Pole grab and ladder including the same

Patent metadata

Field	Value
Publication number	US-10415311-B2
Application number	US-201715810590-A
Country	US
Kind code	B2
Filing date	Nov 13, 2017
Priority date	Nov 13, 2017
Publication date	Sep 17, 2019
Grant date	Sep 17, 2019

Abstract

A pole grab for use with a ladder, the pole grab including a base unit structured to attach between rails of the ladder such that the base unit can rotate between a stowed position and a deployed position, the base unit including at least one retractable latch mechanisms structured to extend and engage with at least one corresponding receiving point on at least one of the rails of the ladder to prevent rotation of the base unit and to retract and disengage with the at least one corresponding receiving point on the at least one of the rails of the ladder to allow rotation of the base unit, and an arm assembly attached to the base unit and including a pair of arms pivotally attached to corresponding pivot points spaced a predetermined distance apart from each other on the base unit, the pair of arms being structured to pivot between an open position and a closed position.

First claim

What is claimed is:

1. A pole grab for use with a ladder, the pole grab comprising:
a base unit structured to attach between rails of the ladder such that the base unit can rotate between a stowed position and a deployed position, the base unit including at least one retractable latch mechanism structured to extend and engage with at least one of the rails of the ladder to prevent rotation of the base unit and to retract and disengage with the at least one of the rails of the ladder to allow rotation of the base unit; and
an arm assembly attached to the base unit and including a pair of arms pivotally attached respectively to a pair of corresponding pivot points, said pivot points being spaced a predetermined distance apart from each other on the base unit, the pair of arms being structured to pivot between an open position and a closed position;
a push rod slidably attached to the base unit;
a push bar attached to the push rod and the pair of arms; and
a pair of arm springs attached to the pair of arms and being structured to bias the pair of arm towards the open position,
wherein the push rod is structured to move in unison with the push bar,
wherein moving the push bar toward the base unit causes the pair of arms to pivot toward the closed position,
wherein moving the push bar away from the base unit causes the pair of arms to pivot toward the open position, wherein forward and backward movement of the push bar results in a corresponding movement of the pair of arms along an entire range of movement of the push bar
wherein the push bar is a planar member having a pair of slotted openings,
wherein the pair of arms each include a connector member structured to pass through the corresponding slotted opening to attach the push bar and the pair of arms.

2. The pole grab of claim 1 , wherein the base unit further comprises:
a locking mechanism structured to receive the push bar and to selectively lock to prevent the push bar from moving away from the base unit.

3. The pole grab of claim 2 , wherein when the locking mechanism is locked, the push bar can be moved toward the base unit and cannot be moved away from the base unit; and wherein when the locking mechanism is unlocked, the push bar can be moved both toward and away from the base unit.

4. The pole grab of claim 3 , wherein the locking mechanism further comprises:
a lock composed of a bent member having a first portion, a second portion arranged substantially perpendicular with respect to the first portion, and an opening formed in the first portion and being structured to receive the push rod; and
a spring structured to bias the bent member toward the push bar to cause the locking mechanism to lock, and
wherein pulling the second portion of the bent member away from the push bar causes the locking mechanism to unlock.

5. The pole grab of claim 4 , further comprising:
a cord attached to the second portion of the bent member,
wherein pulling on the cord causes the locking mechanism to unlock.

6. The pole grab of claim 5 , wherein the cord is structured to extend out of the base unit and down one of the rails of the ladder.

7. The pole grab of claim 1 , wherein the at least one retractable latch mechanism includes:
an L-shaped member having a first end structured to extend and engage with the at least one rail of the ladder and a second end structured to extend through an opening in the base unit; and
a latch spring attached to the L-shaped member and being structured to bias the first end of the L-shaped member toward the at least one rail of the ladder, and
wherein pulling the second end of the L-shaped member in a direction away from the first end of the L-shaped member causes the first end of the L-shaped member to disengage with the at least one rail of the ladder.

8. The pole grab of claim 1 , wherein the at least one retractable latch mechanism is a pair of retractable latch mechanisms.

9. The pole grab of claim 1 , wherein when the pole grab is in the deployed position, the pair of arms extend from the base unit is a direction substantially perpendicular with respect to the rails of the ladder; and wherein when the pole grab is in the stowed position, the pair of arms extend downward between the rails of the ladder.

10. The pole grab of claim 9 , wherein when the pole grab is in the stowed position, the pole grab does not extend beyond the width of the rails of the ladder.

11. The pole grab of claim 1 , wherein the pair of arms are structured to grasp a pole by pivoting from the open position toward the closed position.

12. The pole grab of claim 11 , wherein the pole hash a diameter of at least 18 inches.

13. The pole grab of claim 1 , wherein the base unit further includes a pair of frame pivots structured to extend through the rails of the ladder and rotatably attach the base unit to the rails of the ladder.

14. A ladder comprising:
a pair of rails extending the height of the ladder; and
a pole grab including:
a base unit attached between the rails such that the base unit can rotate between a stowed position and a deployed position, the base unit including at least one retractable latch mechanism structured to extend and engage with at least one of the rails to prevent rotation of the base unit and to retract and disengage with the at least one of the rails to allow rotation of the base unit; and
an arm assembly attached to the base unit and including a pair of arms pivotally attached to corresponding pivot points spaced a predetermined distance apart from each other on the base unit, the pair of arms being structured to pivot between an open position and a closed position;
a push rod slidably attached to the base unit;
a push bar attached to the push rod and the pair of arms; and
a pair of arm springs attached to the pair of arms and being structured to bias the pair of arms toward the open position,

wherein the push rod is structured to move in unison with the push bar,
wherein moving the push bar toward the base unit causes the pair of arms to pivot toward the closed position,
wherein moving the push bar away from the base unit causes the pair of arms to pivot toward the open position, wherein forward and backward movement of the push bar results in a corresponding movement of the pair of arms along an entire range of movement of the push bar
wherein the push bar is a planar member having a pair of slotted openings,
wherein the pair of arms each include a connector member structured to pass through the corresponding slotted opening to attach the push bar and the pair of arms.

Assignees

• Werner Co

Inventors

• Parker Tom

Classifications

• F16B2/185

  using levers · CPC title

• F16B2/10

  using pivoting jaws · CPC title

• E06C7/48 Primary

  Ladder heads; Supports for heads of ladders for resting against objects {(ladders attachable to structures such as poles E06C1/34)} · CPC title

• E06C7/505

  Anchors being adapted to fix a ladder to a vertical structure, e.g. ladder hooks · CPC title

• E06C1/34

  Ladders attached to structures, such as windows, cornices, poles, or the like ({E06C9/12 takes precedence}; ladders permanently fastened to buildings E06C9/00, {e.g. climbing irons E06C9/04}) · CPC title