Locking device for telescopic displaceable tubes

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Description

FIG. 1 is a side elevation of a locking device embodying my new design;

FIG. 2 is an elevation thereof, as viewed from the right-hand side of FIG. 1;

FIG. 3 is an elevation thereof, as viewed from the left-hand side of FIG. 1; and

FIG. 4 is a vertical section thereof, taken on the plane 4--4, indicated in FIG. 1.

Referenced Cited
U.S. Patent Documents
D241618 September 1976 Toomigas
3283640 November 1966 Ono
3766819 October 1973 Giannuzzi
4033222 July 5, 1977 Wilson
4089249 May 16, 1978 Binns
4242939 January 6, 1981 Osborne et al.
Other references
  • P. 74 of Hardware Age, Jun. 30, 1960, Arro Expansion Bolt Co., Stud Bolt Anchor. Design Fasteners Book, .COPYRGT.1960, p. 191, McCormick-Selph Explosive Bolt.
Patent History
Patent number: D268393
Type: Grant
Filed: Nov 6, 1980
Date of Patent: Mar 29, 1983
Inventor: Frode Fron (1601 Fredrikstad)
Primary Examiner: Bernard Ansher
Law Firm: Howson and Howson
Application Number: 6/204,453
Classifications
Current U.S. Class: D/8385
International Classification: D0808;