Reciprocated concrete surfacer member with shielded spring retur

Details Reciprocated concrete surfacer member with shielded spring retur Reciprocated concrete surfacer member with shielded spring retur

1980-05-16

1982-03-23

Pate, III, William F.

Mining or in situ disintegration of hard material

Hard material disintegrating machines

Floor-working

299 69, 404133, 125 41, B28D 126

Patent

active

043209246

ABSTRACT:
A scabbler apparatus having a conventional reciprocated rod is provided with a bit secured to a shank member. A compression spring is adapted to urge the shank and rod upwardly while motive means is provided to drive the rod, shank and bit toward the surface of concrete, rock and the like and against the bias of the spring. A protective retainer and an exclusionary means is provided. This exclusionary means may be a boot, a wiper ring and with or without a one-way valve means. The compression spring is retained at its lower end by a support shelf, usually an inwardly formed flange of the retainer. A washer or ring engages or is carried by the shank of the bit and engages the top end of the spring to urge the shank, the attached bit and the reciprocated rod upwardly.

REFERENCES:
patent: 2559012 (1951-07-01), Davis et al.
patent: 2628599 (1953-02-01), Wilson et al.
patent: 3545554 (1970-12-01), Bardwell
patent: 3810676 (1974-05-01), Clarke

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