Gas spring lift

Patent metadata

Field	Value
Publication number	US-9743754-B2
Application number	US-201615185678-A
Country	US
Kind code	B2
Filing date	Jun 17, 2016
Priority date	Jul 21, 2015
Publication date	Aug 29, 2017
Grant date	Aug 29, 2017

Abstract

A height adjustable device that can include: a work surface; and at least one leg assembly connected to the work surface, the at least one leg assembly including: a first member; and a second member moveable relative to the first member along a longitudinal axis; a counterbalance mechanism connected to the height adjustable device and configured to counteract a force exerted on the work surface, the counterbalance mechanism including: a gas spring having a cylinder and a moveable piston; a wheel moveably connected to the gas spring; and first tension member engaged to the wheel, the first tension member connected to the at least one leg assembly; a second tension member engaged to the wheel, the second tension member connected to the at least one leg assembly; and a guide member mounted inside of one of the first member and the second member, the guide member being slidably engaged with the cylinder.

First claim

What is clamed is:

1. A height adjustable device comprising:
a work surface; and
at least one leg assembly connected to the work surface, the at least one leg assembly including:
a first member;
a second member moveable relative to the first member along a longitudinal axis;
a counterbalance mechanism coupled to the at least one leg assembly and configured to counteract a force exerted on the work surface, the counterbalance mechanism including:
a gas spring having a cylinder and a moveable piston;
a wheel assembly moveably connected to the gas spring; and
a first tension member having a first end and a second end, the first tension member engaged to the wheel assembly, the first tension member connected to the at least one leg assembly, wherein the first end and the second end extend away from the wheel assembly in a first direction;
a second tension member having a third end and a fourth end, the second tension member engaged to the wheel assembly, the second tension member connected to the at least one leg assembly, wherein the third end and the fourth end extend away from the wheel assembly in a second direction that is opposite the first direction; and

a guide member mounted inside of one of the first member and the second member, the guide member being slidably engaged with the cylinder.

2. The height adjustable device of claim 1 , wherein the cylinder is configured to move within the at least one leg assembly when the moveable piston moves.

3. The height adjustable device of claim 1 , wherein the second member slides within the first member in a telescoping configuration.

4. The height adjustable device of claim 1 , further comprising a release mechanism configured to release the gas spring.

5. The height adjustable device of claim 4 , wherein the release mechanism includes a release bar having a middle section configured to coincide with a rotation axis.

6. The height adjustable device of claim 1 , wherein a distal end of the moveable piston is coupled to the work surface.

7. The height adjustable device of claim 1 , further comprising a third member moveable relative to the first member and the second member along the longitudinal axis.

8. The height adjustable device of claim 1 , wherein the guide member is mounted inside of the second member.

9. The height adjustable device of claim 1 , further comprising a wheeled base having a tapered cavity configured to receive the first member.

10. A height adjustable device comprising:
a work surface; and
at least one leg assembly connected to the work surface, the at least one leg assembly including:
a first member; and
a second member moveable relative to the first member along a longitudinal axis;
a counterbalance mechanism coupled to the at least one leg assembly and configured to counteract a force exerted on the work surface, the counterbalance mechanism including:
gas spring having a cylinder and a moveable piston;
a first wheel moveably connected to the gas spring;
a second wheel moveably connected to the gas spring; and
a first tension member having a first end and a second end, the first tension member engaged to the first wheel, the first tension member connected to the at least one leg assembly, wherein the first end and the second end extend away from the first wheel in a first direction;
a second tension member having a third end and a fourth end, the third end engaged to the second wheel, the second tension member connected to the at least one leg assembly, wherein the third end and the fourth end extend away from the second wheel in a second direction that is opposite the first direction; and

a guide member mounted inside of one of the first member and the second member, the guide member being slidably engaged with the cylinder.

11. The height adjustable device of claim 10 , wherein the first wheel and the second wheel rotate about a first axis.

12. The height adjustable device of claim 10 , wherein the first and second tension members are configured such that the first and second wheels rotate in the same direction when the second member moves.

13. The height adjustable device of claim 10 , wherein the first and second tension members are configured such that the first and second wheels rotate in opposite directions when the second member moves.

14. The height adjustable device of claim 10 , further comprising a release mechanism configured to release the gas spring.

15. The height adjustable device of claim 10 , wherein the release mechanism includes a release bar having a middle section configured to coincide with a rotation axis.

16. The height adjustable device of claim 10 , wherein a distal end of the moveable piston is coupled to the work surface.

17. The height adjustable device of claim 10 , further comprising a third member moveable relative to the first member and the second member along the longitudinal axis.

18. The height adjustably device of claim 10 , wherein the guide member is mounted inside of the second member.

19. The height adjustable device of claim 10 , wherein the second member slides within the first member in a telescoping configuration.

20. A height adjustable device comprising:
a work surface; and
at least one leg assembly connected to the work surface, the at least one leg assembly including:
a first member; and
a second member moveable relative to the first member along a longitudinal axis in a telescoping configuration;
a counterbalance mechanism coupled to the at least one leg assembly and configured to counteract a force exerted on the work surface, the counterbalance mechanism including:
a gas spring having a cylinder and a moveable piston, moveable piston coupled to the work surface;
a first wheel moveably connected to gas spring;
a second wheel moveably connected to the gas spring, wherein the first and second wheels rotate about a common axis;
a first tension member having a first end and a second end, the first tension member engaged to the first wheel, the first tension member connected to the at least one leg assembly, wherein the first end and the second end extend away from the first wheel in a first direction;
a second tension member having a third end and a fourth end, the second tension member engaged to the second wheel, the second tension member connected to the at least one leg assembly, wherein the third end and the fourth end extend away from the second wheel in a second direction that is opposite the first direction, wherein the first and second tension members are configured such that the first and second wheels rotate in opposite directions when the second member moves; and

a guide member mounted inside of one of the first member and the second member, the guide member being slidably engaged with the cylinder, wherein the cylinder is configured to move within the at least one leg assembly when the moveable piston moves.

Assignees

• Ergotron Inc

Inventors

• Ergun Mustafa A
• Cross Chelsea

Classifications

• A47B9/02 Primary

  with balancing device, e.g. by springs, by weight · CPC title

• A47B13/16

  Holders for glasses, ashtrays, lamps, candles or the like forming part of tables · CPC title

• A47B13/02

  Underframes · CPC title

• A47B13/023

  with a central column · CPC title

• A47B9/10

  with vertically-acting fluid cylinder · CPC title