Land vehicles – Wheeled – Attachment
Patent
1975-03-17
1976-05-25
Makay, Albert J.
Land vehicles
Wheeled
Attachment
188 67, 212145, B60S 900, B66C 2380
Patent
active
039588130
ABSTRACT:
Hydraulically powered outrigger beams for cranes including a positive safety locking system for securing the outrigger beams in a fixed downward position to provide stabilization of the vehicle and crane during operation of the crane. The locking system includes a vertically extending interlocking multiple-toothed pawl and ratchet means for locking each of the beams in its downward position. The interlocking ratchet means generally includes a vertically orientated ratchet rack slideable in a rack guide which is secured to the frame, and which rack is engageable with a pivotal multi-toothed pawl means which is spring biased into engagement with the ratchet rack and which functions to wedge said rack between the upper surface of the beam and the frame. The multi-toothed pawl is provided with pneumatic means for forcing it out of engagement with said ratchet rack to allow said outrigger beams to return to an upward position.
REFERENCES:
patent: 1072313 (1913-09-01), Conte
patent: 1711059 (1929-04-01), Marklein
patent: 2512150 (1950-06-01), Geren
patent: 2725707 (1955-12-01), Peterson
patent: 3019913 (1962-02-01), Bowman
patent: 3164261 (1965-01-01), Larson
patent: 3181891 (1965-05-01), Moats
patent: 3279622 (1966-10-01), Person
patent: 3365214 (1968-01-01), Garnett
Harnischfeger Corporation
Makay Albert J.
Nilles James E.
Oresky Lawrence J.
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