Caster wheel with parabolic tread-hub interface
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B60B-033/00
B60B-027/00
B60B-027/02
B60B-003/00
출원번호
US-0470101
(2014-08-27)
등록번호
US-9056524
(2015-06-16)
발명자
/ 주소
Lee, Elmer
출원인 / 주소
Caster Concepts, Inc.
대리인 / 주소
Endurance Law Group, PLC
인용정보
피인용 횟수 :
0인용 특허 :
10
초록▼
A caster wheel assembly includes at least one hub that has an annularly dished concave region disposed between a pair of cylindrical lips about its outer periphery. An elastomeric tread has a convex inner periphery that seats in the concave region of the hub. The interface between the hub and tread
A caster wheel assembly includes at least one hub that has an annularly dished concave region disposed between a pair of cylindrical lips about its outer periphery. An elastomeric tread has a convex inner periphery that seats in the concave region of the hub. The interface between the hub and tread is parabolic in cross-section to manage load-inducted stresses in the tread. The parabolic cross-section is defined by the equation y=A*x2, where A is between 1.5 and 4. A cylindrical lip/pad interface is established between hub and tread on opposite sides of the parabolic interface to accommodate high load situations. A bearing is supported in the hub, and a bushing inside the bearing. An axle shaft passing through the bushing attaches the hub and tread to a support bracket for use in a wide variety of industrial applications.
대표청구항▼
1. A multi-wheel caster wheel assembly comprising: at least two hubs, each said hub comprising a generally annular body centered about a common central axis, each said hub having an outer peripheral rim section and an inner bearing section, each said rim section including an annular outer rim surfac
1. A multi-wheel caster wheel assembly comprising: at least two hubs, each said hub comprising a generally annular body centered about a common central axis, each said hub having an outer peripheral rim section and an inner bearing section, each said rim section including an annular outer rim surface having an annularly dished concave region disposed between a pair of cylindrical lips,at least two treads, each said tread surrounding a respective one of said rim surfaces, each said tread having a convex inner periphery conforming to said annularly dished concave region of said rim surface in a tight nested relationship, each said tread including a cylindrical pad on each side of said convex inner periphery, said cylindrical pads disposed in direct surface-to-surface contact with said cylindrical lips of a respective one of said rim surfaces,wherein said annularly dished concave region of each said outer rim surface has a parabolic OD cross-section,wherein said parabolic OD cross-section is defined by the equation y=A*x2, where A is between 1.5 and 4, andfurther including a bearing disposed inside said inner bearing section of each said hub, and a bushing having a cylindrical outer surface disposed inside each said bearing. 2. The assembly of claim 1 wherein said parabolic OD cross-section is defined by the equation y=A*x2, where A is about 3.6. 3. The assembly of claim 1 wherein each said tread is fabricated from a resilient elastomeric material. 4. The assembly of claim 3 wherein each said tread includes an outermost rolling surface, said outermost rolling surface being convexly rounded. 5. The assembly of claim 1 further including an annular spacer disposed between each of said bearings and about said cylindrical outer surface of said bushing. 6. The assembly of claim 5 wherein said bushing comprises a split bushing having interlocking male and female top hat sections, said male top hat section operatively associated with one of said bearings and said female top hat section operatively associated with the other of said bearings. 7. A caster wheel assembly comprising: a hub comprising a generally annular body centered about a central axis, said hub having an outer peripheral rim section and an inner bearing section, said rim section including an annular outer rim surface having an annularly dished concave region disposed between a pair of cylindrical lips,a tread surrounding said rim surface, said tread having a convex inner periphery conforming to said annularly dished concave region of said rim surface in a tight nested relationship, said tread including a cylindrical pad on each side of said convex inner periphery, said cylindrical pads disposed in direct surface-to-surface contact with said cylindrical lips of said rim surface,wherein said annularly dished concave region of said outer rim surface has a parabolic OD cross-section,wherein said parabolic OD cross-section is defined by the equation y=A*x2, where A is between 1.5 and 4, andwherein said bearing section includes an inner bearing seat defined by a counter-bore. 8. The assembly of claim 7 wherein said parabolic OD cross-section is defined by the equation y=A*x2, where A is about 3.6. 9. The assembly of claim 7 wherein said tread is fabricated from a resilient elastomeric material. 10. The assembly of claim 9 wherein said tread includes an outermost rolling surface, said outermost rolling surface being convexly rounded. 11. The assembly of claim 7 wherein said rim section and said bearing section have generally equal axial widths. 12. The assembly of claim 11 wherein said hub further includes an annular web section disposed between said rim section and said bearing section, said web section having an axial width less than the axial widths of said rim section and said bearing section. 13. The assembly of claim 7 further including a bearing disposed inside said counter-bore of said hub. 14. The assembly of claim 13 wherein said bearing comprises a roller bearing having a plurality of roller elements trapped between inner and outer races. 15. The assembly of claim 13 further including a bushing having a cylindrical outer surface disposed inside said bearing, said bushing having a central through-hole extending along said central axis, an axle shaft disposed in said through hole.
연구과제 타임라인
LOADING...
LOADING...
LOADING...
LOADING...
LOADING...
이 특허에 인용된 특허 (10)
Timmer Hendrikus Jacobus Maria (Tiel NL), Castor wheel.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.