Power door drive and door support having motor operated locks
US5341598A · kind A · utility
27Cited by
11References
18Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 8, 1992 |
| Grant date | Aug 30, 1994 |
| Priority date | — |
| Expiry date | May 8, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/19953
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Rotary locks used on transit vehicle doors when opened and closed by a rotating helical door drive member. In a preferred embodiment, a first lock utilizes a negative thread portion of the helical drive. A second lock utilizes a rotating lock pawl and stop. The drive and lock can be used to operate door systems with and without separate door hangers. Compensation for camber variations in car structure is provided through the use of spherical mounts or drive member journals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.