Hydraulic exercise device with work measurement

Details Hydraulic exercise device with work measurement Hydraulic exercise device with work measurement

1988-08-01

1990-12-25

Crow, Stephen R.

Undertaking

272 97, 272 73, A63B 2100

Patent

active

049797352

ABSTRACT:
A device is disclosed which provides a work load for exercise machines, and directly measures the work performed. It comprises a liquid pump, linked by a power transmission to an exercise mechanism, producing a flow rate proportional to the exertion rate. The output liquid volume is determined either by observing its level in a transparent container, or via a flow meter. Direct work measurement is assured by making the liquid flow itself the source of resistance for the exercise. This is done via measurement of the pumping force and calibration of the flow restrictions. Work load adjustment devices which maintain a constant ratio of work rate to flow rate are described.

REFERENCES:
patent: 2449833 (1948-09-01), Barnes
patent: 2504007 (1950-04-01), Declerco
patent: 3081634 (1963-03-01), Blaszkowski
patent: 3266801 (1966-08-01), Johnson
patent: 3369403 (1968-02-01), Carlin et al.
patent: 4235437 (1980-11-01), Ruis et al.
patent: 4452447 (1984-06-01), Lepley et al.
patent: 4579335 (1986-04-01), Centafanti
patent: 4705271 (1987-11-01), Mondloch et al.

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