Electromagnetic door holder apparatus
US5741034A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 2, 1995 |
| Grant date | Apr 21, 1998 |
| Priority date | — |
| Expiry date | Oct 2, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T292/65
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A door holder assembly for use with an associated electromagnet and an associated door having a pneumatic or hydraulic door closer mechanism mounted thereon which includes an elongated body having first and second axial portions. The apparatus includes a threaded member coupled to the first axial portion and to the second axial portion, the threaded member is coupled to one of the axial portions by mating threaded surfaces whereby relative rotation of the first and second axial portions varies the combined axial extent of the elongated body. The assembly further including a plate at one end of the elongated body and a base at the other end of the elongated body, the base and the plate are each mounted on the elongated body by means that allows relative angular movement therebetween. In some forms of the invention the first and second axial portions are disposed in telescoping relationship and each of the axial portions are cylindrical. In other embodiments of the invention the first and second axial portions are axially spaced at all times. In such forms of the invention the threaded member is a rod having external threads and each of the first and second axial portions have intern…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.