Hatch cover
US4928615A · kind A · utility
Inventor
Key dates
| Filing date | Mar 27, 1989 |
| Grant date | May 29, 1990 |
| Priority date | — |
| Expiry date | Mar 27, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T292/202
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A cover for a hatch which will engage with a rim to produce a water tight seal. The hatch cover includes a plate capable of seating in the rim and a shaft extending vertically through an aperture in the plate and slidably received therein. A handle is located on one side of the plate, one end of the handle pivotally connected to the shaft so that the handle will move from a closed position parallel to the plate to an open position substantially perpendicular to the plate. The handle imparts vertical movement to the shaft with respect to the plate. Arm assemblies extend radially outward from the shaft on the side of the plate opposite the handle, whereby movement of the handle imparts movement to the arm assemblies thereby extending the arm assemblies to engage the rim.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.