US3922925A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Devices for controlling opening and closing of pressure doors and pressure door equipments incorporating said control devices
Assignee: IHI Corp
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Filing: 1973-12-21
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Granted: 1975-12-02
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Expires: 1993-12-21
Abstract
Abstract A plurality of operating rods which are operatively coupled to various mechanisms for controlling the opening or closing of a pressure door or the like are sequentially operated by a cam disk which in turn is rotated through suitable reduction gear means by a handlewheel so that the steps for opening a pressure door or the like may be carried out sequentially. A pressure door equipment having a plurality of pressure doors and incorporating the control device of the type described is also disclosed.
Inventors
- 👤 Kiyomi Takei
- 👤 Katsumi Takahashi
- 👤 Kazuo Kanazawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:15
CPC Classifications
E; E05; E05F; E05F11/00; E05F11/02; E05F11/08; E05F11/10; E05Y; E05Y2900/00; E05Y2900/10; E05Y2900/13; E05Y2900/132; Y; Y10; Y10T; Y10T292/00; Y10T292/08; Y10T292/0801; Y10T292/0834; Y10T292/0836; Y10T292/0837; Y10T74/00; Y10T74/18; Y10T74/18056; Y10T74/1828; Y10T74/18568; Y10T74/188; Y10T74/18808; Y10T74/18816
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
160 words
A device for controlling a plurality of operation steps in a predetermined sequential order comprising; a. a handlewheel, b. a cam disk operatively coupled to said handlewheel through reduction gear means and provided with a cam surface having one cam follower displacing protion, c. a plurality of cam followers located around said cam disk and spaced apart from each other by a predetermined distance in such a way that said plurality of cam followers may be displaced sequentially in a predetermined order as said cam disk is rotated by said handlewheel in one direction through a predetermined angle, and d. lever means operatively coupling each of said plurality of cam followers to an operating rod, whereby when said plurality of cam followers engage with said cam follower displacing portion of said cam disk as said cam disk rotates in said one direction, said operating rods coupled to said plurality of cam followers may be sequentially displaced in a predetermined direction.
Claim 2
Independent Claim
160 words
A device for controlling a plurality of operation steps in a predetermined sequential order comprising; a. a handlewheel, b. a cam disk operatively coupled to said handlewheel through reduction gear means and provided with a cam surface having one cam follower displacing protion, c. a plurality of cam followers located around said cam disk and spaced apart from each other by a predetermined distance in such a way that said plurality of cam followers may be displaced sequentially in a predetermined order as said cam disk is rotated by said handlewheel in one direction through a predetermined angle, and d. lever means operatively coupling each of said plurality of cam followers to an operating rod, whereby when said plurality of cam followers engage with said cam follower displacing portion of said cam disk as said cam disk rotates in said one direction, said operating rods coupled to said plurality of cam followers may be sequentially displaced in a predetermined direction.
Claim 3
Independent Claim
155 words
A device for controlling the opening or closing of a pressure door or the like wherein a cam disk is rotatable in response to the rotation of a handlewheel through a reduction gear means; an annular cam groove is formed in one side face of said cam disk coaxially thereof; pins are disposed so as to be slidable in said annular cam groove; a plurality of linkages in each of which an operating rod is pivoted to a rotary shaft about which each of said pins rotates are disposed around said cam disk in spaced relation with each other in such a way that said linkages may be actuated by the rotation of said rotary shafts which in turn are rotated by the rotation in one direction of said cam disk through said pins; and said linkages may be held stationary until said cam disk and hence said pins are rotated in the opposite direction.
Claim 4
Independent Claim
155 words
A device for controlling the opening or closing of a pressure door or the like wherein a cam disk is rotatable in response to the rotation of a handlewheel through a reduction gear means; an annular cam groove is formed in one side face of said cam disk coaxially thereof; pins are disposed so as to be slidable in said annular cam groove; a plurality of linkages in each of which an operating rod is pivoted to a rotary shaft about which each of said pins rotates are disposed around said cam disk in spaced relation with each other in such a way that said linkages may be actuated by the rotation of said rotary shafts which in turn are rotated by the rotation in one direction of said cam disk through said pins; and said linkages may be held stationary until said cam disk and hence said pins are rotated in the opposite direction.
Claim 5
Dependent Claim
93 words
A device as defined in claim 2 wherein a portion of said annular cam groove is curved radially inwardly; a plurality of linkages in each of which each of said pins is fixed to one end of each linkage and said operating rod is pivoted to the other end thereof are disposed around said cam disk and spaced apart from each other by a predetermined distance, whereby each of said linkages may be actuated as said pin of each linkage passes through said radially inwardly curved portion as said cam disk is rotated.
Claim 6
Dependent Claim
138 words
A device as defined in claim 2 wherein a toothed portion with a plurality of teeth is formed at a suitable portion of the periphery of said cam disk; a plurality of cam followers are disposed around said cam disk and spaced apart from each other by a predetermined distance, each of said cam followers comprises a pair oF spaced apart pins one of which is selectively slidably fitted into said annular cam groove and which are operatively coupled through a lever linkage to each of said operating rods, and a plurality of toothed portions formed on the peripheral surface of each of said cam followers whereby said toothed portions of said plurality of cam followers are sequentially engaged with said toothed portion of said cam disk as said cam disk is rotated, thereby rotating said cam followers.
References Cited (Backward Citations)
US645448A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-01 | 1979-06-02 | 1979-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-01 | 1983-06-02 | 1983-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-01 | 1987-06-02 | 1987-12-02 | $7700.00 | Window Closed / Lapsed |