Activating apparatus in a liquid conveying system operated by vacuum, preferably a so-called vacuum sewage system

• US 4,511,117 A
• Filed: 12/08/1983
• Issued: 04/16/1985
• Est. Priority Date: 12/15/1982
• Status: Expired due to Fees

• Current Assignee: Oy Wartsila AB
• Original Assignee: Aktiebolaget Electrolux
• Inventors: Soderstrom, Sigvard V.
• Primary Examiner(s): NOT, DEFINED
• Application Number:
  US06/559,476
• Time in Patent Office: 495 Days
• Field of Search: 4/249, 4/328, 4/361, 4/362, 4/405, 4/407, 4/408, 4/431, 4/434, 92/15, 92/132, 92/24, 92/25, 92/27, 92/28, 92/29, 92/84, 92/94, 251/73, 251/75, 91/446
• US Class Current: 251/73
• CPC Class Codes: E03F 1/006 Pneumatic sewage disposal systems; accessories specially adapted therefore

Abstract

An activating apparatus or device, for example for a valve in a liquid conveying system operated by means of a vacuum. The activating apparatus comprises a normally latched or locked operating device which by means of a spring, or the like, is connected to a force accumulator. The force accumulator is moved by the influence of vacuum and thereby tightens the spring which, when a lock arm disengages from the operating device, is released so that the operating device is moved, and thereby opens the valve.

Claims

1. In an actuating apparatus for a liquid conveying system operated by means of a vacuum, such as a vacuum sewage system having a valve, the improvement comprising:

an operating device for said valve movable between a first and second position, a housing, a chamber, a force accumulator which is movable with respect to said housing, the housing and the force accumulator forming parts of said chamber which is connected to the vacuum of said system and is contractable under the influence of the vacuum in said chamber, means being coupled between said operating device and said force accumulator, a latching member coacting with said operating device by retaining the latter in said first position, while said force accumulator initially is actuated by means of the vacuum, said force accumulator being operatively connected to said operating device in such a manner that when said latching member is released, the operating device is moved to said second position by said means, said operating device being provided with a movable arm having a projection at a free end, said latching member being in the form of a second arm, said projection being latched by means of a spring biasing said second arm into engagement therewith, and said second arm during the movement of said force accumulator being acted upon by said force accumulator whereby said projection is released from said second arm and the operating device moves to the second position to cause said valve to operate.

2. An actuating apparatus as claimed in claim 1 further comprising diaphragm being fastened to said housing and the force accumulator, said means comprising a tension spring, and said force accumulator being provided with a compression spring.