US3816032A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metering pump
Assignee: Durion Co Inc
•
Filing: 1972-09-13
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Granted: 1974-06-11
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Expires: 1992-09-13
Abstract
Abstract A pump has a reservoir containing a supply of driving fluid. Mounted within the reservoir is a drive mechanism for reciprocating a piston within a cylinder. The drive mechanism has an eccentrically mounted member which is slidably surrounded by a sliding block, the latter being enclosed by a cross-head which is connected to the piston and confined so as to reciprocate within the pump. Thus, roary motion is converted to oscillating motion in the sliding block, and the oscillating motion is then converted to reciprocating motion in the cross-head, the reciprocating motion then being transmitted to the piston. Two elastomeric tubes have their ends mounted within the pump so as to permit distortion (expansion or compression) of the central portions of the tubes. In the preferred embodiment of the invention, a displacement chamber is defined between the piston and the inner surface of the first tube, and an intermediate chamber is defined between the outer surfaces of the tubes, the intermediate chamber containing an intermediate driving fluid. As the piston reciprocates, driving fluid alternately passes into and out of the displacement chamber to cause the first tube to alternate between a first configuration, and a second configuration, which in turn causes the second tube to do likewise via the intermediate driving fluid. As a result of the alternating configurations assumed by the second tube, process fluid is pumped through the second tube. Other modifications are also disclosed.
Inventors
- 👤 J Flynn
- 👤 W Priese
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:36
CPC Classifications
F; F04; F04B; F04B49/00; F04B49/12; F04B49/121; F04B43/00; F04B43/0009; F04B43/0081; F04B43/009; F04B43/08; F04B43/10; F04B43/107
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
387 words
An improved pump which comprises: a housing defining a cylinder therein; a piston slidably mounted within the cylinder; drive means for effecting relative reciprocation of said piston in said clyinder; a pumping head in operative communication with said cylinder, said pumping head comprising: a housing; a first flexible tube having an inner surface and an outer surface, the ends of said first tube being mounted within the housing so as to permit distortion of the central portion of the first tube; internal limit sleeve means disposed within said first flexible tube, and external sleeve means disposed about the exterior of said first tube; means for confining a volume of driving fluid between the piston and the inner surface of the first tube during the reciprocation of said piston to cause said first tube to alternate between a first configuration and a second, expanded configuration; a flexible second tube having an inner surface and an outer surface, the ends of the second tube being mounted within the housing so as to permit distortion of the central portion thereof; an external limit sleeve disposed about the periphery of said second flexible tube; means including the exterior surface of the first tube, the inner wall surfaces of the housing and the outer surface of the second tube defining an intermediate chamber, said intermediate chamber being adapted to contain a given volume of intermediate fluid, the second tube being adapted to alternate between the first configuration and a second configuration during expansion and contraction of said first flexible tube; means including valve means and the internal surface of said second tube, defining a pumping chamber through which a process fluid is pumped as a result of the alternating configuration assumed by said second tube; said first tube being constructed of an elastomeric material having a high modulous of elasticity, said external limit sleeve about the exterior of said first tube confining the expansion thereof on the piston displacement stroke, such that said expansion does not exceed the elastic limits of said first tube, said first tube thus absorbing and storing latent energy during expansion, and giving up said energy upon contraction during the suction stroke of the piston to maintain the driving fluid at a pressure level sufficient to prevent any dissolved gases in said fluid from coming out of solution.
Claim 2
Dependent Claim
387 words
An improved pump which comprises: a housing defining a cylinder therein; a piston slidably mounted within the cylinder; drive means for effecting relative reciprocation of said piston in said clyinder; a pumping head in operative communication with said cylinder, said pumping head comprising: a housing; a first flexible tube having an inner surface and an outer surface, the ends of said first tube being mounted within the housing so as to permit distortion of the central portion of the first tube; internal limit sleeve means disposed within said first flexible tube, and external sleeve means disposed about the exterior of said first tube; means for confining a volume of driving fluid between the piston and the inner surface of the first tube during the reciprocation of said piston to cause said first tube to alternate between a first configuration and a second, expanded configuration; a flexible second tube having an inner surface and an outer surface, the ends of the second tube being mounted within the housing so as to permit distortion of the central portion thereof; an external limit sleeve disposed about the periphery of said second flexible tube; means including the exterior surface of the first tube, the inner wall surfaces of the housing and the outer surface of the second tube defining an intermediate chamber, said intermediate chamber being adapted to contain a given volume of intermediate fluid, the second tube being adapted to alternate between the first configuration and a second configuration during expansion and contraction of said first flexible tube; means including valve means and the internal surface of said second tube, defining a pumping chamber through which a process fluid is pumped as a result of the alternating configuration assumed by said second tube; said first tube being constructed of an elastomeric material having a high modulous of elasticity, said external limit sleeve about the exterior of said first tube confining the expansion thereof on the piston displacement stroke, such that said expansion does not exceed the elastic limits of said first tube, said first tube thus absorbing and storing latent energy during expansion, and giving up said energy upon contraction during the suction stroke of the piston to maintain the driving fluid at a pressure level sufficient to prevent any dissolved gases in said fluid from coming out of solution.
