US4800629A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plastic buckle
Assignee: Nifco Inc
•
Filing: 1987-12-22
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Granted: 1989-01-31
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Expires: 2007-12-22
Abstract
Abstract A very safe buckle, formed of plastic, is provided which enables a strap to be inserted and clamped easily and quickly, and which prevents the strap from being inadvertently loosened or pulled free of the buckle no matter how the strap or the buckle is pulled about. The buckle is comprised of two adjacent bars spanning the space between the sides of the buckle. The strap is passed between the two bars. One of the bars is rotatable and has a polygonal cross-section, the arrangement being such that the rotation of the rotatable bar reduces the size of the gap between the rotatable bar and the other bar, which is fixed, thereby clamping the strap securely between the bars.
Inventors
- 👤 Yasuhiko Ikeda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:37
CPC Classifications
A; A44; A44B; A44B11/00; A44B11/25; A44B11/02; A44B11/06; A44B11/12; A44B11/005; A44B11/26; A44B11/266; Y; Y10; Y10T; Y10T24/00; Y10T24/40; Y10T24/4002; Y10T24/4012; Y10T24/4016; Y10T24/4088; Y10T24/4093
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
161 words
A plastic buckle comprising: (a) a stationary bar and a rotatable bar provided adjacent to each other across a space between two opposed side members for fixing a strap inserted between said stationary bar and said rotatable bar; (b) said stationary bar being fixed to said two opposed side members and having an abutment portion formed on an inner surface thereof facing said rotatable bar; (c) said rotatable bar: (i) having a peripheral surface which, in use, is surrounded once by said strap; (ii) having a non-circular cross-section, (iii) being rotatably supported on said two opposed side members, and (iv) having two acute angle portions formed on edges of opposite sides thereof; and (d) one of said two acute angle portions being brought into abutment against said abutment portion of said stationary bar when a tension force is exerted on said strap to rotate said rotatable bar, thereby clamping said strap between said one acute angle portion and said abutment portion.
Claim 2
Dependent Claim
161 words
A plastic buckle comprising: (a) a stationary bar and a rotatable bar provided adjacent to each other across a space between two opposed side members for fixing a strap inserted between said stationary bar and said rotatable bar; (b) said stationary bar being fixed to said two opposed side members and having an abutment portion formed on an inner surface thereof facing said rotatable bar; (c) said rotatable bar: (i) having a peripheral surface which, in use, is surrounded once by said strap; (ii) having a non-circular cross-section, (iii) being rotatably supported on said two opposed side members, and (iv) having two acute angle portions formed on edges of opposite sides thereof; and (d) one of said two acute angle portions being brought into abutment against said abutment portion of said stationary bar when a tension force is exerted on said strap to rotate said rotatable bar, thereby clamping said strap between said one acute angle portion and said abutment portion.
Claim 3
Dependent Claim
23 words
A plastic buckle according to claim 1 wherein said two acute angle portions are symmetrical relative to the axis of said rotatable bar.
Claim 4
Dependent Claim
15 words
A plastic buckle according to claim 2 wherein said rotatable bar has a rhombus-shaped cross-section.
References Cited (Backward Citations)
US416985A
Cited
US1718274A
Cited
US2903774A
Cited
JPS54144244A
Cited
US4395803A
Cited
US4493135A
Cited
US4502188A
Cited
US4577377A
Cited
US4542630A
Cited
GB2169027A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-01-31 | 1992-08-01 | 1993-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-01-31 | 1996-08-01 | 1997-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-01-31 | 2000-08-01 | 2001-01-31 | $7700.00 | Window Closed / Lapsed |