US2335140A

US2335140A - Folding stretcher

Info

Publication number: US2335140A
Application number: US433709A
Authority: US
Inventors: Harold W Bell
Original assignee: Individual
Current assignee: Individual
Priority date: 1942-03-07
Filing date: 1942-03-07
Publication date: 1943-11-23
Anticipated expiration: 1960-11-23

Description

Nov. 23, 1943. I

H. w. BELL FOLDING STRET CHER Filed MaICh 7, 1942 2 Sheets-Sheet 1 Siwa/nto@ ML2/M abro/um,

Nov. 23, 1943. H. w.f BELL FOLDING STRETCHER Filed March '7, 1942 2 Sheets-Sheet 2 Hara/ We Patented Nov. 23, 1943 UNITED STATES PATENT OFFICE 2,335,140 f FOLDING STRETCHER Harold W. Bell, Astoria, Oreg.

Application March fl, 1942, Serial No. 433,709

4 Claims.

This invention relates to stretchers and particularly to the type of stretchers that canbe folded.

The primary object of the invention is to provide a folding stretcher whose hinged portion is self-locking and self-supporting against the downward strain of the weight of the patient.

The side bars of the stretcher, when extended in carrying position, have the axis of their hinges at an angle to a horizontal line transverse the stretcher. By arranging the axis of the hinges in this manner the downward weight of the load and the inward pull of the webbing of the stretcher will be carried by the abutting ends of the hinges, and will not require any transverse bracing between the side bars, which is most desirable, saving time in folding and unfolding the stretcher.

A further provision is made for conveniently folding the end cross supports and providing within these cross supports means for aligning the side bars of the stretcher so that the axis line of the hinges will be in line with one another, permitting the folding of the stretcher. All of this action being accomplished without disconnecting any of the parts of the stretcher, and being done from either end of the stretcher in the folding operation.

These and other incidental objects Will be apparent in the drawings, specification and claims to follow.

Referring to the drawings:

Figure 1 is a plan view of my new and improved stretcher in carrying position, parts broken away for convenience of illustration.

Figure 2 is a side view of Figure 1.

Figure 3 is a sectional view, taken on line 3-3 of Figure 1, looking in the direction indicated, and illustrating the primary object of my invention.

Figure 4 illustrates the folding position of my new and improved stretcher.

Figure 5 shows an advanced position of Figure 4.

Figure 6 shows my new and improved stretcher completely folded.

In the drawings:

The side bars of the stretcher are indicated by numerals I and 2. These bars are hinged midway their length by hinges 3. The axis 4 of the hinges are positioned approximately 45 degrees to a horizontal line running transverse of the stretcher, best illustrated in Figures 1 and 3. The object of which will be described later.

The usual cross webbing is illustrated at 5 and 6, having a flap 1 for bridging the hinged section of the stretcher. Spreader bars 8 and 9 space the side bars I and 2 apart stretching the

webbing

5 and 6 tightly therebetween. The spreader bars consist of two arms I0 and I I, connected together by the hinged portion I2 at their inner ends, the outer end of the bar I0 is pivotally connected at I3 to the clip I4, which is keyed to the side bar at I5 to prevent turning. The outer end of the bar I I is revolvably mounted within the hub I6, and is held therein by the pin II Working within the slot I8. The hub I6 is pivotally connected to the clip I9 at 2li. The clip I9 is prevented from turning by suitable fastening means, as pin I5.

Referring to Figure 4, when it is desired to fold the stretcher the side bars I and 2 are brought together by buckling the spreader bars 8 and 9, as shown. It will be noted that the axis of the hinges 3 are at an angle to a line running transverse the stretcher, and while in this position it would be impossible to fold the stretcher to the position shown in Figure 6. The spreader bar I I, as stated before, is rotatably mounted within the hub IS. This will permit the aligning of the side bars, as shown in Figure 5, by the action of the bar II turning within the hub I6 at the same time the retaining pin I1 will rotate in the slot I8, permitting the axis of the hinge 3 to align themselves with one another.

The object of having the axis of the hinges 3 at an angle to a line running transverse of the stretcher is best explained by referring to Figure 3. The downward pressure of the weight being carried causes the abutting ends 22 to hold the side bars in alignment, and at the same time the inward pull of the

webbing

5 and 6 will be offset by the abutting ends 22 of the hinge so that the hinge itself becomes a self-locking brace for the side bars, requiring no cross brace between the side bars at the hinged point. This is one of the highlights of the invention, making it impossible to fold the stretcher accidentally when the spreader bars 8 and 9 are adjusted, and no intermediate braces being needed.

Suitable supporting legs 23 are provided for supportingthe stretcher, these supporting legs are offset on either end of the stretcher, so as to permit folding, as shown in Figure 6.

I do not wish to be limited to the exact construction as shown, as other forms of mechanical equivalents may be used, still coming within the scope of the claims to follow.

WhatI claim is:

1. In a stretcher a pair of side bars supporting a body carrying member, said side bars each being intermediately hinged for folding with the axes of the folding pivots arranged at an inclination to intersect above the longitudinal center line of the body carrying member, spreader bars connecting the side bars and each provided with 2. In a stretcher, a pair of side bars supporting a body carrying member, said side bars being intermediately hinged for folding with the axes of the folding pivots arranged at an inclination to intersect above the longitudinal center line of the body carrying member, folding spreader bars pivotally connected between the side bars, and a second pivotal connection between each spreader bar and one of said side bars securing limited rotation of the side bars relative to one y another when said side bars are in immediate proximity with each other thereby aligning the aces of the intermediate hinges of the side bars.

l3. In a stretcher, a pair of side bars supporting a body carrying member, said side bars being intermediately hinged for folding with the axes of fthe folding pivots arranged at an inclination to intersect above the longitudinal center line of the body carrying member, folding spreader bars pivotally connected between the side bars, and construction securing limited rotation of the side bars relative to one another when said side bars are in immediate proximity with each other for the purpose of aligning the axes of the intermediateV hinges of the side bars.

4. A stretcher including intermedately hinged Vside bars for folding upon a transverse axes, fold-