Liquid dispensing apparatus
US4623337A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 8, 1984 |
| Grant date | Nov 18, 1986 |
| Priority date | — |
| Expiry date | Mar 8, 2004 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05B11/1092
- WIPO fieldChemical engineering
- WIPO sectorChemistry
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).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.