Excavating – Combined or convertible – Having quick-connect coupling
Reexamination Certificate
2007-05-16
2010-06-15
Pezzuto, Robert E (Department: 3671)
Excavating
Combined or convertible
Having quick-connect coupling
C414S723000
Reexamination Certificate
active
07735249
ABSTRACT:
Quick-change device (12) comprising a quick coupler (16) fastened on the driven-machine side, an adapter (16) which can be locked with the quick coupler (16) and is connected to a tool (14), and a hydraulic coupling (20) for producing a hydraulic connection between the hydraulic system on the driven machine and the hydraulics of the tool (14), wherein the hydraulic coupling (20) includes a first coupling part (20a) and a second coupling part (20b) and the two coupling parts (20a,20b) are held relative to one another in an operating position, wherein the first coupling part (20a) and the second coupling part (20b) interact with at least mechanical retaining means (68,78,80) which are formed separately from the locking means of the quick-change device (12). The invention is distinguished by the fact that the coupling parts (20a,20b) are held frictionally in the operating position by the mechanical retaining means (67,78, 80).
REFERENCES:
patent: 4938651 (1990-07-01), Gilmor et al.
patent: 6428265 (2002-08-01), Gilmore, Jr.
patent: 7032335 (2006-04-01), Short
patent: 7246457 (2007-07-01), Mieger et al.
patent: 7306395 (2007-12-01), Fatemi
patent: 7648305 (2010-01-01), Beales
patent: 102004014824 (2005-10-01), None
patent: 1566489 (2005-08-01), None
patent: 1580330 (2005-09-01), None
patent: 2007/004414 ISR (2007-08-01), None
patent: 2676765 (1992-11-01), None
patent: 2004/072387 (2004-08-01), None
Lehnhoff Hartstahl GmbH & Co. KG
Pezzuto Robert E
Woodling Krost and Rust
LandOfFree
Quick-change device does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Quick-change device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Quick-change device will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4215482