Vertically adjustable swivel support with lock for use with seat

Details Vertically adjustable swivel support with lock for use with seat Vertically adjustable swivel support with lock for use with seat

1991-10-07

1994-03-29

Cranmer, Laurie K.

Chairs and seats

Movable bottom

Bottom and back movable as a unit

29734422, A47C 106

Patent

active

052978494

ABSTRACT:
A swivel support for seating such as a boat chair, various vehicle seats and other types of chairs or seats which can swivel and be vertically elevated or lowered that includes a lock structure which will automatically lock the support in angularly adjusted position about a vertical axis when the support is lowered from its elevated position to its lowered position. Many boats are provided with chairs which can be elevated to provide occupants of the chair with a better position for fishing. Chairs of this type are conventionally capable of being swiveled or rotatable about a vertical axis to enable the occupant to assume different angular positions in relation to the gunwales of the boat for a more effective fishing position. The boat chair lock structure will automatically lock the boat chair against rotation or swivel movement when the boat chair is lowered such as when the boat is underway from one location to another. The lock structure for the chair includes components on the stationary base and the movable component of the chair which interengage in one of a plurality of selected positions about a vertical axis when the boat chair is lowered to lock the boat chair in the selected angular position automatically when the boat chair is lowered.

REFERENCES:
patent: 1275624 (1918-08-01), Sopwith
patent: 1789821 (1931-01-01), Leffingwell
patent: 2010290 (1935-08-01), Campbell
patent: 2242138 (1941-05-01), Mumo
patent: 2604925 (1952-07-01), Swift
patent: 3856252 (1974-12-01), Regis

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