Trapezium power transmission belt |
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| 申请号 | US35957573 | 申请日 | 1973-05-11 | 公开(公告)号 | US3857295A | 公开(公告)日 | 1974-12-31 |
| 申请人 | DAYCO CORP; | 发明人 | HALL D; CONFER L; LEWIS J; | ||||
| 摘要 | An endless power transmission belt adapted to be operated in a running plane and when viewed in cross section such belt has a pair of oppositely arranged sides wherein one of the sides extends at a greater angle than the other side relative to the running plane, and the belt has a top wall extending between the top edges of the sides and a bottom wall extending between the bottom edges of such sides with at least one of the walls being arranged at an acute angle beneath a plane arranged perpendicular to the running plane and the sides and walls defining a shape which resists and retards the tendency of the belt to distort when running in associated sheaves wherein each has a wide angle sheave side which engages said other side of said belt. | ||||||
| 权利要求 | 1. A power transmission belt adapted to be operated in a running plane and when viewed in cross section said belt comprising, a pair of oppositely arranged sides with one of said sides being arranged at a greater angle than the other side relative to said plane, a top wall extending between the top edges of said sides, and a bottom wall extending between the bottom edges of said sides, at least one of said walls being arranged at an acute angle beneath a plane arranged perpendicular to said running plane, said sides and walls defining a cross-sectional configuration of a trapezium which utilizes the material of the belt to effectively resist and retard the tendency of said belt to distort when running in associated sheaves wherein each sheave has a wide angle sheave side which engages said other side of said belt. 2. A belt as set forth in claim 1 in which said one wall is said top wall. 3. A belt as set forth in claim 1 in which said one wall is said bottom wall. 4. A belt as set forth in claim 1 in which the other of said walls is also arraNged at an acute angle to said perpendicular plane. 5. A belt as set forth in claim 1 having, a tension section which has said top wall defining its top surface, a load-carrying section, and a compression section which has said bottom wall defining its bottom surface. 6. A belt as set forth in claim 5 in which said load-carrying section is in the form of a spirally wound load-carrying cord. 7. A belt as set forth in claim 5 in which said load-carrying cord has substantially the same load-carrying properties throughout its length. 8. A power transmission belt adapted to be operated in a running plane and when viewed in cross section said belt comprising, a tension section, a load-carrying section, a compression section, a pair of oppositely arranged sides with one of said sides being arranged at a greater angle than the other side relative to said plane, a top wall extending between the top edges of said sides and defining the top surface of said tension section, and a bottom wall extending between the bottom edges of said sides and defining the bottom surface of said compression section, at least one of said walls being arranged at an acute angle beneath a plane arranged perpendicular to said running plane, said sides and walls defining a shape which resists and retards the tendency of said belt to distort when running in associated sheaves wherein each sheave has a wide angle sheave side which engages said other side of said belt. 9. A belt as set forth in claim 8 in which said one wall is said top wall. 10. A belt as set forth in claim 8 in which said one wall is said bottom wall. 11. A belt as set forth in claim 8 in which the other of said walls is also arranged at an acute angle beneath said perpendicular plane. 12. A belt as set forth in claim 8 in which said tension and compression sections are each made of an elastomeric material and said load-carrying section includes a spirally wound load-carrying cord. 13. A belt as set forth in claim 12 in which said load-carrying cord is in the form of a polyester cord. 14. A belt as set forth in claim 9 in which said load-carrying section is a spirally wound load-carrying cord having individual coils which have centers which when said belt is viewed in cross section are arranged in a rectilinear line parallel to the said top wall. 15. A belt as set forth in claim 10 in which said load-carrying section is a spirally wound load-carrying cord having individual coils which have centers which when said belt is viewed in cross section are arranged in a rectilinear line parallel to said bottom wall. 16. A belt as set forth in claim 11 in which said load-carrying section comprises a spirally wound load-carrying cord having individual coils which have centers which when said belt is viewed in cross section are arranged in a rectilinear line parallel to at least one of said walls. 17. A belt as set forth in claim 11 in which the other of said walls is arranged at the same acute angle beneath said perpendicular plane as said one wall. 18. A belt as set forth in claim 17 in which said load-carrying section is a spirally wound load-carrying cord having individual coils which have centers which when said belt is viewed in cross section are arranged in a rectilinear line parallel to said top and bottom walls. 19. A belt as set forth in claim 8 in which said tension and compression sections are each made of a rubber compound. 20. A belt as set forth in claim 8 in which said tension and compression sections are each made of a plastic material. 21. A belt as set forth in claim 8 in which said one wall is inclined at an acute angle of roughly three degrees beneath said perpendicular plane. 22. A belt as set forth in claim 18 in which said walls are inclined at an acute angle of roughly three degrees beneath said perpendicular plane. |
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