Liquid dispensing apparatus

Patent 4623337 Issued on November 18, 1986. Estimated Expiration Date:

March 8, 2004. 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.

Abstract Claims Description Full Text

Patent References

3162217

Fountain tooth-brush
Patent #: 4013370
Issued on: 03/22/1977
Inventor: Gingras

Dose metering plunger devices for use with syringes
Patent #: 4498904
Issued on: 02/12/1985
Inventor: Turner , et al.

Eye drop application aid Patent #: 4531944
Issued on: 07/30/1985
Inventor: Bechtle

Inventor

Maurice, David M.

Assignee

Alpha Group, Inc.

Application

No. 06/587663 filed on 03/08/1984

US Classes:

604/298, Having means for metering liquid flow to eye222/390Screw actuated

Examiners

Primary: Yasko, John D.
Assistant: Kruter, J. L.

Attorney, Agent or Firm

International Classes

A61F 9/00 (20060101)
B05B 11/00 (20060101)
B05B 11/02 (20060101)

Abstract

An apparatus (10) for the repetitive dispensing of a predetermined quantity of eyedrops (12) has a cylinder (14) with a restricted opening (18) at a first end (16). A plunger (20) attached to rod (23) extends into the cylinder (14) from end (22). Biasing member (28) has a ramped cam surface (32) incorporating a pair of steps (46), actuating member (26) has an opposed surface (30) with a projection (44) which rides on ramped cam surface (32) and drops off step (46) when actuating member (26) is rotated. Rotation of the actuating member (26) also advances the actuating member (26) on threaded member (24). Spring (42) biases surfaces (30) and (32) together. A projection (44) drops over each step (46), plunger (20) is moved incrementally toward end (16) of cylinder (14) to discharge eyedrops (12) through opening (18 ). A disposable cartridge (50) may be substituted for the cylinder (14).