Patent US3801256A successfully refreshed from Google Patents.
US3801256A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Breech mechanism including self-aligning breech blocks
Assignee: Improved Machinery Inc
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Filing: 1972-04-21
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Granted: 1974-04-02
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Expires: 1992-04-21
Abstract
Abstract A molding machine of the type comprising tie rods mounted to one platen which are received by breech mechanisms associated with a second platen. Each breech mechanism comprises a plurality of cooperative breech blocks driven towards-and-away from one another by individual cylinder-and-piston actuators which exert equal, oppositely directed moving forces on the breech blocks. The breech blocks are mounted for lateral and longitudinal movement relative to their respective tie rods, thereby enabling the breech blocks to be self-aligning with the tie rods and accommodating tie rod stretch.
Inventors
- 👤 R Farrell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:42
CPC Classifications
B; B29; B29C; B29C45/00; B29C45/17; B29C45/64; B29C45/67; B29C45/6707; B29C45/6714; B29C45/6728; Y; Y10; Y10T; Y10T74/00; Y10T74/20; Y10T74/20576; Y10T74/20636
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
196 words
In a molding machine, a first platen, a second platen movable towards-and-away from said first platen, at least one tie rod mounted to one of said platens longitudinally projecting from said one platen towards the other thereof, a breech mechanism associated with said other platen for gripping said tie rod, said breech mechanism including a purality of breech blocks cooperative to grip a therebetween tie rod and movable towardsand-away from one another, actuating means for moving each of said breech blocks towards-and-away from the other, said actuating means comprising individual pressure fluid operated cylinder-and-piston actuators for each of said breech blocks, means mounting said breech blocks for movement longitudinally of said tie rod and also laterally of said tie rod to permit selfalignment of said breech blocks with a therebetween tie rod during movement of the breech blocks towards one another, said mounting means for each said breech block including rod means on the opposite side of said other platen from said one platen and extending longitudinally of said tie rod, carriage means connected to the breech block, and shoe means mounting said carriage means on said rod means for both longitudinal and lateral movement thereon.
Claim 2
Dependent Claim
196 words
In a molding machine, a first platen, a second platen movable towards-and-away from said first platen, at least one tie rod mounted to one of said platens longitudinally projecting from said one platen towards the other thereof, a breech mechanism associated with said other platen for gripping said tie rod, said breech mechanism including a purality of breech blocks cooperative to grip a therebetween tie rod and movable towardsand-away from one another, actuating means for moving each of said breech blocks towards-and-away from the other, said actuating means comprising individual pressure fluid operated cylinder-and-piston actuators for each of said breech blocks, means mounting said breech blocks for movement longitudinally of said tie rod and also laterally of said tie rod to permit selfalignment of said breech blocks with a therebetween tie rod during movement of the breech blocks towards one another, said mounting means for each said breech block including rod means on the opposite side of said other platen from said one platen and extending longitudinally of said tie rod, carriage means connected to the breech block, and shoe means mounting said carriage means on said rod means for both longitudinal and lateral movement thereon.
Claim 3
Dependent Claim
27 words
A molding machine according to claim 1, wherein said cylinder-and-piston actuators are constructed to cause equal oppositely directed moving forces to be exerted on said breech blocks.
Claim 4
Dependent Claim
19 words
A molding machine according to claim 1, wherein said cylinder-and-piston actuators are on opposite sides of said breech blocks.
Claim 5
Dependent Claim
22 words
A molding machine according to claim 1, further comprising supply means for supplying pressure fluid at common pressure to said cylinder-and-piston actuators.
Claim 6
Dependent Claim
34 words
A molding machine according to claim 4, wherein said supply means comprises a supply conduit communicating with a source of the pressure fluid, and branch conduits connecting said supply conduit with said cylinder-and-piston actuators.
Claim 7
Dependent Claim
57 words
A molding machine according to claim 1, wherein said cylinder-and-piston actuators are constructed to cause pressure fluid at common pressure to exert equal, oppositely directed forces on said breech blocks during their movement towards one another, and further comprising supply means for supplying fluid at common pressure to said cylinder-and-pressure actuators to sO move said breech blocks.
Claim 8
Dependent Claim
33 words
A molding machine according to claim 6, wherein said supply means comprises a supply conduit communicating with a source of pressure fluid and branch conduits connecting said supply conduit with said cylinder-and-piston actuators.
Claim 9
Dependent Claim
36 words
A molding machine according to claim 1, wherein each said shoe means comprises arcuate bearing surface means slidably engaging a said rod means and also keying surface means keying said carriage means to the shoe means.
Claim 10
Dependent Claim
71 words
A molding machine according to claim 1, wherein each said rod means comprises a plurality of horizontal slide rods, each said shoe means comprises a plurality of shoe members each having an arcuate bearing surface alidably on one of said slide rods and also a keying surface keying a said carriage means to the shoe member, and further comprising vertical slide rod means mounting said breech blocks to said carriage means.
Claim 11
Dependent Claim
32 words
A molding machine according to claim 9, wherein the said keying surface of each said shoe member is bounded adjacent opposite ends of the shoe member by retaining portions of the latter.
Claim 12
Dependent Claim
151 words
In a molding machine, a first platen, a second platen movable towards-and-away from said first platen, at least one tie rod mounted to one of said platens longitudinally projecting from said one platen towards the other thereof, a breech mechanism associated with said other platen for gripping said tie rod, said breech mechanism including a plurality of breech blocks cooperative to grip a therebetween tie rod and movable towards-and-away from one another, motor means for moving each said breech block towards-and-away from the other, and means mounting said breech blocks for movement both longitudinally and laterally to said tie rod, said mounting means for each said breech block comprising rod means on the opposite side of said other platen from said one platen and extending longitudinally of said tie rod, and carriage means connected to the breech block and mounted on said rod means for both longitudinal and lateral movement thereon.
Claim 13
Dependent Claim
151 words
In a molding machine, a first platen, a second platen movable towards-and-away from said first platen, at least one tie rod mounted to one of said platens longitudinally projecting from said one platen towards the other thereof, a breech mechanism associated with said other platen for gripping said tie rod, said breech mechanism including a plurality of breech blocks cooperative to grip a therebetween tie rod and movable towards-and-away from one another, motor means for moving each said breech block towards-and-away from the other, and means mounting said breech blocks for movement both longitudinally and laterally to said tie rod, said mounting means for each said breech block comprising rod means on the opposite side of said other platen from said one platen and extending longitudinally of said tie rod, and carriage means connected to the breech block and mounted on said rod means for both longitudinal and lateral movement thereon.
Claim 14
Dependent Claim
27 words
A molding machine according to claim 11, wherein each said mounting means further comprises shoe means mounting the carriage means on the rod means for movement thereon.
Claim 15
Dependent Claim
22 words
A molding machine according to claim 12, wherein said shoe means is separate from both said carriage means and said rod means.
Claim 16
Dependent Claim
72 words
A molding machine according to claim 13, wherein each said rod means comprises a plurality of horizontal slide rods, each said shoe means comprises a corresponding plurality of shoe members each having an arcuate bearing surface slidably on one of said slide rods and also a keying surface keying a said carriage means to the shoe member, and further comprising vertical slide rod means mounting said breech blocks to said carriage means.
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) | 1977-04-01 | 1977-10-01 | 1978-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-01 | 1981-10-01 | 1982-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-01 | 1985-10-01 | 1986-04-02 | $7700.00 | Window Closed / Lapsed |