US4248461A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sliding door locking apparatus
Assignee: Individual
•
Filing: 1979-03-22
•
Granted: 1981-02-03
•
Expires: 1999-03-22
Abstract
Abstract A sliding door locking apparatus in which ratchet shaped catches project vertically from a housing and are depressible to a lowered position. The housing is horizontally mounted to the base of the door frame. One of the catches prevents the opening of the door by making contact with a blocking member that is attached to the slidable door panel. However, the door can be quickly closed because contact between the blocking member and the catch in the opposite direction depresses the catch, owing to its ratchet shape. When the catch is depressed to a lower position, the door can move freely in either direction. An alarm is provided which is responsive to an attempt to open the door when the catch is not depressed to a lowered position.
Inventors
- 👤 C. Jim Stevens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:40
CPC Classifications
E; E05; E05B; E05B65/00; E05B65/08; E05B65/0811; E05B65/0829; E05B45/00; E05B45/06; E05B45/08; E05B45/12; E05C; E05C17/00; E05C17/60; E05C17/62; Y; Y10; Y10S; Y10S292/00; Y10S292/46; Y10T; Y10T292/00; Y10T292/08; Y10T292/1043; Y10T292/1044; Y10T292/1045; Y10T292/1049; Y10T292/28; Y10T292/285
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
215 words
A lock, in combination with a sliding door, said door having a door frame and a slidable door panel movable between a closed position and a fully opened position, said lock comprising: (a) a housing member mounted to the base of the door frame; (b) catch means pivotally attached to said housing, said catch means being disposed in a normally raised position and including a plurality of catches which project vertically upward; (c) depression means for depressing said catch means to a lowered position; (d) a blocking member mounted to the slidable door panel and arranged such that said blocking member makes contact with one of said plurality of catches when said catch means is in the normally raised position and said door panel is in said closed position thereby preventing movement of the slidable door panel from a closed position to a fully opened position; (e) a horizontally flat pedal portion secured to one end of said catch bar; (f) a spring connecting said catch bar to said housing, said spring urging said catch bar toward said normally raised position; and (g) alarm means responsive to an axial force applied to said catch bar, such that if a sufficient axial force is applied to said catch bar, said alarm means produces an alarm signal.
Claim 2
Dependent Claim
215 words
A lock, in combination with a sliding door, said door having a door frame and a slidable door panel movable between a closed position and a fully opened position, said lock comprising: (a) a housing member mounted to the base of the door frame; (b) catch means pivotally attached to said housing, said catch means being disposed in a normally raised position and including a plurality of catches which project vertically upward; (c) depression means for depressing said catch means to a lowered position; (d) a blocking member mounted to the slidable door panel and arranged such that said blocking member makes contact with one of said plurality of catches when said catch means is in the normally raised position and said door panel is in said closed position thereby preventing movement of the slidable door panel from a closed position to a fully opened position; (e) a horizontally flat pedal portion secured to one end of said catch bar; (f) a spring connecting said catch bar to said housing, said spring urging said catch bar toward said normally raised position; and (g) alarm means responsive to an axial force applied to said catch bar, such that if a sufficient axial force is applied to said catch bar, said alarm means produces an alarm signal.
Claim 3
Dependent Claim
74 words
The lock of claim 1 in which said catch means includes a catch bar having a plurality of catches said plurality of catches having a sawtooth shape such that when the slidable door panel is opened and said catch bar is in said normally raised position, contact between said blocking member and said catch bar as said sliding door panel is moved to said closed position depresses said catch bar to said lowered position.
Claim 4
Dependent Claim
18 words
The lock of claim 1 wherein said plurality of said catches includes four catches on three inch spacing.
Claim 5
Dependent Claim
213 words
A lock, in combination with a sliding door, said door having a door frame and a slidable door panel movable between a closed position and a fully opened position, said lock comprising: (a) a housing member mounted to the base of the door frame; (b) catch means pivotally attached to said housing, said catch means being disposed in a normally raised position and including a plurality of catches which project vertically upward; (c) depression means for depressing said catch means to a lowered position; said depression means including (i) pedal means attached to one end of said catch bar, for depressing said catch bar; (ii) spring means for biasing said catch bar in a normally raised position and for resiliently returning said catch to its normally raised position when any depressing force is removed from said pedal means; and (iii) latch means for maintaining said catch bar in said lowered position; (d) a blocking member mounted to the slidable door panel and arranged such that said blocking member makes contact with one of said plurality of catches when said catch means is in the normally raised position and said door panel is in said closed position thereby preventing movement of the slidable door panel from a closed position to a fully opened position.
Claim 6
Dependent Claim
213 words
A lock, in combination with a sliding door, said door having a door frame and a slidable door panel movable between a closed position and a fully opened position, said lock comprising: (a) a housing member mounted to the base of the door frame; (b) catch means pivotally attached to said housing, said catch means being disposed in a normally raised position and including a plurality of catches which project vertically upward; (c) depression means for depressing said catch means to a lowered position; said depression means including (i) pedal means attached to one end of said catch bar, for depressing said catch bar; (ii) spring means for biasing said catch bar in a normally raised position and for resiliently returning said catch to its normally raised position when any depressing force is removed from said pedal means; and (iii) latch means for maintaining said catch bar in said lowered position; (d) a blocking member mounted to the slidable door panel and arranged such that said blocking member makes contact with one of said plurality of catches when said catch means is in the normally raised position and said door panel is in said closed position thereby preventing movement of the slidable door panel from a closed position to a fully opened position.
Claim 7
Dependent Claim
140 words
A lock, in combination with a sliding door, said door having a door frame and a slidable door panel movable between a closed position and a fully opened position, said lock comprising: (a) a housing member secured to the base of said door frame in a substantially horizontal orientation; (b) a blocking member secured to said slidable door panel and extending outwardly therefrom in a direction toward said housing member; (c) a catch bar pivotally attached to said housing member and movable between a normally raised position and a depressed position, said catch bar including at least one catch which engages said blocking member when said sliding door is in said closed position; and (d) alarm means disposed between one end of said catch bar and said housing member operatively arranged for signaling attempted forced opening of said sliding door.
Claim 8
Dependent Claim
140 words
A lock, in combination with a sliding door, said door having a door frame and a slidable door panel movable between a closed position and a fully opened position, said lock comprising: (a) a housing member secured to the base of said door frame in a substantially horizontal orientation; (b) a blocking member secured to said slidable door panel and extending outwardly therefrom in a direction toward said housing member; (c) a catch bar pivotally attached to said housing member and movable between a normally raised position and a depressed position, said catch bar including at least one catch which engages said blocking member when said sliding door is in said closed position; and (d) alarm means disposed between one end of said catch bar and said housing member operatively arranged for signaling attempted forced opening of said sliding door.
Claim 9
Dependent Claim
17 words
The lock of claim 5 wherein said catch bar includes four catches located on 3 inch centers.
References Cited (Backward Citations)
US157452A
Cited
US533660A
Cited
US570007A
Cited
US964283A
Cited
CA557509A
Cited
US1460614A
Cited
US1594295A
Cited
US2448748A
Cited
GB868209A
Cited
US3083045A
Cited
US3352586A
Cited
US4068872A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-02-03 | 1984-08-04 | 1985-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-02-03 | 1988-08-04 | 1989-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-02-03 | 1992-08-04 | 1993-02-03 | $7700.00 | Window Closed / Lapsed |