F - Mech Eng,Light,Heat,Weapons – 15 – B
Patent
F - Mech Eng,Light,Heat,Weapons
15
B
138/45.1
F15B 7/00 (2006.01) A01F 12/56 (2006.01) A01F 29/14 (2006.01) F16H 61/46 (2006.01)
Patent
CA 1204983
Abstract An anti-plug control for a drive to prevent jamming of a driven working element in response to an overload wherein said drive includes a hydrostatic transmission having a variable displacement unit and a fixed displacement unit connected in closed circuit. A servo control cylinder is connected to a swash plate of the variable displacement unit for causing position- ing thereof. A normally closed pressure-responsive valve monitors the pressure in the high pressure side of the closed circuit and is openable when the pressure reaches a predetermined value to deliver fluid from the closed circuit to the servo control cylinder and modify the displacement of the variable displacement unit to in- crease the speed of the working element to attempt clearing the overloaded condition of the working element.
438556
Riches Mckenzie & Herbert Llp
Sundstrand Corporation
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