US3572980A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resonant pump using flat disc springs
Assignee: Rotron Inc
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Filing: 1969-02-17
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Granted: 1971-03-30
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Expires: 1989-02-17
Abstract
Abstract A preferred embodiment of the invention described herein provides a device for raising the pressure of a volume of fluid comprising, a solenoid-operated piston and cylinder unit having a valve structure associated therewith for controlling the intake and exhaust of the fluid and a suitable electrical energy source for energizing the solenoid. The piston is supported within the cylinder by a flat disc spring that not only provides the required restoring forces, but seals the space between the piston and cylinder and effectively enlarges the working area of the piston.
Inventors
- 👤 Joseph S Hollyday
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:24
CPC Classifications
F; F04; F04B; F04B43/00; F04B43/0009; F04B43/0054; F04B35/00; F04B35/04; F04B35/045; F04B45/00; F04B45/04; F04B45/043; F04B45/047
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
147 words
A pump for pressurizing a fluid, comprising: a first cylinder having means associated therewith for controlling the intake and exhaust of fluid; a first piston movable relative to the cylinder for causing the intake and exhaust of the fluid in response to movement of the piston; solenoid means operatively associated with the piston for moving the piston in a first direction from an initial position; means for coupling said solenoid means to a source of periodic electrical energy; and disc spring means coupled between the piston and the cylinder for returning the piston to its initial position, said disc spring means having a spring rate matched to the mass of the moving parts coupled thereto and the frequency of the periodic electrical energy supplied by said source for engendering vibration of the moving parts at a resonant frequency in response to application of said periodic electrical energy.
Claim 2
Dependent Claim
147 words
A pump for pressurizing a fluid, comprising: a first cylinder having means associated therewith for controlling the intake and exhaust of fluid; a first piston movable relative to the cylinder for causing the intake and exhaust of the fluid in response to movement of the piston; solenoid means operatively associated with the piston for moving the piston in a first direction from an initial position; means for coupling said solenoid means to a source of periodic electrical energy; and disc spring means coupled between the piston and the cylinder for returning the piston to its initial position, said disc spring means having a spring rate matched to the mass of the moving parts coupled thereto and the frequency of the periodic electrical energy supplied by said source for engendering vibration of the moving parts at a resonant frequency in response to application of said periodic electrical energy.
Claim 3
Dependent Claim
21 words
A pump as defined in claim 1 wherein the diameter of the piston is substantially less than that of the cylinder.
Claim 4
Dependent Claim
47 words
A pump as defined in claim 2 wherein the disc spring means comprises a flat plate secured to the outer periphery of the piston and to the inner periphery of the cylinder so as to form a part of the gas enclosure and also a seal therefor.
Claim 5
Dependent Claim
33 words
A pump as defined in claim 3 including a second disc spring associated with the piston and cylinder, the second disc spring being concentric with and axially spaced from the other disc spring.
Claim 6
Dependent Claim
34 words
A pump as defined in claim 1 wherein a second disc spring is associated with the piston and cylinder, the second disc spring being concentric with and axially spaced from the other disc spring.
Claim 7
Dependent Claim
40 words
A pump as defined in claim 1 wherein the solenoid means comprises an armature secured to the bottom of the piston, and a stack of E-shaped magnetic laminations carried by the cylinder to form a magnetic circuit with the armature.
Claim 8
Dependent Claim
28 words
A pump as defined in claim 6 wherein a coil is carried around the inner leg of the laminations for generating a magnetic flux in the magnetic circuits.
Claim 9
Dependent Claim
43 words
A pump as defined in claim 1 having one and only one solenoid means and further comprising a second piston and cylinder spaced from the first piston and cylinder and force-transmitting means connecting said first and second pistons to provide a double-acting pump.
Claim 10
Dependent Claim
24 words
A pump as defined in claim 8 wherein the force-transmitting means comprises at least one plate secured to both the first and second pistons.
Claim 11
Dependent Claim
22 words
The pump as defined in claim 8, wherein the second piston and cylinder are axially spaced from the first piston and cylinder.
Claim 12
Dependent Claim
36 words
The pump as defined in claim 6 and further comprising a second piston and cylinder spaced from the first piston and cylinder and force-transmitting means connecting said first and second pistons to provide a double-acting pump.
Claim 13
Dependent Claim
24 words
The pump as defined in claim 11, wherein the force-transmitting means comprises at least one plate secured to both the first and second pistons.
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) | 1974-03-29 | 1974-09-28 | 1975-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-29 | 1978-09-28 | 1979-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-29 | 1982-09-28 | 1983-03-30 | $7700.00 | Window Closed / Lapsed |