US 11,940,054 B2
Safety valve for hydraulic or pneumatic tool
Luke Roger Gosden, Byford (AU)
Assigned to Ogon Contracting Pty Ltd., Byford (AU)
Filed by Ogon Contracting Pty Ltd., Byford (AU)
Filed on Aug. 6, 2021, as Appl. No. 17/395,599.
Application 17/395,599 is a continuation of application No. 16/796,995, filed on Feb. 21, 2020, granted, now 11,112,018.
Application 16/796,995 is a continuation of application No. 15/544,525, granted, now 10,571,032, issued on Feb. 25, 2020, previously published as PCT/AU2016/050024, filed on Jan. 19, 2016.
Claims priority of application No. 2015900326 (AU), filed on Feb. 3, 2015.
Prior Publication US 2021/0364097 A1, Nov. 25, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. F16K 11/07 (2006.01); F16K 17/168 (2006.01); F16K 31/44 (2006.01); F16K 31/60 (2006.01); F16K 35/02 (2006.01); F16P 3/00 (2006.01); F04B 23/00 (2006.01); F15B 13/04 (2006.01); F15B 20/00 (2006.01); F16K 21/04 (2006.01); F16K 27/02 (2006.01)
CPC F16K 11/0716 (2013.01) [F16K 11/07 (2013.01); F16K 17/168 (2013.01); F16K 31/44 (2013.01); F16K 31/602 (2013.01); F16K 35/025 (2013.01); F16P 3/00 (2013.01); F04B 23/00 (2013.01); F15B 13/0401 (2013.01); F15B 20/00 (2013.01); F16K 21/04 (2013.01); F16K 27/0263 (2013.01); Y10T 137/86107 (2015.04); Y10T 137/87249 (2015.04)] 17 Claims
OG exemplary drawing
 
1. A safety valve for a hydraulic or pneumatic tool, the safety valve comprising:
a body defining an incoming fluid passage via which fluid is able to pass from a fluid reservoir through the body to a tool head, and a return fluid passage via which fluid is able to return from the tool head through the body to the fluid reservoir;
a first position within the body, wherein the fluid is able to bypass the tool head and return to the fluid reservoir to prevent operation of the tool head, and at a second position within the body, wherein the fluid is able to flow to the tool head to allow operation of the tool head;
a biasing means operatively biasing to either a fail-safe position or a fail-dangerous position; and
an actuator positioned on an outside portion of the body, wherein the actuator is hand-operated and configured so that actuation thereof counteracts the biasing means and actuates the tool head into an inactive or active mode of operation.