US3862775A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-reusable locking device and method of use
Assignee: Individual
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Filing: 1973-11-15
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Granted: 1975-01-28
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Expires: 1993-11-15
Abstract
Abstract A case hardened bolt is provided with a case hardened nut which can easily be hand threaded onto it. The shank of the bolt above a threaded portion of approximately the width of the bolt is of a reduced diameter such that the nut can turn freely with respect to the bolt. This portion of reduced diameter is at least as long as the width of the nut. In use, the bolt is passed through at least two hasps which are to be locked in position with respect to each other; the nut is threaded onto the bolt to have position in alignment with the portion of reduced diameter; and the threads on the bolt immediately adjacent the nut are deformed using a hammer and blunt chisel or the like, thus making it impossible for the nut to be removed from the bolt. When it is desired that the hasps be unlocked with respect to each other, the bolt is destroyed by using a bolt cutter on the shank, and the shank portions are removed from the hasps.
Inventors
- 👤 Richard L Gudmundsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:03
CPC Classifications
E; E05; E05B; E05B39/00; E05B39/02; Y; Y10; Y10S; Y10S411/00; Y10S411/924; Y10S411/929; Y10S411/938; Y10T; Y10T292/00; Y10T292/51
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
147 words
A method of using a non-reusable locking device including a bolt having a head, a threaded outer shank of maximum diameter and an intermediate shank section of lesser diameter and including a nut internally threaded of size and configuration to threadably receive said outer shank section and to turn freely on said intermediate shank section, said method including the steps of: A. installing the shank of the bolt of the device in a position to serve as a locking bolt; B. threading the nut over the outer shank section and onto the intermediate section; C. deforming the threads of at least one of said nut and said outer shank section so that the nut cannot possibly be rethreaded on the outer shank section, thus to constitute the device as a permanent lock; and D. destroying the device to release the lock by cutting through the bolt shank.
Claim 2
Independent Claim
147 words
A method of using a non-reusable locking device including a bolt having a head, a threaded outer shank of maximum diameter and an intermediate shank section of lesser diameter and including a nut internally threaded of size and configuration to threadably receive said outer shank section and to turn freely on said intermediate shank section, said method including the steps of: A. installing the shank of the bolt of the device in a position to serve as a locking bolt; B. threading the nut over the outer shank section and onto the intermediate section; C. deforming the threads of at least one of said nut and said outer shank section so that the nut cannot possibly be rethreaded on the outer shank section, thus to constitute the device as a permanent lock; and D. destroying the device to release the lock by cutting through the bolt shank.
Claim 3
Dependent Claim
126 words
In combination with a hasp provided with a lock receiving opening therethrough, a non-reusable device for use as a lock to pass through said provided opening in said hasp, said device including: a. a bolt having a shank of diameter to fit through a lock receiving opening in a hasp, a head at one end of said shank of dimension too large to fit through said opening, an end portion of said bolt shank opposite said head being externally threaded; b. an internally threaded nut having an internal shape and size to threadably receive said threaded portion of said bolt shank and having an external size and shape too large to fit through said lock receiving opening in said hasp; c. said bolt shank also including:
Claim 4
Dependent Claim
126 words
In combination with a hasp provided with a lock receiving opening therethrough, a non-reusable device for use as a lock to pass through said provided opening in said hasp, said device including: a. a bolt having a shank of diameter to fit through a lock receiving opening in a hasp, a head at one end of said shank of dimension too large to fit through said opening, an end portion of said bolt shank opposite said head being externally threaded; b. an internally threaded nut having an internal shape and size to threadably receive said threaded portion of said bolt shank and having an external size and shape too large to fit through said lock receiving opening in said hasp; c. said bolt shank also including:
Claim 5
Dependent Claim
71 words
an intermediate shank section between the inner shank section and the threaded portion of said shank, said intermediate section having a diameter less than that of the innermost diameter of the internally threaded portion of the nut, said intermediate shank section extending between said inner shank section and said threaded portion for a longitudinal distance no less than the similarly measured longitudinal dimension of the internally threaded portion of the nut.
Claim 6
Dependent Claim
71 words
an intermediate shank section between the inner shank section and the threaded portion of said shank, said intermediate section having a diameter less than that of the innermost diameter of the internally threaded portion of the nut, said intermediate shank section extending between said inner shank section and said threaded portion for a longitudinal distance no less than the similarly measured longitudinal dimension of the internally threaded portion of the nut.
Claim 7
Dependent Claim
35 words
The non-reusable device of claim 2 wherein the threads of at least one of said externally threaded shank portion of said bolt and said internally threaded portion of said nut is made of deformable material.
Claim 8
Dependent Claim
19 words
THe non-reusable device of claim 3 where said nut and said bolt head are round in outer peripheral form.
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) | 1978-01-27 | 1978-07-29 | 1979-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-27 | 1982-07-29 | 1983-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-27 | 1986-07-29 | 1987-01-28 | $7700.00 | Window Closed / Lapsed |