Patent US4285661A successfully refreshed from Google Patents.
US4285661A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve nozzle of injection molding machine
Assignee: Osaka City Government
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Filing: 1979-11-30
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Granted: 1981-08-25
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Expires: 1999-11-30
Abstract
Abstract A valve nozzle is used at an end of a hot runner or an injection molding machine for an injection molding. The valve nozzle comprises a cylinder as a body of the nozzle, and a piston. The cylinder has a gate and has a larger inner diameter at the rear end and a smaller inner diameter at the front end. The piston has a passage in the piston and has a large outer diameter at the rear end and a smaller outer diameter at the front end.
Inventors
- 👤 Akira Yotsutsuji
- 👤 Seiichi Ueda
- 👤 Kiyoshi Uemura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:40
CPC Classifications
B; B29; B29C; B29C45/00; B29C45/17; B29C45/26; B29C45/27; B29C45/28; B29C45/2806; B29C45/20; B29C45/23; B29C45/234; B29C2045/2882
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
184 words
A valve nozzle for an injection molding machine cooperable with a mold cavity, comprising: a cylinder; a longitudinal bore in said cylinder, said bore having a first portion of a first predetermined diameter at a first end of said cylinder and a second portion of second predetermined diameter at a second end of said cylinder, said second diameter being smaller than said first diameter; an injection molding compound inlet to said bore at said first end; an injection molding compound outlet from said bore at said second end, said outlet extending perpendicular to said bore; a piston slidable in said bore, said piston having a first portion of said first predetermined diameter at said first end and a second portion of said second predetermined diameter at said second end, said piston including at least one passage extending through said first and second portions; a valve stem extending from said piston toward said outlet and extendable into said mold cavity; and a valve fixed to said stem adjacent said outlet, said valve forming a disk coaxial with said bore and seating upon said perpendicular outlet.
Claim 2
Dependent Claim
184 words
A valve nozzle for an injection molding machine cooperable with a mold cavity, comprising: a cylinder; a longitudinal bore in said cylinder, said bore having a first portion of a first predetermined diameter at a first end of said cylinder and a second portion of second predetermined diameter at a second end of said cylinder, said second diameter being smaller than said first diameter; an injection molding compound inlet to said bore at said first end; an injection molding compound outlet from said bore at said second end, said outlet extending perpendicular to said bore; a piston slidable in said bore, said piston having a first portion of said first predetermined diameter at said first end and a second portion of said second predetermined diameter at said second end, said piston including at least one passage extending through said first and second portions; a valve stem extending from said piston toward said outlet and extendable into said mold cavity; and a valve fixed to said stem adjacent said outlet, said valve forming a disk coaxial with said bore and seating upon said perpendicular outlet.
Claim 3
Dependent Claim
19 words
A valve nozzle according to claim 1 which further comprises a spring pushing the piston towards said first end.
Claim 4
Dependent Claim
29 words
A valve nozzle according to claim 1 which further comprises a stopper for controlling a position of the shifting of the piston, at the first portion of the piston.
Claim 5
Dependent Claim
19 words
A valve nozzle according to claim 1 which further comprises a sliding holder on said stem near said valve.
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) | 1984-08-24 | 1985-02-23 | 1985-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-08-24 | 1989-02-23 | 1989-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-08-24 | 1993-02-23 | 1993-08-25 | $7700.00 | Window Closed / Lapsed |