Telescoping strut construction
US3945744A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 23, 1974 |
| Grant date | Mar 23, 1976 |
| Priority date | — |
| Expiry date | Sep 23, 1994 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T403/7007
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An extendable and collapsible telescoping strut construction comprising inner and outer tubular members adapted to be slidably received in one another. The inner member is provided with rolled-in portions constituting annular locking grooves, respectively. The outer member has radially extending slots to receive locking dogs which are advanceable toward the inner member so as to engage various annular grooves thereof one at a time and thus hold the inner member in predetermined, fixed positions with respect to the outer member. The latter further carries a spring-biased, slidable collar member which retains the locking dogs in positions of engagement with any one of the annular grooves. Positive, cooperable locking means on the collar member and on the outer tubular member are provided for retaining these two parts in a predetermined, fixed position against accidental bumping or jarring, whereby the locking dogs are firmly held in their advanced, locked positions. The arrangement is such that the spring automatically advances the collar member to its locked position with respect to the outer tubular member as soon as the collar member is released.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.