Mechanism for closing a lid
US5507070A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 31, 1994 |
| Grant date | Apr 16, 1996 |
| Priority date | — |
| Expiry date | Aug 31, 2014 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE05Y2201/264
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A mechanism for controlling the opening and closing of a closure object, comprising an outer cylinder whose inner chamber, contains hydraulic fluid, a distal end of the outer cylinder being attachable to either a closure object or an object to be closed. A circumferential single groove is located in an inner wall of the outer cylinder and a piston shaft telescopically received within the outer cylinder extends proximally therefrom, being attachable to either a closure object or an object to be closed, and distally into the inner chamber. A piston head is mounted distally on the piston shaft. The piston head contains a bore therethrough, a peripherally located circumferential retaining groove, and an inclined outer surface which increases in cross section in the distal direction. A seal prevents hydraulic fluid from passing around the piston head between the distal chamber and the proximal chamber. A snap ring, partially housed within the single groove, engages the inclined outer surface of the piston head. A retainer is mounted proximate the distal end of the piston shaft and a valve plate, with an orifice extending therethrough, is slideably mounted on the piston shaft between it …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.