Litter lift system

Patent metadata

Field	Value
Publication number	US-11931301-B2
Application number	US-202217705456-A
Country	US
Kind code	B2
Filing date	Mar 28, 2022
Priority date	Oct 24, 2019
Publication date	Mar 19, 2024
Grant date	Mar 19, 2024

Abstract

A litter lift system includes a winch and a lifting strap. The winch includes a rotatable spool. The lifting strap has one end coupled to the rotatable spool and is movable due to rotation of the rotatable spool. The lifting strap has a first lifting segment and a second lifting segment positioned away from the end of the lifting strap coupled to the rotatable spool. The first lifting segment and the second lifting segment are each forked to interface with a frame of a litter at first lifting segment and second lifting segment distal ends, wherein a coupling is attached to the first lifting segment. Rotation of the rotatable spool in a first direction raises the first lifting segment and the second lifting segment. Rotation of the rotatable spool in a second direction different from the first direction lowers the first lifting segment and the second lifting segment.

First claim

What is claimed is:

1. A litter lift system comprising:
a winch having a rotatable spool; and
a lifting strap having one end coupled to the rotatable spool and being movable in response to rotation of the rotatable spool,
the lifting strap having a first lifting segment and a second lifting segment, the second lifting segment positioned away from the lifting strap,
wherein the first lifting segment and the second lifting segment are each forked to interface with a frame of a litter at a first lifting segment distal end and a second lifting segment distal end,
wherein a coupling is attached to the first lifting segment;
wherein rotation of the rotatable spool in a first direction raises the first lifting segment and the second lifting segment; and
wherein rotation of the rotatable spool in a second direction different from the first direction lowers the first lifting segment and the second lifting segment.

2. The litter lift system of claim 1 , wherein rotation of the rotatable spool in the first direction spools the lifting strap about the rotatable spool to pull the first lifting segment and the second lifting segment toward the winch.

3. The litter lift system of claim 2 , wherein rotation of the rotatable spool in the first direction raises the first lifting segment and the second lifting segment vertically relative to the winch by an approximately equal amount.

4. The litter lift system of claim 3 , further comprising a first roller and a second roller spaced apart from the first roller, wherein each of the first roller and the second roller are positioned vertically above the winch, wherein the first lifting segment passes over and is suspended downwardly from the first roller below the winch, and wherein the second lifting segment passes over and is suspended downwardly from the second roller below the winch, wherein the second roller is positioned laterally between the first roller and the winch.

5. The litter lift system of claim 4 , wherein the first lifting segment extends downwardly from the first roller to a first distance and the second lifting segment extends downwardly from the second roller to a second distance, wherein the first distance and the second distance are less than six inches different.

6. The litter lift system of claim 3 , further comprising a first roller positioned vertically above the winch, wherein both of the first lifting segment and the second lifting segment passes over the first roller, and wherein the second lifting segment passes over and is suspended downwardly from the first roller below the winch.

7. The litter lift system of claim 1 , wherein the winch is driven by an electric motor, wherein the electric motor is in communication with a controller, the controller being configured to receive an input and, in response to the input, activate the electric motor to rotate the rotatable spool to adjust a vertical position of the first lifting segment and the second lifting segment at an approximately equal rate.

8. A vehicle, comprising:
a frame;
a vehicle body supported by the frame and having a passenger compartment; and
a litter lift system positioned at least partially within the passenger compartment, the litter lift system comprising:
a winch having a rotatable spool; and
a continuous lifting strap having one end coupled to the rotatable spool and being movable in response to rotation of the rotatable spool,
the lifting strap having a first lifting segment and a second lifting segment, the second lifting segment positioned away from the lifting strap,
wherein the first lifting segment and the second lifting segment are each forked to interface with a frame of a litter at a first lifting segment distal end and a second lifting segment distal end,
wherein a first magnetic component is attached to the first lifting segment and a first magnet is coupled to a ceiling panel, and
wherein the first magnetic component and the first magnet are configured to form a removable coupling to secure the first lifting segment to the ceiling panel;
wherein rotation of the rotatable spool in a first direction raises the first lifting segment and the second lifting segment away from a floor of the passenger compartment; and
wherein rotation of the rotatable spool in a second direction different from the first direction lowers the first lifting segment and the second lifting segment toward the floor of the passenger compartment.

9. The vehicle of claim 8 , wherein the winch is coupled to a roof of the vehicle body and at least half of the continuous lifting strap extends parallel to the roof.

10. The vehicle of claim 9 , wherein the passenger compartment is further defined by the ceiling panel coupled to and extending parallel to the roof, wherein at least a portion of the continuous lifting strap extends above the ceiling panel and below the roof.

11. The vehicle of claim 10 , further comprising a first roller and a second roller spaced apart from the first roller, wherein the first roller and the second roller are coupled to the roof, and wherein the first lifting segment passes over and is suspended downwardly from the first roller, through the ceiling panel, and into the passenger compartment, and wherein the second lifting segment passes over and is suspended downwardly from the second roller, through the ceiling panel, and into the passenger compartment, and wherein the second roller is positioned between the first roller and the winch.

12. The vehicle of claim 11 , wherein the first lifting segment extends downwardly through the ceiling panel to a first distance and the second lifting segment extends downwardly through the ceiling panel to a second distance, wherein the first distance and the second distance are less than six inches different.

13. The vehicle of claim 8 , wherein the first lifting segment and the second lifting segment interface with a frame of a litter via two separate lifting loops coupled to a first lifting segment distal end and a second lifting segment distal end respectively.

14. The vehicle of claim 8 , wherein the rotatable spool is driven by an electric motor, wherein the electric motor is in communication with a controller, the controller being configured to receive an input and, in response to the input, activate the electric motor to rotate the rotatable spool to adjust a vertical position of the first lifting segment and the second lifting segment at an approximately equal rate.

15. A vehicle, comprising:
a chassis;
a vehicle body supported by the chassis and having a passenger compartment therein;
a litter support system having a frame defined by two channels,
wherein the two channels each extend approximately parallel to a longitudinal axis of the chassis to define two separate tracks; and
a litter lift system configured to raise a litter received within the channels away from the frame;
the litter lift system comprising:
a winch having a rotatable spool; and
a lifting strap system having one end coupled to the rotatable spool and being movable in response to rotation of the rotatable spool,
the lifting strap system having a first lifting segment and a second lifting segment, the second lifting segment positioned away from the lifting strap system;
wherein rotation of the rotatable spool in a first direction raises the first lifting segment and the second lifting segment away from the channels; and
wherein rotation of the rotatable spool in a second direction different from the first direction lowers the first lifting segment and the second lifting segment toward the channels.

16. The vehicle of claim 15 , w

Assignees

• Oshkosh Corp

Inventors

• Malcolm Gregory D
• Vetting Matthew B
• Miller Rodney M

Classifications

• A61G3/085 Primary

  on support, which can be brought into a different position, when not in use, e.g. foldable, collapsible, retractable support · CPC title

• A61G3/0825

  using support rack, frame · CPC title

• A61G3/0833

  using other support · CPC title

• A61G3/0841

  on lateral support arms · CPC title

• A61G3/0858

  on support for multiple stretchers · CPC title