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US3709401A Expired / Lapsed US ⏱️ 0.0 years remaining

Tamper resistant fastening apparatus

Assignee: IDEAVELOPMENT Inc
•
Filing: 1970-10-30
•
Granted: 1973-01-09
•
Expires: 1990-10-30
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Abstract

Abstract A fastening apparatus including a rachet-type tool adapted to transmit torque to a nut-type fastener. The tool includes a handle mounted to one or a plurality of tubular-type roller clutches which have the property of providing torque in only one direction. Openings in the handle are provided to enable a roller clutch to transmit unidirectional torque to the nut-type fastener and to allow the user to select the direction of this torque by selection of the appropriate opening. The particular configuration and material of the nut-type fastener is such that contact made by any device other than said tool for purposes of applying torque thereto would be reasonably detectable from subsequent examination of said fastener. A recessed portion of a fastened member is provided in which the nut-type fastener is attached to a complementary fastening member, said recessed portion being of special configuration adapted to receive the said tool for purposes of engaging the nut-type fastener while preventing access of commonly available tools.

Inventors

  • 👤 L Walstrom

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-05 15:09
CPC Classifications
G; G01; G01R; G01R11/00; G01R11/02; G01R11/24; B; B25; B25B; B25B13/00; B25B13/48; B25B13/481; B25B13/485; Y; Y10; Y10S; Y10S411/00; Y10S411/91; Y10T; Y10T292/00; Y10T292/08; Y10T292/1099

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 110 words
In an enclosure formed by a base, side walls and a cover, the improvement which comprises: a recessed portion in said cover, said recessed portion having an aperture; a threaded member having an axis, said threaded member extending from the base and passing through said aperture; and means engaging said threaded member for holding said cover in place, said means having one generally flat surface from which a threaded bore extends, the remainder of the surface of said means being smooth and generally arcuate having no depressions or indentations, said means being positioned within said recess such that it may be approached only along the axis of said threaded member.
Claim 2
Dependent Claim 110 words
In an enclosure formed by a base, side walls and a cover, the improvement which comprises: a recessed portion in said cover, said recessed portion having an aperture; a threaded member having an axis, said threaded member extending from the base and passing through said aperture; and means engaging said threaded member for holding said cover in place, said means having one generally flat surface from which a threaded bore extends, the remainder of the surface of said means being smooth and generally arcuate having no depressions or indentations, said means being positioned within said recess such that it may be approached only along the axis of said threaded member.
Claim 3
Dependent Claim 29 words
The combination of claim 1 wherein said recessed portion has a base and side wall, the recessed portion side wall forming a generally right angle with the enclosure cover.
Claim 4
Dependent Claim 21 words
The combination of claim 2 wherein the recessed portion side wall forms a generally right angle with the recessed portion base.
Claim 5
Dependent Claim 37 words
The combination of claim 3 wherein the improvement further comprises a bushing surrounding said threaded member and extending from said base to the recessed portion base, said bushing being larger than the aperture in the recessed portion.
Claim 6
Dependent Claim 51 words
The combination of claim 4 wherein the arcuate surface of said engaging means comprises a first portion of a generally cylindrical configuration and a second portion of a configuration generally corresponding to the shape of one half of a sphere, the diameters of said first and second portions being substantially identical.

References Cited (Backward Citations)

CA653952A Cited
US946329A Cited
US1373617A Cited
GB324581A Cited
US2613942A Cited
GB907873A Cited
US3045400A Cited
US3393597A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1976-01-09 1976-07-10 1977-01-09 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1980-01-09 1980-07-10 1981-01-09 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1984-01-09 1984-07-10 1985-01-09 $7700.00 Window Closed / Lapsed

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