Large volume pressurized fluid dispenser
First Claim
Patent Images
1. A device for infusing liquid into a patient comprising:
- an elongated resilient bladder defining a fluid chamber within the interior of the bladder and a filling port and an exit port in fluid communication with the interior of the bladder;
housing defining a generally circular elongated prestress member, the housing further defining the filling port and the exit port;
the elongated resilient bladder being wrapped about the exterior of the prestress member in a helical manner and in a contracted position such that the bladder is prestressed against the prestress member and the interior of the bladder is substantially empty of fluid when in the contracted position.
1 Assignment
0 Petitions
Accused Products
Abstract
The present invention provides housing containing a cylindrical, prestress member around which an elongated elastomeric bladder is wrapped. This interior of the bladder defines a fluid chamber. A filling port and an exit port are provided in fluid communication with the fluid chamber to provide for filling and dispensing of the liquid. The elongated bladder is wrapped around the cylindrical, prestress member so that the bladder is prestressed in the axial direction when disposed thereon.
36 Citations
13 Claims
-
1. A device for infusing liquid into a patient comprising:
-
an elongated resilient bladder defining a fluid chamber within the interior of the bladder and a filling port and an exit port in fluid communication with the interior of the bladder; housing defining a generally circular elongated prestress member, the housing further defining the filling port and the exit port; the elongated resilient bladder being wrapped about the exterior of the prestress member in a helical manner and in a contracted position such that the bladder is prestressed against the prestress member and the interior of the bladder is substantially empty of fluid when in the contracted position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. A device for infusing liquid into a patient comprising:
-
housing defining a first hollow prestress member and a second prestress member defined internally of the first prestress member, the housing further defining a filling port and an exit port; a first elongated elastomeric bladder defining a first fluid chamber within the interior of the bladder, the first fluid chamber being in fluid communication with the filling port, the first elongated elastomeric bladder being wound about the exterior of the first prestress member in a contracted position such that the first elongated elastomeric bladder is prestressed against the first prestress member and the interior of the first elongated elastomeric bladder is substantially empty of fluid when in the contracted position; a second elongated elastomeric bladder defining a second fluid chamber within the interior of the second elongated elastomeric bladder, the second prestress member contained within the second fluid chamber of the second elongated elastomeric bladder such that the second elongated elastomeric bladder is prestressed against the second prestress member and the interior of the second elongated elastomeric bladder is substantially empty of fluid when in a contracted position, the second elongated elastomeric bladder being in fluid communication with the exit port and the first fluid chamber of the first elongated elastomeric bladder. - View Dependent Claims (10, 11, 12, 13)
-
Specification