US4155578A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety latch for inward swinging doors
Assignee: Individual
•
Filing: 1977-09-28
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Granted: 1979-05-22
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Expires: 1997-09-28
Abstract
Abstract A safety latch for inward swinging doors, including a strap having a hook at one end extending laterally from one side for engaging the keeper on the door frame and an abutment extending laterally from the other side, and a wedge member having a pair of relatively diverging edges adapted to be positioned with one diverging edge engaging the abutment on the strap and the other diverging edge engaging the inside of the door to wedge lock the door in a closed position. A flexible member is provided for connecting the strap to the handle on the door to laterally stabilize the strap.
Inventors
- 👤 Burton A. Rolland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:56
CPC Classifications
E; E05; E05C; E05C19/00; E05C19/18; E05C19/182; Y; Y10; Y10T; Y10T292/00; Y10T292/37; Y10T292/379
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
310 words
A safety latch for use in a door and frame assembly of the type wherein the door is mounted on the frame for swinging inwardly to an open position and the door has a latch bolt at the free edge thereof engageable with a keeper on the door frame and a handle at the inside of the door for operating the latch bolt, the safety latch including a strap having a hook at one end extending laterally from one side of the strap and an abutment extending laterally from the other side of the strap at a location intermediate its ends and spaced from the hook, the strap being adapted to be positioned with the hook engaging the keeper on the door frame and with the strap extending laterally of the frame at the inner side thereof and the strap being thin to allow closing of the door while in that position whereby the door when closed holds the hook in engagement with the keeper, a wedge member having a pair of relatively diverging edges adapted to be positioned with one diverging edge engaging the abutment on the strap and the other diverging edge engaging the inner side of the door to wedge lock the door in a closed position, the forces applied by the wedge member to one abutment on the strap having a major component in a direction along the length of the strap and a second component which tends to urge the other end of the strap in a second direction laterally of said one side thereof, and connection means attached to said strap adjacent said other end and adapted for engagement with the handle at the inside of the door for connecting said other end of the strap to the handle to laterally stabilize said other end of the strap against movement in said second direction.
Claim 2
Dependent Claim
310 words
A safety latch for use in a door and frame assembly of the type wherein the door is mounted on the frame for swinging inwardly to an open position and the door has a latch bolt at the free edge thereof engageable with a keeper on the door frame and a handle at the inside of the door for operating the latch bolt, the safety latch including a strap having a hook at one end extending laterally from one side of the strap and an abutment extending laterally from the other side of the strap at a location intermediate its ends and spaced from the hook, the strap being adapted to be positioned with the hook engaging the keeper on the door frame and with the strap extending laterally of the frame at the inner side thereof and the strap being thin to allow closing of the door while in that position whereby the door when closed holds the hook in engagement with the keeper, a wedge member having a pair of relatively diverging edges adapted to be positioned with one diverging edge engaging the abutment on the strap and the other diverging edge engaging the inner side of the door to wedge lock the door in a closed position, the forces applied by the wedge member to one abutment on the strap having a major component in a direction along the length of the strap and a second component which tends to urge the other end of the strap in a second direction laterally of said one side thereof, and connection means attached to said strap adjacent said other end and adapted for engagement with the handle at the inside of the door for connecting said other end of the strap to the handle to laterally stabilize said other end of the strap against movement in said second direction.
Claim 3
Dependent Claim
45 words
A safety latch according to claim 1 wherein said connection means includes an elongated flexible member adapted to be looped around the handle on the door, and means for adjusting the length of the connection means that is effective between the strap and the handle.
Claim 4
Dependent Claim
71 words
A safety latch according to claim 1 wherein said connection means includes a flexible member, said strap having a V-shaped opening therein dimensioned to allow free lengthwise movement of the flexible member through its major end and to grip said flexible member when the latter is shifted in the V-shaped opening to a location spaced from its major end, said flexible member having an end portion extending through said V-shaped opening.
Claim 5
Dependent Claim
77 words
A safety latch according to claim 1 wherein said connection means includes an elongated flexible member having one end secured to the strap and adapted to be looped intermediate its ends around the handle on the inside of the door to laterally stabilize the strap, and means on said strap adjacent its other end engageable with a portion of said flexible member spaced from said one end thereof for adjustably securing said flexible member to said strap.
Claim 6
Dependent Claim
126 words
A safety latch according to claim 1 wherein said connection means includes an elongated flexible member adapted to be looped around the handle on the door, said strap has spaced overlapping portions at its other end, one of said overlapping portions having a first opening dimensioned to allow free lengthwise movement of said flexible member therethrough and the other of said overlapping portions having a second V-shaped opening therein dimensioned to allow free lengthwise movement of said one end portion of the flexible member through its major end and to grip the flexible member when the latter is shifted in the V-shaped opening to a location spaced from its major end, said one end portion of said flexible member extending through said first and second openings.
Claim 7
Dependent Claim
23 words
A safety latch according to claim 5 wherein the minor end of the V-shaped opening is disposed adjacent said opening in the strap.
Claim 8
Dependent Claim
34 words
A safety latch according to claim 5 wherein the terminus of said one end portion of said flexible member is attached to said wedge member to loosely interconnect said wedge member and the strap.
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) | 1982-05-21 | 1982-11-20 | 1983-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-05-21 | 1986-11-20 | 1987-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-05-21 | 1990-11-20 | 1991-05-22 | $7700.00 | Window Closed / Lapsed |