Excavating – Digging edge – Oscillating or reciprocating
Patent
1992-06-23
1994-10-11
Reese, Randolph A.
Excavating
Digging edge
Oscillating or reciprocating
37904, 172101, E02F 500
Patent
active
053535324
ABSTRACT:
A characteristic feature of the present invention is that a damping unit is rovided between the casing, impact tool and elements of a pneumatic hammer. The damping unit may have a different design.
REFERENCES:
patent: 4930584 (1990-06-01), Ching et al.
patent: 4959915 (1990-10-01), Roussin et al.
patent: 4984850 (1991-01-01), Jensen
patent: 5094017 (1992-03-01), Matsumoto et al.
Boiko Genrikh K.
Druzhinin Mikhail S.
Lysenko Leonid L.
Mattis Alfred R.
Shishaev Sergei V.
Institut Gornogo Dela Sibirskogo Otdelenia Rossiiskoi Akademii N
Proizvodstvennoe Obiedinenie "Uralmash"
Reese Randolph A.
Warnick Spencer
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