Combined hoisting and positioning arm

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Description

FIG. 1 is a side elevation view of the combined hoisting and positioning arm showing our new design;

FIG. 2 is a top view;

FIG. 3 is a rear elevational view;

FIG. 4 is a front elevational view;

FIG. 5 is a bottom view.

Referenced Cited
U.S. Patent Documents
2786434 March 1957 Klungtvedt
3814413 June 1974 Bopp
3883105 May 1975 Matsumoto
Other references
  • New Equipment Digest, 3/1976, p. 113, Hydraulic Crane.
Patent History
Patent number: D254608
Type: Grant
Filed: Aug 18, 1977
Date of Patent: Apr 1, 1980
Assignee: Mefferd Industries, Inc. (Laurens, IA)
Inventors: Paul S. Mefferd (Laurens, IA), Thomas A. Mefferd (Laurens, IA)
Primary Examiner: Wallace R. Burke
Assistant Examiner: B. J. Bullock
Attorneys: Rudolph L. Lowell, G. Brian Pingel
Application Number: 5/825,550
Classifications
Current U.S. Class: D12/54
International Classification: D1205;