US 9,810,330 B2
Valve for handling air supply to squeezing pads in a lift head
Steffen E. Næss-Schmidt, Vodskov (DK); and Signe D. Tovgaard, Hobro (DK)
Assigned to Qubiqa A/S, Arden (DK)
Appl. No. 15/313,754
Filed by Qubiqa A/S, Arden (DK)
PCT Filed May 27, 2015, PCT No. PCT/EP2015/061698
§ 371(c)(1), (2) Date Nov. 23, 2016,
PCT Pub. No. WO2015/181231, PCT Pub. Date Dec. 3, 2015.
Claims priority of application No. 14169966 (EP), filed on May 27, 2014.
Prior Publication US 2017/0191575 A1, Jul. 6, 2017
Int. Cl. A47J 45/00 (2006.01); F16K 11/07 (2006.01); B25J 15/00 (2006.01); B25J 15/06 (2006.01); F16K 37/00 (2006.01)
CPC F16K 11/0708 (2013.01) [B25J 15/0023 (2013.01); B25J 15/0616 (2013.01); F16K 37/0025 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A valve operable to control a flow of air into at least one squeezing pad, the flow coming from a high pressure blower, said valve comprising:
a valve chamber comprising a primary set of openings, the primary set comprising:
a first opening fluidly configured to be connected to said high pressure blower to receive the air; and
a second opening fluidly connected to the at least one squeezing pad to enable the air to be at least partially transferred to the at least one squeezing pad,
wherein said valve chamber further comprises a third opening configured to enable the air from said first opening to at least partially pass through said third opening,
wherein said valve further comprises a valve spool configured to block said third opening and thereby change an amount of the air that passes through said third opening,
wherein said valve spool comprises a limiter element extending along a longitudinal axis,
wherein one of said limiter element or said third opening comprises a diameter that varies along the longitudinal axis of said limiter element,
wherein the limiter element is configured to be at least partially inserted along the longitudinal axis in said third opening,
wherein the limiter element is configured so that an extent of the insertion of said limiter element is configured to be controlled,
wherein the extent of insertion of said limiter element changes the amount of the air that passes through said third opening so as to control how much of the air passes through said second opening, and
wherein said limiter element comprises a diameter increasing in a direction away from the third opening.