At a glance
| Patent number | CN205696818U (application CN201620221003) |
| Type | China utility model (实用新型) - protects product shape and structure |
| Original title | A kind of scalable sponge matress (一种可调节海绵床垫) |
| Patent owner | Shuford Intelligent Technology Zhejiang Co ltd |
| Inventors | Fu Wei, Zha Xin |
| Filing date | 2016-03-22 |
| Grant date | 2016-11-23 |
| Status (China) | Lapsed - terminated for non-payment of annual fees (recorded 2025-03-18) |
| Patent family | Chinese filings only - CN205696818U |
| Cited by | 7 later documents |
| Source | Google Patents (search for CN205696818U) |
What the claims cover, in plain language
Claim 1 describes a scalable sponge mattress comprising a mattress body divided into a shoulder-back zone, a waist-hip zone, and a leg zone. An embedding groove A is formed inward in the mattress body at the shoulder-back zone, and an embedding groove B is formed inward at the waist-hip zone. Sponge block A and sponge block C, which are identical in size and coordinated with groove A, are inlaid in groove A. Sponge block B and sponge block D, identical in size and coordinated with groove B, are inlaid in groove B. Both embedding groove A and embedding groove B extend transversely entirely through the mattress body.
Claim 2 adds that the mattress body at the leg section zone is provided with a plurality of anti-slip grooves.
Claim 3 adds that air vents are provided within the mattress body.
This is a simplified reading for orientation only. The legal scope is defined by the exact claim wording in the official Chinese document.
What this means for US production
This patent was filed only in China and is lapsed, so it no longer restricts anyone in China either. It has no US or other foreign counterpart.
Two points to settle early:
- Other patents may exist. Adjustable and zoned foam mattresses are a crowded field. Notably, Keeson Technology Corporation Limited holds later foreign filings citing this document (e.g., WO2018103068A1), indicating ongoing patent activity by other companies in smart and adjustable bedding. A freedom-to-operate (FTO) review covering transverse insert grooves and modular foam zoning is necessary before tooling.
- Foam density and block tolerances. The dimensions of the transverse grooves and the sponge blocks must be set in design and confirmed on prototypes so the blocks stay securely inlaid without shifting during sleep, yet remain easy to pull out by hand.
Customization and manufacturing
What can be customized
| Area | Options |
|---|---|
| Overall dimensions | Twin, Full, Queen, King, and custom lengths/widths to be confirmed in design |
| Base foam density | Various polyurethane sponge densities for the main mattress body |
| Insert blocks | Multiple ILD (Indentation Load Deflection) options for blocks A, B, C, and D |
| Cover material | Removable zippered covers in polyester, cotton blends, or bamboo fabric |
| Groove placement | Exact position of shoulder-back and waist-hip zones adjusted to target demographics |
| Ventilation | Number and diameter of air vents set in design |
Things to plan for (US market)
- CPSC 16 CFR Part 1632 and 1633 - flammability standards for mattresses and mattress pads sold in the US; all foam and cover materials must pass open flame and cigarette smolder tests.
- CertiPUR-US - while voluntary, most US Amazon sellers and retailers require this certification to prove the foam is made without prohibited chemicals and meets low VOC emission limits.
- California Prop 65 - foam chemicals and fabric treatments must be screened for listed substances.
How a project runs
- Inquiry - mattress sizes, target firmness range for the inserts, cover specifications, and quantity.
- Design - mapping the transverse groove positions relative to the mattress length, selecting base foam density, and defining the insert block sizes.
- Prototype - CNC cutting or molding sample bodies and blocks to test the fit, ease of manual swapping, and structural integrity when the grooves are empty or filled.
- Pilot run - producing a small batch for flammability pre-testing, compression rolling trials (if shipping in a box), and durability cycling.
- Production - large-scale foam pouring or block cutting, groove forming, assembly of inserts, cover sewing, and final packaging.
Quantities & timeline
Producing this mattress requires cutting dies or molding tools for the main body to form the transverse embedding grooves precisely, alongside separate cutting tools for the interchangeable sponge blocks A, B, C, and D. Flammability testing under 16 CFR 1633 involves burning complete mattress prototypes, which adds time to the development phase. Compression-rolling equipment is needed if the product will be shipped as a bed-in-a-box. Send us your target sizes, foam density preferences, insert firmness options, cover requirements, estimated quantities and target price and we will reply with options.
Patent drawings
Drawings reproduced from the public patent document for reference.
