US4869498A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Isokinetic ergometer
Assignee: KST Motorenversuch GmbH and Co KG
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Filing: 1988-02-17
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Granted: 1989-09-26
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Expires: 2008-02-17
Abstract
Abstract The present invention provides an isokinetic ergometer comprising a movement guide, power gripping points, a brake unit connected therewith and a speed regulator, characterized by the following features: (a) the power gripping points are mechanically connected with a piston movable in a cylinder, (b) a flow regulation valve is attached to the cylinder, and (c) the cylinder and flow regulation valve are hydraulically connected with one another via a pipe, the flow regulation valve regulating the length of the stroke.
Inventors
- 👤 Rainer Wolf
- 👤 Juergen Volz
- 👤 Rainer Denkinger
- 👤 Volker Nolte
- 👤 Gerd Hussy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:15
CPC Classifications
A; A63; A63B; A63B21/00; A63B21/008; A63B21/0083; A63B21/00058; A63B21/00069; A63B21/00072; A63B22/00; A63B22/0076; A63B22/0025; A63B2022/0041; A63B2022/0082; A63B69/00; A63B69/06; A63B2069/064; A63B21/002
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
163 words
An isokinetic ergometer, comprising: a seat; a guide track along which the seat is slidable; a support frame; power gripping means for exerting power against a force; and a control unit connected with said power gripping means for controlling the amount of force, wherein said control unit comprises: a piston movable in a cylinder, a flow regulation valve attached to the cylinder, said flow regulation valve including a housing having a fluid inlet and a fluid outlet, a resiliently urged valve piston acted upon by said fluid, adjustable shutter means for controlling fluid through the valve to predeterminable values and a bypass between the inlet and outlet including a return valve, The cylinder and flow regulation valve being hydraulically connected with one another via a pipe, the flow regulation valve regulating hydraulic resistance according to a power transmission through the power gripping means, and wherein the power gripping means is mechanically connected with said control unit and comprises oars of a rowing machine.
Claim 2
Dependent Claim
163 words
An isokinetic ergometer, comprising: a seat; a guide track along which the seat is slidable; a support frame; power gripping means for exerting power against a force; and a control unit connected with said power gripping means for controlling the amount of force, wherein said control unit comprises: a piston movable in a cylinder, a flow regulation valve attached to the cylinder, said flow regulation valve including a housing having a fluid inlet and a fluid outlet, a resiliently urged valve piston acted upon by said fluid, adjustable shutter means for controlling fluid through the valve to predeterminable values and a bypass between the inlet and outlet including a return valve, The cylinder and flow regulation valve being hydraulically connected with one another via a pipe, the flow regulation valve regulating hydraulic resistance according to a power transmission through the power gripping means, and wherein the power gripping means is mechanically connected with said control unit and comprises oars of a rowing machine.
Claim 3
Dependent Claim
33 words
An ergometer according to claim 1, further comprising a toothed rack connected with the cylinder piston and a cogwheel engaged with the toothed rack, the power gripping means being connected with the cogwheel.
Claim 4
Dependent Claim
34 words
An ergometer according to claim 2, wherein the power gripping means comprises a lever tiltable mounted on a pin and cooperating via said cogwheel with said toothed rack firmly attached to the cylinder piston.
Claim 5
Dependent Claim
182 words
An isokinetic ergometer, comprising: (a) power gripping means for exerting power against a force; (b) a control unit connected with said power gripping means for controlling the amount of force, wherein said control unit comprises: a piston movable in a cylinder; a flow regulation valve attached to the cylinder, said flow regulation valve including a housing having a fluid inlet and a fluid outlet, a resiliently urged valve piston acted upon by said fluid, adjustable shutter means for controlling fluid through the valve to predeterminable values and a bypass between the inlet and outlet including a return valve; the cylinder and flow regulation valve being hydraulically connected with one another via a pipe, the flow regulation valve regulating hydraulic pressure according to a power transmission through the power gripping means and (c) a toothed rack connected with the piston and a cogwheel engaged with the toothed rack, the power gripping means being connected with the cogwheel said power gripping means comprising a lever tiltable mounted on a pin and cooperating via said cogwheel with said toothed rack firmly attached to the piston.
Claim 6
Dependent Claim
182 words
An isokinetic ergometer, comprising: (a) power gripping means for exerting power against a force; (b) a control unit connected with said power gripping means for controlling the amount of force, wherein said control unit comprises: a piston movable in a cylinder; a flow regulation valve attached to the cylinder, said flow regulation valve including a housing having a fluid inlet and a fluid outlet, a resiliently urged valve piston acted upon by said fluid, adjustable shutter means for controlling fluid through the valve to predeterminable values and a bypass between the inlet and outlet including a return valve; the cylinder and flow regulation valve being hydraulically connected with one another via a pipe, the flow regulation valve regulating hydraulic pressure according to a power transmission through the power gripping means and (c) a toothed rack connected with the piston and a cogwheel engaged with the toothed rack, the power gripping means being connected with the cogwheel said power gripping means comprising a lever tiltable mounted on a pin and cooperating via said cogwheel with said toothed rack firmly attached to the piston.
Claim 7
Dependent Claim
19 words
An ergometer according to claim 4, further comprising a hydraulic motor attached to the pipe connected with the cylinder.
Claim 8
Dependent Claim
28 words
An ergometer according to claim 5, further comprising, between the cylinder and the hydraulic motor, a second flow regulation valve connected in series with a second return valve.
Claim 9
Dependent Claim
27 words
An ergometer according to claim 5, further comprising means for switching on the hydraulic motor, comprising a cut-off valve actuatable to cut-off fluid pressure to the cylinder.
Claim 10
Dependent Claim
42 words
An ergometer according to claim 5, further comprising a second pipe connectable with the hydraulic motor via the flow regulation valve, a storage container for hydraulic fluid, and a directional valve arranged to selectively connect said second pipe with said storage container.
Claim 11
Dependent Claim
46 words
An ergometer according to claim 8, wherein the hydraulic motor comprises a constant feed pump, and the connecting pipe between the flow regulating valve and the pump includes a pressure valve in a branch which, on an outlet side thereof, is connected with the storage container.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-09-25 | 1993-03-27 | 1993-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-09-25 | 1997-03-27 | 1997-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-09-25 | 2001-03-27 | 2001-09-26 | $7700.00 | Window Closed / Lapsed |