Excavating – Ditcher – Having endless digger
Patent
1992-09-15
1993-10-05
Reese, Randolph A.
Excavating
Ditcher
Having endless digger
37347, 37464, E02F 506
Patent
active
052493792
ABSTRACT:
A trenching apparatus comprises a boom assembly mounted on a support base which carries a digger arm operative to form a trench alongside the support base following a trench line. The boom assembly includes an inner boom, pivotally connected to a manipulator head which carries the digger arm, and an outer boom pivotally anchored to the support base. The inner boom is slidable within the outer boom by operation of a pair of linear actuators each having an actuator housing mounted to the outer boom, and an actuator rod connected to the end of the inner boom. Mounting structure is provided for securing the linear actuators to the boom assembly which permits at least limited movement of such actuators relative to the boom assembly, and which substantially dampens vibrations and reduces bending and lateral forces transmitted through the boom assembly, so that damage and wear to the linear actuators is substantially reduced.
REFERENCES:
patent: 3388487 (1968-06-01), Peck
patent: 4164082 (1979-08-01), Watson
patent: 4843742 (1989-07-01), Camelleri
patent: 4971157 (1990-11-01), Bollinger et al.
patent: 5104260 (1992-04-01), Trevisani
patent: 5112161 (1992-05-01), Trevisani
patent: 5189819 (1993-03-01), Holloway et al.
Baker John L.
Teel Dannie R.
Eagle-Picher Industries, Inc.
McBee J. Russell
Reese Randolph A.
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