Motors: expansible chamber type – Plural relatively movable or rigidly interconnected working... – Motors connected in series
Patent
1998-05-04
1999-12-14
Ryznic, John E.
Motors: expansible chamber type
Plural relatively movable or rigidly interconnected working...
Motors connected in series
91536, F15B 1100, F15B 1300
Patent
active
060003154
ABSTRACT:
Frame sections on an implement are supported above the ground by lift wheel assemblies having positive mechanical depth stops and series connected lift cylinders. A pressure responsive bypass valve is installed in series with an orifice between the ports of the series connected cylinders. The valve permits the corresponding cylinder to be retracted and positively held against the depth stop and allows bypass flow to the next cylinder in series for continued retraction of the next cylinder until it bottoms against the stop. The orifice protects the bypass valve poppet from damaging high flows and controls the rate of descent of the other frame sections onto the remaining stops. The system permits the cylinders to positively maintain the down-stopped positions of the sections without unwanted looseness typical with slotted or other lost motion types of connections. A restrictor valve may be added to limit the maximum pressure so that all the bypass valves cannot open at the same time.
REFERENCES:
patent: 3381588 (1968-05-01), Londal
patent: 3476016 (1969-11-01), Dixon et al.
patent: 3486761 (1969-12-01), Fay
patent: 3627053 (1971-12-01), Hook et al.
patent: 3663032 (1972-05-01), Hook et al.
patent: 4164122 (1979-08-01), Ward
patent: 4241641 (1980-12-01), Reinert
patent: 4423664 (1984-01-01), Buchl
patent: 4506898 (1985-03-01), Herron
patent: 4531451 (1985-07-01), Mouton
patent: 4567727 (1986-02-01), Grams
patent: 4655031 (1987-04-01), Kucera
patent: 4821806 (1989-04-01), Winter
patent: 4828655 (1989-05-01), Buchl et al.
patent: 4927165 (1990-05-01), Murray
patent: 5427182 (1995-06-01), Winter
Graham William Douglas
Pratt Ronald Lee
Deere & Company
Ryznic John E.
LandOfFree
Lift control for implement frame does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Lift control for implement frame, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Lift control for implement frame will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-854233