Power plants – Pressure fluid source and motor – Pump means moves motive fluid from one chamber to an...
Patent
1987-05-21
1990-03-27
Look, Edward K.
Power plants
Pressure fluid source and motor
Pump means moves motive fluid from one chamber to an...
91357, 91402, 91408, 91409, F16D 1302
Patent
active
049109618
ABSTRACT:
A hydraulic door opening or closing device comprises a hydraulic fluid pump motor having two ports connected to each end of integral dual manifold and operating cylinder apparatus by way of two branch fluid lines. One branch line is fluidly connected to a particular end of the operating cylinder by way of a directional flow valve. The other branch line to the same end of the cylinder is fluidly connected to the cylinder by way of an associated manifold. Fluid communication with the cylinder through the manifold is accomplished by providing a plurality of valved openings linearly disposed along the end of the cylinder between the manifold and the cylinder. As a piston of the operating cylinder passes these openings, a door coupled to the piston is automatically slowed as fluid on the drive side of the piston is returned through the openings to the hydraulic fluid pump. A simplified control circuit coupled to the device provides three modes of operation, an opening mode, a closing mode and a reversing mode from door opening to door closing.
REFERENCES:
patent: 1278863 (1918-09-01), Crusius
patent: 1301757 (1919-04-01), Steffes
patent: 2202836 (1940-06-01), Coupland
patent: 2212998 (1940-08-01), Crane
patent: 2954755 (1960-10-01), Pecchenino
patent: 4118931 (1978-10-01), Nonnenmacher
patent: 4140044 (1979-02-01), Biller
patent: 4151784 (1979-05-01), Fussangel
patent: 4296570 (1981-10-01), Balbach et al.
patent: 4399653 (1983-08-01), Pylat, Jr.
patent: 4642986 (1987-02-01), Chatelin
patent: 4696163 (1987-09-01), Glomeau
patent: 4735292 (1988-04-01), Munz
Look Edward K.
Vertran Manufacturing Company
LandOfFree
Hydraulic door opening or closing 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 Hydraulic door opening or closing device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hydraulic door opening or closing device will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1642240