Air motor assembly
US5074750A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 8, 1990 |
| Grant date | Dec 24, 1991 |
| Priority date | — |
| Expiry date | Jan 8, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S415/904
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An air motor assembly driven by compressed air for using pencil type handy grinder, comprising an outer jacket casing made of a synthetic resin to cover a metal-made cylindrical housing to house an air turbine cylinder having air jetting nozzles into the turbine rotor thereof and air discharging apertures at opposite side of the air jetting nozzles, the compressed air feeding passages provided along the axis to the air turbine cylinder and the discharged air exhausting passages provided in parallel with the air feeding passages, the feeding air control mechanism including an air valve tube with air communicating orifices and a flange shaped valve, an air controlling knob made of a synthetic resin having double cylindrical structure consisting of an inner cylindrical body and an outer cylindrical body which is to be inserted into the enlarged portion of the outer jacket casing to form the discharged air exhausting passage between the inner and outer cylindrical bodies, and a noise silencing baffler made of a fibrous material having a thick cylinder shape provided in the discharged air exhausting passage, whereby it can provide a thermally insulated and noiseless type air motor assem…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.