Pressure gauge with digital stepping motor and reusable transfer plug
US6394977B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 25, 1998 |
| Grant date | May 28, 2002 |
| Priority date | — |
| Expiry date | Mar 25, 2018 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M25/10187
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A pressure gauge for displaying the magnitude of fluid pressure generated within a syringe or another pressurized system. The pressure gauge is removably attachable to a syringe, and may be sterilized for reuse after each medical procedure. A piezoresistive transducer senses fluid pressure and generates an electrical signal that changes in response to changes in said fluid pressure. The electrical signal is converts d to digital signals by a microprocessor. A stepper motor responds to the digital signals to control a pointer that moves across a dial to display the magnitude of the fluid pressure. A small lithium battery that can withstand high temperatures supplies electrical power to the pressure gauge. A housing unit, comprising stainless steel and a transparent window, encases the components of the pressure gauge. After use, the pressure gauge is placed in an autoclave, thereby sterilizing the pressure gauge for reuse.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.