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US 5,845,589 AGranted
Folding table leg system
OwnerJoel W. Pfisterinventor
Life of this patent
Estimating the term…
Abstract
Folding table leg system for positive locking of a table leg in a down and locked position or for positive locking of a table leg in an up and locked position, where a spring loaded lever operated pawl automatically engages an extruded rotatable block member to achieve either an uplocked or downlocked position. A secondary safety lock is also provided. An alternate embodiment provides for a folding table leg system having a minimum of structural components which features primary tangential and wedge locking and secondary locking for massive load or violent shock load occurrence.
Claims4
A folding table leg system comprising:
- a. a locking base with a cross member and two opposing vertical members with planar bases, and including opposing lower pivot holes and opposing upper pivot holes;
- b. a geometrically configured latch member including a pivot pin at one end which engages into said lower pivot holes, a locking pawl in a mid-section, and an actuating tab at a second end;
- c. a spring means connecting between said locking base and said latch member and includes an angled edge with a rod for engaging under said cross member;
- and,
- d. a rotatable block member having at least three corners and opposing dowel pin pivots at a first corner, a downlock groove and an uplock groove at second and third opposing corners, and a threaded hole on a planar surface for table leg attachment whereby said rotatable block member rotates so as to allow the table leg to be locked in a positive parallel to the table when the pawl engages the uplock groove or a table supporting position when the pawl engages the downlock groove.
2 more elements
Dependencies are inferred from the claim text.