An apparatus includes a hydraulic circuit that is configured to selectively open fluid communication between one portion of the hydraulic circuit and another portion of the hydraulic circuit, such as a reservoir, based on the flow of the hydraulic fluid in the one portion. When the flow of hydraulic fluid exceeds a selected threshold in the one portion of the hydraulic circuit, the flow of fluid urges the opening of a hydraulic component of the hydraulic circuit to allow fluid communication between the one portion and the reservoir to discharge fluid from the one portion.

According to one embodiment, a roll-in cot may include a support frame, a pair of front legs, a pair of back legs, and a cot actuation system. The pair of front legs may be slidingly coupled to the support frame. Each front leg includes at least one front wheel. The pair of back legs may be slidingly coupled to the support frame. Each back leg includes at least one back wheel. The cot actuation system includes a front actuator that moves the front legs and a back actuator that moves the back legs. The front actuator and the back actuator raises or lowers the support frame in tandem. The front actuator raises or lowers the front end of the support frame independently of the back actuator. The back actuator raises or lowers the back end of the support frame independently of the front actuator.

An ambulance stretcher, which comprises: a support frame for supporting a patient; a pair of front legs, each having a front wheel; a pair of rear legs, each having a rear wheel; a front coupling body connected to a front end of the support frame; characterized in that the coupling body comprises a spherical or hemispherical coupling head arranged on a vertical longitudinal median plane of the support frame.

A patient care system for treating a patient is provided. The patient care system includes a patient transport apparatus, a chest compression system configured to provide automatic chest compressions to a patient, and a retainer for securing the chest compression system to the patient. The patient transport apparatus includes a base, an intermediate frame arranged for movement relative to the base, and a patient support deck which defines a patient support surface. The chest compression system includes a driver having a driver body movably supporting a plunger, and a driver frame to support the driver adjacent to the chest of the patient. The retainer includes a collar releasably engageable with the chest compression system, and a brace including a shoulder support and a retainer frame. The shoulder support is arranged to abut a shoulder of the patient and to brace the chest compression system relative to the patient.

A device for moving a load is provided. The device includes a platform defining a surface and an edge extending downward therefrom. The device further includes two pairs of opposing legs each defining a top portion pivotally engaged with the platform interior of the edge, wherein each pair of legs has an extended position where each leg extends away from the edge. Each pair of legs further includes a collapsed position where the top portion of each leg extends substantially parallel and interior to the edge, a middle portion of each leg extends through a corresponding slot defined by the edge, and a bottom portion of each leg extends substantially parallel and exterior to the edge.

A patient transport apparatus for use with a vehicle, comprising a lift mechanism between a base and a support frame to move between an extended configuration defining a first distance and a retracted configuration defining a second distance. An interface generates a user signal. A sensor generates a sensor signal corresponding to force acting on the base relative to the support frame. A controller determines if the user signal corresponds to an extend or retract command; determines if the force acting on the base has exceeded a predetermined threshold value based on the sensor signal; drives the lift mechanism toward the extended configuration where the user signal corresponds to the extend command and toward the retracted configuration where the user signal corresponds to the retract command; and interrupts driving the lift mechanism to stop motion of the lift mechanism in response to the sensor signal exceeding the predetermined threshold value.

An ambulance cot loading and unloading system for an emergency vehicle includes a base for mounting in the emergency vehicle and an arm mounted for linear movement along the base, wherein the arm configured to support a cot while the cot is being loaded into or unloaded from the emergency vehicle. The ambulance cot loading and unloading system further includes an indicator mounted relative to the arm and a control system, which is in communication with the indicator and configured to generate a status indication of the cot loading and unloading system at the indicator.

A powered ambulance cot and methods of raising and lowering the cot as well as loading and unloading the cot are disclosed. The cot includes a support frame and legs, each leg having a wheel. An actuator of an actuation system interconnects the frame and legs, and is configured to effect changes in elevation of the frame relative to the wheel of each of the legs. A control system controls activation of the actuation system, and detects both the actuator at a first location relative to the frame, where the first location is remote from a second location and which situates an end of the actuator that is remote from each wheel closer to the frame, and a presence of a signal requesting a change in elevation of said support frame to thereby cause the legs to move relative to the support frame.

In one embodiment, a rolling transport cot may include an elongate frame, one or more support linkages, an arcuate coupling member, and a swivel caster. The one or more support linkages may include a pivoting link that is in rotatable engagement with the elongate frame, a traveling link that is in sliding and rotatable engagement with the elongate frame, and an equalizing link that is in rotatable engagement with the traveling link. The arcuate coupling member can be in rotatable engagement with the pivoting link and the equalizing link. The swivel caster may include a wheel that rotates along a surface and a swivel mechanism that can rotate around an axis that is aligned with the surface at a swivel angle φ. When the traveling link is urged along the elongate frame, the swivel angle φ of the swivel mechanism can be substantially constant.

A patient transport apparatus comprising a support frame, a base, a bracket coupled to the support frame and comprising a channel being non-linear, a frame assembly coupled between the support frame and the base and comprising a slidable member disposed in the channel, the slidable member being moveable between a plurality of different positions in the channel to place the support frame in a plurality of different poses relative to the base. The patient transport apparatus also comprises a sensor configured to detect the slidable member in the channel and produce a reading, as well as a controller coupled to the sensor and configured to receive the reading from the sensor, determine the position of the slidable member in the channel based on the reading, and determine the pose of the support frame relative to the base based on the determined position of the slidable member.