Claim 3
Dependent Claim
82 words
A pump as defined in claim 1, wherein said housing includes a relatively movable sleeve which defines said clyinder, said sleeve having port means formeD therein and communicating with a reservoir for operating fluid, means mounting said sleeve for axial movement relative to said piston and said housing, such that the point in the piston stroke wherein said piston blocks said port means and exerts compressive, displacement force on the operating fluid may be varied, thereby varying the displacement of said pump.
Claim 4
Dependent Claim
78 words
A pump as defined in claim 2 wherein said mounting means comprises a threaded coaxial extension on said sleeve, a threaded member mounted coaxially of said sleeve and in threaded driving engagement with said threaded extension operating means extending exteriorly of said housing for effecting rotation of said threaded member, and means journalling said threaded member to said housing in a fixed, axial position, whereby rotation thereof will produce axial movement of said sleeve relative to said piston.
Claim 5
Dependent Claim
60 words
An improved pump according to claim 1, which includes means defining a reservoir within the housing for containing a supply of the driving fluid, and means for periodically placing the inner surface of the first tube in communication with the supply of driving fluid during the reciprocation of the piston, and wherein the drive means is disposed within the reservoir.
Claim 6
Dependent Claim
55 words
An improved pump according to claim 1, comprises which a relief valve for passing a portion of the volume of driving fluid to a reservoir if a predetermined pressure is reached during the reciprocation of the piston, and wherein the housing further includes means permitting visual observation of the driving fluid passing to the reservoir.
Claim 7
Dependent Claim
101 words
An improved pump according to claim 1, wherein the drive means comprises: a. a first member having a circular cross-section, the first member being eccentrically mounted within the housing to rotate about an axis of rotation which is normal to the cross-section; b. means at least partially surrounding the cross-section in sliding relationship to the first member; and c. means for causing the surrounding means to reciprocate within the housing during the rotation of the first member, and means connecting the piston to the surrounding means so as to cause the piston to reciprocate during the rotation of the first member.
Claim 8
Dependent Claim
62 words
An improved pump according to claim 6, wherein the surrounding means comprises: a. a second member surrounding the cross-section in sliding relationship to the first member; and b. a crosshead, the crosshead being connected to the piston and having means for holding the second member in a position along the axis of rotation so as to be driven by the first member.
Claim 9
Dependent Claim
53 words
An improved pump according to claim 7, wherein the crosshead also includes means for operatively connecting a second piston thereto, and the housing includes a cover removably mounted adjacent the latter means, the construction and arrangement being such that when the cover is removed, the second piston can be connected to the crosshead.
Claim 10
Dependent Claim
53 words
An improved pump according to claim 1, wherein the drive means includes means for connecting a second piston thereto, and the housing includes a cover removably mounted adjacent the latter means, the construction and arrangement being such that when the cover is removed, the second piston can be connected to the drive means.
Claim 11
Dependent Claim
92 words
An improved pump according to claim 1, wherein the housing further defines a reservoir for containing a supply of the driving fluid, and the drive means further comprises: a. a shaft mounted within the housing for rotation about the axis of rotation, the first member being connected to the shaft so as to rotate therewith; b. a worm gear connected to the shaft so as to rotate therewith; and c. a worm disposed in driving relationship to the worm gear, the drive means being at least partially disposed within the reservoir. 9
Claim 12
Dependent Claim
41 words
An improved pump according to claim 10, wherein the housing includes a removably mounted cap which is disposed in line with the path of the crosshead to provide for thE insertion of a tool to disconnect the piston from the crosshead.
References Cited (Backward Citations)
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Cited
FR1033222A
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US2827853A
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Cited
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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) | 1977-06-10 | 1977-12-10 | 1978-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-10 | 1981-12-10 | 1982-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-10 | 1985-12-10 | 1986-06-11 | $7700.00 | Window Closed / Lapsed |