IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0235596
(2005-09-26)
|
등록번호 |
US-8348028
(2013-01-08)
|
우선권정보 |
DE-103 13 659 (2003-03-26) |
발명자
/ 주소 |
- Zimmer, Günther
- Zimmer, Martin
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
3 인용 특허 :
23 |
초록
▼
In a pneumatic damper for slowing down movable furniture parts, comprising a cylinder and a piston movably disposed in the cylinder so as to form a displacement chamber at one side and a vacuum chamber at the other side of the piston, the piston includes a seal element which, in one end position the
In a pneumatic damper for slowing down movable furniture parts, comprising a cylinder and a piston movably disposed in the cylinder so as to form a displacement chamber at one side and a vacuum chamber at the other side of the piston, the piston includes a seal element which, in one end position thereof, is in close contact with the wall of the cylinder whose cross-section increases toward the opposite end of the cylinder so that the sealing effect collapses when the piston approaches its other end position and the piston includes a piston rod, which has a diameter of less than 35% of the piston diameter and sealingly extends through a cylinder end wall.
대표청구항
▼
1. A pneumatic damper for slowing down movable furniture parts, comprising a cylinder (11, 81) with a cylinder wall (12), a piston (30) movably supported, and axially guided, in said cylinder (11, 81) and including a piston rod (70, 85) having a diameter of less than 35% of the diameter of said pist
1. A pneumatic damper for slowing down movable furniture parts, comprising a cylinder (11, 81) with a cylinder wall (12), a piston (30) movably supported, and axially guided, in said cylinder (11, 81) and including a piston rod (70, 85) having a diameter of less than 35% of the diameter of said piston (30) and extending from one end of said cylinder (11, 81) through a guide opening (18), in which said piston rod (70, 85) is sealingly supported, said piston (30) having a rest position at said one end of said cylinder and dividing said cylinder (11, 81) into a vacuum chamber (16) at the side of the piston adjacent said one end of the cylinder (11, 81) and a displacement chamber (15) at the opposite side of the piston (30), said piston (30) being void of any throttling passages and including circumferential sealing and elastic sleeve elements (50, 60), which are in contact with the cylinder wall (12) in said rest position of the piston (30) such that the vacuum chamber (16) and the displacement chamber (15) are sealed from each other, said sealing and elastic sleeve elements (50, 60) permitting pneumatic fluid flow only from the vacuum chamber (16) at one side of the piston (30) to the displacement chamber (15) at the other side of the piston (30) when the piston (30) is moved back to its rest position, and said sealing and elastic sleeve elements (50, 60) including an elastic sleeve (60), whose interior is in communication with said displacement chamber (15) for biasing said elastic sleeve (60) into contact with the cylinder wall (12) for generating friction forces retarding the movement of the piston (30) while the fluid in the displacement chamber (15) is under pressure, said cylinder (11, 81) having a diameter which increases from the rest position of said piston (30) in which said sealing elements (50, 60) are in contact with the cylinder wall (12) toward the opposite end thereof, so that a vacuum is rapidly generated in the vacuum chamber (16) at said one side of the piston as said piston is moved out of its rest position while the fluid in said displacement chamber (15) is compressed, but pressurized fluid is released from the displacement chamber (15) as the piston approaches the end of the displacement chamber (15) opposite the rest position of the piston (30) where the cylinder (11, 81) has an increased diameter so that the piston sealing and elastic sleeve elements (50, 60) are no longer in sealing contact with the cylinder wall. 2. A pneumatic damper according to claim 1, wherein at least one of said piston (30) and said cylinder wall (12) includes means permitting a leakage flow between the displacement chamber (15) and the vacuum chamber (16) past the piston (30). 3. A pneumatic damper according to claim 1, wherein the elastic sleeve element (60) of said piston (30) which is in contact with said cylinder wall (12) is longer than ½ of the outer diameter of the piston (30). 4. A pneumatic damper according to claim 1, wherein the diameter of the cylinder chambers (15, 16) differ by not more than 5%. 5. A pneumatic damper according to claim 1, wherein the pressure chamber (15) and the vacuum chamber (16) are in communication with each other via a throttling groove (22) formed in the cylinder wall (12) when the piston (30, 83) reaches the throttling groove (22). 6. A pneumatic damper according to claim 1, wherein the surfaces the piston seal element which are in contact with the cylinder wall (12) include compounds which are different from the seal material and which are one of chemically bonded to, and physically deposited in, the seal material. 7. A pneumatic damper according to claim 6, wherein said compounds are halogens. 8. A pneumatic damper according to claim 1, wherein the displacement chamber (15) is disposed in the area of the cylinder (11, 81) remote from the piston rod (70, 85). 9. A pneumatic damper according to claim 7, wherein the seal elements (50, 60, 75) consist of nitrile-butadien rubber with the whole surface thereof being provided with halogens chemically bonded thereto. 10. A pneumatic damper according to claim 1, wherein the piston seal element (60) is provided at its outer circumference with at least one longitudinal groove (67).
※ AI-Helper는 부적절한 답변을 할 수 있습니다.