Hypodermic needle and method of making needles
US4383530A · kind A · utility
Inventor
Key dates
| Filing date | Jun 5, 1981 |
| Grant date | May 17, 1983 |
| Priority date | — |
| Expiry date | Jun 5, 2001 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2205/195
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A needle structure for hypodermic needles and the like, and method of making a needle, includes forming the beveled, sharply pointed free end of a thin, hollow needle tube so that the leading tip at the beveled end shields, at least partially, the hollow central portion of the needle tube. Advantageously, a portion of the needle tube behind the needle point diverges relatively slightly from the remainder of the needle tube so as to orient the leading tip at a slight angle with respect to the remainder of the needle tube such that it covers at least a portion of the hollow needle tube. As preferably embodied, the divergent portion is formed as a slightly arcuate segment in the needle tube ust behind the needle point, which can resemble a bulge-like formation in the needle tube. Alternatively, the needle tube can be formed with a single bend to lower the point of the needle leading tip. In a particularly useful embodiment, the present invention can be a relatively large diameter (e.g., about 0.045") needle for use in coronary assist procedures, with a helio coid conductor wire already located within the hollow needle tube.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.