Ladder with pinch flex latch, and method

Patent metadata

Field	Value
Publication number	US-10435947-B2
Application number	US-201715802949-A
Country	US
Kind code	B2
Filing date	Nov 3, 2017
Priority date	Dec 12, 2016
Publication date	Oct 8, 2019
Grant date	Oct 8, 2019

Abstract

A ladder having a front section and a rear section. The ladder has a step attached to the front section and a cross bar attached to the rear section. The ladder has a latch attached to the cross bar and positioned on the cross bar so when the ladder is in a folded position where the front section is alongside and in parallel with the rear section, the latch latches with the step. The latch has a hook portion having a hook which engages with the step that the latch holds in place. The latch has a base portion that is fixed to the cross bar. The latch has a pinch flex portion connected to the base portion and the hook portion.

First claim

The invention claimed is:

1. A ladder comprising:
a front section having a front right rail and a front left rail;
a rear section having a rear right rail and a rear left rail;
a step attached to the front right rail and front left rail; the step having a front flange and a rear flange and a center portion attached to and between the front flange and the rear flange; the rear flange further comprising a striker attached thereto;
a cross bar attached to the rear right rail and the rear left rail;
a latch attached to the cross bar and positioned on the cross bar so when the ladder is in a folded position where the front section is alongside and in parallel with the rear section, the latch latches with the striker on the rear flange of the step, the latch comprises:
a hook portion having a hook which engages with the striker to hold the latch in place;
a base portion that is fixed to the cross bar; and
a pinch flex portion connected to the base portion and the hook portion, when the pinch flex portion is compressed or pinch flexed downward to the base portion, the hook portion moves off of the striker on the rear flange of the step thus releasing the front section to move away from the rear section, when the front section is to be held or latched to the rear section, the striker is moved against a cam portion of the hook portion, pushing the hook portion back away from the step until the front section clears the hook of the hook portion, whereupon the hook portion no longer being restrained by the striker, under a force bias created in the pinch flex portion by the pinch flex portion being compressed, automatically moves back and catches or latches the striker on the step and thus the front section to the rear section without any spring or other component to create the force bias, the latch is one piece.

2. The ladder of claim 1 wherein the striker having a window for receiving the hook portion, the hook portion engages with the striker when the front and rear sections are in the closed position to hold the front and rear sections together.

3. The ladder of claim 2 wherein the striker having a Z shaped roof with a first slope portion, a straight stem connected to the first slope portion, the first sloped portion angled inwards from a bottom of the stem, and a second sloped portion connected to the stem and extending down from a top of the stem.

4. The ladder of claim 3 wherein the first and second sloped portions each having an angle that essentially conforms to an angle of a slope of a cam portion of the hook portion of the latch.

5. The ladder of claim 4 wherein the striker is one piece.

Assignees

• Parker Thomas W
• Lentine Tek
• Werner Co

Inventors

• Parker Thomas W
• Lentine Tek

Classifications

• E06C1/16 Primary

  with {hinged} struts which rest on the ground (with struts rigid with the ladder E06C1/24; having platforms E06C1/39) · CPC title

• E06C7/14

  Holders for pails or other equipment on or for ladders · CPC title

• E06C7/06

  Securing devices or hooks for parts of extensible ladders · CPC title

• E06C1/383 Primary

  Foldable ladders in which the longitudinal members are brought together on folding {(E06C9/085 takes precedence)} · CPC title

• E06C1/04

  Ladders for resting against objects, e.g. walls poles, trees (supports for ladder heads E06C7/48) · CPC title