US3883930A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety pin
Assignee: Safety Snap Pin Corp
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Filing: 1973-12-07
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Granted: 1975-05-20
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Expires: 1993-12-07
Abstract
Abstract Safety pin with base-supported pin shaft and locking clasp having rigid wing members at opposite sides of the shaft point, the wing members including inwardly overhanging buttressed portions having spaced parallel flanges to form a guide slot for the shaft point, a spring strip biased upwardly against and bridging said portions and yielding to applied shaft pressure for movement of the shaft under the strip into locking position.
Inventors
- 👤 Dante V Bagnasco
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 00:29
CPC Classifications
A; A44; A44B; A44B9/00; A44B9/12; A44B9/14; Y; Y10; Y10T; Y10T24/00; Y10T24/46; Y10T24/4604; Y10T24/4634; Y10T24/4652; Y10T24/4664; Y10T24/4668; Y10T24/4671
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
225 words
A safety pin of the character described having supporting base structure, a pin shaft mounted thereon with opening bias, wing members mounted at opposite sides respectively of the base structure and having inwardly extending overhanging portions with the respective opposing edges spaced from each other, and a spring strip that is mounted on the base structure and biased to bridge the respective undersides of the overhanging portions for retaining the pin shaft in closed position, wherein the improvement comprises: a. a rigid flange extending transversely and outwardly from each of the opposing edges of the overhanging portions to form a pin guide slot generally parallel to the pin shaft and overlying the spring strip; b. the spring strip having oppositely inclined cam faces that extend into the guide slot and each cam face forming with the adjacent guide flange a generally V-shape trough respectively to receive the pin shaft; c. the pin on entering the trough engaging the corresponding rigid guide flange and cam face to cam downwardly the spring strip, thereby allowing the pin to move laterally from the strip and beneath the corresponding overhanging portion; d. and buttressing means located on the outer sides of the wing members and along the overhanging portions respectively, to join the corresponding flanges and maintain the flanges and wing members rigid with respect to the spring strip.
Claim 2
Dependent Claim
225 words
A safety pin of the character described having supporting base structure, a pin shaft mounted thereon with opening bias, wing members mounted at opposite sides respectively of the base structure and having inwardly extending overhanging portions with the respective opposing edges spaced from each other, and a spring strip that is mounted on the base structure and biased to bridge the respective undersides of the overhanging portions for retaining the pin shaft in closed position, wherein the improvement comprises: a. a rigid flange extending transversely and outwardly from each of the opposing edges of the overhanging portions to form a pin guide slot generally parallel to the pin shaft and overlying the spring strip; b. the spring strip having oppositely inclined cam faces that extend into the guide slot and each cam face forming with the adjacent guide flange a generally V-shape trough respectively to receive the pin shaft; c. the pin on entering the trough engaging the corresponding rigid guide flange and cam face to cam downwardly the spring strip, thereby allowing the pin to move laterally from the strip and beneath the corresponding overhanging portion; d. and buttressing means located on the outer sides of the wing members and along the overhanging portions respectively, to join the corresponding flanges and maintain the flanges and wing members rigid with respect to the spring strip.
Claim 3
Dependent Claim
43 words
A safety pin as specified in claim 1 wherein the buttressing means includes a stiffening ridge that extends at least in part along the outer surface of each wing member and along the overhanging portion and is joined to the corresponding guide flange.
Claim 4
Dependent Claim
43 words
A safety pin as specified in claim 1 wherein the buttressing means comprise members that extend from opposite sides of the base structure and along and over the outer sides of the wing members and overhanging portions respectively, in rigid backing relation thereto.
Claim 5
Dependent Claim
42 words
A safety pin as specified in claim 3 wherein the base structure includes a base plate on which the wing members are mounted and a support plate for the base plate and the buttressing members are integrally joined to the support plate.
Claim 6
Dependent Claim
31 words
A safety pin as specified in claim 4 wherein portions extend laterally from the buttressing members respectively, to form with the support plate an end enclosure for the spring strip mounting.
Claim 7
Dependent Claim
29 words
A safety pin as specified in claim 5 wherein the end wall of the enclosure has spaced abuttments for supporting the spring strip and for anchoring the pin shaft.
Claim 8
Dependent Claim
27 words
A safety pin as specified in claim 6 wherein the support plate, buttressing members and end enclosure are of plastic material and together form a molded unit.
Claim 9
Dependent Claim
36 words
A safety pin as specified in claim 6 wherein the spring strip has a reversely bent extension that is secured to the support plate and includes an angular portion that seats on the end enclosure abuttments.
Claim 10
Dependent Claim
57 words
A safety pin as specified in claim 4 wherein the opposing ends of the buttressing members at the pin guide slot are rigidly joined by a bridging member across the slot at one end thereof, and the bridging and buttressing members, together with the support plate therefor, are of plastic material and together form a molded unit.
Claim 11
Dependent Claim
32 words
A safety pin as specified in claim 3 wherein the buttressing members are joined at the opposing edges thereof by a rigid bridging member extending across one end of the guide slot.
References Cited (Backward Citations)
US1310929A
Cited
US1233253A
Cited
US2433171A
Cited
US2546662A
Cited
US2760247A
Cited
US3018533A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-19 | 1978-11-18 | 1979-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-19 | 1982-11-18 | 1983-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-19 | 1986-11-18 | 1987-05-20 | $7700.00 | Window Closed / Lapsed |