Carrier for rescuing patients

• US 4,688,813 A
• Filed: 03/05/1986
• Issued: 08/25/1987
• Est. Priority Date: 12/28/1982
• Status: Expired due to Term

• Current Assignee: Sunwa Sharyo Manufacturing Company Limited
• Original Assignee: Sunwa Sharyo Manufacturing Company Limited
• Inventors: Takahashi, Kou, Misawa, Rintaro
• Primary Examiner(s): Love, John J.
• Assistant Examiner(s): NOT, DEFINED
• Application Number:
  US06/836,351
• Time in Patent Office: 538 Days
• Field of Search: 280/5.2, 280/5.22, 280/5.24, 280/5.26, 280/242 WC, 280/289 WC, 280/DIG. 10, 180/9.1, 180/9.21, 180/9.22, 180/907, 180/8.2, 180/8.7, 297/DIG. 4, 188/184, 188/185
• US Class Current: 280/5.22
• CPC Class Codes: A61G 5/061 for climbing stairs
• CPC Class Codes: A61G 5/066 with endless belts
• CPC Class Codes: A61G 5/085 folding up and down, e.g. reducing or expanding the overall height of the wheelchair
• CPC Class Codes: B62D 55/075 Tracked vehicles for ascending or descending stairs, steep slopes or vertical surfacesmagnetic or pneumatic ground-engaging parts B62D55/265; chairs or multi-track cycles specially adapted for invalids A61G5/00
• CPC Class Codes: Y10S 180/907 Motorized wheelchairs
• CPC Class Codes: Y10S 280/10 Stair climbing chairs

Abstract

A carrier for rescuing patients having a frame having a pair of lower horizontal portions and upwardly inclined portions adjacent to the horizontal portions at rear end portions thereof.

A pair of front and rear wheels are provided on the frame, and a pair of crawlers engaged with the frame and wheels to be moved on the frame and around the wheels.

A seat having a handle is provided on the frame. A brake such as a centrifugal brake is provided for slowing the rotation of either of said front and rear wheels and for keeping the rotation speed in a constant speed.

Travelling wheels are rotatably provided on the frame for moving the carrier on a flat surface.

Claims

1. A carrier for rescuing patients comprising:

a frame having a pair of lower horizontal portions and upwardly inclined portions adjacent to said horizontal portions at rear end portions thereof;

a pair of front wheels provided on front portions of said frame;

a pair of rear wheels provided on rear portions of said frame;

a pair of crawlers is engaged with said frame and said wheels so as to be moved on the frame and around the wheels;

a seat provided on said frame;

a handle connected to said seat;

brake means for slowing the rotation of either of said front and rear wheels;

front and rear travelling wheels rotatably provided on said frame for moving the carrier on a flat surface;

spring means for raising the front travelling wheel higher than an underside level of the crawlers;

said rear travelling wheel comprises a caster,

a bearing mounted to said frame;

a lever;

said front and rear travelling wheels are mounted on respective ends of said lever;

a shaft rotatably mounting said lever relative to said frame by said shaft being connected to said lever and rotatably disposed in said bearing; and

said spring means is a torsion spring engaged in said bearing and engages against said shaft so as to rotate said shaft.

2. The carrier according to claim 1, wherein

said front and rear travelling wheels are mounted on said lever so as to be freely rotatable.

3. The carrier according to claim 1, wherein

one of each of said lever, shaft, bearing, spring means and front and rear travelling wheels is included on each lateral side of said frame.