F - Mech Eng,Light,Heat,Weapons – 15 – B
Patent
F - Mech Eng,Light,Heat,Weapons
15
B
F15B 15/22 (2006.01) F15B 15/08 (2006.01)
Patent
CA 2088733
ABSTRACT OF THE DISCLOSURE A pneumatic, rotary, rack and pinion actuator with counter-pressure actuated damping device. The actuator comprises first and second rack and piston assemblies reciprocable inside corresponding pneumatic cylinders, which engage on the opposite sides of a pinion on and output shaft. Each rack and piston assembly is provided with an axially extending duct opening at opposite ends into a drive chamber and a counter-pressure control chamber, respectively; counter-pressure control and damping means are provided in the piston-assemblies and cylinders, comprising a throttling valve opening into the control chamber and a check valve in said ducts; a thrust pin member protrudes in the control chamber and into the duct end to open the check valve and fed in a controlled manner pressurised air from the drive chamber into the control chamber, before each rack and piston assembly reaches the end of its stroke.
Robic
Univer S.p.a.
LandOfFree
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