Title:
【発明の名称】2シリンダ・濃厚材料ポンプのための制御装置
Document Type and Number:
Japanese Patent JP2604046
Kind Code:
B2
Abstract:
PCT No. PCT/EP89/00273 Sec. 371 Date Nov. 27, 1990 Sec. 102(e) Date Nov. 27, 1990 PCT Filed Mar. 15, 1989 PCT Pub. No. WO89/11037 PCT Pub. Date Nov. 16, 1989.A two cylinder thick matter pump has two hydraulic drive cylinders, two pistons supported and driven within each respective drive cylinder, and two feed cylinders. Each feed cylinder is adapted to receive a respective piston therein to pump the matter therethrough. A hydro-pump is coupled to the drive cylinders to supply hydraulic fluid thereto. A reversing valve is coupled to the hydro-pump to reverse the direction thereof. Two pressure switching valves are coupled to one of the drive cylinders and to the reversing valve to actuate the reversing valve upon a change in cylinder pressure. Two electronic proximity switches are supported adjacent to the pistons and coupled to the reversing valve. The proximity switches actuate the reversing valve in parallel with the switching valves.
Inventors:
Dose Rolf
Benkart hartmut
Benkart hartmut
Application Number:
JP50295689A
Publication Date:
April 23, 1997
Filing Date:
March 15, 1989
Export Citation:
Assignee:
Putzmeister Werk Maschinenfabrik Gesellschaft Mitt Beschlenktel Haftung
International Classes:
F04B9/10; F04B9/117; F04B15/02; (IPC1-7): F04B15/02
Attorney, Agent or Firm:
Takehisa Ito