US4135748A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable door lock
Assignee: Individual
•
Filing: 1977-06-21
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Granted: 1979-01-23
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Expires: 1997-06-21
Abstract
Abstract This invention is an improved security door lock, particularly to night security latching arrangements, and specifically to a portable door lock that can be carried during travel for use in securing hotel and motel doors against entry. The portable door lock of this invention can also be used in the home or permanent residence for security against the entry of unauthorized persons. The convenient small size and configuration of this device makes it possible to carry it in the pocket, on a key-chain, or in a suitcase compartment while travelling.
Inventors
- 👤 Charles K. Roberts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:50
CPC Classifications
E; E05; E05C; E05C19/00; E05C19/18; E05C19/182; Y; Y10; Y10T; Y10T292/00; Y10T292/37; Y10T292/394; Y10T292/397
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
52 words
A method for latching a closed door having an inside knob on said closed door and a keeper recess in the jamb, comprising, inserting a connecting unit in said keeper recess in said jamb while the door is closed, and attaching said connecting unit to said inside knob of said closed door.
Claim 2
Independent Claim
52 words
A method for latching a closed door having an inside knob on said closed door and a keeper recess in the jamb, comprising, inserting a connecting unit in said keeper recess in said jamb while the door is closed, and attaching said connecting unit to said inside knob of said closed door.
Claim 3
Dependent Claim
118 words
A closed door portable lock system for attachment to a door system that is closed, said door system consisting of a framework having a keeper pocket therein and having a closed door mounted within said framework, said closed door having a door knob as part thereof, said door lock system consisting of: a latching means coupling said keeper pocket to said door knob, with the connection of said keeper pocket to said door knob being made by placing said latching means between said closed door and said framework to reach said keeper pocket while said door is in closed postion; and securing means attached to said latching means to further secure said latching means to said door knob.
Claim 4
Dependent Claim
118 words
A closed door portable lock system for attachment to a door system that is closed, said door system consisting of a framework having a keeper pocket therein and having a closed door mounted within said framework, said closed door having a door knob as part thereof, said door lock system consisting of: a latching means coupling said keeper pocket to said door knob, with the connection of said keeper pocket to said door knob being made by placing said latching means between said closed door and said framework to reach said keeper pocket while said door is in closed postion; and securing means attached to said latching means to further secure said latching means to said door knob.
Claim 5
Dependent Claim
20 words
The door lock system as recited in claim 2, wherein said latching means is formed from a single rod-like member.
Claim 6
Dependent Claim
44 words
The door lock system as recited in claim 2, wherein said securing means consists of a chain-like member attached to said latching means and a catch member attached to said chain-like member at the end opposite to that end attached to said latching means.
Claim 7
Dependent Claim
177 words
The door lock system as recited in claim 3, wherein said single rod-like member is formed into a configuration consisting of: an eye to which said securing means is attached; a first 90° radial bend adjacent to and a continuation of said eye structure and in same plane with said eye, and wherein said 90° radial bend approximates radius of the neck of a door knob; a straight shank extending from and as a continuation of said radial bend; a second 90° radial bend extending from and as a continuation of said straight shank, said radial bend being in a plane perpendicualr to said plane of said eye and said first 90° radial bend; a short straight section extending from and as a continuation of said second 90° radial bend; and a hook-like bend extending from and as a continuation of said short straight section, said hook-like bend extending from and as a continuation of said short straight section, said hook-like bend and said short straight section being in same plane with said second 90° radial bend.
Claim 8
Dependent Claim
36 words
The door lock system as recited in claim 5 and additionally, an extension on said hook-like bend at juncture of said hook-like bend with said short straight section to convert it to a "T" shaped 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) | 1982-01-22 | 1982-07-24 | 1983-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-22 | 1986-07-24 | 1987-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-22 | 1990-07-24 | 1991-01-23 | $7700.00 | Window Closed / Lapsed |