US3593240A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solenoid structure having single sheet metal plunger and/or yoke
Assignee: Whirlpool Corp
•
Filing: 1969-03-10
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Granted: 1971-07-13
•
Expires: 1989-03-10
Abstract
Abstract An electrical solenoid structure of extremely simple and economical construction. The plunger is stamped from sheet metal and includes an attaching portion unitary therewith. The inner end of the plunger defines a bight portion and the yoke includes a complementary formed portion to provide high magnetic pull as a result of the reduced magnetic gap. The plunger may have ribs arranged to reduce the airgap between the plunger and yoke.
Inventors
- 👤 Frank S Garczynski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:50
CPC Classifications
H; H01; H01F; H01F7/00; H01F7/06; H01F7/08; H01F7/16; H01F7/1607; H01F7/081; H01F2007/083
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
45 words
A solenoid structure comprising: a yoke; a U-shaped plunger formed of a single piece of sheet material and having substantially spaced legs and an attaching portion unitary therewith; and a coil electromagnetically coupled to said yoke for electromagnetically positioning said plunger relative to said yoke.
Claim 2
Dependent Claim
45 words
A solenoid structure comprising: a yoke; a U-shaped plunger formed of a single piece of sheet material and having substantially spaced legs and an attaching portion unitary therewith; and a coil electromagnetically coupled to said yoke for electromagnetically positioning said plunger relative to said yoke.
Claim 3
Dependent Claim
15 words
The solenoid structure of claim 1 wherein said plunger comprises a formed sheet metal stamping.
Claim 4
Dependent Claim
48 words
The solenoid structure of claim 1 wherein said U-shaped plunger includes a convex bight end portion, and said yoke includes a concave portion complementary to said plunger bight portion for providing a narrow flux gap with a long travel stroke of the plunger when said coil is energized.
Claim 5
Dependent Claim
48 words
The solenoid structure of claim 1 wherein said plunger further includes a rib portion formed unitary therewith for decreasing the airgap in the flux path between the yoke and the plunger when said plunger is fully inserted into said yoke as a result of energization of said coil.
Claim 6
Dependent Claim
42 words
The solenoid structure of claim 4 wherein said plunger includes an inner end juxtaposed to said yoke as a result of energization of said coil, and a spring is provided engaging said ribs to bias said plunger from its fully inserted position.
Claim 7
Dependent Claim
92 words
A solenoid structure comprising: a unitary stamped sheet metal yoke folded to define a U-section having a pair of spaced legs, one of said legs including a stamped portion; a plunger extending movably through the other of said legs to adjacent said stamped portion; and a coil electromagnetically coupled to said yoke for electromagnetically positioning said plunger relative to said yoke, said plunger including an inner end portion complementary to said stamped portion for providing a narrow flux gap and a long travel stroke of the plunger when said coil is energized.
Claim 8
Dependent Claim
92 words
A solenoid structure comprising: a unitary stamped sheet metal yoke folded to define a U-section having a pair of spaced legs, one of said legs including a stamped portion; a plunger extending movably through the other of said legs to adjacent said stamped portion; and a coil electromagnetically coupled to said yoke for electromagnetically positioning said plunger relative to said yoke, said plunger including an inner end portion complementary to said stamped portion for providing a narrow flux gap and a long travel stroke of the plunger when said coil is energized.
Claim 9
Dependent Claim
18 words
The solenoid structure of claim 6 wherein said stamped portion comprises a folded portion having slit side edges.
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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) | 1974-07-12 | 1975-01-11 | 1975-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-12 | 1979-01-11 | 1979-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-12 | 1983-01-11 | 1983-07-13 | $7700.00 | Window Closed / Lapsed |