Traversing hoists – Having random condition sensor combined with an indicator or... – Senses crane tilt
Reexamination Certificate
2008-04-29
2008-04-29
Brahan, Thomas J. (Department: 3654)
Traversing hoists
Having random condition sensor combined with an indicator or...
Senses crane tilt
C212S304000, C212S305000, C280S765100
Reexamination Certificate
active
07364044
ABSTRACT:
The present invention provides a safety device against crane overturning which operates in a crawler crane comprising at least four outriggers in a frame, the safety device comprising a load detector2that detects a ground reaction to each of the outriggers, and an alarm output section4which calculates sums of detected values for ground reactions to every two adjacent outriggers to find a minimum value of the sums. The alarm output section then compares the minimum value obtained with a preset preliminary reference value and a preset limit reference value and outputs a preliminary alarm signal when the minimum value is smaller than the preliminary reference value or outputs a limit alarm signal when the minimum value is smaller than the limit reference value. This prevents safety from being degraded as a result of a change in the working radius of the crane. Further, calculation processes are simplified.
REFERENCES:
patent: 2855111 (1958-10-01), McIntyre, Sr.
patent: 3608756 (1971-09-01), Guinot
patent: 3713129 (1973-01-01), Buchholz
patent: 3824578 (1974-07-01), Harders
patent: 4266627 (1981-05-01), Lauber
patent: 4765423 (1988-08-01), Karpa
patent: 5119949 (1992-06-01), Kishi
patent: 5217126 (1993-06-01), Hayashi et al.
patent: 5622235 (1997-04-01), Merritt
patent: 5887735 (1999-03-01), Abel
patent: 5961145 (1999-10-01), Schillinger et al.
patent: 6360905 (2002-03-01), Frommelt et al.
patent: 6735486 (2004-05-01), Hoffelmeyer et al.
patent: 7005587 (2006-02-01), Axakov et al.
patent: 7012540 (2006-03-01), Petzold et al.
patent: 2002/0020231 (2002-02-01), Saitoh et al.
patent: 51-11556 (1976-01-01), None
patent: 03-025495 (1991-03-01), None
patent: 06-018120 (1991-03-01), None
patent: 05-046880 (1993-06-01), None
patent: 06-063577 (1994-09-01), None
patent: 08-073189 (1996-03-01), None
patent: 10-072187 (1998-03-01), None
patent: 10-291779 (1998-11-01), None
patent: 2001-220086 (2001-08-01), None
patent: 2002-003172 (2002-01-01), None
patent: 2002-104777 (2002-04-01), None
International Preliminary Report on Patentability for International Application No. PCT/JP2004/004910.
Notification and International Preliminary Report on Patentability dated Oct. 14, 2005.
English Translation of Decision of Rejection for Patent Application No. JP 2003-105,997.
Brahan Thomas J.
Furukawa Co., Ltd.
Young & Basile
LandOfFree
Safety device against overturning crane does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Safety device against overturning crane, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Safety device against overturning crane will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2780530