US3667259A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety lock
Assignee: ENG DEV CO Inc
•
Filing: 1970-08-05
•
Granted: 1972-06-06
•
Expires: 1990-08-05
Abstract
Abstract An improved safety lock which includes two pivotally connected members each having a shank portion with an aperture therein and a hook portion. The shank portions of the pivoted members are adapted to overlap with the apertures therein being placed in registry so as to receive the hasp of a padlock. With the shank portions of the members overlapping and the holes therein placed in registry, the free end parts of the hook portions overlap to define, in association with the remainder of the hook portions, a continuous lock ring which is adapted to extend through an anchoring aperture and around a lever or handle of a switch or valve in order to prevent the actuation of the switch or valve. The overlapping end parts of the lock''s hook portions include components which cause the end parts to interlock so as to prevent the hook portions from being separated and disengaged from the switch or valve without the release of the padlock which extends through the shank portions of the safety lock and which normally prevents separating movement of the hook portions.
Inventors
- 👤 Albert K Reque
- 👤 Julius T Peterson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:09
CPC Classifications
E; E05; E05B; E05B67/00; E05B67/38; E05B67/383; Y; Y10; Y10T; Y10T292/00; Y10T292/34; Y10T70/00; Y10T70/40; Y10T70/402; Y10T70/409; Y10T70/411; Y10T70/50; Y10T70/5611; Y10T70/569; Y10T70/573; Y10T70/5735; Y10T70/5739
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
189 words
A safety lock including a pair of pivotally connected members each having a shank portion and a hook portion, each shank portion having at least one aperture therein, the shank portions being positionable in an overlapping relationship in which the apertures in the shank portions are brought into registry, each hook portion including a concave part and an end part, the concave part of one hook portion confronting the concave part of the other hook portion with the end parts of the hook portions overlapping to define a lock ring when said shank portions are positioned in said overlapping relationship, the improvement wherein each hook portion end part includes a pair of confronting tabs extending from opposite edges of and bent over and spaced from the overlapped part of their hook portion defining an opening between said tabs and overlapped part, each pair of tabs being inwardly spaced from the tip of their hook portion, each hook portion end part being received in the opening formed by and between said tabs and overlapped part of the other hook portion when said shank portions are positioned in said overlapping relationship.
Claim 2
Dependent Claim
189 words
A safety lock including a pair of pivotally connected members each having a shank portion and a hook portion, each shank portion having at least one aperture therein, the shank portions being positionable in an overlapping relationship in which the apertures in the shank portions are brought into registry, each hook portion including a concave part and an end part, the concave part of one hook portion confronting the concave part of the other hook portion with the end parts of the hook portions overlapping to define a lock ring when said shank portions are positioned in said overlapping relationship, the improvement wherein each hook portion end part includes a pair of confronting tabs extending from opposite edges of and bent over and spaced from the overlapped part of their hook portion defining an opening between said tabs and overlapped part, each pair of tabs being inwardly spaced from the tip of their hook portion, each hook portion end part being received in the opening formed by and between said tabs and overlapped part of the other hook portion when said shank portions are positioned in said overlapping relationship.
Claim 3
Dependent Claim
177 words
A safety lock including a pair of pivotally connected members each having a shank portion and a hook portion, each shank portion having at least one aperture therein, the shank portions being positionable in an overlapping relationship in which the apertures in the shank portions are brought into registry, each hook portion including a concave part and an end part, the concave part of one hook portion confronting the concave part of the other hook portion with the end parts of the hook portions overlapping to define a lock ring when said shank portions are positioned in said overlapping relationship, the improvement wherein the end part of said one hook portion includes a pair of confronting tabs extending from opposite edges of and bent over and spaced from the overlapped part of said one hook portion defining an opening between said tabs and said overlapped part, the end part of said other hook portion being received within said opening and positioned between said tabs and overlapped part when said shank portions are positioned in said overlapping relationship.
Claim 4
Dependent Claim
177 words
A safety lock including a pair of pivotally connected members each having a shank portion and a hook portion, each shank portion having at least one aperture therein, the shank portions being positionable in an overlapping relationship in which the apertures in the shank portions are brought into registry, each hook portion including a concave part and an end part, the concave part of one hook portion confronting the concave part of the other hook portion with the end parts of the hook portions overlapping to define a lock ring when said shank portions are positioned in said overlapping relationship, the improvement wherein the end part of said one hook portion includes a pair of confronting tabs extending from opposite edges of and bent over and spaced from the overlapped part of said one hook portion defining an opening between said tabs and said overlapped part, the end part of said other hook portion being received within said opening and positioned between said tabs and overlapped part when said shank portions are positioned in said overlapping relationship.
Claim 5
Dependent Claim
171 words
A safety lock including a pair of pivotally connected members each having a shank portion and a hook portion, each shank portion having at least one aperture therein, the shank portions being positionable in an overlapping relationship in which the apertures in the shank portions are brought into registry, each hook portion including a concave part and an end part, the concave part of one hook portion confronting the concave part of the other hook portion with the end parts of the hook portions overlapping to define a lock ring when said shank portions are positioned in said overlapping relationship, the improvement wherein one hook portion end part is split at its tip and at least partially along the length thereof to form first and second elements, said first element being offset from said said second element to define an opening therebetween, the other hook portion end part beIng received within said opening and positioned between said first and second elements when said shank portions are positioned in said overlapping relationship.
Claim 6
Dependent Claim
171 words
A safety lock including a pair of pivotally connected members each having a shank portion and a hook portion, each shank portion having at least one aperture therein, the shank portions being positionable in an overlapping relationship in which the apertures in the shank portions are brought into registry, each hook portion including a concave part and an end part, the concave part of one hook portion confronting the concave part of the other hook portion with the end parts of the hook portions overlapping to define a lock ring when said shank portions are positioned in said overlapping relationship, the improvement wherein one hook portion end part is split at its tip and at least partially along the length thereof to form first and second elements, said first element being offset from said said second element to define an opening therebetween, the other hook portion end part beIng received within said opening and positioned between said first and second elements when said shank portions are positioned in said overlapping relationship.
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) | 1975-06-06 | 1975-12-06 | 1976-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-06 | 1979-12-06 | 1980-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-06 | 1983-12-06 | 1984-06-06 | $7700.00 | Window Closed / Lapsed |