Breastpump
Patent 4857051 Issued on August 15, 1989. Estimated Expiration Date: 
May 22, 2007. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
May 22, 2007. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 1184293 3583434 Breast pump Breast pump Breast pump Patent #: 4673388 InventorAssigneeApplicationNo. 07/053055 filed on 05/22/1987US Classes:604/74, Lacteal extractors (e.g., breast pump, etc.)604/346Receptacles receiving protruding body member (e.g., ears, genitalia, breast, etc.)ExaminersPrimary: Kruter, Jerome L.Attorney, Agent or FirmInternational ClassesA61M 1/06 (20060101)A61M 1/00 (20060101) Foreign Application Priority Data1980-09-05 CHAbstractA breastpump is provided with a valve mechanism that closes a collection chamber when a vacuum is applied to a hood member and opens the collection chamber when the vacuum is removed. The valve mechanism is removably attached to the collection chamber for ready cleaning. A baffle in the hood member protects the vacuum line from milk flow. One embodiment of the invention has a connecting sleeve for connecting either a manually driven pneumatic pump or a motor driven pneumatic pump to the hood body to create an intermittent vacuum. A connector is further provided for use with a pair of breastpumps operated simultaneously by a motor driven pneumatic pump. An adjustment piece for decreasing the cross-sectional area of a funnel-shaped hood member is also disclosed for use of the breastpumps with smaller breasts. One type of manually driven piston pump useful with the invention has apertures formed through the pump cylinder wall that are selectively opened and closed for adjustment of the piston pump vacuum.Field of SearchLacteal extractors (e.g., breast pump, etc.)With collapsible bulb means With suction generated orally by person or user Having means for varying, regulating, indicating, or limiting injection pressure or aspirating suction Means varying or regulating suction With flow control means (e.g., antibackflow valve, etc.) With flow control means (e.g., valve, etc.) | |
