Patent US3817488A successfully refreshed from Google Patents.
US3817488A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electro-pneumatic device
Assignee: Northeast Fluidics Inc
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Filing: 1973-02-22
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Granted: 1974-06-18
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Expires: 1993-02-22
Abstract
Abstract An air valve or other control device actuated by control of escaping air has a magnetizable shell forming a core, a bottom wall and a cylindrical side wall; the core having a passage for the escaping air, terminating with a nozzle and being surrounded by a solenoid. A metal armature disk of great flexibility has a peripheral portion rigidly engaging the end of the shell wall and a portion which is attracted to the core to close the nozzle when the solenoid is energized. Optionally, a non-magnetic diaphragm covers the armature and is enclosed by a chamber having an inlet for signal air under light pressure such as used by fluidic circuitry. Therefore, the device may be actuated by either a fluidic or electrical signal.
Inventors
- 👤 R Mack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:39
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/02; F16K31/06; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86574; Y10T137/86582; Y10T137/86614
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
304 words
An electro-pneumatic control device including a first air chamber having an inlet for air under pressure and an outlet for this air, a reciprocating valve for said outlet, reciprocating means for receiving the pressure in said chamber over a predetermined area for closing said valve by this pressure, a second air chamber, means for interconnecting said chambers so that said second chamber receives the air pressure in said first chamber, reciprocating means for receiving the air pressure in said second chamber over a predetermined area larger than said first area for opening said valve by this pressure, and a controllable air escape means for said second chamber; wherein the improvement comprises said air escape means including a magnetizable core having an axial passage connecting at one end with said second chamber and having a nozzle at its outer end through which the air escapes from this second chamber. an electric solenoid encircling said core, and a magnetizable armature disk positioned substantially in a plane at right angles to said nozzle and core and spaced a small distance therefrom and having a nozzle-restricting portion movable towards said nozzle a distance restricting the escape of air therefrom when said solenoid is energized, said disk having a peripheral portion which is rigidly positioned and an elastically flexible annular portion between this peripheral portion and said nozzlerestricting portion; said core being formed by round magnetizable shell having said core centrally positioned and at the core''s end remote from said armature disk having an end wall surrounding the core and a round side wall extending to and contacting said peripheral portion of said armature disk so that when said solenoid is energized a magnetic circuit is formed which is substantially closed when said armature disk nozzle-restricting portion is moved for at least the second said distance towards said nozzle.
Claim 2
Dependent Claim
304 words
An electro-pneumatic control device including a first air chamber having an inlet for air under pressure and an outlet for this air, a reciprocating valve for said outlet, reciprocating means for receiving the pressure in said chamber over a predetermined area for closing said valve by this pressure, a second air chamber, means for interconnecting said chambers so that said second chamber receives the air pressure in said first chamber, reciprocating means for receiving the air pressure in said second chamber over a predetermined area larger than said first area for opening said valve by this pressure, and a controllable air escape means for said second chamber; wherein the improvement comprises said air escape means including a magnetizable core having an axial passage connecting at one end with said second chamber and having a nozzle at its outer end through which the air escapes from this second chamber. an electric solenoid encircling said core, and a magnetizable armature disk positioned substantially in a plane at right angles to said nozzle and core and spaced a small distance therefrom and having a nozzle-restricting portion movable towards said nozzle a distance restricting the escape of air therefrom when said solenoid is energized, said disk having a peripheral portion which is rigidly positioned and an elastically flexible annular portion between this peripheral portion and said nozzlerestricting portion; said core being formed by round magnetizable shell having said core centrally positioned and at the core''s end remote from said armature disk having an end wall surrounding the core and a round side wall extending to and contacting said peripheral portion of said armature disk so that when said solenoid is energized a magnetic circuit is formed which is substantially closed when said armature disk nozzle-restricting portion is moved for at least the second said distance towards said nozzle.
Claim 3
Dependent Claim
36 words
The device of claim 1 in which the armature disk''s said nozzle-restricting portion is thicker than its said annular portion to provide an increase in the magnetic flux adjacent to said core of said magnetic circiut.
