Spring devices – Torsion – Coil
Patent
1977-12-07
1979-04-17
Reger, Duane A.
Spring devices
Torsion
Coil
267 59, F16F 106
Patent
active
041497074
ABSTRACT:
A spring device comprises at least one elastic band which, in released or wound-up position, is rolled against the inside of an outer path and, in wound-up or released position, respectively, is rolled on the outside of a drum which is positioned within the outer path and is rotatable relative thereto. The band is adapted, as it is unrolled from the drum or vice versa, by the action of two or more members which are spaced at least substantially evenly along the periphery of the drum, to maintain its rolled-up position on respectively the outside of the drum and the inside of the outer path to a point from which it directly passes to, and is rolled up on respectively the inside of the outer path and the outside of the drum.
Spring devices of spiral as well as helical type, such as clock springs and roller blind springs, respectively, often have a disadvantage in that the spring force or, more exactly, the torsional moment usually varies substantially linearly from a maximum value when the spring is entirely wound up, to zero when the spring is entirely released. This disadvantage is overcome by the present invention acccording to which the moment either is kept constant throughout the working cycle or has a special variation, e.g. it increases towards the end of the working cycle, which is suitable for roll type belts.
REFERENCES:
patent: 871237 (1907-11-01), Robinson
patent: 1470148 (1923-10-01), Colstad
patent: 3031034 (1962-04-01), Thomas
LandOfFree
Spring device does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Spring device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spring device will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1258700