At a glance
| Patent number | CN205290875U (application CN201620018317) |
| Type | China utility model (实用新型) - protects product shape and structure |
| Original title | Multifunctional wrench (一种多功能扳手) |
| Patent owners | Wucheng Power Supply Co. of State Grid Shandong Electric Power Co.; State Grid Corporation of China |
| Filing date | 2016-01-11 |
| Grant date | 2016-06-08 |
| Status (China) | Lapsed - terminated for non-payment of annual fees (effective 2017-01-11, recorded 2018-03-06) |
| Patent family | Only this Chinese patent - no US, European, Japanese, PCT or other filings listed |
| Cited by | 7 later documents, including one European application for a multi-tool |
| Source | Google Patents (search for CN205290875U) |
What the claims cover, in plain language
Claim 1 - a multifunctional wrench with a right, a left and a middle handle joined by a pivot. The right handle has a saw blade on one end with a movable cover and an open-end wrench on the other; the middle handle has a box-end wrench at one end and a bottle opener at the other; the left handle has a socket head with a hex hole at its front and a file plate on its side; all handles work with flat and Phillips screwdriver bits.
Claims 2-5 add: hex through-holes in the middle of each handle that fit the bits, with the bits also fitting the socket head’s hex hole, and the holes and bits magnetic; a slot on the right handle for the cover, with cover and slot magnetic; a stepped wrench on the right handle fitting four nut sizes; and a lock on the pivot connected to a wrist strap.
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 production
This patent was filed only in China, and it lapsed in 2017 because annual fees were not paid. It no longer restricts anyone - in China or elsewhere.
Before production, keep in mind:
- Multi-tools are a crowded, heavily patented field. Established brands hold many US utility and design patents on folding mechanisms, locks and tool layouts. Give your design its own look and have a freedom-to-operate (FTO) search done by a US patent attorney before volume production.
Customization and manufacturing
What can be customized
| Area | Options |
|---|---|
| Wrench sizes | SAE, metric or mixed; sizes matched to bikes, cars, furniture or a specific trade |
| Steel & finish | Chrome-vanadium or stainless steel; black oxide, satin, titanium-color coatings |
| Bits | Standard 1/4" hex bits - flat, Phillips, Torx or hex; extra bit storage |
| Tool selection | Keep, drop or swap the saw, file and bottle opener for a target market |
| Carry | Wrist strap, belt pouch, pocket clip, carabiner |
| Branding | Laser-engraved logo, custom handle color, gift box or blister pack |
Things to plan for (US market)
- Saw blade and knives - check retailer and travel rules for products with blades; some buyers prefer a blade-free version.
- Size markings - mark SAE / metric sizes clearly on each wrench.
- Strength - test wrenches and pivot under torque so the tool does not spread or slip.
How a project runs
- Inquiry - target users, wrench sizes, tool selection and quantity.
- Design - handle profiles, wrench openings, pivot and lock details.
- Samples - prototypes for fit, torque and folding tests.
- Pilot run - small batch with heat-treatment and finish checks.
- Production - volume production, engraving and packaging.
Quantities & timeline
The handles are stamped or fine-blanked and heat-treated; stamping dies are the main tooling. Send us your target quantity, size set and price point and we will reply with options.
Patent drawings
Drawings reproduced from the public patent document for reference.
