US4596912A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Push-button switch
Assignee: Alps Alpine Co Ltd
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Filing: 1985-02-20
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Granted: 1986-06-24
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Expires: 2005-02-20
Abstract
Abstract A push-button switch for use in the keyboard of an electronic typewriter, word processor, or the like comprises a casing, a stem extending through the casing for operating a movable contact, a top cover mounted on the outer end of the stem, a cylinder of an elastomeric material disposed between the top cover and the casing and loosely mounted on the outer periphery of the stem, and a circular retaining plate protruding from the outer end of the stem. The cylinder which biases the stem upward is resiliently mounted between the retaining plate and the casing, whereby the cylinder is maintained in a fixed condition.
Inventors
- 👤 Yoichi Hattori
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:20
CPC Classifications
H; H01; H01H; H01H13/00; H01H13/02; H01H13/12; H01H13/20; H01H13/50; H01H13/52; H01H9/00; H01H9/02; H01H9/04; H01H9/041
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
A push-button switch comprising: a casing; a stem extending through the casing and acting to operate a contact; a top cover mounted on the outer end of the stem; a cyliner of rubber disposed between the top cover and the casing for biasing the stem, the cylinder being loosely mounted on the outer periphery of the stem; and a retaining means protruding from the outer end of the stem, the retaining means being a circular plate having downwardly extending portions which are fitted in holes formed in the stem, the cylinder being resiliently mounted between the retaining means and the casing.
Claim 2
Dependent Claim
101 words
A push-button switch comprising: a casing; a stem extending through the casing and acting to operate a contact; a top cover mounted on the outer end of the stem; a cyliner of rubber disposed between the top cover and the casing for biasing the stem, the cylinder being loosely mounted on the outer periphery of the stem; and a retaining means protruding from the outer end of the stem, the retaining means being a circular plate having downwardly extending portions which are fitted in holes formed in the stem, the cylinder being resiliently mounted between the retaining means and the casing.
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) | 1989-06-23 | 1989-12-23 | 1990-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-06-23 | 1993-12-23 | 1994-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-06-23 | 1997-12-23 | 1998-06-24 | $7700.00 | Window Closed / Lapsed |