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US 4,043,254 AGranted
Apparatus for cushioning the motion of a reciprocating member
AssigneeEmhart Industries, Inc.
InventorEginhard Jaeger
Life of this patent
Estimating the term…
Abstract
An apparatus for hydraulically cushioning the motion of reciprocating means is provided by first hydraulic cushioning means which is adapted to be contacted by the reciprocating means near the end of its stroke in the direction of the first hydraulic cushioning means, second hydraulic cushioning means adapted to be contacted by the reciprocating means near the end of its stroke in the direction of the second hydraulic cushioning means, and means for adjusting the position at which the reciprocating means contacts at least one of said first and second hydraulic cushioning means.
Claims7
In a glassware forming machine, apparatus for hydraulically cushioning the motion of reciprocating means in both directions, comprising:
- means for reciprocating the reciprocating means;
- first hydraulic cushioning means disposed to be contactable by the reciprocating means to cushion the motion of the reciprocating means in one direction, said first cushioning means comprising a first housing, a cylinder disposed in said first housing, said cylinder having a plurality of metering orifices therein, a piston slidably disposed in said cylinder and forming with said cylinder a first chamber on one side of said piston and second chamber on the opposite side of said piston, a third chamber adapted to be filled with liquid, disposed between said first housing and said cylinder and in fluid communication with said first and second chambers, said piston adapted to be contacted by the reciprocating means near the end of the stroke of the reciprocating means in the direction of said first cushioning means;
- second hydraulic cushioning means disposed to be contactable by the reciprocating means to cushion the motion of the reciprocating means in the opposite direction, said second cushioning means comprising a second housing, a cylinder disposed in said second housing, said cylinder having a plurality of metering orifices therein, a piston slidably disposed in said cylinder and forming with said cylinder a first chamber on one side of said piston and a second chamber on the opposite side of said piston, a third chamber adapted to be filled with liquid, disposed between said second housing and said cylinder and in fluid communication with said first and second chambers, said piston adapted to be contacted by the reciprocating means near the end of the stroke of the reciprocating means in the direction of said second cushioning means;
- said metering orifices of said first and second hydraulic cushioning means each having a diameter which is greater than the dimension of the orifices in the direction of the flow of fluid therethrough, whereby said first and second hydraulic cushioning means each provide a cushion with substantially constant deceleration of the reciprocating means and which is independent of the viscosity of said liquid;
- and
- means for adjusting the position at which the reciprocating means contacts at least one of said first and second hydraulic cushioning means.
3 more elements
In a glassware forming machine, apparatus for hydraulically cushioning the motion of reciprocating means in both directions comprising:
- means for reciprocating the reciprocating means;
- first hydraulic cushioning means disposed to be contactable by the reciprocating means to cushion the motion of the reciprocating means in one direction, said first cushioning means comprising a first housing, a cylinder disposed in said first housing, said cylinder having a plurality of metering orifices therein, a piston slidably disposed in said cylinder and forming with said cylinder a first chamber on one side of said piston and a second chamber on the opposite side of said piston, a third chamber adapted to be filled with liquid, disposed between said first housing and said cylinder and in fluid communication with said first and second chambers, said piston adapted to be contacted by the reciprocating means near the end of the stroke of the reciprocating means in the direction of said first cushioning means;
- second hydraulic cushioning means disposed to be contactable by the reciprocating means to cushion the motion of the reciprocating means in the opposite direction, said second cushioning means comprising a second housing, a cylinder disposed in said second housing, said cylinder having a plurality of metering orifices therein, a piston slidably disposed in said cylinder and forming with said cylinder a first chamber on one side of said piston and a second chamber on the opposite side of said piston, a third chamber adapted to be filled with liquid, disposed between said second housing and said cylinder and in fluid communication with said first and second chambers, said piston adapted to be contacted by the reciprocating means near the end of the stroke of the reciprocating means in the direction of said second cushioning means;
- means for adjusting the position at which the reciprocating means contacts at least one of said first and second hydraulic cushioning means;
- fluid connection means for connecting said first hydraulic cushioning means with said second hydraulic cushioning means;
- fluid inlet means in said third chamber of said first hydraulic cushioning means in fluid connection with a source of hydraulic fluid;
- fluid outlet means in said third chamber of said second hydraulic cushioning means;
- means for sensing the fluid pressure in one of said first and second hydraulic cushioning means;
- and
- means for adding additional hydraulic fluid to said fluid inlet means in response to a pressure sensed by said means for sensing the fluid pressure below a predetermined limit.
7 more elements
Dependencies are inferred from the claim text.