Patent US3840317A successfully refreshed from Google Patents.
US3840317A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two part mold closure and clamping system
Assignee: Desma Werke GmbH
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Filing: 1972-09-11
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Granted: 1974-10-08
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Expires: 1992-09-11
Abstract
Abstract A mold comprising hingedly connected supports movable angularly relative to each other on which are mounted mold parts, abutments on the supports which limit movement of the supports toward each other to positions in which the mold parts are substantially parallel and spaced from each other, guides mounting the mold part on one of the supports for movement at the limiting position of the supports relative to the supports and rectilinearly toward the mold part on the other support, springs holding the movable mold part retracted and linkage operable to move the supports to said limiting position and thereafter to move the movable mold part on the one support into engagement with the mold part on the other support.
Inventors
- 👤 F Koch
- 👤 H Paulsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:20
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/34; B29C44/36; B29C44/38; B29C44/42; B29C44/428; B29C33/00; B29C33/20; B29C33/202
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
176 words
Molding apparatus comprising opposed mold parts, pivotally arranged supports, movable angularly relative to each other about a fixed pivot, means on the supports mutually engagable by angular movement of the supports toward each other to limit such movement to a predetermined spacing, means mounting the mold parts on the supports in parallel relation, the means mounting one of the mold parts operating to yieldably hold the one mold part spaced from the other at said predetermined spacing for rectilinear movement toward the other, first linkage operably connected to the supports such as to swing one support from an angularly retracted position to said predetermined spacing as limited by said mutually engagable means, and second linkage pivotally connected to the first linkage and to the yieldable mold part, said linkages when parallel holding the supports clamped at said predetermined position and the one mold part engaged with the other and when at an angle to each other allowing the one mold part to be retracted rectilinearly and releasing the supports for angular movement relative to each other.
Claim 2
Dependent Claim
176 words
Molding apparatus comprising opposed mold parts, pivotally arranged supports, movable angularly relative to each other about a fixed pivot, means on the supports mutually engagable by angular movement of the supports toward each other to limit such movement to a predetermined spacing, means mounting the mold parts on the supports in parallel relation, the means mounting one of the mold parts operating to yieldably hold the one mold part spaced from the other at said predetermined spacing for rectilinear movement toward the other, first linkage operably connected to the supports such as to swing one support from an angularly retracted position to said predetermined spacing as limited by said mutually engagable means, and second linkage pivotally connected to the first linkage and to the yieldable mold part, said linkages when parallel holding the supports clamped at said predetermined position and the one mold part engaged with the other and when at an angle to each other allowing the one mold part to be retracted rectilinearly and releasing the supports for angular movement relative to each other.
Claim 3
Dependent Claim
146 words
Molding apparatus comprising opposed mold parts, pivotally arranged supports, movable angularly relative to each other about a fixed pivot, means on the supports cooperable to limit movement of the supports toward each other to a predetermined position of confrontation in which the supports are situated in spaced parallel relation, means mounting the mold parts on the supports in parallel relation, the means mounting one of the mold parts comprising guides on the support constrained to move rectilinearly thereon to which the one mold part is attached, said guides being movable on the support from a retracted position in which the one mold part is spaced from the other to an extended position in which the one mold part is engaged with the other mold part, springs holding the guides retracted and linkage operable to extend the guides and simultaneously lock the supports at said parallel position.
Claim 4
Dependent Claim
146 words
Molding apparatus comprising opposed mold parts, pivotally arranged supports, movable angularly relative to each other about a fixed pivot, means on the supports cooperable to limit movement of the supports toward each other to a predetermined position of confrontation in which the supports are situated in spaced parallel relation, means mounting the mold parts on the supports in parallel relation, the means mounting one of the mold parts comprising guides on the support constrained to move rectilinearly thereon to which the one mold part is attached, said guides being movable on the support from a retracted position in which the one mold part is spaced from the other to an extended position in which the one mold part is engaged with the other mold part, springs holding the guides retracted and linkage operable to extend the guides and simultaneously lock the supports at said parallel position.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-07 | 1978-04-08 | 1978-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-07 | 1982-04-08 | 1982-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-07 | 1986-04-08 | 1986-10-08 | $7700.00 | Window Closed / Lapsed |