Machine element or mechanism – Control lever and linkage systems – Elements
Patent
1983-06-02
1985-07-02
Krizmanich, George H.
Machine element or mechanism
Control lever and linkage systems
Elements
74110, 244224, G05G 506, F16H 2144
Patent
active
045260583
ABSTRACT:
A hydraulic actuator including a piston rod having a centering mechanism associated therewith which, upon actuation, will return the piston rod to a predetermined position even against loads and lock it in that position and hold it there even without the presence of hydraulic power. The centering and locking mechanism includes a drive mechanism and cam surfaces on the piston rod which are engaged by drive surfaces on the driving mechanism. The drive and cam surfaces are opposed ramps with one of the ramps on the drive mechanism always disposed opposite one of the ramps on the actuator, such that at any position of the stroke of the actuator piston rod the centering and locking mechanism may be actuated and is operable to return the actuator to the predetermined position and lock it in place. The cam surfaces are infinitely variable as to their position on the piston rod within the limits of the dimensions of the drive mechanism.
REFERENCES:
patent: 251070 (1881-12-01), Shaw
patent: 2036154 (1936-03-01), Littledale
patent: 2213264 (1940-09-01), Wall
patent: 2329743 (1943-09-01), Cameron
patent: 2369513 (1945-02-01), Zahodiakin
patent: 2512150 (1950-06-01), Geren
patent: 2598560 (1952-05-01), Kenyon
patent: 2684770 (1954-07-01), Park
patent: 2750994 (1956-06-01), Howell
patent: 2861549 (1958-11-01), Gardener
patent: 3157194 (1964-11-01), Stolte
patent: 3168759 (1965-02-01), Johannigman
patent: 3177976 (1965-04-01), Wenzel
patent: 3283596 (1966-11-01), Roeser
patent: 3358565 (1967-12-01), Townsend
patent: 3416390 (1968-12-01), Houk
patent: 3572161 (1971-03-01), Lichtenberger et al.
patent: 3834198 (1974-09-01), Wiczer
patent: 3834282 (1974-09-01), Kongelbeck
patent: 3890814 (1975-06-01), Fantoni
patent: 4073345 (1978-02-01), Miller
patent: 4177681 (1979-12-01), Wess
Hsu William W.
Runkel Manfred A.
Singer Anthony E.
Zlotski William J.
HR Textron Inc.
Krizmanich George H.
Wright Dirk
LandOfFree
Centering and lock mechanism for hydraulic actuator does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Centering and lock mechanism for hydraulic actuator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Centering and lock mechanism for hydraulic actuator will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-375369