Title:
MUNICIPAL CASTING FRAME AND METHOD OF MANUFACTURING SAME
Document Type and Number:
WIPO Patent Application WO/2007/116375
Kind Code:
A3
Abstract:
A municipal casting frame with cast nut retainers that allow the frame to be used with or without a bolt-down cover. The frame defines at least one bolt hole to allow free passage of the cover bolts. The undersurface of the frame defines a cast nut retainer adapted to receive a nut. In one embodiment, the nut retainer includes protrusions that permit the nut to be soap-fitted into the nut retainer. In another embodiment, the nut retainer is configured to frictionally receive the nut in a wedging interaction. The present invention also provides a method for manufacturing a frame with integral cast nut retainers. The method includes the steps of providing a core corresponding in shape to the bolt hole and the cast nut retainer, casting a frame in a mold about the core, removing the cast frame from the mold and the core from the cast frame.
Inventors:
SULAK LEON P (US)
RACHWITZ BRIAN J (US)
GEE KEITH A (US)
HARM PAUL F (US)
JOHNSON JEREMY I (US)
RACHWITZ BRIAN J (US)
GEE KEITH A (US)
HARM PAUL F (US)
JOHNSON JEREMY I (US)
Application Number:
PCT/IB2007/051286
Publication Date:
July 14, 2011
Filing Date:
April 10, 2007
Export Citation:
Assignee:
SULAK LEON P (US)
RACHWITZ BRIAN J (US)
GEE KEITH A (US)
HARM PAUL F (US)
JOHNSON JEREMY I (US)
EAST JORDAN IRON WORKS INC (US)
RACHWITZ BRIAN J (US)
GEE KEITH A (US)
HARM PAUL F (US)
JOHNSON JEREMY I (US)
EAST JORDAN IRON WORKS INC (US)
International Classes:
B22C7/00
Foreign References:
| US4723866A | 1988-02-09 | |||
| US4652023A | 1987-03-24 | |||
| US4104347A | 1978-08-01 | |||
| US20060134999A1 | 2006-06-22 | |||
| US7712515B2 | 2010-05-11 |
Attorney, Agent or Firm:
DANI, William, P. et al. (900 Fifth Third Center 111 Lyon Street N.W, Grand Rapids Michigan, US)
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