US 11,896,187 B2
Central vacuum system and inlet valves therefor
Darrell V. Nieschwitz, Louisville, OH (US); Greg A. Calderone, Canton, OH (US); and Shawn C. Metz, Louisville, OH (US)
Assigned to H-P PRODUCTS, INC., Louisville, OH (US)
Filed by H-P Products, Inc., Louisville, OH (US)
Filed on Jan. 27, 2021, as Appl. No. 17/159,694.
Application 17/159,694 is a continuation of application No. 16/287,168, filed on Feb. 27, 2019, granted, now 11,096,534.
Application 16/287,168 is a continuation of application No. 15/886,319, filed on Feb. 1, 2018, granted, now 10,820,763, issued on Nov. 3, 2020.
Application 15/886,319 is a continuation in part of application No. 15/675,228, filed on Aug. 11, 2017, granted, now 10,433,690, issued on Oct. 8, 2019.
Application 15/886,319 is a continuation in part of application No. 17/159,694.
Application 17/159,694 is a continuation in part of application No. 14/570,159, filed on Dec. 15, 2014, granted, now 9,782,047, issued on Oct. 10, 2017.
Claims priority of provisional application 62/457,558, filed on Feb. 10, 2017.
Claims priority of provisional application 61/923,949, filed on Jan. 6, 2014.
Prior Publication US 2021/0145226 A1, May 20, 2021
Int. Cl. A47L 5/38 (2006.01); A47L 9/24 (2006.01); A47L 9/00 (2006.01); B60P 3/36 (2006.01); F16L 29/00 (2006.01); B60S 1/64 (2006.01)
CPC A47L 5/38 (2013.01) [A47L 9/0063 (2013.01); A47L 9/242 (2013.01); A47L 9/244 (2013.01); B60P 3/36 (2013.01); F16L 29/00 (2013.01); B60S 1/64 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A device for connection with a hose end, the device comprising:
a first end opposite a second end defining a longitudinal direction therebetween, and the second end adapted to connect with the hose end and the device adapted to be coupled with a vacuum conduit;
a longitudinal axis extending from the first end to the second end;
a cylindrical wall extending longitudinally between the first end and the second end, the cylindrical wall defining an interior bore adapted to receive vacuumed debris therethrough after passing through the vacuum hose, and the cylindrical wall defining an annular channel extending at least partially circumferentially around the longitudinal axis;
a first seal extending circumferentially around the longitudinal axis; and
a first cam adjacent the annular channel and the first cam having first and second sloped walls extending between the cylindrical wall and a first outer apex, each of the first and second sloped walls and the first outer apex collectively defining a generally inverted V-shaped configuration, wherein the first outer apex is adapted to depress a first button from a position near the cylindrical wall.