Patent US3894309A successfully refreshed from Google Patents.
US3894309A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Grommet for protecting a pipe inserted in an opening of a plate
Assignee: Nifco Inc
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Filing: 1974-03-07
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Granted: 1975-07-15
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Expires: 1994-03-07
Abstract
Abstract Disclosed is a synthetic thermoplastic resin grommet which is useful for protecting a pipe from surface injury which would be otherwise caused by rubbing of the pipe against the periphery of the associated opening of a plate.
Inventors
- 👤 Takuo Yuda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:42
CPC Classifications
B; B65; B65D; B65D59/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
133 words
A one piece annular grommet having top and bottom protions and defining therebetween a body of predetermined thickness of a synthetic thermoplastic material and comprising an arcuate body of more than 180* of the peripheral measurement of the grommet, two arc portions comprising the remainder of the periphery of said body, each arc portion having an integral hinge at the terminus of said arcuate body and a third hinge connecting said two arc portions and arcuate body capable of being flexed to diminish its diametral dimension to permit its mounting on the margin of an aperture in a complimentary work piece and tab means projecting from the top and bottom portions of said body adapted to engage opposite surfaces of the complimentary work piece with which the grommet is adapted to be associated.
Claim 2
Dependent Claim
133 words
A one piece annular grommet having top and bottom protions and defining therebetween a body of predetermined thickness of a synthetic thermoplastic material and comprising an arcuate body of more than 180* of the peripheral measurement of the grommet, two arc portions comprising the remainder of the periphery of said body, each arc portion having an integral hinge at the terminus of said arcuate body and a third hinge connecting said two arc portions and arcuate body capable of being flexed to diminish its diametral dimension to permit its mounting on the margin of an aperture in a complimentary work piece and tab means projecting from the top and bottom portions of said body adapted to engage opposite surfaces of the complimentary work piece with which the grommet is adapted to be associated.
Claim 3
Dependent Claim
44 words
An annular grommet accordiNg to claim 1 wherein a tongue comprises an extension from one of said arc portions, and the other arc portion has a recess which is so complementary to said tongue as to accommodate said tongue when fitted in said recess.
Claim 4
Dependent Claim
23 words
An annular grommet according to claim 1 wherein said hinge portions comprise a notched portion provided to the periphery of the annular body.
Claim 5
Dependent Claim
24 words
An annular grommet according to claim 1 wherein said tab means defines an annular groove provided on the outer periphery of the annular body.
Claim 6
Dependent Claim
28 words
An annular grommet according to claim 2 wherein said recess has a catch projection which functions to catch the end of said tongue when fitted in said recess.
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) | 1978-07-14 | 1979-01-13 | 1979-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-14 | 1983-01-13 | 1983-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-14 | 1987-01-13 | 1987-07-15 | $7700.00 | Window Closed / Lapsed |