Invention Grant
- Patent Title: Dispenser having variable-volume storage chamber and depressible one-way valve assembly for dispensing creams and other substances
- Patent Title (中): 分配器具有可变容量储存室,单向阀和手动按压致动器及方法
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Application No.: US11897928Application Date: 2007-08-31
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Publication No.: US07644842B2Publication Date: 2010-01-12
- Inventor: Daniel Py
- Applicant: Daniel Py
- Applicant Address: US CT New Milford
- Assignee: Medical Instill Technologies, Inc.
- Current Assignee: Medical Instill Technologies, Inc.
- Current Assignee Address: US CT New Milford
- Agency: McCarter & English, LLP
- Main IPC: B65D88/54
- IPC: B65D88/54

Abstract:
A dispenser has a housing, and a variable-volume storage chamber formed within the housing and defining a substantially fluid-tight seal between the chamber and exterior of the housing for storing a substance to be dispensed. A piston is mounted within the housing, and a one-way valve is mounted within the housing and coupled in fluid communication with the variable-volume storage chamber. A compression chamber is coupled in fluid communication between the piston and one-way valve, and at least one of the piston and valve is manually depressible relative to the other between (i) a first position in which the piston is located at least partially outside of the compression chamber for permitting substance to flow from the variable-volume storage chamber into the compression chamber, and (ii) a second position in which the piston is located at least partially within the compression chamber for pressurizing substance within the compression chamber above a valve opening pressuring and, in turn, dispensing substance through the one-way valve and out of the dispenser.
Public/Granted literature
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