Extensible and retractable strut with safety latch
US4362415A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 31, 1981 |
| Grant date | Dec 7, 1982 |
| Priority date | — |
| Expiry date | Mar 31, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T403/604
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An extensible and retractable strut comprising telescoping pairs of members the outer of which carries a manually operable collar that is slideable between locking and unlocking positions. The collar carries a manually-releasable pivoted locking lever having an offset end that can be received in an opening of the outer member to lock the strut in adjusted position against release when the collar is in its locking position. When the collar is in the unlocking position, the offset portion of the lever is out of registration with the opening and instead bears against the exterior of the outer member. For such circumstance the members are relatively moveable between their extended and retracted positions. A keying means carried by the collar is engageable with cooperable means on the outer member to maintain the collar in a given aligning position. A biasing spring acting on the locking lever urges the offset portion thereof continuously either into engagement with the outer surface of the outer member or else in the opening thereof. When the offset portion of the locking lever is in the opening and the strut is fully extended, the lever acts as a safety device since it extends past th…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.