Patent US3673924A successfully refreshed from Google Patents.
US3673924A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid motors
Assignee: Individual
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Filing: 1970-10-05
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Granted: 1972-07-04
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Expires: 1990-10-05
Abstract
Abstract A resilient expansible chamber device having constricting rollers mounted around a resilient tube member. The controlled application of fluid pressure to the chamber and the simultaneous venting of fluid pressure from the chamber, on opposite sides of the constricting rollers, causes the constricting rollers to move relative to the expansible chamber.
Inventors
- 👤 Zdzislaw Zakrzewski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:49
CPC Classifications
F; F15; F15B; F15B15/00; F15B15/08; F15B15/10; F01; F01B; F01B19/00; F01B19/04; F15B15/106
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
124 words
An expansible chamber fluid motor including: a resilient hollow tube member, a single constricting means disposed external to and about said tube member and being movable therealong, a plurality of flexible diaphragms within said tube member defining a plurality of compartments therein, said plurality of diaphragms and said constricting means effective to separate said tube member compartments into pressure and exhaust chambers as said constricting means moves therealong, a fluid passage communicating with each of said chambers adjacent opposite sides of said diaphragm, and control means to direct motive fluid from a pressure source to said pressure chamber and to release fluid from said exhaust chamber, whereby said constricting means and said tube member are capable of continuous unidirectional movement relative to each other.
Claim 2
Dependent Claim
124 words
An expansible chamber fluid motor including: a resilient hollow tube member, a single constricting means disposed external to and about said tube member and being movable therealong, a plurality of flexible diaphragms within said tube member defining a plurality of compartments therein, said plurality of diaphragms and said constricting means effective to separate said tube member compartments into pressure and exhaust chambers as said constricting means moves therealong, a fluid passage communicating with each of said chambers adjacent opposite sides of said diaphragm, and control means to direct motive fluid from a pressure source to said pressure chamber and to release fluid from said exhaust chamber, whereby said constricting means and said tube member are capable of continuous unidirectional movement relative to each other.
Claim 3
Dependent Claim
29 words
An expansible chamber fluid motor as defined in claim 1 in which: said constricting means includes a plurality of rollers, means urging said rollers inwardly against said tube member.
Claim 4
Dependent Claim
63 words
An expansible chamber fluid motor as defined in claim 1 in which: said control means includes a four-way valve to connect said pressure source to one of said chambers and to connect the other of said chambers to a drain when in a first position, and to connect said pressure source and drain respectively to the opposite chambers when In a second position.
Claim 5
Dependent Claim
23 words
An expansible chamber fluid motor as defined in claim 2 in which: said constricting means includes a yoke structure to mount the same.
Claim 6
Dependent Claim
32 words
An expansible chamber fluid motor as defined in claim 2 in which: said constricting means is mounted to a stationary member and said tube member constitutes the displacement member of said motor.
Claim 7
Dependent Claim
21 words
An expansible chamber fluid motor as defined in claim 1 wherein said hollow tube member is of a closed curvilinear configuration.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-04 | 1976-01-03 | 1976-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-04 | 1980-01-03 | 1980-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-04 | 1984-01-03 | 1984-07-04 | $7700.00 | Window Closed / Lapsed |