Expansible chamber devices – Oscillating working member or cylinder therefor – Oscillatory shaft with radially extending vane
Reexamination Certificate
2011-04-26
2011-04-26
Leslie, Michael (Department: 3745)
Expansible chamber devices
Oscillating working member or cylinder therefor
Oscillatory shaft with radially extending vane
C092S026000, C092S027000
Reexamination Certificate
active
07930971
ABSTRACT:
A vane type hydraulic rotary actuator incorporates a fail-safe brake for preventing movement of the device's rotor relative to a housing in which the rotor is journaled. The brake has a spring-biased piston that is forced to a locked condition whenever applied hydraulic operating pressure acting on the vane falls below a predefined limit. The rotary actuator also incorporates an improved sealing arrangement that prevents egress of hydraulic fluid from a high pressure chamber on one side of the vane to a low pressure chamber on the opposite side of the vane.
REFERENCES:
patent: 2489326 (1949-11-01), Rockstrom et al.
patent: 2564206 (1951-08-01), Johnson
patent: 2975766 (1961-03-01), Henry
patent: 3017807 (1962-01-01), Grover
patent: 3179018 (1965-04-01), Rumsey
patent: 3179020 (1965-04-01), Rumsey
patent: 3195421 (1965-07-01), Rumsey et al.
patent: 3198090 (1965-08-01), French
patent: 3225664 (1965-12-01), Rumsey
patent: 3269737 (1966-08-01), Freese
patent: 3359871 (1967-12-01), Kamman
patent: 3379100 (1968-04-01), Rumsey et al.
patent: 3426654 (1969-02-01), Laughman
patent: 3470793 (1969-10-01), Hanchen
patent: 3521527 (1970-07-01), Gies et al.
patent: 3586137 (1971-06-01), Kamman
patent: 3968731 (1976-07-01), Myers
patent: 4009639 (1977-03-01), Sabashi
patent: 5101862 (1992-04-01), Leete
patent: 5383758 (1995-01-01), Patrick
patent: 5447095 (1995-09-01), Weyer
patent: 5467596 (1995-11-01), Yu
patent: 5996523 (1999-12-01), Fox
patent: 6322341 (2001-11-01), Haas
Helac Corporation, Helical, Hydraulic Rotary Actuators, L10 Series, 2005.
Helac Corporation, Helical, Hydraulic Rotary Actuators, L20 Series, 2005.
Helac Corporation, Helical, Hydraulic Rotary Actuators, L30 Series, 2005.
Leslie Michael
Nikolai Thomas J.
Nikolai & Mersereau , P.A.
LandOfFree
Rotary actuator with internal brake mechanism does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Rotary actuator with internal brake mechanism, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Rotary actuator with internal brake mechanism will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2629692