Patent US1069364A successfully refreshed from Google Patents.
Patent US3844591A successfully refreshed from Google Patents.
US3844591A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Door latch means
Assignee: White Welding and Manufacturing Inc
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Filing: 1973-09-24
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Granted: 1974-10-29
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Expires: 1993-09-24
Abstract
Abstract A horizontal latch member is pivotally mounted on a vertical shaft rotatably mounted on one of two adjacent doors. The latch member has vertically open cam slot means extending lengthwise thereof intermediate of the ends thereof and has a hook-shaped nose portion at the other end thereof. A vertical pin member is carried by the one door and is engaged in the cam slot means, while a vertical post member is carried by the other door and is engageable by the nose portion. Rotation of the shaft and consequent movement of the latch member effect opening and closing of the latch means.
Inventors
- 👤 M Velcover
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:54
CPC Classifications
E; E05; E05B; E05B83/00; E05B83/02; E05B83/08; E05B83/10; Y; Y10; Y10S; Y10S292/00; Y10S292/32; Y10T; Y10T292/00; Y10T292/08; Y10T292/0801; Y10T292/0803; Y10T292/0805; Y10T292/0806; Y10T292/0911; Y10T292/0913; Y10T292/0914; Y10T292/0917; Y10T292/1043; Y10T292/1044; Y10T292/1045; Y10T292/1049
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
256 words
For use with first and second vertical hinged doors having inner edges adjacently located when the doors are in a closed position, and a vertical door fastening operating shaft rotatably mounted on the outer face of the first door, latch means comprising a horizontal elongated latch member presenting inner and outer ends and a front face, said latch member being pivotally mounted on a vertical axis at said inner end thereof to the operating shaft, said latch member having vertically open cam slot means extending lengthwise thereof intermediate of the ends thereof and having a hook-shaped nose portion at said outer end thereof, a vertical pin member carried by the first door and being engaged in said cam slot means, a vertical post member carried by the second door and engageable by said nose portion, said cam slot means being caused by movement of said latch member in response to rotation of the operating shaft in one direction to ride over said pin member whereby said nose portion is successively swung toward the second door and then engaged with said post member for closing said latch means with said post member positioned at a predetermined location relative to said pin member, and said cam slot means being caused by movement of said latch member in response to rotation of the operating shaft in the other direction to ride over said pin member whereby said nose portion is successively disengaged from said post member and then swung away from the second door for opening said latch means.
Claim 2
Dependent Claim
256 words
For use with first and second vertical hinged doors having inner edges adjacently located when the doors are in a closed position, and a vertical door fastening operating shaft rotatably mounted on the outer face of the first door, latch means comprising a horizontal elongated latch member presenting inner and outer ends and a front face, said latch member being pivotally mounted on a vertical axis at said inner end thereof to the operating shaft, said latch member having vertically open cam slot means extending lengthwise thereof intermediate of the ends thereof and having a hook-shaped nose portion at said outer end thereof, a vertical pin member carried by the first door and being engaged in said cam slot means, a vertical post member carried by the second door and engageable by said nose portion, said cam slot means being caused by movement of said latch member in response to rotation of the operating shaft in one direction to ride over said pin member whereby said nose portion is successively swung toward the second door and then engaged with said post member for closing said latch means with said post member positioned at a predetermined location relative to said pin member, and said cam slot means being caused by movement of said latch member in response to rotation of the operating shaft in the other direction to ride over said pin member whereby said nose portion is successively disengaged from said post member and then swung away from the second door for opening said latch means.
Claim 3
Dependent Claim
39 words
The latch means of claim 1 wherein said cam slot means includes a main section parallel to the length-wise axis of said latch member, and an end bend section directed angularly toward said front face of said latch member.
Claim 4
Dependent Claim
55 words
The latch means of claim 1 wherein said cam slot means includes a main section directed angularly toward said front face of said latch member, an intermediate bend section directed angularly away from said front face of said latch member, and an end bend section directed angularly toward said front face of said latch member.
Claim 5
Dependent Claim
33 words
The latch means of claim 1 wherein said latch member includes arcuate cam edge means adjacent said nose portion which rides across said post member during opening and closing of said latch means.
Claim 6
Dependent Claim
36 words
The latch means of claim 1 wherein said latch member comprises an outer vertical web and inwardly directed upper and lower flanges, and said cam slot means is comprised of cam slots formed in said flanges.
Claim 7
Dependent Claim
39 words
The latch means of claim 5 wherein said latch member includes arcuate cam edges which are formed in said flanges adjacent said nose portion and which ride across said post member during opening and closing of said latch means.
Claim 8
Dependent Claim
39 words
The latch means of claim 6 wherein said cam slots each include a main section parallel to the lengthwise axis of said latch member, and an end bend section directed angularly toward said front face of said latch member.
Claim 9
Dependent Claim
55 words
The latch means of claim 6 wherein said cam slots each include a main section directed angularly toward said front face of said latch member, an intermediate bend section directed angularly away from said front face of said latch member, and an end bend section directed angularly toward said front face of said latch member.
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) | 1977-10-28 | 1978-04-29 | 1978-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-28 | 1982-04-29 | 1982-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-28 | 1986-04-29 | 1986-10-29 | $7700.00 | Window Closed / Lapsed |