Capsule for medical use
US4239040A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 13, 1977 |
| Grant date | Dec 16, 1980 |
| Priority date | — |
| Expiry date | Oct 13, 1997 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M31/002
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A capsule for discharging drugs into a live body or collecting samples from the body comprises an external cylinder having slidably mounted therein an internal cylinder. The internal cylinder is retained by a meltable thread at one end of the external cylinder against the biasing force of a compression spring and upon melting of the thread, the spring effects sliding of the internal cylinder to the other end of the external cylinder and during this sliding movement, a drug is pushed out of the external cylinder ahead of the moving internal cylinder or a body sample is withdrawn into the external cylinder behind the moving internal cylinder. An electric circuit including a tunable receiver responds to an externally transmitted electric signal to energize a heater for melting the thread to thereby effect sliding movement of the internal cylinder at the desired time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.