Single sheave lifting block

- Mannesmann Demag AG

FIG. 1 is a front perspective view of a single sheave lifting block showing my new design;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a right side elevational view thereof;

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a bottom plan view thereof.

Referenced Cited
U.S. Patent Documents
663905 December 1900 Knight
3446484 May 1969 Walsh et al.
3917334 November 1975 Koster
3992919 November 23, 1976 Jarman
Foreign Patent Documents
842664 October 1957 GBX
Other references
  • The Grosby Group Brochure, p. 71, Model BC-45, 45 Ton Bridge Crane Block.
Patent History
Patent number: D300076
Type: Grant
Filed: Sep 16, 1985
Date of Patent: Feb 28, 1989
Assignee: Mannesmann Demag AG (Duisburg)
Inventors: Uwe Lichtenvort (Essen), Manfred Stoeber (Witten)
Primary Examiner: Wallace R. Burke
Assistant Examiner: Kay H. Chin
Attorney: Ralf H. Siegemund
Application Number: 6/776,569
Current U.S. Class: Element Or Attachment (D34/35)