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US 4,290,599 AGranted
Exerciser
AssigneeIssac Berger
InventorIsaac Berger
Life of this patent
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AssigneeIssac Berger
InventorIsaac Berger
Estimating the term…
An exercising device which relies on a pneumatic resistance element, and in which on alternate strokes air is inducted or expelled. Inner and outer telescoping cylindrical tubes are provided with handles on their outer ends for manipulating the device, by exerting force in tension, to rectilinearly expand the length of the device, and in compression, to rectilinearly contract the length of the device. A flexible resilient washer mounted at the inner end of the inner tube slidably and sealingly engages the inner surface of the outer tube. Oppositely acting check valves are provided together with respective throttling means at the outer end of the outer tube adjacent its handle. The throttling means, typically consisting of a selectively rotatable multiply apertured outer sleeve, selectively connects the check valves to the outer atmosphere, with one check valve permitting only ingress of air into the outer tube and the other check valve only permitting air egress. The degree of throttling is varied by having apertures of varying size in the sleeve.
An exercising device with a pneumatic resistance element, said device comprising an inner tube, an outer tube in telescoping relationship with the inner tube, handles on the outer ends of the two tubes, the inner end of said inner tube terminating short of the outer end of said outer tube when the tubes are fully telescoped, means closing the outer end of the outer tube, means closing the inner end of the inner tube, said last-named means including flexible resilient means slidably and sealingly engaging the inner surface of the outer tube and substantially preventing the leakage of air between the periphery of said flexible resilient means and the inner surface of the outer tube, first and second check valves within and supported by said outer tube, said check valves carried by the sides of the outer tube end, being disposed between the outer end of the outer tube and said flexible resilient means, said first check valve permitting ingress of air into said outer tube but preventing egress of air from said outer tube, said second check valve preventing ingress of air into said outer tube but permitting egress of air from said outer tube, a sleeve rotatable on said outer tube, said sleeve having a plurality of openings different ones of which are selectively and alternatively coupleable with said check valves to variably control flow of air into or out of said outer tube.
An exercising device with a pneumatic resistance element, said device comprising an inner tube, an outer tube in telescoping relationship with the inner tube, handles on the outer ends of the two tubes, the inner end of said inner tube terminating short of the outer end of said outer tube when the tubes are fully telescoped, means closing the outer end of the outer tube, means closing the inner end of the inner tube, said last-named means including flexible resilient means slidably and sealingly engaging the inner surface of the outer tube and substantially preventing the leakage of air between the periphery of said flexible resilient means and the inner surface of the outer tube, first and second check valves within and supported by said outer tube, said check valves being disposed between the outer end of the outer tube and said flexible resilient means, said first check valve permitting ingress of air into said outer tube but preventing egress of air from said outer tube, said second check valve preventing ingress of air into said outer tube but permitting egress of air from said outer tube, a sleeve rotatable on said outer tube, said sleeve having a plurality of openings different ones of which are selectively and alternatively coupleable with said check valves to variably control flow of air into or out of said outer tube, and in which the first and second check valves are mounted at opposite ends of a hollow rectilinear fitting, said fitting being mounted transversely to the central longitudinal axis of the outer tube and having a middle side opening for ingress or egress of air into or out of the outer tube and an outer opening at each end for respective transfer of air to or from the atmosphere.
An exercising device with a pneumatic resistance element, said device comprising an inner tube, an outer tube in telescoping relationship with the inner tube, handles on the outer ends of the two tubes, the inner end of said inner tube terminating short of the outer end of said outer tube when the tubes are fully telescoped, means closing the outer end of the outer tubes, means closing the inner end of the inner tube, said last-named means including flexible resilient means slidably and sealingly engaging the inner surface of the outer tube and substantially preventing the leakage of air between the periphery of said flexible resilient means and the inner surface of the outer tube, first and second check valve within and supported by said outer tube, said check valves being disposed between the outer end of the outer tube and said flexible resilient means, said first check valve permitting ingress of air into said outer tube but preventing egress of air from said outer tube, said second check valve preventing ingress of air into said outer tube but permitting egress of air from said outer tube, a sleeve rotatable on said outer tube, said sleeve having a plurality of openings different ones of which are selectively and alternatively coupleable with said check valves to variably control flow of air into or out of said outer tube and in which some openings are flow restricting and other are non-flow restricting and in which when a flow restricting opening is coupled to one check valve a non-flow restricting opening is coupled to the other check valve.
Dependencies are inferred from the claim text.