Electrical equipment housing with a movable door covering a keypad and having a pushbutton for operating a key when the keypad is covered by the door
US5552956A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 12, 1994 |
| Grant date | Sep 3, 1996 |
| Priority date | — |
| Expiry date | Aug 12, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H21/22
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A housing for electrical equipment such as an electronic thermostat has a panel in which is a keypad having a number of keys for manual entry of data, and a cover which can be moved into position to cover the keypad. The cover includes a pushrod which passes through a hole in the cover which is aligned with one of the keys while the cover covers the keypad. The pushrod is supported by a support arm assembly mounted on the cover surface at preselected mounting points and having a brace arm arranged to reduce stress on the mounting points and reduce friction and binding during operation. The topology of the pushrod, support arm assembly, cover, and a stop integral with the cover and which limits travel of the pushrod, cooperate to allow the pushrod and support arm assembly to be an integral unit and yet to be assembled to form the complete cover.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.