Piston overtravel indicator
AssigneeMidland-Ross Corporation
InventorKay S. Poynter
Life of this patent
Estimating the term…
Abstract
A pressure converter for converting and intensifying pneumatic pressure to hydraulic pressure includes a pneumatic piston movable in a cylinder and connected by a rod with a smaller hydraulic piston. The pneumatic piston is movable from a rest position to normal working positions. Indicator means includes a first electrically operated signal and a second visual signal for respectively indicating overtravel and degree of overtravel of the pneumatic piston beyond the normal working positions. The pneumatic piston is engageable with the indicator means upon movement of such piston beyond its normal working positions for actuating the electrically operated signal and the visual signal.
Claims9
An overtravel indicator for indicating with two different signals overtravel and degree of overtravel of a piston movable from a rest position adjacent one end of a cylinder to normal working positions toward the other end of the cylinder, comprising;
- an elongated rod mounted for axial movement in said other end of said cylinder and having an inner rod end located within said cylinder in spaced relationship to said other end and to said normal working positions, electrically operated indicating means for indicating overtravel of said piston beyond said normal working positions, switch means for energizing said electrically operated indicating means, cooperating means on said rod for actuating said switch means upon slight axial movement of said rod when said piston moves beyond said normal working positions and acts on said inner rod end, and said rod being projectable varying distances outwardly of said other end for indicating the degree which said piston moves beyond said normal working positions.
In a pressure converter for converting and intensifying pneumatic pressure to hydraulic pressure and including a pneumatic piston movable in a cylinder and connected by a rod with a smaller hydraulic piston, said pneumatic piston being movable from a rest position to normal working positions, indicator means including a first electrically operated signal and a second visual signal for respectively indicating overtravel and degree of overtravel of said pneumatic piston beyond said normal working positions, a movable indicator member for operating said first and second signals, said pneumatic piston being engageable with said indicator member only upon movement of said pneumatic piston beyond said normal working positions for moving said indicator member and placing said first and second signals in their operated positions.
Dependencies are inferred from the claim text.