초록 ▼

An escape apparatus for lowering persons down a structure includes an upper pulley and a lower pulley, both of which are secured to the structure. An endless loop cable passes around the pulleys such that movement of the cable causes the lower pulley to rotate. A hydraulic speed control system is pr

An escape apparatus for lowering persons down a structure includes an upper pulley and a lower pulley, both of which are secured to the structure. An endless loop cable passes around the pulleys such that movement of the cable causes the lower pulley to rotate. A hydraulic speed control system is provided which includes a hydraulic reservoir containing hydraulic fluid, a hydraulic pump, and conduits for interconnecting the pump and the reservoir such that the pump removes hydraulic fluid from the reservoir and returns the fluid under pressure to the reservoir. The output of the pump is restricted by means of a valve, and the pump is driven by the lower pulley such that downward movement of the cable causes the lower pulley to rotate and therefore the pump to force fluid through the restricting valve. This flow restriction of hydraulic fluid pumped by the pump limits the speed of the pump and thereby the speed of the cable. A friction clamp for supporting a person on the cable is disclosed.

대표청구항 ▼

An escape apparatus for lowering persons down a structure comprising: a base pivotably mounted adjacent to the structure to pivot in a vertical plane; a lower pulley rotably mounted to the base; an upper pulley secured to the structure in vertical alignment with the lower pulley; an endless loop cab

An escape apparatus for lowering persons down a structure comprising: a base pivotably mounted adjacent to the structure to pivot in a vertical plane; a lower pulley rotably mounted to the base; an upper pulley secured to the structure in vertical alignment with the lower pulley; an endless loop cable mounted to pass around the upper and lower pulley such that movement of the cable causes at least the first pulley to rotate; adjusting means mounted to the base to adjust the vertical position of the base in opposition to tension of the cable on the first pulley in order to adjust the tension of the cable; means for supporting a person on the cable; a hydraulic reservoir containing a hydraulic fluid; a hydraulic pump; conduit means for interconnecting the pump and the reservoir such that the pump removes hydraulic fluid from the reservoir and returns the fluid under pressure to the reservoir; restricting means for restricting the flow of hydraulic fluid in the conduit means from the pump to the reservoir; means for coupling the pump to the first pulley such that movement of the cable causes the first pulley to rotate and the pump to force fluid through the restricting means, and the flow restriction of hydraulic fluid pumped by the pump limits the speed of the pump and thereby the speed of the cable; and auxillary brake means coupled to the first pulley for slowing rotation of the first pulley by an additional amount when a person supported on the cable by the support means approaches the first pulley.