发明名称 |
CABLE DRUM CONSTRUCTION OF DOOR LIFT MECHANISM FOR MULTIPLE HORIZONTAL PANEL GARAGE DOOR WITH DISPROPORTIONALLY HEAVY TOP PORTION |
摘要 |
<p>A cable lift mechanism for a multi panel, overhead garage door includes a drum having a spiral groove comprised of two adjacent sections that are generally coaxial with the longitudinal axis of the cable drum. The groove or grooves in a first section adjacent the attachment end of the cable to the drum have a lesser radius than the remaining grooves of the second section of the drum which have substantially equal radii of greater diameter than the first section radii. As a consequence, initial torque associated with lifting of a garage door is increased to lift a heavier upper or top panel or panels of a multi-panel garage door.</p> |
申请公布号 |
CA2786363(A1) |
申请公布日期 |
2013.02.23 |
申请号 |
CA20122786363 |
申请日期 |
2012.08.15 |
申请人 |
RAYNOR MFG. CO. |
发明人 |
FRIESEN, RAYMOND J.;SAMBHI, SURINDER |
分类号 |
E05D13/00;B66D1/30;B66D1/36 |
主分类号 |
E05D13/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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