IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0911015
(2004-08-04)
|
발명자
/ 주소 |
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출원인 / 주소 |
|
대리인 / 주소 |
Vedder Price Kaufman &
|
인용정보 |
피인용 횟수 :
51 인용 특허 :
71 |
초록
▼
An elastomeric bearing having inner and outer races and a core. The core has a plurality of resilient laminae and a plurality of non-resilient laminae interleaved with one another. Each of the lamina has an axially inner cylindrical portion of a given diameter, an axially outer cylindrical portion
An elastomeric bearing having inner and outer races and a core. The core has a plurality of resilient laminae and a plurality of non-resilient laminae interleaved with one another. Each of the lamina has an axially inner cylindrical portion of a given diameter, an axially outer cylindrical portion of a greater diameter than the given diameter and, lying between the inner and outer laminae, an angled portion joining the axially inner and outer laminae to each other. The laminae are continuous and of one piece. In this way, the elastomeric bearing has comparatively small resistance to torsional movement, but great resistance to both radial and axial movement.
대표청구항
▼
The invention claimed is: 1. An elastomeric bearing comprising, in combination, an outer cylindrical race, an inner race coaxial with said outer race, and a movement axis parallel to said inner and outer races, said elastomeric bearing further including a core portion disposed between said outer an
The invention claimed is: 1. An elastomeric bearing comprising, in combination, an outer cylindrical race, an inner race coaxial with said outer race, and a movement axis parallel to said inner and outer races, said elastomeric bearing further including a core portion disposed between said outer and inner races, said core portion having a plurality of resilient laminae and a plurality of non-resilient laminae, said resilient and non-resilient laminae being interleaved with one another, each of said lamina having an axially inner cylindrical portion of a given diameter, an axially outer cylindrical portion of a greater diameter than said given diameter and, lying between said axially inner and said axially outer laminae, an angled portion joining said given diameter laminae to said greater diameter laminae, each of said laminae having a continuous cross section around the entire said given diameter and said greater diameter and of one piece, whereby said elastomeric bearing has comparatively small resistance to torsional movement and great resistance to both radial and axial movement. 2. An elastomeric bearing as defined in claim 1 wherein said resilient laminae comprise an elastomeric material. 3. An elastomeric bearing as defined in claim 1 wherein said resilient laminae comprise a natural rubber. 4. An elastomeric bearing as defined in claim 1 wherein said resilient laminae comprise a blend of polybutadiene and natural rubber. 5. An elastomeric bearing as defined in claim 1 wherein said resilient laminae include at least one elastomer from the class of elastomers consisting of natural rubber, polybutadiene, EPDM, nitrile, Neoprene, butyl, silicone and mixtures thereof. 6. An elastomeric bearing as defined in claim 1 wherein said non-resilient laminae comprise a metal material. 7. An elastomeric bearing as defined in claim 1 wherein said non-resilient laminae comprise a steel material. 8. An elastomeric bearing as defined in claim 1 wherein said non-resilient laminae comprise a stainless steel material. 9. An elastomeric bearing as defined in claim 1 wherein said angled portion comprises an angle of between about 10째 and about 50째. 10. An elastomeric bearing as defined in claim 1 wherein said angled portion comprises an angle of about 35째 to about 50째. 11. An elastomeric bearing as defined in claim 1 wherein said angled portion comprises an angle of about 10째 to about 20째. 12. An elastomeric bearing as defined in claim 1 wherein said core portion includes at least eleven resilient and ten non-resilient laminae. 13. In a rotary wing aircraft having a plurality of blades, each blade being mounted on one leg of a rotatable yoke, each of said yoke legs having a pair of spaced apart, opposed cylindrical bearing retainers forming a portion of an outside leg of said yoke, each of said blades being secured for at least flap movement about a flap axis defined by said bearing retainers, said aircraft including at least one elastomeric bearing, including an outer race and an inner race, said outer race of said bearing being affixed to one of said bearing retainers, and said inner race being secured to a shaft defining said flap axis, said elastomeric bearing further including a core portion between said inner and outer races, said core portion comprising a plurality of resilient laminae and a plurality of non-resilient laminae, said resilient and non-resilient laminae being interleaved with one another, each of said laminae having an axially inner cylindrical portion of a given diameter, an axially outer cylindrical portion of a greater diameter than said given diameter and, lying between said inner and outer laminae, angled portions joining said given diameter laminae to said greater diameter laminae, each of said laminae being continuous cross section around the entire said given diameter and said greater diameter and of one piece, whereby said elastomeric bearings have comparatively small resistance to flap movement of said blade and great resistance to both radial and axial movement of said blade. 14. A combination as defined in claim 13 wherein said at least one elastomeric bearing comprises two elastomeric bearings, each one received within said bearing retainer. 15. A vehicle suspension system including a vehicle frame, at least one outer race of an elastomeric bearing fixedly secured to said frame, an inner race of said bearing affixed to a swing arm mounting an axle, and a core portion of said elastomeric bearing comprising a plurality of resilient laminae and a plurality of non-resilient laminae, said laminae being interleaved with one another, each of said laminae having an axially inner cylindrical portion of a given diameter, an axially outer cylindrical portion of a greater diameter than said given diameter and, lying between said inner and outer laminae, an angled portion joining said given diameter laminae to said greater diameter laminae, each of said laminae being continuous cross section around the entire said given diameter and said greater diameter and of one piece, whereby said elastomeric bearing has comparatively small resistance to rotary movement of said swing arm and great resistance to both radial and axial movement of said swing arm. 16. A vehicle suspension system as defined in claim 15 which includes at least two swing arms and two elastomeric bearings.
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