Claim 4
Dependent Claim
57 words
The device of claim 1 in which a magnetizable annular plate has an outer periphery contacting the shell''s said side wall and an inner periphery adjacent to but radially spaced from said core adjacent to said nozzle, said inner periphery being overlapped by the disk''s said nozzle restricting portion, said plate being thicker than said annular portion.
Claim 5
Dependent Claim
69 words
The device of claim 1 in which the armature disk''s said nozzle-restricting portion is a flat round central portion, said peripheral portion is flat and contacts said wall''s end edge, said portions being radially spaced from each other, and said flexible annular portion is formed by flat arms all curved to the same radius about said disk''s center and interconnecting said nozzle-restricting and peripheral portions, said disk being flat.
Claim 6
Dependent Claim
48 words
The device of claim 4 in which said disk is formed from a single flat piece of extremely thin metal in the order of 0.006 inch thick with its metal removed by etching to form said portions and arms so that the flatness of the metal is unaffected.
Claim 7
Dependent Claim
38 words
The device of claim 4 in which the armature disk''s said nozzle-restricting portion is thicker than its said annular portion to provide an increase in the magnetic flux of said magnetic circuit adjacent to said nozzle and core.
Claim 8
Dependent Claim
56 words
The device of claim 4 in which a magnetizable annular plate has an outer periphery contacting the shell''s said side wall and an inner periphery adjacent to but radially spaced from said core adjacent to said nozzle, said inner periphery being overlapped by the disk''s said nozzle-restricting portion, said plate being thicker than said annular portion.
Claim 9
Dependent Claim
170 words
An air valve of the type actuated by control of escaping air and comprising a cylindrical body containing valving mechanism and having inlet and outlet air ports, said body containing a cylindrical magnetizable shell concentrically forming a core, an annular flat bottom wall and a cylindrical side wall extending in the direction of the core and the latter concentrically having a passage for the escaping air and terminating with a concentric nozzle, said body having a cylindrical wall extending beyond the end edge of said magnetizable side wall and an end wall having an air inlet, a superimposed non-metallic diaphragm and a thin circular metal armature disk between said body''s end wall and the ends of said core and side wall of said shell with said diaphragm on the side facing this shell''s said end wall and close thereto and with said disk spaced very close to said nozzle and contacting the end of the side wall of said shell, and an electric solenoid in said shell encircling said core.
Claim 10
Dependent Claim
170 words
An air valve of the type actuated by control of escaping air and comprising a cylindrical body containing valving mechanism and having inlet and outlet air ports, said body containing a cylindrical magnetizable shell concentrically forming a core, an annular flat bottom wall and a cylindrical side wall extending in the direction of the core and the latter concentrically having a passage for the escaping air and terminating with a concentric nozzle, said body having a cylindrical wall extending beyond the end edge of said magnetizable side wall and an end wall having an air inlet, a superimposed non-metallic diaphragm and a thin circular metal armature disk between said body''s end wall and the ends of said core and side wall of said shell with said diaphragm on the side facing this shell''s said end wall and close thereto and with said disk spaced very close to said nozzle and contacting the end of the side wall of said shell, and an electric solenoid in said shell encircling said core.
Claim 11
Dependent Claim
70 words
The device of claim 8 in which said armature disk has a flat round central portion for engaging said nozzle, a flat peripheral portion for contacting said wall''s edge, said portion being radially spaced from each other, and flat arms all curved to the same radius about said disk''s center and interconnecting said portions, said disk being flat with all of said portions and arms in a single flat plane.
Claim 12
Dependent Claim
48 words
The device of claim 9 in which said disk is formed from a single flat piece of extremely thin metal in the order of 0.006 inch thick with its metal removed by etching to form said portions and arms so that the flatness of the metal is unaffected.
Claim 13
Dependent Claim
49 words
The device of claim 10 in which said diaphragm and disk have peripheral edges slidingly fitting the inside of said body''s cylindrical wall and the latter''s said end wall is removable and holds said diaphragm and disk by their peripheries against the end edge of said shell''s side wall.
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) | 1977-06-17 | 1977-12-17 | 1978-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-17 | 1981-12-17 | 1982-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-17 | 1985-12-17 | 1986-06-18 | $7700.00 | Window Closed / Lapsed |