US4276459A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Paddle switch safety button
Assignee: Ingersoll Rand Co
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Filing: 1980-06-16
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Granted: 1981-06-30
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Expires: 2000-06-16
Abstract
Abstract A paddle switch safety button which prevents the paddle switch from being activated prior to the safety button being depressed. A unique multi cross section stem of the safety button cooperates with a U-shaped cutout in the paddle switch lever. The stem interferes with the lever in its extended position and passes in the U-shaped notch in the depressed position to allow the paddle switch lever to be operated.
Inventors
- 👤 Daniel E. Willett
- 👤 John A. Boothroyd
- 👤 William F. Langlais
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:01
CPC Classifications
H; H01; H01H; H01H9/00; H01H9/02; H01H9/06; H01H3/00; H01H3/02; H01H3/20
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
198 words
A safety switch assembly comprising: a substantially linear elongate paddle switch lever attached to a tool at its one end by pivot means; said paddle switch lever having a hollow U-shaped cross-section with a recess formed in each of the opposite wall sections of the "U"; said recess being formed in the other end of said paddle switch lever; a safety button means mounted for translation along an axis perpendicular to the longitudinal axis of said elongate paddle switch lever; a first portion of said safety button means having a cross section which fits into said recess; a second portion of said safety button means having a cross section which interferes with said paddle switch lever to prevent its rotation about said pivot means, whereby the paddle switch is prevented in its operation; said safety button means being located towards the other end of said paddle switch lever; said safety button means being comprised of a multi cross section plunger element which coacts with said recess when said safety button means is translated along its axis from its normal position to its depressed position; and said safety button means being biased towards its normal position by a spring.
Claim 2
Dependent Claim
198 words
A safety switch assembly comprising: a substantially linear elongate paddle switch lever attached to a tool at its one end by pivot means; said paddle switch lever having a hollow U-shaped cross-section with a recess formed in each of the opposite wall sections of the "U"; said recess being formed in the other end of said paddle switch lever; a safety button means mounted for translation along an axis perpendicular to the longitudinal axis of said elongate paddle switch lever; a first portion of said safety button means having a cross section which fits into said recess; a second portion of said safety button means having a cross section which interferes with said paddle switch lever to prevent its rotation about said pivot means, whereby the paddle switch is prevented in its operation; said safety button means being located towards the other end of said paddle switch lever; said safety button means being comprised of a multi cross section plunger element which coacts with said recess when said safety button means is translated along its axis from its normal position to its depressed position; and said safety button means being biased towards its normal position by a spring.
Claim 3
Dependent Claim
33 words
A safety switch assembly according to claim 1 wherein: said safety button means has a plurality of reduced cross sections which cooperate with a plurality of recesses formed in said paddle switch lever.
Claim 4
Dependent Claim
24 words
A safety switch assembly according to claim 1 wherein: said paddle switch lever operates an electrical switch means to turn on a power tool.
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) | 1984-06-29 | 1984-12-29 | 1985-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-06-29 | 1988-12-29 | 1989-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-06-29 | 1992-12-29 | 1993-06-30 | $7700.00 | Window Closed / Lapsed |