JOHN E MCCULLOUGH
Engineering in Carlisle, MA

4424010, Jan 3, 1984

Oct 19, 1981

6/312745

John E. McCullough - Carlisle MA

Arthur D. Little, Inc. - Cambridge MA

F04B 1700, F04C 202

417420

A scroll-type fluid motor or pump is provided with a roller Oldham coupling and bearing for guiding the orbiting scroll wrap relative to the fixed wrap, the coupling including plural, equal diameter cylindrical rollers disposed in overlapping but equally offset cylindrical openings forming bearing surfaces for the rollers. The diameter of each roller is such as to maintain the offset distance so that the orbiting scroll wrap is precisely guided relative to a fixed scroll wrap, whereby radial loads are fully carried by large rolling surfaces provided by the rollers. A magnetic drive system for the orbiting scroll is also disclosed.

4927340, May 22, 1990

Aug 19, 1988

7/234098

John E. McCullough - Carlisle MA

Arthur D. Little, Inc. - Cambridge MA

F01C 104, F16D 304

418 55

A scroll fluid device is provided with a synchronizer arrangement that prevents relative rotation between the involute scroll wraps defining fluid working chambers while permitting the wraps to orbit relative to each other to perform work on fluid moved through the device or to expend work through the reaction of fluid moving through the device. The synchronizer comprises axially extending teeth affixed to one of the scroll support end plates interdigited with grooves affixed to the other end plate. The grooves of the synchronizer each have a width that accommodates the orbital excursion of each tooth extending into the groove such that, during orbital movement of one scroll wrap relative to the other, the teeth engage the side walls of the groove to prevent rotation of the scroll wraps relative to each other in either direction. The synchronizer also permits movement of one scroll wrap relative to the other along a line generally extending between the involute centers of the wraps in a direction that reduces the orbit radius.

4463591, Aug 7, 1984

Apr 25, 1983

6/488469

John E. McCullough - Carlisle MA

Arthur D. Little, Inc. - Cambridge MA

B21D 2200, B21D 3100, B21D 1702

72360

Method for forming scroll members comprising an end plate having an involute wrap rigidly affixed thereto. The end plate and involute wrap are precision formed, e. g. , by casting, either as an integral element or as two separate elements and then the scroll member is coined to the desired dimensional accuracy and finish. If a separate end plate and an involute wrap are provided for coining, then they are rigidly joined during coining, an embodiment which permits the use of two different materials and/or the attainment of two different surface characteristics for the involute wrap and the end plate.

4082484, Apr 4, 1978

Jan 24, 1977

5/761889

John E. McCullough - Carlisle MA

Arthur D. Little, Inc. - Cambridge MA

F04C 1702, F04C 2910

418 55

A positive fluid displacement scroll apparatus (compressor or expander) wherein the scroll members run with a small clearance between the wrap side flanks, thus essentially eliminating wearing of the wraps. When efficient radial sealing is attained, very little overall efficiency is sacrificed for the ability to construct low-cost scroll apparatus for a number of uses.

4911621, Mar 27, 1990

Jun 20, 1988

7/208915

John E. McCullough - Carlisle MA
Niels O. Young - Eagle ID

Arthur D. Little, Inc. - Cambridge MA

F01C 104, F01C 1700, F16D 304, F16D 354

418 55

A scroll fluid device is provided with a toothed ring synchronizer coupled to sprocket teeth provided of each scroll wrap back plate. The coupling between the teeth does not restrict relative axial motion between the scroll wraps and evenly distributes torque loads resulting from forces tending to rotate one wrap relative to the other between the back plates. The ring synchronizer may include internal or external teeth cooperating with adjoining sprocket teeth provided on the scroll back plates.

