US3630319A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Elevator and door and loading mechanisms therefor
Assignee: San Francisco Elevator Co Inc
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Filing: 1969-12-12
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Granted: 1971-12-28
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Expires: 1989-12-12
Abstract
Abstract A dumbwaiter-type elevator capable of being employed in an elevator shaft having hatchways disposed at peripherally spaced locations therearound. To accommodate the peripherally spaced hatchways the elevator car is provided with a rotatable loadsupporting carriage and self-contained driving and indexing mechanisms for the carriage. The carriage is provided with selectively extensible and retractable load-transferring mechanism to accommodate the smooth transition of a load between the hatchways and the car and maintain the load in a level condition while in the car. The car also carries powered closure members which are movable between open and closed conditions relative to the load-supporting carriage. The hatchways are provided with doors and a selectively operable mechanism is provided to move the doors between open and closed conditions responsive to corresponding movement of the closure members. A common hydraulic power circuit carried by the car powers all mechanisms supported on the car and, through the operation of the closure member, also powers the hatchway doors.
Inventors
- 👤 Harold Marven Peterson
- 👤 Scott F Andersen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:42
CPC Classifications
B; B66; B66B; B66B11/00; B66B11/0065; B66B11/008; B66B11/009; B66B11/006
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
244 words
In combination with an elevator car movable within a shaft to and from generally oppositely disposed relationship to a hatchway, said hatchway having a door mounted thereon for slidable movement relative thereto in a predetermined path between open and closed conditions, the improvement comprising: a. a closure member carried by the car, said member being movable between open and closed conditions in a path generally parallel to the path of the hatchway door; b. operating means carried by the car to effect the selective movement of the member between the open and closed conditions; c. at least one pin mounted on the closure member for extension and retraction relative thereto; d. a receptacle mounted on the hatchway door in alignment with the pin, said receptacle being mutually engageable and disengageable with said pin upon the extension and retraction thereof, respectively, said receptacle comprising an enlarged open central section adapted to receive loosely the pin upon the extension thereof and a bifurcated channel section communicating with said central section at one end thereof to resiliently grip the pin upon movement of the closure member towards the open condition, said channel section being adapted to release the pin responsive to the imparting of a predetermined excessive resistance thereto by the hatchway door; and e. cam means disposed to automatically effect movement of said pin into and out of engagement with the receptacle responsive, respectively, to movement of the closure member out of and into closed condition.
Claim 2
Dependent Claim
244 words
In combination with an elevator car movable within a shaft to and from generally oppositely disposed relationship to a hatchway, said hatchway having a door mounted thereon for slidable movement relative thereto in a predetermined path between open and closed conditions, the improvement comprising: a. a closure member carried by the car, said member being movable between open and closed conditions in a path generally parallel to the path of the hatchway door; b. operating means carried by the car to effect the selective movement of the member between the open and closed conditions; c. at least one pin mounted on the closure member for extension and retraction relative thereto; d. a receptacle mounted on the hatchway door in alignment with the pin, said receptacle being mutually engageable and disengageable with said pin upon the extension and retraction thereof, respectively, said receptacle comprising an enlarged open central section adapted to receive loosely the pin upon the extension thereof and a bifurcated channel section communicating with said central section at one end thereof to resiliently grip the pin upon movement of the closure member towards the open condition, said channel section being adapted to release the pin responsive to the imparting of a predetermined excessive resistance thereto by the hatchway door; and e. cam means disposed to automatically effect movement of said pin into and out of engagement with the receptacle responsive, respectively, to movement of the closure member out of and into closed condition.
Claim 3
Dependent Claim
71 words
In a combination according to claim 1, the improvement wherein the cam means comprises: a. a cam follower mounted on the pin; and b. a cam surface mounted on the car for engagement with the follower, said surface being proportioned to extend the pin upon movement of the closure member towards the open condition and to permit retraction of the pin upon movement of the closure member to the closed condition.
Claim 4
Dependent Claim
60 words
In a combination according to claim 1, the improvement wherein the receptacle further comprises a bifurcated end section communicating with the central section at an end thereof opposite the bifurcated channel section, said end section being adapted to offer resistance to the passage of the extended pin therethrough and to release the pin upon the occurrence of a predetermined resistance.
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) | 1974-12-27 | 1975-06-28 | 1975-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-27 | 1979-06-28 | 1979-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-27 | 1983-06-28 | 1983-12-28 | $7700.00 | Window Closed / Lapsed |