Donald E Haugen

US Patent:

41611578, Jul 17, 1979

Filed:

May 13, 1977

Appl. No.:

5/796591

Inventors:

Donald J. Haugen - Ann Arbor MI

International Classification:

A01K 100

US Classification:

119 1

Abstract:

An enclosed litter container for animals, the container having upper and lower enclosure portions coupled together to provide an enclosed space. The upper enclosure portion has an opening therein to provide access for an animal to the enclosed space. The lower enclosure portion defines a cavity for containing litter. The upper enclosure portion includes a widened rim portion, and the lower enclosure portion includes a mating widened flange portion. Part of the widened rim portion of the upper enclosure portion includes a downwardly convex convolution having a vertex or free extremity extending into the enclosed space. The construction prevents urine from collecting in and/or escaping from the joint between the enclosure portions. A series of downwardly sloped channels in the widened flange portion of the lower enclosure portion help direct the urine toward the litter.

US Patent:

D2483335, Jun 27, 1978

Filed:

Jan 24, 1977

Appl. No.:

5/761980

Inventors:

Donald Haugen - Ann Arbor MI

International Classification:

D3006

US Classification:

D30 41

US Patent:

41111575, Sep 5, 1978

Filed:

Jan 24, 1977

Appl. No.:

5/761990

Inventors:

Donald Haugen - Ann Arbor MI

International Classification:

A01K 2900
A47K 1102

US Classification:

119 1

Abstract:

An enclosed litter container for animals, the container having upper and lower enclosure portions which are joined together to form an enclosed space. The upper enclosure portion includes an opening to provide access for an animal to the enclosed space. The upper portion also includes a depending flange which fits within a widened rim of the lower portion of the litter container to restrainingly couple the two portions together and to seal the joint between the portions to prevent escape of urine therefrom. The upper enclosure portion includes an outwardly bowed compressible resilient section which, when compressed, causes the depending flange to move out of restraining engagement with the widened rim of the lower portion to facilitate separation of the enclosure portions. The depending flange and the widened rim portion are configured so as to direct urine away from the region of the joint between the two enclosure portions and toward the bottom of the lower enclosure portion which contains the litter.