Safety chain lock for a door or similar structure

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Description

FIG. 1 is a frontal perspective view of a safety chain lock for a door or similar structure showing our design.

FIG. 2 is a rear perspective view thereof, having the locking bolt in space relation to the lock.

FIG. 3 is a broken front elevational view showing the locking bolt in space relation to the lock.

FIG. 4 is a broken top plan view thereof.

FIG. 5 is a broken left hand view of the locking mechanism.

FIG. 6 is a right hand view of the lock and bolt mechanism.

Referenced Cited
U.S. Patent Documents
D221375 August 1971 Saito
D223228 April 1972 Padleckas
D226944 May 1973 Bobrowski
D227410 June 1973 Yip
D229163 November 1973 Bobrowski
D234452 March 1975 Saito
1472206 October 1923 Buekle
3950019 April 13, 1976 Dugan
3999408 December 28, 1976 Kawakami
4027908 June 7, 1977 Crepinsek
4105231 August 8, 1978 Huyssen
Other references
  • Home Furnishing Daily, 3/28/62, p. 18, Security Hardware Co., "Chain Dor-Loc", ad display.
Patent History
Patent number: D274125
Type: Grant
Filed: Jun 7, 1982
Date of Patent: Jun 5, 1984
Inventors: Kenneth A. Hardesty (Encinitas, CA), Robert R. Allen, II (Palm Springs, CA)
Primary Examiner: Wallace R. Burke
Assistant Examiner: Horace B. Fay
Attorney: John L. Haller
Application Number: 6/385,937
Classifications
Current U.S. Class: D/8341; D/8340