Robert C Rawls

US Patent:

8479353, Jul 9, 2013

Filed:

Jul 23, 2009

Appl. No.:

12/460833

Inventors:

Rod Drivstuen - Monroe WA, US
Robert Lee Rawls - Woodinville WA, US

International Classification:

A47L 5/38

US Classification:

15301, 15315

Abstract:

A hose valve for central vacuum cleaning systems that employ retractable suction hoses of the type that retract into a system vacuum pipe. The hose valve comprises a valve box with a connection port wherein a locking assembly is secured within the valve box. The locking assembly includes a compression cylinder. A cylindrical deformable sleeve is coaxially disposed within the compression cylinder. The deformable sleeve is radially inwardly deformable responsive to an axial compressive force. A thrust means is provided for engagement with the compression cylinder to impose a compressing force on the deformable sleeve. The thrust means being axially movable from a first unlocked non-compressing position where the deformable sleeve is in its non-deformed condition, to a second locked compressed position where the deformable sleeve is compressed to cause deformation with its walls collapsing radially inward to form a seal around a retractable hose disposed through the locking assembly.

US Patent:

20110047868, Mar 3, 2011

Filed:

Aug 25, 2009

Appl. No.:

12/547254

Inventors:

Shanthala Mudegowda - Woodinville WA, US
Robert Lee Rawls - Woodinville WA, US

International Classification:

A01G 9/16
F24F 7/00

US Classification:

47 17, 454254

Abstract:

A one piece, nestable, portable mini-greenhouse and plant protector for use in a substrate, such as soil, to protect plants and seedlings from extreme weather elements, bugs and pests. The mini-greenhouse has a light-transmitting shell that forms a protective chamber and integrated legs that act to anchor as well as support the shell. The legs can be fully or partially inserted in the soil providing options for a closed or ventilated protective chamber. The unit has concave channels that facilitate watering without disturbing the apparatus. It has unique light filtering and dispersing properties to aid creating a nurturing and growing environment.

US Patent:

20190365175, Dec 5, 2019

Filed:

Jun 4, 2019

Appl. No.:

16/430752

Inventors:

Rod Drivstuen - Monroe WA, US
Robert Lee Rawls - Woodinville WA, US

International Classification:

A47L 9/24
A47L 5/38

Abstract:

A hose valve sub-assembly designed for use in central vacuum cleaning systems that include a retractable suction hose. The hose valve sub-assembly comprises an end nozzle arranged for attachment with the end of a suction hose and a seal-ring arranged for attachment to a valve box. The seal-ring defines a radially disposed inner surface for receiving and engaging the end nozzle and comprises a radially biased pin for locking the end nozzle the seal-ring. The end nozzle comprises a radially disposed O-ring groove arranged to receive an O-ring for sealing the end nozzle to the inner surface of the seal-ring. The end nozzle also comprises a radially disposed locking track having a first end that defines a first opening arranged to receive and engage the biased pin of the seal ring when the suction hose is pulled through the system vacuum pipe. The locking track includes an opposing second end that defines a second opening arranged to receive the biased pin of the seal ring when the vacuum suction hose is inserted through the valve box, into the seal-ring. With this configuration, the end nozzle is rotatable from a first disengaged position where the biased pin is adjacent one of the two openings, to a second locked position where the biased pin is in the locking track of the end nozzle, between the first opening and second opening.

US Patent:

20170127897, May 11, 2017

Filed:

Oct 5, 2016

Appl. No.:

15/286431

Inventors:

Rod Drivstuen - Monroe WA, US
Robert Lee Rawls - Woodinville WA, US

International Classification:

A47L 9/24
A47L 5/38
B23P 19/04

Abstract:

A hose valve for central vacuum cleaning systems having retractable suction hoses that retract into a system vacuum pipe. The hose valve comprises a valve box, a chamber connection port, and a system pipe connection port arranged to securely engage the chamber connection port. A locking assembly is radially disposed about a locking assembly axis between the chamber connection port and the system pipe connection port. The locking assembly comprises a coaxially disposed compression cylinder having a radially outer cylinder surface arranged to define symmetrically disposed helical grooves. A cylindrical deformable sleeve is coaxially disposed adjacent the compression cylinder and is radially inwardly deformable responsive to an axial compressive force. A thrust ring is disposed adjacent the chamber connection port and defines a radially inner surface having opposing inner post groove followers arranged to engage the helical grooves of the compression cylinder to urge the compression cylinder axially toward the system pipe connection port to compress the deformable sleeve to form a seal around a vacuum suction hose.