Hand held dispensing and application apparatus
US6902335B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 8, 2003 |
| Grant date | Jun 7, 2005 |
| Priority date | — |
| Expiry date | May 8, 2023 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61J1/2024
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A dispensing and application apparatus designed to contain pre-measured amounts of a flowable substance. The apparatus comprises a compartment 130 for storing the substance that is partially enclosed by a frangible seal 210, an applicator 100, and an expandable chamber 170 designed to accept and dissipate the hydraulic force created when pressure is applied to the compartment 130, rupturing the frangible seal 210, and expelling the substance into the chamber 170. The applicator 100 is attached to the chamber 170 with an applicator bond area 180. The expandability of the chamber 170 is conferred by expandability of the applicator 100, and is varied in different embodiments by altering the ratio between the area of the applicator bond area 180 and the area of the applicator 100. The frangible seal 210, in one of many embodiments, may be a chevron shape stress riser 250 with a point of inflection 260 oriented towards the compartment 130. A removable cap may cover the applicator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.