Machine element or mechanism – Elements – Gear casings
Patent
1984-12-24
1987-07-14
Braun, Leslie
Machine element or mechanism
Elements
Gear casings
74720, F16H 4704
Patent
active
046794620
ABSTRACT:
A differential transmission mechanism using an output differential for a constant speed drive has desirable characteristics including full utilization of the torque capabilities of the hydraulic trim device associated with the output differential; however, there is a limitation on the utilization of the speed capability of the hydraulic components of the trim device at the low end of the input speed range.
The disclosed differential transmission mechanism utilizing an output differential has a hydraulic trim device with a first hydraulic displacement unit having a normally fixed, approximately maximum displacement connected to an element of the output differential and a second hydraulic displacement unit which is of variable displacement connected to a variable speed input shaft. Additional components of the output differential are connected to the input shaft and to an output shaft connectable to a load. A sensing device senses the speed of the output shaft to control the displacement of the variable displacement hydraulic displacement unit to control the displacement thereof to achieve a constant output speed by varying the speed of the normally fixed displacement unit as required. Additionally, a sensor senses the speed of the input shaft and, when the speed of the input shaft is below a predetermined value, controls the displacement of the normally fixed displacement unit to reduce the displacement thereof to effectively make the latter displacement unit a smaller unit which will therefore operate at a faster speed to extend the range of the constant speed drive at the low end of the input speed range.
REFERENCES:
patent: Re30525 (1981-02-01), DeLalio
patent: 3107490 (1963-10-01), Cooper
patent: 3274855 (1966-09-01), Reynolds et al.
patent: 3303724 (1967-02-01), Reeves, Jr.
patent: 3396607 (1968-08-01), Ross
patent: 3470769 (1969-10-01), Livezey
patent: 3600106 (1971-08-01), Baits
patent: 3733924 (1973-05-01), Zentz et al.
patent: 3733931 (1973-05-01), Nyman et al.
patent: 3897647 (1975-08-01), Chambers et al.
patent: 3903756 (1975-09-01), Hamma
patent: 3969957 (1976-07-01), DeLalio
patent: 3979972 (1976-09-01), Sakai et al.
patent: 3990327 (1976-11-01), Margolin
patent: 4019404 (1977-04-01), Schauer
patent: 4306467 (1981-12-01), Pollman
patent: 4373408 (1983-02-01), Mills
Baits Stephen S.
Reynolds Richard W.
Braun Leslie
Novais David
Sundstrand Corporation
LandOfFree
Differential transmission mechanism for a constant speed drive does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Differential transmission mechanism for a constant speed drive, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Differential transmission mechanism for a constant speed drive will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1421314