Patent US5645874A successfully refreshed from Google Patents.
US5645874A
Expired / Lapsed
US
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Multiple gate injection nozzle
Assignee: OSCO Inc
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Filing: 1992-08-31
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Granted: 1997-07-08
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Expires: 2012-08-31
Abstract
Abstract A multiple gate injection nozzle is described in which individual insert heaters are utilized, each associated with a respective probe to allow different probe lengths without upsetting proper temperature conditions at each gate. A main heater is also used encircling the main body of the nozzle. Replaceable copper sealing rings expand to a greater extent than the steel main body to increase the sealing pressure during operation.
Inventors
- 👤 Jesus'M. Osuna-Diaz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 22:34
CPC Classifications
B; B29; B29C; B29C45/00; B29C45/17; B29C45/26; B29C45/27; B29C45/2725; B29C45/30; B29C2045/2729
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
158 words
A multiple gate injection nozzle comprising: a generally cylindrical main body; a central flow passage extending axially into said main body formed with a seal pocket at one end of said main body adapted to mate with an injection machine; a circular array of gates extending out of said main body at an other end opposite said one end; a circumferential array of elongated probes each disposed in a corresponding axial bore in said main body, each probe having a tip at one end disposed in a respective gate; an annular space surrounding each probe and extending into said gate; a radial cross passage extending from each annular space to said central flow passage; a copper sealing ring encircling each annular space and having a side protruding from said other end of said main body to enable contact with a mold plate an elongated insert heater disposed within each probe enabling direct heating of each of said probes.
Claim 2
Dependent Claim
158 words
A multiple gate injection nozzle comprising: a generally cylindrical main body; a central flow passage extending axially into said main body formed with a seal pocket at one end of said main body adapted to mate with an injection machine; a circular array of gates extending out of said main body at an other end opposite said one end; a circumferential array of elongated probes each disposed in a corresponding axial bore in said main body, each probe having a tip at one end disposed in a respective gate; an annular space surrounding each probe and extending into said gate; a radial cross passage extending from each annular space to said central flow passage; a copper sealing ring encircling each annular space and having a side protruding from said other end of said main body to enable contact with a mold plate an elongated insert heater disposed within each probe enabling direct heating of each of said probes.
Claim 3
Dependent Claim
39 words
The injection nozzle according to claim 1 wherein said main body is constructed of steel whereby a differential expansion of said steel main body and said copper sealing rings during heating causes increased sealing pressure on said mold plate.
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) | 2000-07-07 | 2001-01-06 | 2001-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-07-07 | 2005-01-06 | 2005-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-07-07 | 2009-01-06 | 2009-07-08 | $7700.00 | Window Closed / Lapsed |