Rollator

• US 8,434,780 B2
• Filed: 09/14/2010
• Issued: 05/07/2013
• Est. Priority Date: 02/09/2010
• Status: Expired due to Fees

• Current Assignee: Genteel Homecare Products Co. Ltd.
• Original Assignee: Genteel Homecare Products Co. Ltd.
• Inventors: Li, Qingfeng
• Primary Examiner(s): OLSZEWSKI, JOHN
• Application Number:
  US12/881,511
• Publication Number:
  US 20110193305A1
• Time in Patent Office: 966 Days
• Field of Search: 280/638, 280/639, 280/651, 280/47.34, 280/47.35, 280/47.371, 280/47.41, 280/7.1, 280/7.15, 135/67, 135/74, 297/5, 297/6, 297/331
• US Class Current: 280/639
• CPC Class Codes: A61H 2003/002 with attached or incorporated article carrying means
• CPC Class Codes: A61H 2003/046 with braking means
• CPC Class Codes: A61H 2201/0161 Size reducing arrangements when not in use, for stowing or transport
• CPC Class Codes: A61H 2201/1633 Seat A61H2201/0149 takes precedence
• CPC Class Codes: A61H 3/04 Wheeled walking aids for patients or disabled persons

Abstract

A rollator is disclosed in this invention. The rollator includes: a base frame; front wheel assemblies and rear wheel assemblies respectively mounted on both sides of the base frame; an inverted U-shaped supporting pipe; a H-shaped armrest bracket; connection pieces having block grooves thereon; a slide control lever for cooperating with the block grooves; a seat plate; a spring element; wherein the base frame is provided with unidirectional hinged seats; both bottom ends of the supporting pipe are hinged to the base frame, and both side arms of the supporting pipe are provided with slide holes facing each other; the armrest bracket has bottom portions hinged to the unidirectional hinged seat. The rollator has a simple structure and can be used for various situations in both folded and unfolded state.

Claims

1. A rollator, comprising:

a base frame;

front wheel assemblies and rear wheel assemblies respectively mounted on both sides of the base frame;

an inverted U-shaped supporting pipe having a pair of side arms;

an H-shaped armrest bracket;

connection pieces having block grooves thereon;

a slide control lever for cooperating with the block grooves;

a seat plate; and

a spring element;

wherein the base frame is provided with unidirectional hinged seats;

both bottom ends of the supporting pipe are hinged to the base frame, and both side arms of the supporting pipe are provided with slide holes facing each other;

the armrest bracket has bottom portions respectively hinged to the unidirectional hinged seats;

one end of each of the connection pieces is connected to the armrest bracket, while the other end of each of the connection pieces is hinged to the supporting pipe at a position below the slide holes;

both ends of the slide control lever are respectively received in the slide holes on both side arms of the supporting pipe;

one end of the spring element is mounted on the supporting pipe, while the other end is mounted on the slide control lever;

one end of the seat plate is hinged to the armrest bracket, while the other end is a free end leaning on the supporting pipe.

2. The rollator of claim 1, wherein the rollator further comprises a shelf hinged to a bottom portion of the armrest bracket on both sides.

3. The rollator of claim 1, wherein each of the front wheel assemblies comprises a wheel shaft mounted on the base frame with a direction limiter therebetween.

4. The rollator of claim 3, wherein the direction limiter comprises a follower having a recess mounted on the wheel shaft, a button having a cam portion, a control rod and a spring, wherein one end of the control rod extends through the base frame and is hinged to the cam portion of the button, the other end of the control rod is cooperated with the recess;

one end of the spring is mounted on the base frame, while the other end of the spring is mounted on the control rod.

5. The rollator of claim 4, wherein a stepped portion is provided on an end of the control rod for cooperating with the recess.