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Allen Kalkhoven Phones & Addresses

  • 12990 H St, Nehalem, OR 97131
  • 17660 SW Oak St, Beaverton, OR 97007
  • 17660 SW Oak St #S, Beaverton, OR 97007
  • Aloha, OR

Publications

Us Patents

Manhole Construction

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US Patent:
40235904, May 17, 1977
Filed:
Oct 20, 1975
Appl. No.:
5/623720
Inventors:
James R. Harris - Portland OR
Allen B. Kalkhoven - Beaverton OR
Assignee:
The Oregon Drop Corporation - Portland OR
International Classification:
E02D 2912
US Classification:
137363
Abstract:
An integral passageway is formed in a manhole construction to establish communication between an upper inlet to the manhole and a bottom outlet. Precast sections having such a passageway formed therein may be employed to build a desired height of the manhole, an upper one of the sections having an inlet for connection to a service line and the precast sections being stacked such that the upright passageways therein are in vertical alignment.
Allen B Kalkhoven from Nehalem, ORDeceased Get Report