Adjustable friction hinge
US4490884A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 30, 1983 |
| Grant date | Jan 1, 1985 |
| Priority date | — |
| Expiry date | Jun 30, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S16/13
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An adjustable friction hinge assembly of thermoplastic material comprises a first hinge leaf having spaced apart non-adjustable knuckles having non-circular through holes, and a second hinge leaf having a single knuckle which fits into the space between the spaced-apart non-adjustable knuckles. The hinge pin has non-circular portions which are received with the corresponding non-circular through holes of said spaced-apart knuckles, and which prevent rotation of said hinge pin in said knuckles. The inside diameter of the middle knuckle is adjustable by an adjustment screw, thereby to control the frictional torque resistance of the knuckle on the hinge pin. Provision is made for squeezing some of the plastic material into the threads of said adjustment screw, thereby to maintain the adjustment at its initially set position despite repeated openings and closings of the hinged door, cover or lid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.