Patent US3782141A successfully refreshed from Google Patents.
US3782141A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flush type door latch
Assignee: AL Hansen Manufacturing Co
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Filing: 1972-10-26
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Granted: 1974-01-01
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Expires: 1992-10-26
Abstract
Abstract A door latch embodying the principles of this invention is designed to be assembled in a conventional pan-shaped housing having a shallow depth and having a slot provided in the back wall. A guide member is supported on the outside surface of the back wall and open to the slot to slidably receive a lock bolt therein. A compression spring biases the bolt outwardly into the projected latching position. A latching member having a plate portion of a shape conforming to the outer dimensions of the open front face of the door latch housing is pivotally mounted between the opposite side walls of the housing and has a lever portion which projects through the back wall slot and into a recess formed in the lock bolt for retracting the lock bolt against the force of the compression spring. An eject member is also pivotally supported between the side wall housings and includes a push button member which projects through an opening provided in the latching member plate portion. The eject member also includes a nose portion which engages the under surface of the plate portion latching member adjacent its outer free end such that upon an inward force applied to the push button member causes the nose portion to swing outwardly and force the free end of the latching member away from the housing a sufficient distance to be gripped by the user.
Inventors
- 👤 R Doerrfeld
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:35
CPC Classifications
E; E05; E05C; E05C1/00; E05C1/08; E05C1/12; E05C1/14; E05C1/145; Y; Y10; Y10S; Y10S292/00; Y10S292/31; Y10T; Y10T292/00; Y10T292/08; Y10T292/096; Y10T292/0969; Y10T292/097; Y10T292/0994; Y10T70/00; Y10T70/50; Y10T70/5093; Y10T70/5155; Y10T70/5199; Y10T70/5372; Y10T70/5385; Y10T70/5389; Y10T70/5394; Y10T70/5465; Y10T70/5482; Y10T70/5611; Y10T70/5757; Y10T70/5761
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
190 words
In a door latch having a housing with back and side walls presenting an open front face, said back wall having a slot therein, a guide member supported on the outside surface of said back wall and open to said slot, a bolt slidable in said guide member, spring means biasing said bolt into a projected latching position, an improvement comprising a latching member having a plate portion of a shape conforming to the outer dimensions of said open front face to fit therein and having a lever portion with one end projecting through said slot for retracting said bolt against the force of said spring means, first pivot means for rotatably supporting said latching member adjacent one end of said plate portion, and eject means for moving the opposite end of said plate portion to said one end outwardly of said open front face a sufficient distance to permit gripping therewith, said eject means including a button member disposed through an opening in said plate portion and operatively connected to said latching member to effect said outward movement of said plate portion in response to an inward pushing force.
Claim 2
Dependent Claim
190 words
In a door latch having a housing with back and side walls presenting an open front face, said back wall having a slot therein, a guide member supported on the outside surface of said back wall and open to said slot, a bolt slidable in said guide member, spring means biasing said bolt into a projected latching position, an improvement comprising a latching member having a plate portion of a shape conforming to the outer dimensions of said open front face to fit therein and having a lever portion with one end projecting through said slot for retracting said bolt against the force of said spring means, first pivot means for rotatably supporting said latching member adjacent one end of said plate portion, and eject means for moving the opposite end of said plate portion to said one end outwardly of said open front face a sufficient distance to permit gripping therewith, said eject means including a button member disposed through an opening in said plate portion and operatively connected to said latching member to effect said outward movement of said plate portion in response to an inward pushing force.
Claim 3
Dependent Claim
80 words
The combination of claim 1, wherein said eject means comprises an eject member having a web portion and two side flanges and second pivot means, said second pivot means rotatably supporting said side flanges to turn about an axis parallel to the axis of said first pivot means, said side flanges having a forward nose portion in engagement with said opposite end of said plate portion, and wherein said button member comprises a central raised section on said web portion.
Claim 4
Dependent Claim
18 words
The combination of claim 1, further comprising lock means for selectively preventing outward movement of said latching member.
Claim 5
Dependent Claim
69 words
The combination of claim 3, wherein said lock means comprises a key-actuated device having a lock cylinder mounted through an aperture in said plate portion adjacent said eject means and having a locking arm rotatable between two angular orientations wherein one of said angular orientations said locking arm interlocks said latching member and said eject means to prevent any movement of either said latching member or said button member.
Claim 6
Dependent Claim
225 words
In a door latch having a generally rectangular housing with back and side walls presenting an open rectangular front face, said back wall having a slot therein, a guide member supported on the outside surface of said back wall and open to said slot, a bolt slidable in said guide member, spring means biasing said bolt into a projected latching position, an improvement comprising a latching member having a generally rectangular plate portion slightly smaller than the outer dimensions of said open front face with side flanges extending from its lateral edges and having a lever portion with one end projecting through said slot for retracting said bolt against the force of said spring means, first pivot pin extending between said housing side walls and through aligned openings in said side flanges adjacent one end of said plate portion, an eject member having a web portion and two side flanges, and second pivot pin extending between said housing side walls parallel to said first pivot pin and through aligned apertures in said eject member side flanges, said web portion having a raised central section extending into an opening in said plate portion, and said eject member side flanges having a nose portion forward of said second pivot pin in engagement with the under surface of the outer free end of said latching member plate portion.
Claim 7
Dependent Claim
225 words
In a door latch having a generally rectangular housing with back and side walls presenting an open rectangular front face, said back wall having a slot therein, a guide member supported on the outside surface of said back wall and open to said slot, a bolt slidable in said guide member, spring means biasing said bolt into a projected latching position, an improvement comprising a latching member having a generally rectangular plate portion slightly smaller than the outer dimensions of said open front face with side flanges extending from its lateral edges and having a lever portion with one end projecting through said slot for retracting said bolt against the force of said spring means, first pivot pin extending between said housing side walls and through aligned openings in said side flanges adjacent one end of said plate portion, an eject member having a web portion and two side flanges, and second pivot pin extending between said housing side walls parallel to said first pivot pin and through aligned apertures in said eject member side flanges, said web portion having a raised central section extending into an opening in said plate portion, and said eject member side flanges having a nose portion forward of said second pivot pin in engagement with the under surface of the outer free end of said latching member plate portion.
Claim 8
Dependent Claim
18 words
The combination of claim 5, further comprising lock means for selectively preventing outward movement of said latching members.
Claim 9
Dependent Claim
69 words
The combination of claim 6, wherein said lock means comprises a key-actuated device having a lock cylinder mounted through an aperture in said plate portion adjacent said eject means and having a locking arm rotatable between two angular orientations wherein one of said angular orientations said locking arm interlocks said latching member anD said eject member to prevent any movement of either said latching member or said eject 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) | 1976-12-31 | 1977-07-02 | 1978-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-31 | 1981-07-02 | 1982-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-31 | 1985-07-02 | 1986-01-01 | $7700.00 | Window Closed / Lapsed |