CPC Class Codes: E05Y 2201/264 linear
• CPC Class Codes: E05Y 2900/20 for furniture, e.g. cabinets

Abstract

There is provided a hydraulic damper installed to furniture, such as a sink or wardrobe, for buffering a door. In a buffer for absorbing shock created when a furniture door is closed, the buffer including a cylinder 10 having a cylinder chamber, and a piston 30 inserted in the cylinder chamber, supported by a rod 70 penetrating a packing 60 and a sealing housing 65, and urged by a first resilient spring 40 built in the housing, the buffer includes a pressing bracket 50, mounted to an end of the rod 70, for moving oil in the piston; an oil flow blocking housing 45 mounted to a boss 52 forming an end of the pressing bracket 50 and connected to the first resilient spring 40; and a second resilient spring 55, interposed between the oil flow blocking housing 45 and the pressing bracket 50, for providing the oil flow blocking housing 45 with a return force. Since the hydraulic damper with dual oil passages formed is installed at the closing/opening route of the furniture door, it can minimize a noise generated when the door is closed, regardless of specifications or weight of the door, thereby providing a silent indoor circumstance, regardless of specifications or weight of the door. Further, the door can be smoothly opened or closed, thereby prolonging a life of the hydraulic damper.

Claims

1. A buffer for absorbing shock created when a furniture door is closed, the buffer including a cylinder 10 having a cylinder chamber, and a piston 30 inserted in the cylinder chamber, supported by a rod 70 penetrating a packing 60 and a sealing housing 65, and urged by a first resilient spring 40 built in the housing, comprising:

a pressing bracket 50, mounted to an end of the rod 70, for moving oil in the piston;

an oil flow blocking housing 45 mounted to a boss 52 forming an end of the pressing bracket 50 and connected to the first resilient spring 40; and

a second resilient spring 55, interposed between the oil flow blocking housing 45 and the pressing bracket 50, for providing the oil flow blocking housing 45 with a return force.

2. The buffer as claimed in claim 1, wherein the oil flow blocking housing 45 has a storage space 45b for receiving one end of the first resilient spring 40, and the storage space 45b is provided on a periphery surface thereof with a curtain portion 45a expanded/retracted by external shock to contact or detach from an inner wall of the piston 30.

3. The buffer as claimed in claim 1, wherein the pressing bracket 50 is integrally formed with bosses 52, on which the oil flow blocking housing 45 is slidably mounted, and a cap 53, an oil passing space 52a is formed between the bosses 52, and the cap 53 is formed with oil flow ports 53a communicating with the oil passing space 52a and an engaging groove 53b to which the rod 70 is engaged.