Damping device

• US 6,957,807 B2
• Filed: 12/22/2003
• Issued: 10/25/2005
• Est. Priority Date: 12/24/2002
• Status: Expired due to Fees

• Current Assignee: Grass GmbH (Thyssenkrupp AG)
• Original Assignee: Grass GmbH (Thyssenkrupp AG)
• Inventors: Ahlfeld, Juergen, Thallner, Rainer, Mueller, Wolfgang, Zimmer, Martin
• Primary Examiner(s): Butler, Douglas C.
• Application Number:
  US10/743,359
• Publication Number:
  US 20040150143A1
• Time in Patent Office: 673 Days
• Field of Search: 16 66- 70, 16/84, 16/82, 16/85, 16/86, 16/49, 267 6411- 6428, 267/226, 267/34, 267/124, 267139-140, 267/120, 267/116, 267/113, 267/221, 188/283, 188/317, 188/312, 188/301, 188/286, 188/287, 188/316, 188/322.22, 312/333, 312/334.1, 312/319.1, 293/134, 213/220, 213/223
• US Class Current: 267/64.11
• 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 5/08 with springs
• CPC Class Codes: E05F 5/10 with piston brakes
• CPC Class Codes: E05Y 2201/21 Brakes
• CPC Class Codes: E05Y 2201/212 Buffers
• CPC Class Codes: E05Y 2201/256 with pistons or vanes
• CPC Class Codes: E05Y 2201/264 linear
• CPC Class Codes: E05Y 2800/22 of not identical elements of the same category, e.g. combinations of not identical springs
• CPC Class Codes: E05Y 2800/244 arranged in serial relationship
• CPC Class Codes: E05Y 2900/20 for furniture, e.g. cabinets
• CPC Class Codes: F16F 9/0209 Telescopic F16F9/04 takes precedence
• CPC Class Codes: F16F 9/26 with two cylinders in line and with the two pistons or plungers connected together

Abstract

The invention concerns a damping device for damping the kinetic energy of movable cabinet components, which has a first damping element with a first cylinder that has a first piston, which slides lengthwise in it, and at least one more (second) damping element with a second cylinder that has a second piston, which slides lengthwise in it. Both damping elements are located one behind the other in a serial arrangement and form an integral system. The invention is characterized by the fact that each of the two damping elements are each designed as pneumatic (air) dampers, and a compression chamber and an expansion chamber respectively contain variable volumes; whereby, the damping effects of the damping elements are affected by the guide canals, which control the air distribution and air flow within and between the compression chambers and/or expansion chambers.

Claims

1. Damping device for damping the kinetic energy of at least one movable cabinet component, comprising:

a first damping element with a first cylinder that has a first piston having a first piston rod, which slides lengthwise in the first cylinder, and while in an extended position, the first piston rod extends outward from the first cylinder;

at least one second damping element with a second cylinder that has a second piston having a second piston rod, which slides lengthwise in the second cylinder;

wherein the damping elements are located one behind the other in a serial arrangement and form an integral system;

each of the damping elements is designed as a pneumatic damper, and each one has a compression chamber and an expansion chamber that have variable volumes, said expansion chamber of the second damping element disposed entirely rearward of the compression chamber of the first damping element; and

each piston and piston rod has a guide conduit, which controls air distribution and air flow within and between at least one of the respective compression chambers, the respective expansion chambers, and the respective compression and expansion chambers, and which affects damping effects of the damping elements.

2. Damping device, according to claim 1, wherein each damping element has a seal between an outer circumference of the respective piston and an inner circumference of the corresponding cylinder.

3. Damping device, according to claim 2, wherein the first piston of the first damping element is operably connected to the second piston rod of the second damping element during a predetermined operating distance of the damping device.

4. Damping device, according to claim 3, wherein the expansion chamber of the second damping element is separated from the compression chamber of the first damping element by a partition.

5. Damping device, according to claim 4, wherein the second piston rod of the second piston projects through an opening in the partition into the compression chamber of the first damping element so that a front side of the second piston rod of the second piston is taken up into a respective recess of the first piston.

6. Damping device, according to claim 5, wherein a seal is provided between the second piston rod of the second piston and the opening in the partition.

7. Damping device, according to claim 6, wherein a spring is located in the second damping element in order to affect a resetting force on the damping elements.

8. Damping device, according to claim 7, wherein the expansion chamber of the second damping element is in communication with an external environment by an opening formed in the expansion chamber of the second damping element.

9. Damping device, according to claim 8, wherein the first piston rod of the first piston is guided through a cylinder cap into the external environment whereby, the expansion chamber of the first damping element is in communication with the external environment by a remaining gap between the cylinder cap and the first piston rod.

10. Damping device, according to claim 9, wherein the guide conduit of the first piston and first piston rod further comprises a bore-hole extending longitudinally through the first piston and first piston rod, by which the compression chamber of the first damping element is in communication with the external environment.

11. Damping device, according to claim 10, wherein the guide conduit of the second piston and second piston rod further comprises a bore-hole extending longitudinally through the second piston and second piston rod by which the compression chamber of the second damping element is in communication with the external environment.

12. Damping device, according to claim 11, wherein the guide conduits of the first and second pistons and piston rods are in communication with one another.

13. Damping device, according to claim 12, further comprising a leakage conduit formed in the recess of the first piston by which the compression chamber of the first damping element is in communication with the guide conduit of the first piston.