Toroidal hydraulic actuator
US6253549A · kind A · utility
3Cited by
9References
6Claims
0Family size
Inventor
Key dates
| Filing date | Apr 26, 1999 |
| Grant date | Jul 3, 2001 |
| Priority date | — |
| Expiry date | Apr 26, 2019 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16D31/02
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A hydraulic actuator comprised of a toroidal piston within a toroidal enclosure, with differential fluid pressure alternatively applied to upper and lower surfaces of the piston to cause a reciprocating motion, and with plural double ended piston rods extending in parallel above and below the piston, and slidably extending in fluid sealed relation through end caps of the toroidal enclosure to distribute the vibrational force produced by the reciprocating piston over plural points of a surface area of the mass to be vibrated, thereby reducing the likelihood of stress, strain, or harmonics in the mass.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.