Patient handling apparatus with hydraulic control system

Patent metadata

Field	Value
Publication number	US-11666494-B2
Application number	US-202117192202-A
Country	US
Kind code	B2
Filing date	Mar 4, 2021
Priority date	Apr 21, 2017
Publication date	Jun 6, 2023
Grant date	Jun 6, 2023

Abstract

An emergency cot includes a litter frame, a base, and a lift assembly supporting the litter frame relative to the base. The lift assembly includes load bearing members pivotally coupled to the litter frame by head-end upper pivot connections and foot-end upper pivot connections and to the base by head-end lower pivot connections and foot-end lower pivot connections for raising or lowering the base or the litter frame with respect to the other. The foot-end upper pivot connections or head-end upper pivot connections are movable toward or away from the longitudinal axis of the litter frame to allow one end of the litter frame to be tilted upwardly.

First claim

We claim:

1. An emergency cot comprising:
a litter frame having a head-end and a foot-end;
a base; and
a lift assembly mounted to said base, said lift assembly including X-frame members coupled to said litter frame by a plurality of foot-end mounts and a plurality of head-end mounts, said plurality of head-end mounts to said litter frame being closer to said head-end than said foot-end of said litter frame, said plurality of foot-end mounts to said litter frame being closer to said foot-end than said head-end of said litter frame, said lift assembly operable to raise or lower said litter frame with respect to said base, wherein said litter frame can be raised between a fully raised position when said lift assembly is fully extended and a fully lowered position when said lift assembly is fully retracted, and wherein said lift assembly is configured to allow said litter frame to be tilted relative to said lift assembly when said lift assembly is fully extended and based on application of a downward force to the foot-end to cause longitudinal movement of a movable member of the plurality of foot-end mounts, wherein the litter frame is tiltable relative to said lift assembly so that said head-end of said litter frame and said plurality of head-end mounts can be raised beyond said fully raised position of said litter frame without decoupling said litter frame from said lift assembly.

2. The emergency cot according to claim 1 , wherein each of said plurality of foot-end mounts include a pivot member and a guide, said guides guiding said pivot members between fully raised positions when said lift assembly is fully extended and fully lowered positions when said lift assembly is fully retracted, and said guides being configured to allow said head-end of said litter frame to be tilted upwardly above said fully raised position of said litter frame.

3. The emergency cot according to claim 2 , wherein each of said guides includes a recess to receive a respective pivot member of said pivot members, said recesses receiving and guiding said pivot members when said lift assembly is extended or retracted, said recesses extending beyond said fully raised positions of said pivot members wherein said guides are operable to move relative to said pivot members when said pivot members are in their fully raised positions to allow said head-end of said litter frame to be tilted upwardly above said fully raised position of said litter frame.

4. The emergency cot according to claim 3 , wherein each of said pivot members includes a roller, and said rollers being received in and guided by said recesses.

5. The emergency cot according to claim 3 , wherein each of said recesses includes a curved portion.

6. The emergency cot according to claim 5 , wherein each of said curved portions includes said fully raised position of said respective pivot member.

7. The emergency cot according to claim 6 , wherein each of said curved portions extends beyond said fully raised positions of said pivot members until a force is applied to said litter frame to tilt said litter frame above its fully raised position.

8. The emergency cot according to claim 3 , wherein each of said recesses includes a linear section.

9. The emergency cot according to claim 8 , wherein said linear sections include said fully lowered positions of said pivot members.

10. An emergency cot comprising:
a litter frame having a head-end and a foot-end;
a base; and
a lift assembly supporting said litter frame relative to said base, said lift assembly comprising X-frame members coupled to said litter frame by head-end upper mounts and foot-end upper mounts and coupled to said base by head-end lower mounts and foot-end lower mounts for raising or lowering said litter frame with respect to said base wherein said litter frame can be raised between a fully raised position when said lift assembly is fully extended and a fully lowered position when said lift assembly is fully retracted, said foot-end upper mounts of said lift assembly to said litter frame being configured to allow said litter frame to be tilted relative to said lift assembly when said lift assembly is fully extended and based on application of a downward force to the foot-end to cause at longitudinal movement of a movable member of the plurality of foot-end mounts, wherein the litter frame is tiltable relative to said lift assembly so that said head-end of said litter frame and said head-end upper mounts can be raised beyond said fully raised position of said litter frame without decoupling said litter frame from said lift assembly.

11. The emergency cot according to claim 10 , wherein said X-frame members comprise telescoping members.

12. The emergency cot according to claim 10 , wherein each of said X-frame members has a lower telescoping member pivotally mounted to said base.

13. The emergency cot according to claim 10 , wherein each of said foot-end upper mounts includes a pivot member and a guide, said guides guiding said pivot members, and said guides being configured to allow said head-end of said litter frame to be tilted upwardly above said fully raised position of said litter frame.

14. The emergency cot according to claim 13 , wherein each of said guides includes a recess to receive a respective pivot member of said pivot members, said recesses receiving and guiding said pivot members when said lift assembly is extended or retracted, said guides guiding said pivot members between fully raised positions when said lift assembly is fully extend and fully lowered positions when said lift assembly is fully retracted, and said recesses extending beyond said fully raised positions of said pivot members wherein said guides are operable to move relative to said pivot members when said pivot members are in their fully raised positions to allow said head-end of said litter frame to be tilted upwardly above said fully raised position of said litter frame.

15. The emergency cot according to claim 14 , wherein each of said pivot members includes a roller, and said rollers being received in and guided by said recesses.

16. The emergency cot according to claim 13 , wherein each of said guides form a path for a respective pivot member of said pivot members, each of said path including a curved portion configured to allow said head-end of said litter frame to be tilted upwardly above said fully raised position of said litter frame.

17. The emergency cot according to claim 16 , wherein each of said paths includes a linear section.

18. The emergency cot according to claim 17 , wherein said linear sections include said fully lowered positions of said pivot members.

19. The emergency cot of claim 10 , wherein said plurality of head-end upper mounts to said litter frame are closer to said head-end than said foot-end of said litter frame, and wherein said plurality of foot-end upper mounts to said litter frame are closer to said foot-end than said head-end of said litter frame.

20. An emergency cot comprising:
a litter frame having a head-end and a foot-end;
a base; and
a lift assembly mounted to said base, said litter frame being mounted to said lift assembly by a plurality of mounts, said lift assembly operable to raise or lower said litter frame with respect to said base, wherein said litter frame can be raised between a fully raised position when said lift assembly is fully extended and a fully lowered position when said lift assembly is fully retracted, wherein said plurality of mounts of said lift assembly to said litter frame are configured to allow

Assignees

• Stryker Corp

Inventors

• Souke Chad Conway
• Gentile Christopher
• Lucas Ross Timothy
• Brubaker Michael T

Classifications

• A61G1/0567 Primary

  folding in x-shape · CPC title

• A61G2203/32

  for force · CPC title

• A61G1/0237

  having at least one swivelling wheel, e.g. castors · CPC title