HEIGHT ADJUSTABLE STAND UP DESK
An adjustable stand up desk includes a desk top; a desk base; leg assembly coupled to the desk top and the desk base; and an assisted lift mechanism. The assisted lift mechanism includes a gas spring coupled to the desk top and the leg assembly that assists in lifting and damping a first portion of travel of the desk top, and a spring device external to and in concentric alignment with the gas spring and sized and positioned to dampen a fall and assist a lift during a second portion of travel of the desk top.
This claims the benefit of U.S. Provisional Patent Application No. 62/163,670 filed May 19, 2015, now pending, entitled “An Adjustable Stand Up Desk Utilizing a Scissor-Lift System,” which is hereby incorporated by reference.
BACKGROUNDSitting for long periods of time negatively impacts quality of life for many people. Poor posture and existing back injuries can make sitting painful. Recent studies have shown that sitting most of the day decreases human lifespan by two to three years.
The majority of standing desks require the customer to replace their current desk. Many customers are unwilling or unable to do this, especially if they work in a cubicle where removing the desk is not an option.
Existing desktop stand up desks do not offer a sufficient range of height adjustment to be ergonomic for the majority of the population, and several are not adjustable.
Existing standing desks also are prohibitively expensive for most of the population, leaving the health benefits of standing out of reach.
SUMMARYAn adjustable stand up desk includes a desk top; a desk base; a leg assembly coupled to the desk top and the desk base; and an assisted lift mechanism. The assisted lift mechanism includes a gas spring coupled to the desk top and the leg assembly that assists in lifting and damping a first portion of travel of the desk top, and a spring device external to and in concentric alignment with the gas spring and sized and positioned to dampen a fall and assist a lift of a second portion of travel of the desk top.
In an embodiment, the gas spring is triggered utilizing a pivotable handle. The force of the gas spring lifts the desk top to a desired height and dampens the fall of the desk top to an intermediate height or to a fully stowed, planar position.
In an embodiment, the adjustable stand up desk incorporates a secondary spring mechanism, which rides on the piston rod of the gas spring so as to control the drop and assist the lift of the desk top during a portion of its travel between an extended position and the fully stowed, planar position. The adjustable stand up desk also may include a removable limit bar that limits full collapse of the adjustable stand up desk.
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Claims
1. An adjustable stand up desk, comprising:
- a vertically-movable desk top;
- a desk base;
- a leg assembly coupled to the vertically-movable desk top and the desk base; and
- an assisted lift mechanism, comprising: a gas spring coupled to the vertically-movable desk top and the leg assembly that assists in lifting and damping a first portion of travel of the vertically-movable desk top, and a spring device external to and in concentric alignment with the gas spring and sized and positioned to dampen a fall and assist a lift of a second portion of travel of the vertically-movable desk top.
2. The desk of claim 1, wherein the gas spring comprises:
- a gas cylinder; and
- a gas push in rod, wherein the spring device is positioned and has a length such that the spring device is engaged when the vertically-movable desk top is within approximately 25 percent of a desk top stowed, planar position.
3. The desk of claim 2, wherein the spring device is free to move along a length of the push in rod.
4. The desk of claim 2, wherein the spring device is fixed at one end.
5. The desk of claim 1, wherein the spring device is a coil spring.
6. The desk of claim 1, further comprising a removable safety bar positioned to stop a fall of the vertically-movable desk top.
7. The desk of claim 1, wherein the leg assembly comprises a scissor lift assembly.
8. A height-adjustable desk, comprising:
- a desk top;
- a desk base;
- a scissors-lift leg assembly slidably and pivotably coupled to the desk top and the desk base;
- a first mechanism for extending the leg assembly from a stowed position to one of a plurality of extended positions and returning the an extended position to a stowed position, comprising: a differential pressure gas spring assembly, and a pivotable handle that actuates the gas spring assembly, and
- a second mechanism external to and in cooperation with the gas spring assembly that dampens a fall of the desk top to the stowed position and assists a lift of the desk top to the extended position; and
- a safety mechanism that limits the fall of the desk top to the stowed position.
9. The desk of claim 8, wherein the gas spring assembly comprises:
- a gas cylinder;
- a differential pressure piston installed within the gas cylinder; and
- a push in rod in connection with the piston, and wherein the second mechanism is in concentric free communication with the push in rod such that the second mechanism exerts a damping force on the gas cylinder during only the final 25 percent of the fall of the desk top.
10. The desk of claim 9, wherein the second mechanism comprises a coil spring.
11. The desk of claim 8, wherein the safety mechanism comprises:
- loops affixed to two legs of the leg assembly; and
- a removable bar inserted through the loops.
12. The desk of claim 8, wherein the desk top comprises a unitary surface.
13. A portable, height-adjustable stand up desk, comprising:
- a desk top;
- a desk base;
- a leg assembly slidably and pivotably coupled to the desk top and the desk base;
- a desk top lift mechanism for extending the leg assembly from a fully stowed, planar position to one of a plurality of extended positions and returning the leg assembly from an extended position to the fully stowed, planar position, comprising: a differential pressure gas spring assembly, a pivotable handle that actuates the gas spring assembly, and a spring mechanism external to and in cooperation with the gas spring assembly that dampens a fall of the desk top to the stowed position and assists a lift of the desk top to the extended position.
14. The desk of claim 13, further comprising a safety mechanism that limits the fall of the desk top to the stowed position.
15. The desk of claim 13, wherein the gas spring comprises:
- a gas cylinder; and
- a push in rod, wherein the spring mechanism has a length such that the spring mechanism is engaged when the desk top is within approximately 25 percent of the desk top fully stowed, planar position.
16. The desk of claim 15, wherein the spring device is free to move along a length of the push in rod.
17. The desk of claim 13, wherein the leg assembly comprises a scissor lift assembly.
18. A portable desk having a height-adjustable desk top, comprising:
- an extendible leg assembly coupled to the desk top; and
- a lift mechanism that extends the leg assembly from a fully stowed, planar position to one of a plurality of extended positions and returns the leg assembly from an extended position to the fully stowed, planar position, comprising: a differential pressure gas spring assembly, a handle that actuates the gas spring assembly, and a spring mechanism external to and in cooperation with the gas spring assembly that dampens a fall of the desk top to the fully stowed, planar position and assists a lift of the desk top to the extended position.
19. The portable desk of claim 18, further comprising a desk base, wherein the extendible leg assembly is coupled to the desk base.
20. The portable desk of claim 18, wherein the gas spring assembly comprises:
- a gas cylinder; and
- a push in rod, wherein the spring mechanism is positioned and has a length such that the spring mechanism is engaged when the desk top is within approximately 25 percent of the fully stowed, planar position.
Type: Application
Filed: Apr 5, 2016
Publication Date: Nov 24, 2016
Inventor: Dayna Martin (Vienna, VA)
Application Number: 15/090,915