US 11,751,885 B2
Pressurized gas engine and method of operating a pressurized gas engine
Sebastian Vogt, Wehrheim (DE); and Thomas Kluge, Wehrheim (DE)
Assigned to Heraeus Medical GmbH, Wehrheim (DE)
Filed by Heraeus Medical GmbH, Wehrheim (DE)
Filed on Oct. 12, 2020, as Appl. No. 17/68,264.
Claims priority of application No. 19208962 (EP), filed on Nov. 13, 2019.
Prior Publication US 2021/0137548 A1, May 13, 2021
Int. Cl. A61B 17/16 (2006.01); A61B 17/14 (2006.01); F15B 11/076 (2006.01); F15B 11/15 (2006.01); A61B 17/3203 (2006.01); F15B 15/14 (2006.01); A61B 17/00 (2006.01); F15B 15/17 (2006.01)
CPC A61B 17/1628 (2013.01) [A61B 17/14 (2013.01); A61B 17/1659 (2013.01); A61B 17/3203 (2013.01); F15B 11/076 (2013.01); F15B 11/15 (2013.01); F15B 15/1476 (2013.01); A61B 2017/00398 (2013.01); A61B 2017/00544 (2013.01); A61B 2017/32035 (2013.01); F15B 15/17 (2013.01)] 24 Claims
OG exemplary drawing
 
1. A compressed gas motor comprising:
a cylinder jacket wall defining a hollow cylinder with a front base and a rear base, the cylinder jacket wall having at least one ventilation opening;
a rear closure at the rear base of the hollow cylinder;
a drive rod projecting out of the hollow cylinder and having a front end;
a plunger having a front end connected with the drive rod and being axially movable in the hollow cylinder, wherein the plunger divides the hollow cylinder in a non-gas-tight manner into a back inner chamber delimited by the plunger, the cylinder jacket wall, and the rear closure and a front inner chamber delimited by the plunger, the cylinder jacket wall, and the front base, wherein the at least one ventilation opening in the cylinder jacket wall is configured to connect the back inner chamber of the hollow cylinder with surrounding atmosphere for passage of gas during operation of the compressed gas motor and wherein the at least one ventilation opening periodically opens toward the back inner chamber during operation of the compressed gas motor by movement of the plunger;
at least one compressed gas port connected into the back inner chamber of the hollow cylinder and configured to introduce a pressurized compressed gas into the back inner chamber; and
at least one compression spring being arranged in the front inner chamber and resting during operation of the compressed gas motor at least temporarily against the front base of the hollow cylinder and/or at least one tension spring being arranged in the back inner chamber and connected with the plunger and with the rear closure of the hollow cylinder, wherein the at least one compression spring urges the plunger to such an extent toward the rear closure and/or the at least one tension spring draws the plunger to such an extent toward the rear closure that the back inner chamber of the hollow cylinder is closed relative to the at least one ventilation opening by the plunger and the back inner chamber is connected with the at least one compressed gas port when the same pressure prevails in the front inner chamber of the hollow cylinder and in the back inner chamber of the hollow cylinder.