Piston cap and boot seal for a medication infusion system
US4940399A · kind A · utility
10Cited by
11References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 1, 1987 |
| Grant date | Jul 10, 1990 |
| Priority date | — |
| Expiry date | Dec 1, 2007 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16J3/06
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A unitary piston cap and boot seal for use in a medication infustion system is disclosed which is mounted on a rigid piston contained in a cylinder disposed in a cassette. The piston cap and boot seal, which are made of a flexible, elastomeric material, effectively both form the pumping element disposed in the cylinder, and prevent contamination of the pump through use of a rolling seal. The device may be sterilized by gas, since a tortuous path affording passage to gas is included in the retaining skirt mounted around the outer diameter of the pump cylinder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.