Spring devices – Coil – Including end thrust member
Patent
1984-10-10
1987-06-16
Reger, Duane A.
Spring devices
Coil
Including end thrust member
188380, F16F 302
Patent
active
046731709
ABSTRACT:
The mechanism is used to dampen the recoil or kickback effects of a machine, such as a machine gun, jack hammer, or the like which generates short duration, high-amplitude unidirectional forces. The mechanism includes an ancillary mass interposed between the base and the recoil mass. A relatively stiff spring is engaged at one end to the recoil mass, which is in contact with the ancillary mass at the other end only over part of the recoil cycle. A constant force spring mechanism is interposed between the ancillary mass and the base and is engaged at one end to the base and may be engaged to the ancillary mass at the other end. The mechanism prevents motion of the recoil mass and reduces the maximum recoil force transmitted to the base by transferring the original short-duration, high-amplitude recoil driving force impulse first to the ancillary mass, in the form of momentum of the ancillary mass, and subsequently to the base as a longer duration, lower amplitude recoil force. A trigger latch can be used to cock into position the ancillary mass and the compressed constant force spring mechanism. When the trigger is pulled, the ancillary mass is accelerated towards the stiff spring. The two are in contact during the period of the recoil driving force, with almost no net motion of the recoil mass.
REFERENCES:
patent: 807314 (1905-12-01), Pepple
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