US5547440A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lung exerciser
Assignee: Individual
•
Filing: 1994-03-28
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Granted: 1996-08-20
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Expires: 2014-03-28
Abstract
Abstract An exercise device for improving the performance of age or disease impaired human respiratory systems. The device depends on the use of a respiratory exerciser which contains a novel piston which does not itself contact internal diameter of the tube in which it is situated except for the interface created by a rubber disk which is centered in the piston.
Inventors
- 👤 Louis C. Rubens
- 👤 Jane R. Rubens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:46
CPC Classifications
A; A63; A63B; A63B23/00; A63B23/18
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
110 words
A lightweight piston for use in a cylindrical tube of the type including two cup-like pieces and at least one flexible disk and a fastening means, each said cup-like piece being configured essentially identical to the other, each said cup-like piece comprising a back and an outside diameter; each said cup-like piece joined to the other cup-like piece in back to back interfacial relationship to form a piston; said cup-like pieces having at least one flexible disk centered between their joined backs; each flexible disk having a diameter larger than the largest outside diameter of the cup-like pieces, said fastening means securing the cup-like pieces and the flexible disk together.
Claim 2
Dependent Claim
110 words
A lightweight piston for use in a cylindrical tube of the type including two cup-like pieces and at least one flexible disk and a fastening means, each said cup-like piece being configured essentially identical to the other, each said cup-like piece comprising a back and an outside diameter; each said cup-like piece joined to the other cup-like piece in back to back interfacial relationship to form a piston; said cup-like pieces having at least one flexible disk centered between their joined backs; each flexible disk having a diameter larger than the largest outside diameter of the cup-like pieces, said fastening means securing the cup-like pieces and the flexible disk together.
Claim 3
Dependent Claim
31 words
A piston as claimed in claim 1 wherein the outside diameter of the largest flexible disk and the largest inside diameter of the tube is a ratio of 1.02 to 1.13.
Claim 4
Dependent Claim
23 words
A piston as claimed in claim 1 wherein two or more flexible disks are present and there is a spacer between the disks.
Claim 5
Dependent Claim
51 words
A piston as claimed in claim 1 wherein the disk is manufactured from a flexible material selected from the group consisting of (i) ethylene-co-propylene rubber; (ii) silicone rubber; (iii) vinyl/nitrile copolymer rubber; (iv) butadiene-co-acrylonitrile rubber; (v) high strength natural latex rubber; (vi) natural rubber sponge, and (vii) thermoplastic block copolymer elastomers.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-08-20 | 2000-02-19 | 2000-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-08-20 | 2004-02-19 | 2004-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-08-20 | 2008-02-19 | 2008-08-20 | $7700.00 | Window Closed / Lapsed |