Adjustable telescopic apparatus
US5014966A · kind A · utility
Inventor
Key dates
| Filing date | Oct 27, 1989 |
| Grant date | May 14, 1991 |
| Priority date | — |
| Expiry date | Oct 27, 2009 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16F9/443
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An adjustable telescopic apparatus includes: a master pipe body with an axle opening at one end and a pivot opening at the other end; an operating member adjustably installed in the pivot opening of the master pipe body; a slave pipe body with a closed end and an open end movably disposed in the master pipe body with the closed end extending out from the axis opening of the master pipe body; a throttle member with a piston portion and a plurality of hermetic pieces installed at the open end of the slave pipe body for dividing said master pipe body into an oil containing portion to be filled with hydraulic oil and an air space portion over the piston portion of the throttle member; and a valve member with a threaded body portion installed in the piston portion of the throttle member for being movably adjusted along with the operating member so as to allow the hydraulic oil in the master pipe body to be compressed and expanded therein through the throttle member; whereby, the moving speed and the force required to collapse the slave pipe body into the master pipe body can be optionally adjusted for obtaining desired telescopic operations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.