5286179, Feb 15, 1994

Feb 20, 1992

7/837965

Ronald J. Forni - Lexington MA
Robert M. Lucas - Lynnfield MA
John E. McCullough - Carlisle MA
Richard J. Whitehead - Chelmsford MA
Shigeki Hagiwara - Sakai, JP
Hiromichi Ueno - all os Sakai, JP
Katsumi Sakitani - all os Sakai, JP
Yoshitaka Shibamoto - all os Sakai, JP
Hiroyuki Taniwa - all os Sakai, JP

Arthur D. Little, Inc. - Cambridge MA

F01C 104, F01C 2104, F01C 2106

418 551

A thermal isolation arrangement for use in a co-rotating scroll refrigerant compressor includes various thermal insulation elements adapted to minimize heat transfer between hot rotating members of the scroll fluid device and the return refrigerant to be compressed, and between hot lubricant in the compressor and the return refrigerant. The thermal isolation elements of the present invention may be used individually or collectively to minimize the preheating of the inlet refrigerant so as to maintain the density of the return refrigerant being compressed to thereby increase the total efficiency of the scroll fluid device.

5247795, Sep 28, 1993

Apr 1, 1992

7/861574

John E. McCullough - Carlisle MA

Arthur D. Little, Inc. - Cambridge MA

F02B 3344

606051

An expander driven compressor assembly is disclosed comprising a scroll-type expander having at least one pair of meshed axially extending involute spiral wraps wherein one of the wraps orbits relative to the other wrap and a scroll-type compressor having at least one pair of relatively orbiting meshed axially extending involute spiral wraps. The orbital wrap of the expander is drivingly connected to the orbital wrap of the compressor through a common synchronizer and counterweight assembly. Auxiliary drive power developed by the expander and not required to drive the compressor is used to drive a power take-off shaft. In addition, expansion struts are proved to compensate for thermal expansion or contraction of the relatively orbiting scroll wraps. By this arrangement, a compact and efficient expander driven compressor assembly is achieved.

4129405, Dec 12, 1978

Jun 17, 1977

5/807413

John E. McCullough - Carlisle MA

Arthur D. Little, Inc. - Cambridge MA

F04C 1102, F04C 1502, F01C 2104, F01C 2106

418 55

Scroll apparatus for pumping liquids wherein recessed liquid transfer passage means are provided in the end plates of the scroll members. The transfer passage means may be inner passages within the scroll involutes, outer passages outside the scroll involutes or a combination of inner and outer passages. These passages are located and configured to be opened substantially immediately after the orbiting involute wrap has reached that point in its orbiting cycle to define three essentially completely sealed-off liquid zones. These passages remain open at least until the liquid passages between the wraps are sufficiently large to prevent any substantial pressure pulsations within the scroll liquid pump. The scroll liquid pumps may be operated to pump liquid radially inward or outward.

4121438, Oct 24, 1978

Sep 13, 1976

5/722713

John E. McCullough - Carlisle MA

Arthur D. Little, Inc. - Cambridge MA

F16D 304

64 31

A coupling member particularly suited for coupling two components in a predetermined angular relationship while one component is orbited relative to the other. The coupling member comprises a ring having pairs of oppositely disposed keys on opposite annular surfaces, one pair of keys being displaced 90. degree. from the other. The keys are held on pivot pins affixed to the ring, the pivot pins preferably having flanges which are set in counterbores in the ring. A plurality of axial force-stabilizing disks are also inset on the annular ring surfaces.

4065279, Dec 27, 1977

Sep 13, 1976

5/722695

John E. McCullough - Carlisle MA

Arthur D. Little, Inc. - Cambridge MA

F25B 104, F16C 1704, F01C 102, F04C 1702

62510

A flat plate hydrodynamic thrust bearing for orbiting machinery and scroll-type apparatus embodying the thrust bearing are disclosed. The thrust bearing exerts an axial force on the orbiting scroll member to ensure efficient radial sealing of the scroll assembly; and one of the contacting surfaces of the bearing and or of the orbiting scroll member, serving as a journal, has a plurality of intersecting groovings to ensure continuous lubrication of the surfaces. The scroll apparatus is particularly suited for incorporation in a closed cycle refrigeration system wherein minimum wear over extended periods and quiet and reliable operation are required.