Dashpot for either push or pull damping
US3939947A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 19, 1974 |
| Grant date | Feb 24, 1976 |
| Priority date | — |
| Expiry date | Aug 19, 1994 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/5196
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A dashpot is disclosed which can exhibit either push or pull damping depending upon the orientation of the valve members thereof. The dashpot includes a cylinder, a piston sealingly slidable within the cylinder and a piston rod operatively connected to the piston to move same. The piston is provided with a fluid flow channel which extends therethrough. A first valve member is operatively connected to the piston rod for movement therewith. A second valve member is mounted on said piston and has a fluid passage which communicates with the fluid flow channel of the piston. The first valve member is received within the second valve member in either a first or a second orientation relative thereto, thereby defining the direction of the damping force. The first and second valve members have parts which are operative, when force is applied to the piston rod in one axial direction or the other, to close or open the fluid passage respectively. One relative orientation of the valve members closes the fluid passage when the piston rod is urged in one axial direction and the other relative orientation of the valve members closes the fluid passage when the piston rod is urged in the other direc…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.