Patent US4009658A successfully refreshed from Google Patents.
Patent US4343500A successfully refreshed from Google Patents.
US4343500A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Floor imbedded door bolt
Assignee: Thunderbolt Corp
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Filing: 1980-05-21
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Granted: 1982-08-10
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Expires: 2000-05-21
Abstract
Abstract A security door stop bolt mounted in the floor preventing entrance through the door including a tube housing imbedded in the floor with a door stop sliding in the tube, nestled in the tube when not in use but raised with a manual lifting means to prevent inadvertent triggering of the stop bolt with a carpet cut out attached to the top of the door stop to hide the entire mechanism.
Inventors
- 👤 John W. Steiner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:02
CPC Classifications
E; E05; E05C; E05C17/00; E05C17/02; E05C17/46; E05C17/48; Y; Y10; Y10S; Y10S292/00; Y10S292/15; Y10T; Y10T292/00; Y10T292/08; Y10T292/096; Y10T292/0969; Y10T292/097; Y10T292/0997; Y10T292/1014; Y10T292/1021; Y10T292/1022; Y10T292/1028
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
163 words
A security door stop bolt for mounting in a carpet covered floor area located inside a door swinging to the inside of the structure to be protected, the bolt being out of the reach of anyone attempting entrance through the door comprising: (a) a housing comprising a first attachment means to secure the housing to a floor and a tube depending therefrom imbedded in the floor, (b) a door stop with a top slidably fitting in the tube below the upper surface of the floor, (c) a lifting means to manually grasp the door stop and lift it to a height above the floor surface to prevent the door from being pushed open into the inside area, (d) a retractable stop post means to hold the door stop at the upraised height, and (e) a second attachment means to secure on top of the door stop, a cut out of carpet of the same shape as the top of the door stop housing.
Claim 2
Dependent Claim
163 words
A security door stop bolt for mounting in a carpet covered floor area located inside a door swinging to the inside of the structure to be protected, the bolt being out of the reach of anyone attempting entrance through the door comprising: (a) a housing comprising a first attachment means to secure the housing to a floor and a tube depending therefrom imbedded in the floor, (b) a door stop with a top slidably fitting in the tube below the upper surface of the floor, (c) a lifting means to manually grasp the door stop and lift it to a height above the floor surface to prevent the door from being pushed open into the inside area, (d) a retractable stop post means to hold the door stop at the upraised height, and (e) a second attachment means to secure on top of the door stop, a cut out of carpet of the same shape as the top of the door stop housing.
Claim 3
Dependent Claim
52 words
The security door stop bolt of claim 1 wherein the bolt is constructed to mount on a carpet and pad covered floor and the housing comprises a flange securely attached to the top of the floor with the flange being of a thickness approximately equivalent to a carpet pad on the floor.
Claim 4
Dependent Claim
24 words
The security door stop of claim 1 wherein the tube is cylindrical and the stop is cylindrical, sliding inside the tube of the housing.
Claim 5
Dependent Claim
36 words
The security door stop of claim 1 wherein a ferrous metal attachment means is used to fix the cut out of carpet to the top of the door stop and the lifting means comprises a magnet.
Claim 6
Dependent Claim
78 words
The security door stop of claim 1 wherein the housing includes a bottom wall on which a spring means rests providing a bias pressure on the door stop when it is lowered to the storage position wherein the bias pressure is sufficient to reduce the force of dropping the door stop against the bottom of the housing, but insufficient bias pressure to cause the door stop to rest above the level of the upper surface of the floor.
Claim 7
Dependent Claim
77 words
The security door stop bolt of claim 1 wherein a vertical slot is provided along one side of the housing having an upper termination end, and a guide means is provided extending horizontally from the door stop slidably riding in the slot as the door stop is raised and lowered, wherein the height of the termination end is chosen to allow the retractable stop post to extend out above the housing when the door stop is raised.
Claim 8
Dependent Claim
35 words
The security door stop bolt of claim 1 wherein the lifting means is the combination of the attachment means being of ferrous metal and a magnet manually allowed to magnetically adhear to the attachment means.
Claim 9
Dependent Claim
26 words
The security door stop bolt of claim 1 wherein the cut out of carpet matches a carpet covered floor area into which the housing is imbedded.
References Cited (Backward Citations)
US2497697A
Cited
US2809062A
Cited
US3330585A
Cited
US3563586A
Cited
US4227726A
Cited
US4183565A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-08-09 | 1986-02-08 | 1986-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-08-09 | 1990-02-08 | 1990-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-08-09 | 1994-02-08 | 1994-08-10 | $7700.00 | Window Closed / Lapsed |