04646945 is referenced by 110 patents and cites 16 patents.

A dispenser for liquid soap includes a compressible nipple having an annular flange mountable on a soap container in communication with the outlet opening thereof, and clamping therebetween a valve assembly including a slitted flexible diaphragm and a backing disc. The disc has a discharge opening in alignment with a check valve slit in the diaphragm for controlling discharge of soap into the nipple for dispensing upon compression of the nipple. The disc and the nipple flange respectively have annular grooves formed in the facing surfaces thereof, a vent valve slit in the diaphragm being aligned with these grooves. The flange groove communicates with the outside of the nipple through a vent opening and the disc groove communicates with the outlet opening of a container through a vent orifice in the disc. The diaphragm thickness is less than the depth of the disc groove and greater than the depth of the nipple flange groove, so that it can open only inwardly to permit air to enter the container, but cannot open outwardly to permit discharge of soap through the vent opening.

Title
Vented discharge assembly for liquid soap dispenser
Application Number
6/749736
Publication Number
4646945
Application Date
June 28, 1985
Publication Date
March 3, 1987
Inventor
Leslie G Struck
Arlington Heights
IL, US
Robert L Steiner
Chicago
IL, US
Agent
Emrich & Dithmar
Assignee
Steiner Company
IL, US
IPC
B65D 37/00
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