US3783477A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Snap fastener
Assignee: Individual
•
Filing: 1971-09-08
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Granted: 1974-01-08
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Expires: 1991-09-08
Abstract
Abstract The invention comprises a single or two piece snap fastener comprising a head and depending shank arranged to snap engage with a second part. A washer having a bore slightly less than the diameter of the shank is mounted on the shank. The washer has the inner-edge portion thereof directed away from the head so that the edge bites into the shank and firmly resists forces tending to move the washer along the shank away from the head. The fastener is fixed onto clothing, fabric or other material by clamping the material between the washer and the head of the fastener.
Inventors
- 👤 W Hallam
- 👤 R Hamilton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:43
CPC Classifications
A; A44; A44B; A44B17/00; A44B17/0029; Y; Y10; Y10S; Y10S411/00; Y10S411/918; Y10T; Y10T24/00; Y10T24/45; Y10T24/45225; Y10T24/45471; Y10T24/45524; Y10T24/45545; Y10T24/4555; Y10T24/45565; Y10T24/45571
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
156 words
A snap fastener comprising a first part molded in one piece of synthetic plastic material and comprising a head portion, a shank extending normally from the head portion, and a hollow bulbous portion extending axially from the free end of the shank, said shank having a substantially cylindrical outer surface terminating at an annular end surface defining a shoulder between the shank and the bulbous portion, with the diameter of the cylindrical shank being greater than the maximum diametrical dimension of the bulbous portion, the bulbous portion being sized for snap engagement within an undercut bore of a second part, and a washer mounted on the cylindrical shank, said washer having an inner edge portion bent out of the plane of the washer and directed away from the head portion, said inner edge portion being frictionally engaged with the cylindrical shank to resist forces tending to move the washer along the shank away from the head.
Claim 2
Dependent Claim
156 words
A snap fastener comprising a first part molded in one piece of synthetic plastic material and comprising a head portion, a shank extending normally from the head portion, and a hollow bulbous portion extending axially from the free end of the shank, said shank having a substantially cylindrical outer surface terminating at an annular end surface defining a shoulder between the shank and the bulbous portion, with the diameter of the cylindrical shank being greater than the maximum diametrical dimension of the bulbous portion, the bulbous portion being sized for snap engagement within an undercut bore of a second part, and a washer mounted on the cylindrical shank, said washer having an inner edge portion bent out of the plane of the washer and directed away from the head portion, said inner edge portion being frictionally engaged with the cylindrical shank to resist forces tending to move the washer along the shank away from the head.
Claim 3
Dependent Claim
71 words
A snap fastener as defined in claim 1, wherein said second part comprises a head portion, a shank extending normally from the head, said shank having the undercut bore therein to receive the bulbous portion of the shank of the first part in snap engagement, and a washer on the shank of the second part, said washer being formed with an outwardly turned inner edge portion to engage with the shank.
Claim 4
Dependent Claim
63 words
A snap fastener as defined in claim 2, wherein each washer has an inwardly turned outer edge portion, and the heads of each part are each provided with a rim projecting therefrom in the direction of the shank, and material is clamped between the heads and the washers with the inwardly turned outer edge portion of each washer clamping material on said rims.
Claim 5
Dependent Claim
23 words
A snap fastener as defined in claim 2, wherein the head portion of each part is dished in the direction of the shank.
Claim 6
Dependent Claim
42 words
A snap fastener as defined in claim 1, wherein said bulbous portion has at least one longitudinal slot or channel in the wall thereof, the slot or channel facilitating resilient deformation of the bulbous portion for snap engagement with the second part.
Claim 7
Dependent Claim
33 words
A snap fastener as defined in claim 1, wherein the second part comprises a member secured to a support, and an undercut bore means to receive the bulbous portion of said first part.
References Cited (Backward Citations)
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Cited
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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) | 1977-01-07 | 1977-07-09 | 1978-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-07 | 1981-07-09 | 1982-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-07 | 1985-07-09 | 1986-01-08 | $7700.00 | Window Closed / Lapsed |