Extension gate for trolley

Patent metadata

Field	Value
Publication number	US-11780485-B2
Application number	US-202117489858-A
Country	US
Kind code	B2
Filing date	Sep 30, 2021
Priority date	Apr 30, 2019
Publication date	Oct 10, 2023
Grant date	Oct 10, 2023

Abstract

A trolley configured for use to carry folding tables of a variety of sizes. The trolley includes a loading end, a trolley frame, and an extension gate adjustably connected to the trolley frame so as to be adjustable relative to the loading end of the trolley in a length direction of the trolley. The extension gate includes an elongate member slidingly disposed on the trolley frame and a rotatable portion that is foldable relative to the elongate member and lockable in an upright position by a lock. The rotatable portion may be positioned in an extended position from the loading end of the trolley, in a retracted position adjacent the loading end of the trolley, and in positions that are intermediate to the extended position and the retracted position. The elongate member may slide in a first direction to extend the rotatable portion away from the loading end of the trolley and in a second direction to retract the rotatable portion toward the loading end of the trolley.

First claim

The invention claimed is:

1. A trolley configured for use to carry folding tables of a variety of sizes, the trolley comprising:
a loading end located at a front of the trolley;
a trolley frame having a plurality of wheels located on a bottom portion of the trolley frame, with at least one of the plurality of the wheels being located on the trolley frame proximate a front of the trolley frame proximate the front of the trolley; and
an extension gate adjustably connected to the front of the trolley frame so as to be adjustable relative to the loading end of the trolley in a length direction of the trolley, the extension gate including:
an elongate member slidingly disposed on the trolley frame to slide relative to the trolley frame and the wheels on the trolley frame; and
a rotatable portion foldable relative to the elongate member and lockable in an upright position by a lock and foldable forward from the upright position to serve as a ramp, wherein the rotatable portion may be positioned in an extended position from the loading end of the trolley, in a retracted position adjacent the loading end of the trolley, and in positions intermediate to the extended position and the retracted position,
wherein the elongate member may slide in a first direction to extend the rotatable portion away from the loading end of the trolley and in a second direction to retract the rotatable portion toward the loading end of the trolley.

2. The trolley of claim 1 , further comprising an adjustable load support removably positionable to stabilize goods loaded on the trolley when the goods do not substantially span a width of the trolley, the adjustable load support comprising:
a pair of cross members mounted across the width of the trolley and spaced apart from one another, each cross member having a plurality of receivers; and
an adjustably positionable stabilizer having one end selectively positionable into the receivers of one of the cross members and an opposite end selectively positionable into the receivers of the other one of the cross members to vertically position the stabilizer on the trolley.

3. The trolley of claim 1 , wherein the trolley frame includes a tubular side member and the elongate member of the extension gate is slidingly received by the tubular side member.

4. The trolley of claim 3 , further comprising a gate adjuster mounted on the tubular side member by a mount adjacent an aperture formed through the tubular side member, the gate adjuster having a cam rotatably and eccentrically mounted to the mount, wherein the cam is rotatable to a first orientation to extend through the aperture and be in locking contact with the elongate member and is rotatable to a second orientation to not be in locking contact with the elongate member.

5. The trolley of claim 1 , wherein the trolley includes a floor having a planar central portion bounded on each side by angled ramp portions which terminate at elevated flat portions.

6. The trolley of claim 1 , wherein the trolley frame includes a pair of tubular side members and the extension gate includes a pair of elongate members, each slidingly received by one of the tubular side members.

7. The trolley of claim 6 , wherein the rotatable portion includes depending legs and the extension gate includes gate mounts located on the elongate members to which the depending legs of the rotatable portion are pivotally mounted.

8. The trolley of claim 7 , wherein the lock comprises a pair of lateral arms aligned end to end, wherein the lateral arms may be extended away from one another to lockingly engage the depending legs of the rotatable portion to lock the rotatable portion in the upright position and retracted toward one another out of engagement with the depending legs to unlock the rotatable portion.

9. The trolley of claim 8 , wherein the lateral arms include lock pins at their distal ends and the depending legs include passages which receive the lock pins when the lateral arms are lockingly engaged with the depending legs.

10. The trolley of claim 9 , wherein the mounts include passages through which the lock pins of the lateral arms pass when the lateral arms are lockingly engaged with the depending legs.

11. The trolley of claim 10 , further comprising a bias member located between the lateral arms and configured to urge the lateral arms away from one another.

12. The trolley of claim 11 , further comprising levers located on the lateral arms which may be manipulated by a user to overcome the bias member and urge the lateral arms toward one another.

13. The trolley of claim 12 , further comprising an enclosure located to enclose the lateral arms and out of which the lock pins extend when the lateral arms are lockingly engaged with the depending legs.

14. The trolley of claim 13 , wherein the trolley includes a floor having a planar central portion bounded on each side by angled ramp portions which terminate at elevated flat portions, wherein the enclosure has an upper surface that is at a height at or below the elevated flat portions.

Assignees

• Zhuhai Shichang Metals Ltd

Inventors

• Yu Hai
• Wang Che-Jen

Classifications

• B62B3/025 Primary

  Foldable roll containers · CPC title

• B62B3/108

  the objects being plates, doors, panels, or the like · CPC title

• B62B2202/80

  Household appliances, e.g. bath tubs, toilets or radiators · CPC title

• B62B2203/60

  Positioning, means on a cart for loads · CPC title

• B62B2206/02

  adjustable in length or width · CPC title