Excavating – Snow or ice removing or grooming by portable device – Railway clearer
Patent
1990-05-11
1991-10-15
Taylor, Dennis L.
Excavating
Snow or ice removing or grooming by portable device
Railway clearer
37135, 37141R, 172719, 172751, 172753, 403319, 403331, 403381, E02F 928
Patent
active
050562436
ABSTRACT:
A locked connection for structures engageable with abrasive material and the like including a pair of relatively elongated elements at least one of which is subject to abrasive wear, the elements having parallel longitudinally extending centerlines and spaced apart generally planar surfaces arranged at an angle to the centerlines and between which a bi-stress lock is positioned.
REFERENCES:
patent: 3469331 (1969-09-01), Wood
patent: 4057294 (1977-11-01), Krekeler
patent: 4501079 (1985-02-01), Hahn et al.
patent: 4716666 (1988-01-01), Potter
Briscoe Terry L.
Sprunger Paul C.
ESCO Corporation
Olsen Arlen L.
Taylor Dennis L.
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