US3867291A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for cleaning filters
Assignee: Industrial Filter and Pump Manufacturing Co
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Filing: 1973-01-12
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Granted: 1975-02-18
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Expires: 1993-01-12
Abstract
Abstract Filter cake is dislodged from a filter element by vibrating the element at a plurality of different frequencies and amplitudes to develop a modulated wave pattern in the element.
Inventors
- 👤 Jr Henry Schmidt
- 👤 Bruce Durham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:18
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/39; B01D29/62; B01D29/70; B01D29/72; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86389; Y10T137/86405; Y10T137/86413
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
140 words
Apparatus for vibrating a filter element, comprising vibrator means for vibrating at a first frequency in response to the application thereto of fluid at a first pressure, and for vibrating at a second frequency in response to the application thereto of fluid at a second pressure, means connecting said vibrator means to said filter elements, first and second conduits connected between a source of fluid under pressure and said vibrator, a restrictive orifice in one of said conduits and means for alternately closing said conduits including, a valve having an inlet connected to said source of fluid, first and second outlets respectively connected to said first and second conduits, and a valve element movable between a first position wherein said inlet is connected to said first outlet and a second position wherein said inlet is connected to said second outlet.
Claim 2
Dependent Claim
140 words
Apparatus for vibrating a filter element, comprising vibrator means for vibrating at a first frequency in response to the application thereto of fluid at a first pressure, and for vibrating at a second frequency in response to the application thereto of fluid at a second pressure, means connecting said vibrator means to said filter elements, first and second conduits connected between a source of fluid under pressure and said vibrator, a restrictive orifice in one of said conduits and means for alternately closing said conduits including, a valve having an inlet connected to said source of fluid, first and second outlets respectively connected to said first and second conduits, and a valve element movable between a first position wherein said inlet is connected to said first outlet and a second position wherein said inlet is connected to said second outlet.
Claim 3
Dependent Claim
38 words
Apparatus according to claim 1, comprising fluid operated means for moving said valve element between said first and second positions, and means for adjusting the time periods during which said valve element is in each of said positions.
Claim 4
Dependent Claim
31 words
Apparatus according to claim 2, comprising pressure regulating means connected between said valve and said source of fluid under pressure, and means connecting said first outlet to said fluid operated means.
Claim 5
Dependent Claim
20 words
Apparatus according to claim 2 wherein said pressure regulating means comprises means for adjusting the pressure at the outlet thereof.
Claim 6
Dependent Claim
113 words
In combination with a pressure filter having a plurality of filter elements mounted in a filter tank, vibrator means having a frequency of vibration which varies with the pressure of an operating fluid supplied thereto, means connecting said vibrator means to said filter elements to vibrate said elements, conduit means for supplying operating fluid to said vibrator means at substantially different pressures, and presettable means for alternately supplying said operating fluid to said conduit means at two substantially different pressure valves, said presettable means including an adjustable timer for presetting the rate of alternation between said pressure values of the operating fluid supplied to said conduit means and thus to said vibrator means.
Claim 7
Dependent Claim
113 words
In combination with a pressure filter having a plurality of filter elements mounted in a filter tank, vibrator means having a frequency of vibration which varies with the pressure of an operating fluid supplied thereto, means connecting said vibrator means to said filter elements to vibrate said elements, conduit means for supplying operating fluid to said vibrator means at substantially different pressures, and presettable means for alternately supplying said operating fluid to said conduit means at two substantially different pressure valves, said presettable means including an adjustable timer for presetting the rate of alternation between said pressure values of the operating fluid supplied to said conduit means and thus to said vibrator means.
Claim 8
Dependent Claim
29 words
In the combination set forthe in claiM 5, said presettable means comprising adjustable means for presetting the relative durations of application of said pressure values to said vibrator means.
Claim 9
Dependent Claim
19 words
In the combination set forth in claim 5, said presettable mens comprising adjustable means for presetting said pressure values.
Claim 10
Dependent Claim
35 words
In the combination set forth in claim 5, said presettable means comprising means for abruptly changing the pressures of said operating fluid supplied to said conduit means from one of said values to the other.
Claim 11
Dependent Claim
35 words
In the combination set forth in claim 8, said vibrator means and said presettable means are pneumatically operated, and said means for abruptly changing the pressure of said fluid is a pneumatically operated pilot valve.
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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) | 1978-02-17 | 1978-08-19 | 1979-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-17 | 1982-08-19 | 1983-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-17 | 1986-08-19 | 1987-02-18 | $7700.00 | Window Closed / Lapsed |