Patent US3561371A successfully refreshed from Google Patents.
US3561371A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extruder door
Assignee: Nestle Purina PetCare Co
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Filing: 1969-04-10
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Granted: 1971-02-09
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Expires: 1989-04-10
Abstract
Abstract An extruder is provided with an end plate having a hinge pin on one side thereof and an angled abutment surface on the other side thereof. The extruder door is provided with a slot adapted to receive the hinge pin and an abutment surface for engagement with the angled surface of the end plate. A shaft is connected to the door and provided with means for reciprocal movement for controlling the movement of the extruder door with respect to the end plate. More particularly, when the shaft is moved in one direction, the abutment faces of the door and end plate are disengaged, permitting said door to be pivoted away from the end plate. When the shaft is moved in the opposite direction, the abutment faces of the door and end plate are brought into engagement, thereby forcing the door into fluidtight engagement with the end plate.
Inventors
- 👤 Charles K Kummer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:07
CPC Classifications
A; A21; A21C; A21C11/00; A21C11/16
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
137 words
An extruder door assembly adapted for use with an extruder which conveys material therethrough, comprising an end plate on said extruder having an opening therein for the material to pass therethrough, an extruder door pivotably connected to said end plate and having an opening therein adapted for alignment with said end plate opening, an angled surface on said extruder door engageable with said end plate, and control means connected to said extruder door for controlling the movement of said angled surface on said end plate, said control means being responsive to a manual force to move said angled surface between a position disengaged from said end plate and a position in locking engagement with said end plate to establish a pressure fluid seal between said end plate and extruder door about said end plate and door openings.
Claim 2
Dependent Claim
137 words
An extruder door assembly adapted for use with an extruder which conveys material therethrough, comprising an end plate on said extruder having an opening therein for the material to pass therethrough, an extruder door pivotably connected to said end plate and having an opening therein adapted for alignment with said end plate opening, an angled surface on said extruder door engageable with said end plate, and control means connected to said extruder door for controlling the movement of said angled surface on said end plate, said control means being responsive to a manual force to move said angled surface between a position disengaged from said end plate and a position in locking engagement with said end plate to establish a pressure fluid seal between said end plate and extruder door about said end plate and door openings.
Claim 3
Dependent Claim
41 words
The extruder door assembly according to claim 1 including another angled surface on said end plate, said first named angled surface on said extruder door being moveable on said other angled surface for urging said extruder door toward said end plate.
Claim 4
Dependent Claim
112 words
The extruder door assembly according to claim 2 wherein said control means comprises a threaded rod member connected to said extruder door, a hub member threadily received on said rod member, a slot having opposed sides in said end plate for receiving said hub member, said hub member being engageable with the opposed sides of said slot to limit the movement thereof on said threaded rod, said hub member being movable in response to a manual force into engagement with one of said opposed sides of said slot and thereafter the manual force being effective to move said rod member and urge said first named angled surface along said other angled surface.
Claim 5
Dependent Claim
114 words
The extruder door assembly according to claim 1, including a pivot pin in said end plate, a slot in said door adapted to receive said pivot pin for pivotal connection of said door to said end plate, said slot permitting pivotal movement of said door about said pivot pin as well as permitting horizontal movement of said door a second angled surface on said end plate adapted to receive said first named angled surface on said extruder door, said control means being effective to urge said first named angled surface along said second angled surface to move said door toward the position establishing the fluid pressure seal between saId end plate and said door.
Claim 6
Dependent Claim
30 words
The extruder door assembly according to claim 4 wherein the sides of said slot are positioned at an angle substantially the same as the angle of said second angled surface.
Claim 7
Dependent Claim
38 words
The extruder door assembly according to claim 1, including an annular seal in said end plate about said end plate opening, said extruder door being movable into engagement with said annular seal to establish the pressure fluid seal.
Claim 8
Dependent Claim
87 words
The extruder door assembly according to claim 2 wherein said control means includes a rod attached to said extruder door, said rod being movable between a first position permitting said door to be moved to a position for pivotable movement about said pin and a second position establishing engagement between said first named and other angled surface, said rod being movable in response to a manual force when in the second position to effect the movement of said first named angled surface on said other angled surface.
Claim 9
Dependent Claim
165 words
The extruder door assembly according to claim 7, including a slot in said end plate for receiving said rod, an opening having opposed sides in said end plate intermediate said slot, said control means including a hub member adapted for insertion into said opening, said hub member being engageable with the opposed sides of said opening to restrict its movement, said hub member being movable on said rod into engagement with one of said opposed walls in response to a manual force in a first direction and thereafter the manual force in the first direction being effective to move said rod in a first direction toward the first position, and said hub member being movable into engagement with the other of said opposed walls in response to a manual force in the opposite direction and thereafter the manual force in the opposite direction being effective to move said rod in the opposite direction to urge said first named angled surface along said other angled surface.
Claim 10
Dependent Claim
92 words
The extruder door assembly according to claim 8, including a hinge pin in said end plate, slot means in said door for receiving said hinge pin, movement of said rod in the first direction serves to urge said door along said hinge pin and said first named angled surface toward a position disengaged from said other angled surface to permit said extruder door to be moved out of the pressure fluid seal with said end plate and permits said door to be pivoted about said hinge pin away from said end plate.
Claim 11
Dependent Claim
61 words
The extruder door assembly according to claim 8, including a hinge pin in said end plate, slot means in said extruder door for receiving said hinge pin, said slot means being provided in said door at an angle to the opening in said door substantially similar to the angle said other angled surface defines with the opening in said end 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) | 1974-02-08 | 1974-08-10 | 1975-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-08 | 1978-08-10 | 1979-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-08 | 1982-08-10 | 1983-02-09 | $7700.00 | Window Closed / Lapsed |