Adjustable friction hinge
US4630333A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 16, 1985 |
| Grant date | Dec 23, 1986 |
| Priority date | — |
| Expiry date | Dec 16, 2005 |
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 clamping knuckle which fits into the space between the spaced-apart non-adjustable knuckles. The hinge pin is a unitary pin having non-circular end portions having a diameter which is larger than that of the circular cross-section intermediate portion. The inside diameter of the middle knuckle as molded is too small to receive the non-circular end portion of the hinge pin. During assembly, the inside diameter of the middle knuckle is extended to receive the non-circular end portion of the hinge pin. The frictional torque resistance on the knuckle is controlled by the middle clamping knuckle which is controlled by an adjustment screw. Some of the plastic material of the clamping knuckle is squeezed into the threads of the adjustment screw during tightening thereby to maintain the adjustment at its initially-set position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.