Animal waste pumping system

United States Patent [191

[11] 4,445,823

Zyduck [45] May 1, 1984 [54] ANIMAL WASTE PUMPING SYSTEM 4,293,282 10/1981 Nesseth et al. .................... .. 417/551 [75] Inventor: Ronald L. Zyduck, Mosinee, Wis. OTHER PUBLICATIONS [73] Assignee: Acorn Equipment Corp., Stevens “Patz, Manure Movers, Mechanical and Compressed Point, Wis. ' Air Types”, published by Patz, Jul. 1979.

_ “Powerful, Hydraulically Operated Pump Provides [21] Appl. No.. 322,490 Almost Unlimited Vo1ume!”, illustrating pump sold by [22] Filed: Nov. 18, 1981 Hedlund Mfg. Co., Inc. [51] Int. c1.1 ............................................ .. F04B 21/00 Pi$1<>n”, page illustrating Pump Sold

. . . .................................. .. * 1 1- ‘ . [52] U S Cl 4179/24/31023: 975571’ ;‘Bzc11dIger Transfer Pumps”, published by Badger North[52] Field Of Search .............. .. 417/551, 430; 366/332, a“ 11°366/ 333, 257; 92/123, 169, 171, 177 Primary Examiner—Carlton R. Croyle - Assistant Examiner—-Paul F. Neils [56] References Clted Attorney, Agent, or Firm—Quarles & Brady U.S. PATENT DOCUMENTS [57] ABS CT

643,985 2/1900 Salisbury ........................... .. 417/551 _ _ _

665,506 1/1901 Cai'lSOn 92/183 A 11<>1_1°W_ P181011 P1111111 (10) for P11I11P111g 1111111131 W_a$1<= 1,051,092 1/1913 Durham .. 417/430 material including paddles (55, 155, 255) to agitate 1,527,353 Z/1925 Findley -- 417/430 waste material collected in a hopper (11) and aid in its 2,201,739 5/ 1940 N1¢1101S°I1 92/159 transfer into the hollow piston (17), a pumping chamber 1,131-941 1’-/1941 0111111111 -- 417/551 (14) including a cylindrical tube (76), and/or a cylindri2'392'l82 1/1946 Payne """ " 92/183 cal hollow piston (17) having antifriction bearings (90) 3,233,554 2/1966 Huber et a.l .. 417/534 . .

and a seal (91) between its outer surface and the cylin3,687,311 8/1972 Nesseth 214/16 R . . 3,800,751 4/1974 Glassey ct al 92/171 CITICHI Illbfi Of IIIC p1l1Tlpl1'1g chamber 3,872,981 3/1975 Hedlund ..... .. 214/16 R ' 3,981,635 9/1976 Hedlund ............................ .. 417/551 8 Claims, 10 Drawing Figures