Piston-type door closer with adjustable closing speeds
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
E05F-003/00
E05F-005/10
출원번호
US-0289971
(1994-08-12)
발명자
/ 주소
Lan Mei-Shu (No. 1
Lane 63
Chien-Chih St.
East District Taichung TWX)
인용정보
피인용 횟수 :
12인용 특허 :
0
초록▼
A multi-stage door closer for automatically closing a door after the door is opened; it contains a cylinder having three sections each with a different diameter. The middle section has the largest diameter. A pair of speed adjusting mechanisms are provided which are sleeved about a piston rod placed
A multi-stage door closer for automatically closing a door after the door is opened; it contains a cylinder having three sections each with a different diameter. The middle section has the largest diameter. A pair of speed adjusting mechanisms are provided which are sleeved about a piston rod placed inside the cylinder. Each of the speed adjusting mechanism contains a rotatable piston head, which will rotate with the cylinder, and a fixed piston head, which will not rotate with the cylinder. By cooperated actions among the variously-sized sections of the cylinder and the pair of speed adjusting mechanisms, each speed adjusting mechanism can be separately adjusted to control the door closing speed at various stages of the door closing action. For example, the door closer can be designed such that the first speed adjusting mechanism is made to control the door closing speed during the first 10°; whereas, the second speed adjusting mechanism is made to control the door closing speed after the first 10°. Other arrangements are possible and can be easily designed.
대표청구항▼
A door closer to be affixed to a door or door frame for closing said door after said door is opened, said door closer comprising: (a) a housing body and a cylinder inside said housing body, said cylinder having first and second cylinder ends, and first, second, and third sections, each of said secti
A door closer to be affixed to a door or door frame for closing said door after said door is opened, said door closer comprising: (a) a housing body and a cylinder inside said housing body, said cylinder having first and second cylinder ends, and first, second, and third sections, each of said sections of said cylinder having a different predetermined diameter, said cylinder being sealed at both ends thereof so as to contain a compressed fluid; (b) a piston rod penetrating through said first end of said cylinder and being in a sealed but movable relationship therewith, said piston rod being connected to a link via a connecting rod outside of said cylinder, said link being pivotably affixed to said housing body; (c) turning means sealingly provided at said second end of said cylinder for turning said cylinder; (d) first and second speed adjusting mechanisms sleeved on said piston rod, said first speed adjusting mechanism comprising a first rotatable piston head and a first fixed piston head, and said second speed adjusting mechanism comprising a second rotatable piston head and a second fixed piston head, said first rotatable piston head being constructed so as to be in a sealingly frictional contact with said first section of said cylinder via a first O-ring, and said second rotatable piston head being constructed so as to be in a sealingly frictional contact with said third section of said cylinder via a second O-ring; (e) said first rotatable piston head having first radially extending groove and first axial passage, both of which being in communication therebetween, and said first fixed piston head having a first spirally shaped recess for receiving a first spirally shaped washer, said first spirally shaped washer being disposed between said first rotatable piston head and said first fixed piston head, said first spirally shaped washer having a thickness greater than a depth of said first spirally shaped recess so as to provide a first spirally shaped protrusion covering at least a portion of said first radially extending groove; (f) said second rotatable piston head having second groove and second axial passage, both of which being in communication therebetween, and said second fixed piston head having a second spirally shaped recess for receiving a second spirally shaped washer, said second spirally shaped washer being disposed between said second rotatable piston head and said second fixed piston head, said second spirally shaped washer having a thickness greater than a depth of said second spirally shaped recess so as to provide a second spirally shaped protrusion covering at least a portion of said second radially extending groove; and (g) wherein said cylinder and said first and second speed adjusting mechanisms are so structured such that only said first rotatable piston head is in a sealingly frictional contact with said first section of said cylinder when said door is opened for no greater than a predetermined angle, and only said second rotatable piston head is in a sealingly frictional contact with said third section of said cylinder when said door is opened for greater than said predetermined angle; (h) whereby a turning of said turning meaning causing said cylinder to turn, which, in turn, causing either said first rotatable piston head or said second rotatable piston head to turn, thus changing portions of said first radially extending groove or said second radially extending groove covered by said first or second spirally shaped protrusion, so as to control flow rate of said compressed fluid through said first or second radially extending groove.
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이 특허를 인용한 특허 (12)
Salice, Luciano, Apparatus for the damping of impacts, preferably the impacts of furniture doors or drawers.
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