← Back to Patent Explorer
US3752518A Expired / Lapsed US ⏱️ 0.0 years remaining

Door bolt

Assignee: Individual
•
Filing: 1971-09-22
•
Granted: 1973-08-14
•
Expires: 1991-09-22
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract A door bolt for attachment to the inner side of a door to be secured thereby includes a tubular body member having a pair of bars positioned therein for axial movement thereof. Mounting brackets secure the tubular body member to the door and the bars are moveable out of the ends of the tubular member into openings formed in the door casing. Openings formed in the center section of the tubular body member receive the hasp of a padlock between the inner opposed ends of the bars to hold the same in spaced relation with the outer ends engaging the openings in the door casing. A padlock body is applied to the hasp. Openings in the bars inwardly of the ends thereof enable the padlock hasp to be positioned there through when the bars are in innermost engaging position and be held in such position by said hasp and padlock body.

Inventors

  • 👤 F Cannell

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-24 09:09
CPC Classifications
E; E05; E05C; E05C19/00; E05C19/003; Y; Y10; Y10T; Y10T292/00; Y10T292/08; Y10T292/0801; Y10T292/0834; Y10T292/0836; Y10T292/0846; Y10T292/096; Y10T292/1014; Y10T292/1022; Y10T292/1025; Y10T292/23

Claims Analysis

Total Claims: 4
Claim 1
Independent Claim 137 words
A door bolt for application to a door in a doorway defined by a casing and comprising a tubular body membEr of substantially the same length as the width of the door, means for mounting the tubular body member on the door with the ends adjacent to the casing, a pair of bars slideably disposed in the tubular body member and arranged for movement into and out of openings in the door casing, a padlock including a hasp and a removable lock body; said hasp of said padlock registering with vertical openings in said tubular body member centrally thereof and between the inner ends of said bars when the same are engaged in said openings, said hasp being of a size and so positioned in said openings in said tubular body to prevent retraction of said bars.
Claim 2
Dependent Claim 137 words
A door bolt for application to a door in a doorway defined by a casing and comprising a tubular body membEr of substantially the same length as the width of the door, means for mounting the tubular body member on the door with the ends adjacent to the casing, a pair of bars slideably disposed in the tubular body member and arranged for movement into and out of openings in the door casing, a padlock including a hasp and a removable lock body; said hasp of said padlock registering with vertical openings in said tubular body member centrally thereof and between the inner ends of said bars when the same are engaged in said openings, said hasp being of a size and so positioned in said openings in said tubular body to prevent retraction of said bars.
Claim 3
Dependent Claim 52 words
The door bolt set forth in claim 1 and wherein openings are formed in the bars inwardly of their ends and spaced with respect thereto for registry with said openings in the said body member and said hasp when said bars are in end to end engagement within said tubular body member.
Claim 4
Dependent Claim 41 words
The door bolt set forth in claim 1 and wherein the hasp of the padlock has spaced parallel arms and an innerconnecting member formed substantially right angle thereto so as to be closely spaced with respect to said tubular body member.

References Cited (Backward Citations)

US1113479A Cited
US1500345A Cited
FR853639A Cited
FR966157A Cited
US2613970A Cited
US2872233A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1976-08-13 1977-02-12 1977-08-14 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1980-08-13 1981-02-12 1981-08-14 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1984-08-13 1985-02-12 1985-08-14 $7700.00 Window Closed / Lapsed

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag