Ventilator grill and method for assembling the same
US4702156A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 18, 1985 |
| Grant date | Oct 27, 1987 |
| Priority date | — |
| Expiry date | Nov 18, 2005 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C2045/14762
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A ventilator grill comprises an outer frame made of synthetic resin having an inlet opening and outlet opening, at least one stationary vane extending across an interior of the outer frame, a plurality of through holes provided in each half of the outer frame, arcuate recess provided in an end face of the respective stationary vane, which opposes the inlet opening of the outer frame, and which has a circular arc, and at least one movable vane extending across the stationary vane, which is provided at opposite sides thereof in opposing side walls of the halves of the outer frame with journal shafts received within the through holes for permitting the movable vane to swing about an axis of swing extending through a center of the circular arc of the arcuate recess, and which is provided at one end portion thereof toward the inlet opening of the outer frame with a portion which is in sliding contact with the arcuate recess.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.