Patents
US 11338881 B2: Quick assembly bicycle stem structure
- Granted
- 2022-05-24
- Filed
- 2019-12-30 application 16730673
- Type
- Utility · 19 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
A quick assembly bicycle stem structure includes a front fork stem, a handlebar stem having a zigzag-shaped slot opening formed at a lower end thereof that is received in an upper section of the front fork stem, the zigzag-shaped slot opening including a first vertical slot and a second vertical slot that are spaced apart in relation to one another, a pin bolt coupled to the front fork stem and extending into the zigzag-shaped slot opening of the handlebar stem, the pin bolt configured to travel within the zigzag-shaped slot opening and to enter the second vertical slot from the first vertical slot when the front fork stem is rotated relative to the handlebar stem, and a nut assembly received over the handlebar stem and configured to threadedly engage the upper section of the front fork stem.
Source: PVGPATDIS, file of 2026-04-10 (ipg220524.xml).
Assignees
| Assignee | Type | Place | Also on furp.org | Source |
|---|---|---|---|---|
| Dynacraft BSC, Inc. 41 patents | US company or organization | Port Wentworth, GA | DYNACRAFT BSC, INC. State business registration EXACT high confidence: identical full name and state | PVGPATDIS, file of 2026-04-10 |
Inventors
| Inventor | Place | Patents | Person page | Source |
|---|---|---|---|---|
| Xie Xi Tang | Tianjin, CN | 1 | PVGPATDIS, file of 2026-04-10 |
CPC categories
| Subclass | Category | First group | Source |
|---|---|---|---|
| B62K | Cycles; cycle frames; cycle steering devices; rider-operated terminal controls specially adapted for cycles; cycle axle suspensions; cycle side-cars, forecars, or the like | B62K21/24 | PVGPATDIS, file of 2026-04-10 |
Cooperative Patent Classification, as currently assigned (one row per subclass).
Assignments and security interests
| Recorded | What | From | To | Reel/frame | Source |
|---|---|---|---|---|---|
| 2022-02-15 | Assignment Assignment of assignor's interest | TIANJIN TIGERBIKE CO., LTD. signed 2019-12-21 | DYNACRAFT BSC, INC. PORT WENTWORTH, GA | 59019/575 | ECORSEXC, file of 2026-09-25 |
| 2019-12-30 | Assignment Assignment of assignor's interest | TANG, XIE XI signed 2019-12-21 | DYNACRAFT BSC, INC. PORT WENTWORTH, GA | 51389/215 | ECORSEXC, file of 2026-09-25 |
Documents recorded with the USPTO Assignment Recordation Branch that list this patent. A security interest is a lender’s claim on the patent as collateral; a release ends it.
USPTO bulk data: PatentsView granted patents, disambiguated (PVGPATDIS) for patents, assignees, inventors, places and CPC categories; the USPTO Patent Assignment Dataset (ECORSEXC) for assignments and security interests. Patents filed in the last 20 years. No claims or full text. Links to other records are by name (and state): EXACT means the identical full name and state; FUZZY means a looser name match, with the confidence shown.