Side frame for a cot or bed

Details Side frame for a cot or bed Side frame for a cot or bed

2003-03-19

2004-08-10

Luu, Teri Pham (Department: 3673)

Beds

Having safety device

Side guard

C005S093100, C005S100000

Reexamination Certificate

active

06772459

ABSTRACT:

FIELD OF THE INVENTION
This invention relates to a side frame for a cot or bed, particularly but not exclusively for hospital or care home use or domestic use, and to a cot or bed incorporating at least one such side frame.
BACKGROUND OF THE INVENTION
A standard requirement for cots, for paediatric use or for use with patients of all ages dependent upon care need, is for the presence of upwardly extending side frames to constrain a possibly unconscious patient to the area of the cot. For the unobstructed performance of nursing care such side frames need ideally to be absent, and consequently one standard construction is for a side frame to be provided with horizontal axis hinges at approximately its mid-height of the side frame, so that an upper portion may be rotated through 180° between a deployed position, for maximum patient containment, and a non-deployed position for patient access and/or minimal containment, with user-operable retaining latches to latch the top half at least in its upper, deployed position. As a side frame is typically approximately 2 ft (0.6 m) in height, rotation requires a minimum lateral clearance of 1 ft (0.3 m). An alternative system is a side frame that may be moved in a vertical plane between an upper, deployed position, and a lower “access” position, again with user-operable retaining latches. This system is used extensively in infant's domestic cots constructed of timber, where a side frame is of relatively light weight and can readily be lifted along slide guides to its deployed position. However, hospital type cots are invariably constructed from metal tubing due to the need for durability over a reasonable service life, a side frame even of 4-5 ft (1.2 m-1.5 m) length presents a considerable weight, sometimes requiring the installation of a power means, with attendant cost penalty, to effect lifting of the side frame to its upper, deployed position.
Furthermore, there is an increasing demand for variable height cots so that nursing or care staff may locate the patent at optimum height, but fixed size side frames do not readily permit use with variable height cots.
In GB 637951 is described a cot with a drop down side frame, particularly for infants, in which the space requirement for the side frame in its dropped position, is minimised by the use of telescopic struts to reduce the height of the side frame in its dropped position.
In WO 00/42884 is described a wheeled stretcher which has side frames capable of telescoping between an upper position and a lower position, depending on the patient's needs.
OBJECT OF THE INVENTION
A basic object of the invention is the provision in a first aspect of an improved side frame for a cot or bed, and in a second aspect of a cot or bed incorporating at least one such side.
SUMMARY OF A FIRST ASPECT OF THE INVENTION
According to a first aspect of the invention, there is provided a side frame for a cot or bed, particularly, but not exclusively, for hospital use, comprising upper and lower rails located in spaced-apart, parallel relationship and of length required for the side frame, with the rails inter-connected by a plurality of spaced-apart, transversely extending, telescopic struts, and with a third, parallel rail interposed between the upper and lower rails and with an outer tube or cylinder of each strut slidable through apertures in the third rail.
SUMMARY OF A SECOND ASPECT OF THE INVENTION
According to a second aspect of the invention, there is provided a cot or bed, particularly, but not exclusively, for hospital use, comprising at least one side frame in accordance with the first aspect.
ADVANTAGE(S) OF THE INVENTION
With the side frame in accordance with the invention, e.g. for hospital, care home or domestic use, the third rail is attached in a fixed position to the cot or bed, e.g. by being bolted or screwed to the mattress support frame, so that, to lower the side frame from a fully deployed position, in a first stage, the struts are contracted, to give partial access/constraint, and if full access, zero constraint is required, then in a second stage the cylinders are pushed through the apertures of the third rail, the lower rail is lowered into close proximity with the floor, until the upper rail is in close proximity to, or abuts, the third rail, and the side frame thus presents zero, or minimal, obstruction to the mattress and/or patient.
It follows that the side in accordance with the invention, gives the medical staff or carer, the option of selecting, e.g. 50%, obstruction/access in a semi-deployed position, and 100% obstruction in a fully deployed position, and zero obstruction/maximum access in a fully retracted position.
Furthermore, because all positional adjustment movements of the side frame would, in practice, be in a vertical plane, minimal lateral clearance is required for positional changes of the side frame.
PREFERRED FEATURES OF THE INVENTION
The struts are metallic.
The struts are timber.
The struts are of plastics.
The struts comprise in one embodiment an inner tube and an outer tube of similar length.
The struts each comprise in another embodiment an inner rod and an outer cylinder, of similar length.
As a weight reducing measure, the upper and lower rails at least are non-metallic, typically of synthetic plastics materials, which materials are unaffected by cleansing or sterilising fluids, or possibly of timber.
The lower rail is provided with a manually operable latch to latch the lower rail to the third rail.
The third rail, is apertured at suitable intervals for the passage of fixing bolts or screws to secure the side, e.g. to the mattress supporting frame of the cot, or to the base of a divan.
The telescopic struts, e.g. 7 to 15 in number, are located at such spacing as to prevent a child or infant, or the head of a patient, passing between adjacent struts.
For use with a cot, a first embodiment of side incorporates a manually operable latching means at each end of the upper rail; each latching means comprises a retractable pin; and the cot is provided with vertical end columns having a series of spaced holes, so that a selected hole may be engaged by the pin to deploy the side frame at a required height.
A cot, in accordance with the second aspect is provided with two cot ends, which may be fixed or may be wholly removable.
For use on a bed, such as a domestic divan, no vertical columns exist (or can readily be provided) to which the side frame can be selectively latched in a partially, or fully deployed position; then a second embodiment of side frame has, at least, one biassing strut preferably in the form of a gas strut, capable of maintaining the side frame in a fully, or partially, deployed position, with means for manually rendering the force exerted by the biassing strut inoperative when retraction, by lowering, of the side is required.
The gas strut is rendered inoperative by manual release of gas.
As adult hospital beds or domestic divans are typically 6 ft (2 meters) in length, the sides, in accordance with the invention, are approximately 3 ft (1 meter) in length, so that each adult bed or divan would require four sides, whereby each side may be lowered in turn as and when access is required; telescoping of relatively short length sides is a simpler operation for hospital staff or carer, whilst lightweight/thinner gauge materials may be employed when sufficient rigidity over only 3 ft (1 meter) is required.
The upper rail is provided with at least one elongate through hole, constituting a handgrip for use in manoeuvring the side.


REFERENCES:
patent: 754140 (1904-03-01), Hollis
patent: 2804631 (1957-09-01), Levin
patent: 3193849 (1965-07-01), Landry
patent: 3193850 (1965-07-01), Landry
patent: 4934007 (1990-06-01), Sweet
patent: 5134734 (1992-08-01), Bozino
patent: 5884348 (1999-03-01), Onishi et al.
patent: 5926870 (1999-07-01), Branca-Barnes et al.
patent: 637951 (1950-05-01), None
patent: 376719 (1999-12-01), None
patent: WO0042884 (2000-07-01), None

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