Counter-balanced load carriers
US5697757A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 1, 1995 |
| Grant date | Dec 16, 1997 |
| Priority date | — |
| Expiry date | Jun 1, 2015 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16M2200/063
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
The disclosure relates to a counter-balanced load carrier comprising a multi-stage telescopic arm (10). One stage (24) adjacent one end of the arm is mounted for rotation about a horizontal axis (29) in a carrier (17,21) mounted for rotation by a vertical axis (20) on a mobile base (11). The adjacent end stage (23) of the arm carries a counterweight and the end stage (28) at the other end of the arm carries a support (32) for a TV or video camera. The respective stages of the arm are interconnected by a cable or like mechanism to extend and retract together maintaining a fixed ratio between the radius of the payload support and the horizontal axis and the counterweight and the horizontal axis so that the arm remains counterbalanced throughout its range of extension and retraction. The cable mechanism also acts on the camera support on said end section of the arm to maintain the support horizontal throughout the range of tilting of the arm. An additional counterbalancing force can be applied at control point (39) on end stage (23) the control point being constrained to move in a vertical guideway (38) located on a horizontally moveable carriage (36) to follow the vertical/horizontal…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.