The present invention relates to ambulance cots, cot systems and methods of using the same. In particular, the present invention provides an ambulance cot comprising a hydraulic system and a tip angle monitoring, recording and alert system, and methods of using the same (e.g., to transport subjects
The present invention relates to ambulance cots, cot systems and methods of using the same. In particular, the present invention provides an ambulance cot comprising a hydraulic system and a tip angle monitoring, recording and alert system, and methods of using the same (e.g., to transport subjects and/or to detect and/or record operational data related to cot usage).
대표청구항▼
What is claimed is: 1. A hydraulically powered cot, wherein said cot comprises: A) a pair of frames, wherein said pair of frames consist of: 1) a base frame, wherein said base frame comprises a foot-end cross tube and a head-end cross tube, wherein each of said cross tubes are fastened on each end
What is claimed is: 1. A hydraulically powered cot, wherein said cot comprises: A) a pair of frames, wherein said pair of frames consist of: 1) a base frame, wherein said base frame comprises a foot-end cross tube and a head-end cross tube, wherein each of said cross tubes are fastened on each end to a connector, wherein a first connector attached to said head-end cross tube is irremovably attached to a first rail that is irremovably attached to a first connector attached to said foot-end cross tube, and wherein a second connector attached to said head-end cross tube is irremovably attached to a second rail that is irremovably attached to a second connector attached to said foot-end cross tube; and 2) a top frame, wherein said top frame comprises: i) a slider housing affixed to said foot-end portion of said top frame; ii) a telescoping load rail assembly, wherein said assembly comprises wheels that are utilized for rolling said cot out of and into a deck of an ambulance; and iii) a plurality of cross tubes and cross tube castings, wherein said plurality of cross tubes comprise a foot-end cross tube, a head-end cross tube and a middle region cross tube, wherein said top frame is attached to a team lift rail, wherein said team lift rail surrounds the foot-end region and both sides of said top frame, wherein said team lift rail located on one side of said top frame is attached to said team lift rail located on the other side of said top frame via said plurality of cross tubes and cross tube castings, wherein said cross tubes are fastened to said cross tube castings, wherein said castings are fastened to said top frame and comprise an orifice into and/or through which said team lift rails extend; B) a patient litter formed of roto-molded plastic, wherein said patient litter is a four section litter comprising lower leg, upper leg, lower torso and upper torso sections; C) a fixed leg assembly comprising a pair of fixed-length legs, wherein said fixed-length legs are parallel to each other, and wherein said fixed-length legs are pivotably connected to said foot-end cross tube of said base frame, and wherein said fixed-length legs are pivotably attached to said head-end cross tube of said top frame; D) a telescoping leg assembly comprising a pair of telescoping legs, wherein said telescoping legs are parallel to each other, and wherein said telescoping legs comprise: 1) a main rail, wherein said main rail comprises a top side and bottom side, wherein said top side of said main rail comprises an extruded portion fastened to said main rail that comprises a roller bearing, wherein said roller bearing rolls along the top side of an inner rail when said cot is raised or collapsed, wherein said main rails are fastened to each other via a cross tube that is irremovably attached to each of said extruded portions of said main rails, and wherein said main rails are attached to a cross tube residing in said slider housing affixed to said foot-end portion of said top frame; and 2) an inner rail, wherein said inner rail comprises a top side and a bottom side, wherein one or more roller bearings are connected to a top portion and one or more roller bearings are connected to a bottom portion of said inner rail, wherein said roller bearings roll along the inside face of said top side and the inside face of said bottom side of said main rail when said cot is raised or collapsed, wherein said inner rails are pivotably attached to said head-end cross tube of said base frame, wherein said roller bearings reduce frictional force associated with increase in length of said telescoping legs that occurs with raising of said patient litter and the frictional force associated with the decrease in length of said telescoping legs that occurs with lowering of said patient litter; E) a hydraulic system, wherein said hydraulic system comprises a cylinder powered by a hydraulic unit, wherein one end of said cylinder is attached to a cylinder base pivot, wherein said cylinder base pivot is pivotably attached to said foot-end cross tube of said base frame, and wherein the other end of said cylinder is attached to a cylinder cross member, wherein said cylinder cross