Ripper using a hydraulic hammer and a method for making the impr

Details Ripper using a hydraulic hammer and a method for making the impr Ripper using a hydraulic hammer and a method for making the impr

1988-11-28

1990-03-06

Massie, Jerome W.

Mining or in situ disintegration of hard material

Hard material disintegrating machines

Floor-working

299 69, 299 94, 173133, E21C 304

Patent

active

049060490

ABSTRACT:
An improved ripper using a hydraulic hammer with a rotating long service life hammer tool is provided. The tool is cylindrical with a large cylindrical upper portion and a central portion of reduced diameter. The tool is retained in the hammer by means of a pin passing through the tool cavity of the hammer housing which prevents passage of the large upper portion.

REFERENCES:
patent: 1880337 (1932-10-01), App
patent: 3519309 (1970-07-01), Engle et al.
patent: 3770322 (1973-11-01), Cobb et al.
patent: 4034817 (1977-07-01), Okada
patent: 4131165 (1978-12-01), Wanner et al.
patent: 4679857 (1987-07-01), Roussin et al.
patent: 4724912 (1988-02-01), Miyazaki et al.

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