Viscous fluid timed infusion device
First Claim
1. A viscous fluid timed infusion device comprising a cylindrical main housing, an orifice in one end of said housing, a plunger sealingly engaging inner side walls of said main housing and slidably therein, main spring means operatively positioned between said main housing and said plunger urging said plunger toward said orifice to force a fluid in said cylinder through said orifice, and a viscous fluid timing device independent of said oriface and operatively connected to said plunger for controlling rate of movement of said plunger towards said orifice in response to flow of viscous fluid through said timing device.
0 Assignments
0 Petitions
Accused Products
Abstract
A viscous fluid timed infusion device having a cylindrical housing having an orifice in one end. A plunger is movable in the housing and spring means are operatively positioned in the housing to urge the plunger towards the orifice. A viscous fluid timing device controls rate of movement of the plunger towards the orifice.
36 Citations
8 Claims
- 1. A viscous fluid timed infusion device comprising a cylindrical main housing, an orifice in one end of said housing, a plunger sealingly engaging inner side walls of said main housing and slidably therein, main spring means operatively positioned between said main housing and said plunger urging said plunger toward said orifice to force a fluid in said cylinder through said orifice, and a viscous fluid timing device independent of said oriface and operatively connected to said plunger for controlling rate of movement of said plunger towards said orifice in response to flow of viscous fluid through said timing device.
- 3. A viscous fluid timed infusion device comprising a cylindrical main housing, an orifice in one end of said housing, a plunger sealingly engaging inner side walls of said main housing and slidable therein, main spring means operatively positioned between said main housing and said plunger urging said plunger towards said orifice to force a fluid in said cylinder through said orifice, and a viscous fluid timing device for controlling rate of movement of said plunger towards said orifice, said viscous fluid timing infusion device comprising a cylindrical auxiliary metering valve housing closed at one end and having an opening at its opposite end containing a viscous fluid, a metering valve piston movable in said auxiliary metering valve housing and operatively connected to said plunger whereby leakage of viscous fluid in said auxiliary metering valve housing about said piston controls rate of movement of said piston in said auxiliary metering valve housing.
Specification