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US 5,067,589 AGranted
Extendable support
AssigneeR. D. Werner Co., Inc.
InventorFrederick J. Bartnicki
Life of this patent
Estimating the term…
Abstract
A support having two support sections slidably engaged with each other includes a lock that can be used to releasably fix the size of the support surface defined by the support sections. The lock is mounted to one of the support sections and includes a shaft that can be received by any of the series of openings defined by the remaining support section. When the shaft is located within an opening, the positions of the support sections relative to each other are fixed, and the support surface will remain stable during use.
Claims7
A support comprising:
- a pair of support section movably engaged with each other;
- a support surface defined by said support sections, movement of said support sections relative to each other causing adjustment to the size of said support surface;
- a lock for releasably fixing the size of said support surface by releasably fixing the position of said support sections with respect to each other, said lock is movable to a locked position and an unlocked position such that in the locked position, the lock fixes the support sections relative to each other and in the unlocked position, the lock allows the support sections to move relative to each other to adjust the size of said support surface;
- and
- means to releasably secure the lock in an unlocked position.
2 more elements
Dependencies are inferred from the claim text.