IP Library Granted Patent US 12,653,303
Granted Patent B2
US 12,653,303 · App. 18/629,924 · Granted Jun 16, 2026

Tray with under-mattress mount

Inventors: Cody Ryan Hirstein (Eureka, IL); Brandon Kaeb (Gridley, IL)
Assignee: CKnapp Sales, Inc.
A47B23/025
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Quick Facts
Patent No.
US 12,653,303
App. No.
18/629,924
Granted
Jun 16, 2026
Kind
B2
Abstract

A tray assembly for use with a bed includes a planar support configured to extend under a mattress of the bed, an upright post connected to the planar support, an arm connected to the upright post, and a worksurface platform mounted to an end of the arm opposite the upright post, wherein the arm provides an adjustable spacing between the upright post and the worksurface platform.

Claims (34)

1 . A tray assembly for use with a bed, comprising:

a planar support configured to extend under a mattress of the bed;

an upright post connected to the planar support;

an arm connected to the upright post and configured to extend laterally over the planar support; and

a worksurface platform mounted to an end of the arm opposite the upright post,

wherein the worksurface platform is selectively tiltable about the arm while the arm remains in a lateral position over the planar support, and

wherein the arm provides an adjustable spacing between the upright post and the worksurface platform, and

wherein the worksurface platform is mounted at a selectable position along the arm with a compression mount to secure a selected spacing between the upright post and the worksurface platform and a selected tilt angle for the worksurface platform.

2 . The tray assembly of claim 1 , wherein the upright post includes multiple nesting poles and one or more friction collars to set an adjustable height.

3 . The tray assembly of claim 1 , wherein the arm is a multi-segment arm including horizontal pivots between each segment.

4 . The tray assembly of claim 3 , wherein the multi-segment arm comprises three segments.

5 . The tray assembly of claim 1 , wherein the planar support includes a looped tubular frame.

6 . The tray assembly of claim 1 , wherein the worksurface platform is configured to hold a laptop or tablet.

7 . The tray assembly of claim 1 , wherein the arm is pivotably connected to the upright post, allowing the worksurface platform to be positioned at various angles relative to the upright post, with the arm remaining in a lateral orientation relative to the upright post.

8 . The tray assembly of claim 7 , wherein the arm is rotatable around the upright post while remaining in the lateral orientation relative to the upright post.

9 . The tray assembly of claim 7 , wherein the arm provides an adjustable spacing between the upright post and the worksurface platform.

10 . The tray assembly of claim 7 , wherein the arm is a multi-segment arm including horizontal pivots between each segment.

11 . The tray assembly of claim 1 , wherein the compression mount includes a locking mechanism to secure the selected spacing between the upright post and the worksurface platform and the selected tilt angle for the worksurface platform.

12 . The tray assembly of claim 1 , wherein the upright post is equipped with a locking mechanism to prevent unintended height adjustments.

13 . The tray assembly of claim 12 , wherein the locking mechanism includes a locking collar that can be engaged or disengaged by twisting.

14 . The tray assembly of claim 1 , wherein the upright post includes a telescopic locking mechanism with incremental height settings.

15 . The tray assembly of claim 1 , wherein the worksurface platform is adjustable in tilt for ergonomic positioning.

16 . The tray assembly of claim 1 , wherein the planar support includes a strap to secure the planar support to a bed frame.

17 . The tray assembly of claim 1 , wherein the planar support includes a slip-resistant coating to enhance grip with the mattress.

18 . The tray assembly of claim 1 , wherein the planar support is designed with a low-profile to mitigate any impact on mattress comfort.

19 . The tray assembly of claim 1 , wherein the worksurface platform includes a non-slip surface to prevent items from sliding off.

20 . The tray assembly of claim 1 , further comprising a handle attached to a top of the upright post to assist a user in getting out of bed.

21 . The tray assembly of claim 20 , wherein the handle is selected from a group consisting of:

a T-handle;

a bent cane handle;

a looped handle; and

a ball handle.

22 . The tray assembly of claim 1 , wherein the upright post is detachable from the planar support.

23 . The tray assembly of claim 1 , further comprising a handle attached to a top of the upright post to assist a user in getting out of bed.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Apr 8, 2024
From: HIRSTEIN, CODY RYAN; KAEB, BRANDON
To: CKNAPP SALES, INC.
Reel/Frame 067039/0665 →
Continuity (1)
Related Publication 20250311845A1 · Oct 9, 2025
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