| US 7,357,899 B2 | ||
| Reagent addition system and method | ||
| Patrick Gaillard, Bayville, N.Y. (US); Peter Kurzyna, Albertson, N.Y. (US); and Drasko Vukicevic, Oyster Bay, N.Y. (US) | ||
| Assigned to Oyster Bay Pump Works, Inc., Hicksville, N.Y. (US) | ||
| Filed on Oct. 10, 2006, as Appl. No. 11/545,215. | ||
| Application 11/545215 is a division of application No. 10/132366, filed on Apr. 25, 2002, granted, now 7,125,520. | ||
| Claims priority of provisional application 60/286388, filed on Apr. 25, 2001. | ||
| Prior Publication US 2007/0031294 A1, Feb. 08, 2007 | ||
| Int. Cl. B01L 3/02 (2006.01) | ||
| U.S. Cl. 422—100 [422/99; 422/101; 422/102; 222/283; 222/309; 222/287; 604/155; 73/864.18] | 4 Claims |
| 3. A piston coupling for a micro-liter range liquid dispensing system for connecting a piston to a piston drive shaft, the
coupling comprising:
a U-shaped body portion having a U-shaped arm; and
an annular barrel-shaped bearing seated in the U-shaped body portion and retained by the U-shaped arm, said bearing including
an axial bore for receiving the piston, wherein said annular barrel-shaped bearing is designed for balancing the forces applied
to the piston by the piston drive shaft symmetrically about the centerline of the piston and,
wherein said U-shaped body portion includes a bore for receiving a piston drive shaft, said body portion bore defining a piston
drive shaft axis, and wherein said bearing axial bore defines a piston axis, and wherein said barrel-shaped bearing is pivotable
within said U-shaped body portion for permitting angular misalignment between said piston drive shaft axis and said piston
axis.
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