member is fastened to each of said main rails of said telescoping legs; F) a tip angle monitoring, recording and alert system, wherein said tip angle system comprises: 1) a pressure transducer, wherein said pressure transducer is located within said hydraulic system, detects hydraulic system pressure and converts said pressure to voltage information; 2) an ultrasonic sensor, wherein said ultrasonic sensor is mounted on said slider housing, wherein said ultrasonic sensor measures the distance between said sensor and a slider block attached to said cross tube attached to said main rails of said telescoping legs residing in said slider housing, wherein said distance represents the distance between the ground and said wheels of said telescoping load rail assembly; and 3) a circuit board, wherein said circuit board is located in a controller housing fastened to lift handles surrounding said foot-end of said top frame, wherein said circuit board comprises: i) a controller, wherein said controller monitors and records said voltage information of said pressure transducer, wherein said controller processes said voltage information to calculate load weight on said cot; ii) a processor; iii) a memory component; iv) an accelerometer, wherein said accelerometer is configured to measure in degrees the angle of movement from side to side of said circuit board with respect to a horizontal plane that is perpendicular to the earth's gravitational force; and v) a firmware component, wherein said firmware is configured to calculate and record tip angle of said cot utilizing: a) cot load measured by said pressure transducer; b) cot height measured by said ultrasonic sensor; and c) cot angle measured by said accelerometer; wherein said system further comprises a tip angle algorithm, wherein said processor uses said algorithm to determine in real-time the cot tip angle of said cot; G) a non-series wired, two battery power system, wherein said system powers the hydraulic and electrical components of said cot; and H) a control panel, wherein said control panel comprises icon indicators for service information, hydraulic system information, and tip angle information; wherein said cot is configured to raise and lower a subject. 2. The hydraulically powered cot of claim 1, further comprising hand lever-operated brakes. 3. The hydraulically powered cot of claim 1, wherein said tip angle monitoring, recording and alert system captures and records cot operational use information. 4. The hydraulically powered cot of claim 3, wherein said cot operational use information comprises unsafe cot operation angles. 5. The hydraulically powered cot of claim 3, wherein said cot operational use information is selected from the group consisting of cot angle, cot height, cot load weight, calendar date, and time. 6. The hydraulically powered cot of claim 1, wherein said tip angle monitoring, recording and alert system comprises audio and/or visual alerts that warn a user of an unsafe cot tip angle. 7. The hydraulically powered cot of claim 6, wherein said audio alert comprises a pulsed tone signal and a solid tone signal. 8. The hydraulically powered cot of claim 7, wherein said pulsed tone signal sounds when said cot tip angle is three degrees or less from the tipping point of said cot. 9. The hydraulically powered cot of claim 7, wherein said solid tone signal sounds when said cot tip angle reaches the tipping point of said cot. 10. The hydraulically powered cot of claim 1, wherein said tip angle monitoring, recording and alert system communicates with said controller to preclude raising of said cot when said cot tip angle reaches three degrees or less from the tipping point of said cot. 11. The hydraulically powered cot of claim 1, wherein said cot comprises a weighing function comprising a push button on said control panel, wherein when said push button is pressed, a cot load weight is displayed on said control panel of said cot. 12. The hydraulically powered cot of claim 1, wherein said memory component comprises one or a plurality of memory chips. 13. The hydraulically powered cot of claim 12, wherein said memory component stores cot operational use information. 14. The hydraulically powered cot of claim 13, wherein said cot operational use information is only accessible to an administrator. 15. The hydraulically powered cot of claim 1, wherein said firmware component is accessible via a USB port. 16. The hydraulically powered cot of claim 3, wherein said cot operational use information is removed from said memory component using a USB port. 17. The hydraulically powered cot of claim 1, wherein reducing frictional force of said telescoping legs reduces hydraulic system pressure. 18. The hydraulically powered cot of claim 1, wherein reducing frictional force of said telescoping legs reduces battery current draw. 19. The hydraulically powered cot of claim 1, wherein said cot further comprises one or more hall effect switches configured to regulate power to said hydraulic system. 20. The hydraulically powered cot of claim 1, wherein said subject weighs up to six hundred pounds.
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