US4173439A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus having expanding and contracting chamber
Assignee: Individual
•
Filing: 1977-11-28
•
Granted: 1979-11-06
•
Expires: 1997-11-28
Abstract
Abstract An apparatus having at least one alternately expanding and contracting chamber comprises a plurality of cylindrical rollers each having an exterior surface in continuous rolling engagement with two adjacent rollers, the rollers being rotatable along parallel axes, with at least one of the rollers rotating about an eccentric and/or reciprocating axis. The rollers are preferably of equal length with adjacent rollers being in contact substantially along their entire respective lengths, the chamber being defined between the rollers and enclosed at its ends by end plates.
Inventors
- 👤 Walter M. Hopkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:39
CPC Classifications
F; F01; F01B; F01B7/00
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
125 words
An apparatus having at least one alternately expanding and contracting chamber comprising a pair of parallel end plates; a plurality of cylindrical rollers each having their axes parallel to each other, normal to said end plates and in sealing engagement at their ends with the respective adjacent surface of said end plates; each of said rollers having an exterior surface in rolling engagement with two adjacent rollers, said rollers defining with said end plates an enclosed chamber; and wherein at least one of the rollers rotates about an axis eccentric with respect to the axis of said roller to move reciprocally into and out of the chamber formed by said rollers and said end plates, and means communicating between said chamber and the exterior thereof.
Claim 2
Independent Claim
125 words
An apparatus having at least one alternately expanding and contracting chamber comprising a pair of parallel end plates; a plurality of cylindrical rollers each having their axes parallel to each other, normal to said end plates and in sealing engagement at their ends with the respective adjacent surface of said end plates; each of said rollers having an exterior surface in rolling engagement with two adjacent rollers, said rollers defining with said end plates an enclosed chamber; and wherein at least one of the rollers rotates about an axis eccentric with respect to the axis of said roller to move reciprocally into and out of the chamber formed by said rollers and said end plates, and means communicating between said chamber and the exterior thereof.
Claim 3
Dependent Claim
30 words
Apparatus of claim 1 wherein said rollers are elongated, and of substantially equal lengths whereby said rollers are in contact with the adjacent rollers substantially along their entire lengths, respectively.
Claim 4
Dependent Claim
32 words
The apparatus of claim 2 including axles on which said rollers rotate and means connecting the ends of said axles urging said rollers to maintain constant surface engagement for sealing said chamber.
Claim 5
Dependent Claim
10 words
The apparatus of claim 3 comprising six of said rollers.
Claim 6
Independent Claim
81 words
An apparatus having at least one alternately expanding and contracting chamber comprising a plurality of at least six cylindrical rollers each of which has an exterior surface in rolling engagement with two adjacent rollers, said rollers being rotatable along parallel axes, wherein at least one of the rollers rotates about a reciprocating axis; a pair of end plates in sealing engagement with opposite ends of said rollers to complete said chamber, and means communicating between interior and exterior of said chamber.
Claim 7
Independent Claim
81 words
An apparatus having at least one alternately expanding and contracting chamber comprising a plurality of at least six cylindrical rollers each of which has an exterior surface in rolling engagement with two adjacent rollers, said rollers being rotatable along parallel axes, wherein at least one of the rollers rotates about a reciprocating axis; a pair of end plates in sealing engagement with opposite ends of said rollers to complete said chamber, and means communicating between interior and exterior of said chamber.
Claim 8
Dependent Claim
22 words
The apparatus of claim 5 wherein two of said rollers are driven reciprocally and oppositely to alternately expand and contract said chamber.
Claim 9
Independent Claim
202 words
An apparatus having at least one alternately expanding and contracting chamber comprising a pair of parallel end plates; a plurality of cylindrical rollers each having their axes parallel to each other, normal to said end plates and in sealing engagement at their ends with the respective adjacent surface of said end plates, each of said rollers having an exterior surface in rolling engagement with two adjacent rollers, and wherein at least one of the rollers rotates about an axis eccentric with respect to the axis of said roller to move reciprocally into and out of the chamber formed by said rollers and said end plates, and means communicating between said chamber and the exterior thereof, wherein the plurality of rollers comprises six of said rollers, wherein the first and second rollers rotate about eccentric axes, said third, fourth, fifth and sixth rollers each rotate about axes which are movable laterally along parallel planes, said first roller being located between said third and fourth rollers and in contact therewith, said second roller being located between said fifth and sixth rollers and in contact therewith, and whereby said third and fifth rollers are in contact and said fourth and sixth rollers are in contact.
Claim 10
Independent Claim
202 words
An apparatus having at least one alternately expanding and contracting chamber comprising a pair of parallel end plates; a plurality of cylindrical rollers each having their axes parallel to each other, normal to said end plates and in sealing engagement at their ends with the respective adjacent surface of said end plates, each of said rollers having an exterior surface in rolling engagement with two adjacent rollers, and wherein at least one of the rollers rotates about an axis eccentric with respect to the axis of said roller to move reciprocally into and out of the chamber formed by said rollers and said end plates, and means communicating between said chamber and the exterior thereof, wherein the plurality of rollers comprises six of said rollers, wherein the first and second rollers rotate about eccentric axes, said third, fourth, fifth and sixth rollers each rotate about axes which are movable laterally along parallel planes, said first roller being located between said third and fourth rollers and in contact therewith, said second roller being located between said fifth and sixth rollers and in contact therewith, and whereby said third and fifth rollers are in contact and said fourth and sixth rollers are in contact.
Claim 11
Dependent Claim
32 words
The apparatus of claim 7 wherein said first and second rollers are opposite and move toward and away from each other without making contact to alternately contract and expand said chambers respectively.
Claim 12
Dependent Claim
42 words
The apparatus of claim 8 wherein said third and fourth roller axes move laterally and reciprocally along a common first plane, and said fifth and sixth roller axes move laterally and reciprocally along a common second plane, parallel with said first plane.
Claim 13
Dependent Claim
38 words
The apparatus of claim 9 wherein the diameters of said first and second rollers are substantially identical and the diameters of said third, fourth, fifth and sixth rollers are substantially and different from said first and second rollers.
Claim 14
Dependent Claim
27 words
The apparatus of claim 10 wherein the diameter of said first and second rollers is smaller than the diameter of said third, fourth, fifth and sixth rollers.
Claim 15
Dependent Claim
67 words
The apparatus of claim 7 comprising multiples of said expanding and contracting chambers each of which is defined between four corner rollers each rotatable about axes which are movable laterally along parallel planes and two opposed intermediate rollers each located between first and second pair of said corner rollers both rotatable about eccentric axes, said first and second roller pairs being movable along different and parallel planes.
Claim 16
Dependent Claim
27 words
The apparatus of claim 12 comprising at least three pairs of said corner rollers and three of said intermediate rollers and which define two of said chambers.
Claim 17
Dependent Claim
34 words
The apparatus of claim 13 wherein the diameter of said corner rollers are substantially identical and the diameter of said intermediate rollers are substantially identical and smaller than the diameter of said corner rollers.
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) | 1982-11-05 | 1983-05-07 | 1983-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-11-05 | 1987-05-07 | 1987-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-11-05 | 1991-05-07 | 1991-11-06 | $7700.00 | Window Closed / Lapsed |