Movable or removable closures – With means to vary opening span or speed during movement
Patent
1991-08-29
1992-08-18
Kannan, Philip C.
Movable or removable closures
With means to vary opening span or speed during movement
49360, E05F 1500
Patent
active
051387956
ABSTRACT:
A sliding door in a van is mounted on tracks for sliding movement between open and closed positions. At the closed position a weather strip is compressed and a door latch is latched. A cable is attached to the door and routed through the vehicle body via pulleys so that pulling the first cable end opens the door and pulling the second cable end closes the door. A motorized drive mechanism includes first and second reels mounted concentrically and having the cable ends wrapped respectively about the reels in opposite directions. A motor drives in one direction rotating the first reel to open the door and is reversible to rotate the second reel to close the door. Each of the reels has a large diameter portion for winding the cable to provide relatively high speed and low force door movement over the greatest portion of travel and a small diameter portion for winding the cable to provide relatively low speed and high force movement of the door during the lesser portion of travel of the door closest to the closed position. The reels have cable set grooves to receive the cable and a spiral ramp groove to connect the large and small diameter portions. A tension retaining spring acts between the two reels to always maintain the cable under tension.
REFERENCES:
patent: 44390 (1864-09-01), Bates
patent: 1874077 (1932-08-01), Anderson
patent: 3499478 (1970-03-01), Schneider
patent: 4617757 (1986-10-01), Kagiyama et al.
patent: 5025591 (1991-06-01), Deland et al.
Compeau David E.
Manuel Mark
Nicholas Mark D.
Priest William L.
Rogers, Jr. Lloyd W.
General Motors Corporation
Kannan Philip C.
Leahy Charles E.
LandOfFree
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