Calculus crushing apparatus
US4741335A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 9, 1987 |
| Grant date | May 3, 1988 |
| Priority date | — |
| Expiry date | Jan 9, 2007 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2017/2923
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A crushing apparatus has a flexible sheath which is adapted to be inserted into a body cavity with the aid of an endoscope. An operating wire longer than the sheath is slidably inserted into the sheath. A collapsible basket for seizing a calculus produced in a body cavity is coupled to the distal end of the operation wire and extends from the sheath. The proximal end of the sheath is connected to an operating section for sliding the operating wire to extend or contract the basket. The operating section includes a rack coupled to the operating wire and an operating handle connected to the rack through a speed reduction mechanism. The reduction mechanism decelerates and transmits an operative force, which is supplied to the handle, to the rack, thereby sliding the operating wire.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.