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US 4,928,834 AGranted
Safety beam lock
AssigneeVesper Corporation
InventorRichard D. Neiman
Life of this patent
Estimating the term…
Abstract
A safety lock for securing the end of a horizontal beam to a vertical post in a structural frame for wide span shelving. A tab on the end of the beam forces the side of an open box-shape post with slots in the side to yield during assembly of the beam to the post. When the tab enters a slot on the post side, the side springs back, locking the tab in the slot to prevent the dislodgment of the beam from the post.
Claims9
In a metal structural frame for shelving having
- (1) upright posts
- (a) of open box construction in cross section with
- (b) a front face and sides extending from the front face, and
- (c) spaced vertical slots in the front face;
- and
- (2) horizontal beams having
- (a) a plate at the end of a beam, and
- (b) lugs extending from the plate in a direction generally transverse to the beam;
- wherein a beam is connected to a post by engaging the lugs in the slots;
- the improvement comprising
- a safety lock for preventing dislodgment of the beam from the post, having
- (1) vertically spaced slots in the post sides,
- (2) a tab projection at the end of the beam extending from the plate for
- (a) causing the post side to yield inwardly during engagement of the beam lugs into the post front face slots, and
- (b) entering a slot on the post side when the lugs are fully engaged in the front face slots;
- wherein the post side springs back outwardly, locking the tab projection in the post side slot, thus preventing the lugs from being disengaged from the post front face slot, and from being dislodged from the post.
13 more elements
Dependencies are inferred from the claim text.