US3761204A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Positive displacement boosters
Assignee: PAULIUKONIS GRAZINA I
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Filing: 1971-12-06
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Granted: 1973-09-25
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Expires: 1991-12-06
Abstract
Abstract A series of simple booster pumps operating as positive displacement pumps driven by either pneumatic or hydraulic power cylinders simply attached to the respective pump chambers which receive piston rods upon each cylinder stroke, controllable as to its length by an adjustable stop-plug thereby displacing fluid from pump chamber at pressures proportional to the ratios of rod diameters versus piston diameter, with or without integral check valves in the inlet or outlet ports of the pump chamber, with a shuttle valve built-in in the inlet port of the design for handling aerated fluids such as grease, eggnog or the like, and a built-in outlet check valve in the same pump chamber, and appropriate seals separating the actuation power cylinder from the pressurization pump chamber by a threaded connection representing the only means for connecting actuator to the pump chamber and providing simple booster pump construction with provisions for capacity change by virtue of interchanging cylinders from one size of a given maximum capacity to another size with completely different boosting and volume control capabilities, all with extreme easiness and simplicity, mandatory in pollution control equipment manufacture, among other vital applications.
Inventors
- 👤 R Pauliukonis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:43
CPC Classifications
F; F04; F04B; F04B9/00; F04B9/08; F04B9/10; F04B9/103; F04B9/107; F04B49/00; F04B49/12; F04B53/00; F04B53/10; F04B53/12; F04B53/121
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
310 words
A positive displacement booster pump comprising: a power cylinder having a power piston slidably disposed therein,a fluid supply and exhaust port provided at one end of the power cylinder for actuation of said power piston, a piston rod of a diameter less than said piston connected to said piston on the side opposite the supply and exhaust port, said piston rod extending through a cylinder-rod end boss at the other end of the power cylinder, said cylinder-rod end boss being externally threaded and provided with an external seal groove with a seal disposed therein, a compression spring disposed around said piston rod, one end of said spring abutting the power piston and the other end abutting an elongated end closure member, said end closure member having a central opening for accomodation of said piston rod and being internally threaded for mating with said power cylinder, a sealing groove in said end closure member having a seal disposed therein for sliding engagement with said piston rod, the opposite end of said end closure member being threaded externally and provided with a peripheral groove with a seal disposed therein, a vent in said end closure member, an elongated pump chamber being internally threaded at one end for mating with said end closure member, inlet and outlet means in said pump chamber, the other end of said pump chamber being internally threaded and having an externally threaded plug secured therein, a seal disposed around said plug, an externally threaded stop member disposed in said pump chamber and axially positioned by rotation thereof, an adjusting slot provided in said stop member to facilitate rotation, whereby the postion of said stop member determines the length of travel of said piston rod and thus the volumetric displacement of teh pump chamber, a passage extending through said stop member to equalize the pressure on both sides thereof.
Claim 2
Dependent Claim
310 words
A positive displacement booster pump comprising: a power cylinder having a power piston slidably disposed therein,a fluid supply and exhaust port provided at one end of the power cylinder for actuation of said power piston, a piston rod of a diameter less than said piston connected to said piston on the side opposite the supply and exhaust port, said piston rod extending through a cylinder-rod end boss at the other end of the power cylinder, said cylinder-rod end boss being externally threaded and provided with an external seal groove with a seal disposed therein, a compression spring disposed around said piston rod, one end of said spring abutting the power piston and the other end abutting an elongated end closure member, said end closure member having a central opening for accomodation of said piston rod and being internally threaded for mating with said power cylinder, a sealing groove in said end closure member having a seal disposed therein for sliding engagement with said piston rod, the opposite end of said end closure member being threaded externally and provided with a peripheral groove with a seal disposed therein, a vent in said end closure member, an elongated pump chamber being internally threaded at one end for mating with said end closure member, inlet and outlet means in said pump chamber, the other end of said pump chamber being internally threaded and having an externally threaded plug secured therein, a seal disposed around said plug, an externally threaded stop member disposed in said pump chamber and axially positioned by rotation thereof, an adjusting slot provided in said stop member to facilitate rotation, whereby the postion of said stop member determines the length of travel of said piston rod and thus the volumetric displacement of teh pump chamber, a passage extending through said stop member to equalize the pressure on both sides thereof.
Claim 3
Dependent Claim
200 words
A positive displacement booster pump as defined in claim 1 including valve means in said inlet and outlet means of said pump chamber, said valve means in said inlet means having a circular shuttle valve member disposed around said piston rod inside said pump chamber, one end of said shuttle member shouldered externally and slightly tapered internally abutting said cylinder-rod end boss when the piston rod is in the retracted position and the other end of said shuttle member tapered, a seal in a peripheral groove of said piston rod in the vicinity of said shuttle shoulder for the frictional engagement and the position change of the shuttle, said pump chamber having an enlarged portion terminating with a tapered inner end wall at said inlet means and being adapted to slidably receive said shuttle, said shuttle closing said inlet means when the piston rod is in the extended position with the respective tapers of the shuttle member and the enlarged portion of the central bore meeting, an air vent means entering said pump chamber through a side wall, check valve means in said outlet means including spring adjustment for pressure control through a spool with seals disposed around said spool.
Claim 4
Dependent Claim
21 words
A positive displacement booster pump as defined in claim 1 wherein said power cylinder is made from anticorrosive materials including plastics.
Claim 5
Dependent Claim
18 words
A positive displacement booster pump as defined in claim 1 wherein said pump chamber is made from plastics.
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) | 1976-09-24 | 1977-03-26 | 1977-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-24 | 1981-03-26 | 1981-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-24 | 1985-03-26 | 1985-09-25 | $7700.00 | Window Closed / Lapsed |