Auger construction providing reduced noise

Details Auger construction providing reduced noise Auger construction providing reduced noise

1977-07-21

1981-05-12

Purser, Ernest R.

Mining or in situ disintegration of hard material

Cutter tooth or tooth head

Tooth mounted on helical head portion or head with helical...

175394, 299 90, 173DIG2, E21C 2510

Patent

active

042668301

ABSTRACT:
An auger construction is provided which reduces the surface noise radiated by the auger and serves to at least partially isolate the auger from the remainder of the machine. The auger construction comprises an inner shaft and outer concentric shafts, the latter carrying the helical cutting blade and generally corresponding to the shaft of a conventional auger. An elongated annulus of noise and vibration dampening material is disposed between the inner and outer shafts. Preferably, the outer shaft is isolated from the machine by further noise dampening material disposed between the mounting flange and the proximate end of that shaft and between the free end of the inner shaft and the end of the hose in the outer shaft. A bore in the inner shaft is also filled with noise dampening material. A number of arrangements are disclosed for fixing the two shafts together so as to prevent rotational slippage therebetween.

REFERENCES:
patent: 2561103 (1951-07-01), Fawick
patent: 2591233 (1952-04-01), Browne
patent: 3003339 (1961-10-01), Haushalter
patent: 3811190 (1974-05-01), Sertich
patent: 3965992 (1976-06-01), Swisher
patent: 4016944 (1977-04-01), Wohlfeld

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