US3851359A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Disposable safety pin
Assignee: Individual
•
Filing: 1973-05-02
•
Granted: 1974-12-03
•
Expires: 1993-05-02
Abstract
Abstract A safety pin construction which, once fastened, can not be reopened. The head of the pin includes an interior chamber having a one-way access flap for inserting the point of the shank in closing the pin. Both legs of the pin shank have frangible portions for severing the head of the pin from the shank and the interior chamber is so sized as to capture the point when the head is broken away from the shank.
Inventors
- 👤 L Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:26
CPC Classifications
A; A44; A44B; A44B9/00; A44B9/12; A44B9/18; Y; Y10; Y10T; Y10T24/00; Y10T24/46; Y10T24/4604; Y10T24/4664; Y10T24/4666; Y10T24/50; Y10T24/505
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
368 words
A disposable safety pin which, having once been fastened, cannot be reopened, said safety pin comprising: an arcuately bowed shank having first and second leg portions integrally connected at the lower ends thereof by a resiliently flexible portion; a first frangible portion integrally joined to the upper end of said first leg portion and having a larger dimension lying in the plane of said shank and having a reduced dimension substantially normal to the plane of said shank to provide a first weakened line of severance within the plane of said shank; a second frangible portion integrally joined to the upper end of said second leg portion and having a larger dimension lying in the plane of said shank and having a reduced dimension substantially normal to the plane of said shank to provide a second weakened line of severance within the plane of said shank; a fabric piercing point portion integrally joined to said second frangible portion and having a greater dimension from which said portion tapers to a sharp point; a safety pin head element integrally connected to said first frangible portion; and capture means associated with said head for permanently retaining the point of said shank when the safety pin has been fastened, said capture means including: an interior chamber within said head and of sufficient dimensions to receive said point portion; an elongate opening disposed in the bottom of said head and adjoining said interior chamber, said opening being slightly greater in width than said reduced dimension of said second frangible portion and being smaller in width than said greater dimension of said point portion and thereby adapted to receive said second frangible portion for reciprocal movement therein; and a resiliently flexible closure member associated with said head and communicating with said interior chamber to admit said point portion to said chamber and said second frangible portion to said opening, but to prevent removal of said point portion from said chamber; whereby, once the safety pin is fastened with the point portion captured within said interior chamber, removal of the safety pin may be accomplished by fracture of the first and second frangible portions in order to separate said head element from said shank.
Claim 2
Dependent Claim
368 words
A disposable safety pin which, having once been fastened, cannot be reopened, said safety pin comprising: an arcuately bowed shank having first and second leg portions integrally connected at the lower ends thereof by a resiliently flexible portion; a first frangible portion integrally joined to the upper end of said first leg portion and having a larger dimension lying in the plane of said shank and having a reduced dimension substantially normal to the plane of said shank to provide a first weakened line of severance within the plane of said shank; a second frangible portion integrally joined to the upper end of said second leg portion and having a larger dimension lying in the plane of said shank and having a reduced dimension substantially normal to the plane of said shank to provide a second weakened line of severance within the plane of said shank; a fabric piercing point portion integrally joined to said second frangible portion and having a greater dimension from which said portion tapers to a sharp point; a safety pin head element integrally connected to said first frangible portion; and capture means associated with said head for permanently retaining the point of said shank when the safety pin has been fastened, said capture means including: an interior chamber within said head and of sufficient dimensions to receive said point portion; an elongate opening disposed in the bottom of said head and adjoining said interior chamber, said opening being slightly greater in width than said reduced dimension of said second frangible portion and being smaller in width than said greater dimension of said point portion and thereby adapted to receive said second frangible portion for reciprocal movement therein; and a resiliently flexible closure member associated with said head and communicating with said interior chamber to admit said point portion to said chamber and said second frangible portion to said opening, but to prevent removal of said point portion from said chamber; whereby, once the safety pin is fastened with the point portion captured within said interior chamber, removal of the safety pin may be accomplished by fracture of the first and second frangible portions in order to separate said head element from said shank.
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) | 1977-12-02 | 1978-06-03 | 1978-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-02 | 1982-06-03 | 1982-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-02 | 1986-06-03 | 1986-12-03 | $7700.00 | Window Closed / Lapsed |