U.S. patent number 3,885,892 [Application Number 05/364,812] was granted by the patent office on 1975-05-27 for housing assembly for air compressor and the like.
This patent grant is currently assigned to The Black and Decker Manufacturing Company. Invention is credited to John Earl Dibbern, Jr., John Robert Dwyer, Alfred Herbert Judge, Martin Omer Schrock.
United States Patent |
3,885,892 |
Dwyer , et al. |
May 27, 1975 |
Housing assembly for air compressor and the like
Abstract
A portable electric air compressor comprising a housing
enclosing and supporting an air compressor sub-assembly. The
housing includes separable upper and lower insulating members and
an integral handle set into an annular recess for receiving and
storing a compressor hose. The housing defines a neat and
aesthetically pleasing appearance, and the handle is constructed
and disposed for easy handling of the unit. The interconnection
between the housing and the compressor sub-assembly is constructed
for maximum vibration isolation and sound deadening, and is
designed for ease of assembly and cool operation.
Inventors: |
Dwyer; John Robert (Timonium,
MD), Schrock; Martin Omer (Baltimore, MD), Dibbern, Jr.;
John Earl (Baltimore, MD), Judge; Alfred Herbert
(Baltimore, MD) |
Assignee: |
The Black and Decker Manufacturing
Company (Towson, MD)
|
Family
ID: |
23436192 |
Appl.
No.: |
05/364,812 |
Filed: |
May 29, 1973 |
Current U.S.
Class: |
417/234; 417/363;
417/313 |
Current CPC
Class: |
F04B
39/12 (20130101); F04B 35/04 (20130101) |
Current International
Class: |
F04B
35/00 (20060101); F04B 39/12 (20060101); F04B
35/04 (20060101); F04b 021/00 () |
Field of
Search: |
;417/313,902,321,360,363,423A,312,234 ;128/66 ;4/182
;D7/166,167,168 ;15/323,327D |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
Primary Examiner: Freeh; William L.
Assistant Examiner: Sessions; O. T.
Attorney, Agent or Firm: Slotnik; Joseph R. Murphy; Edward
D. Bloom; Leonard
Claims
I claim:
1. A housing assembly for an air compressor of the type comprising
a portable, power driven air compressor, housing means enclosing
and supporting said air compressor, said air compressor having
inlet valve means for admitting air thereto, said housing assembly
comprising a housing having inlet openings formed therein adjacent
said inlet valve means, resilient sleeve means engaging said
housing and said air compressor adjacent said inlet openings and
said inlet valve means, said resilient sleeve forming a resilient
shock absorbing mounting for said compressor adjacent said housing
and forming an expansion muffling chamber for said inlet valve
means, whereby to substantially reduce operational noise of said
compressor, said compressor having discharge means, air hose means
connected to said discharge means and extending through said
housing.
2. A housing assembly for a portable, electric, air compressor as
claimed in claim 1 wherein said housing comprises separable housing
members adapted to entrappingly contain said air compressor
therein, said housing members being formed of an electrically
insulating material, said housing members forming a container whose
top is provided with a substantially annular recess therein, a
central handle integral with said top and disposed in said recess
and forming carrying means for said compressor, said compressor
having air hose means connected thereto and extending through an
opening in said housing within said recess, said air hose being
adapted to be stored within said recess about said handle.
3. A housing assembly for a portable, electric, air compressor
comprising upper and lower separable housing members, said air
compressor including laminations disposed in said lower member and
transversely supported upon and longitudinally clamped by ribs
integral therewith, said upper member being formed with ribs which
transversely support and longitudinally clamp said laminations when
secured to said lower member, said housing members being formed of
an electrically insulating material, and said housing members
forming a container for said air compressor.
4. A housing assembly for a portable electric air compressor
comprising upper and lower housing members arranged to receive and
support a self-contained air compressor therebetween, said upper
and lower members respectively including internal partitions
extending vertically within said members and shaped to provide a
seat for said compressor, resilient means interposed between said
compressor and said partitions to tightly clamp said compressor to
said housing, said air compressor having inlet valve means for
admitting air thereto, inlet openings formed in at least one of
said upper and lower housing members adjacent said inlet valve
means, resilient sleeve means extending between and engaging said
housing and said air compressor respectively adjacent said inlet
openings and said inlet valve means, said resilient sleeve forming
a resilient shock absorbing mounting for said compressor adjacent
said housing and forming an expansion muffling chamber for said
inlet valve means to substantially reduce operating noise of said
valves transmitted through said inlet opening, said compressor
having discharge means, and air hose means connected to said
discharge means and extending through said housing.
5. A housing assembly for a portable, electric, air compressor
comprising a pair of separable housing members arranged to receive
and support a self-contained air compressor therebetween, each of
said members including an internal rib for receiving said
compressor, each of said ribs including a slot-shaped region
defined between a pair of tapered walls, said compressor including
an external portion received within said slot-shaped regions and
clamped therein by said tapered walls to securely mount said
compressor within said housing.
Description
SUMMARY OF THE INVENTION
The present invention is directed to a housing assembly for an air
compressor or the like which encloses and efficiently supports an
air compressor sub-assembly for quiet and cool operation. In
addition, the housing assembly serves to help isolate the air
compressor sub-assembly, and, in the case of an electric version,
assists in electrical insulation so that the unit is relatively
free from vibration and is double insulated. Furthermore, the
housing includes an integral handle for ease in carrying, and the
latter is set into and surrounded by an annular recess for
convenient storage of the compressor hose when the unit is not in
use. The described housing presents a neat and esthetically
pleasing appearance which is devoid of unsightly fasteners and the
like. Still further, the assembled unit is small, compact, and is
well balanced for easy handling and storage, and is ideally suited
for use by home owners as well as in more demanding
environments.
The main objects, therefore, of the present invention are to
provide a novel housing assembly for a portable, air compressor, or
the like, including an electric powered, air compressor
sub-assembly, wherein the housing construction neatly and
efficiently encloses, supports, and electrically insulates and
vibrationally isolates the air compressor sub-assembly.
Further important objects of the present invention are to provide a
novel housing assembly of the above character which includes an
integral, inset handle for easy handling of the unit, and which is
disposed and balanced to achieve this, and further which includes
an air hose receiving, annular recess surrounding the handle for
convenient and out of the way storage of the compressor air hose
when the unit is not in use.
Additional objects of the present invention are to provide a novel
housing assembly of the above character which affords easy assembly
of the air compressor sub-assembly, and which is relatively
inexpensive to manufacture, rugged in construction, and reliable in
use.
Other objects and advantages of the present invention will become
more apparent from a consideration of the detailed description to
follow, taken in conjunction with the drawings annexed hereto.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a perspective view illustrating an air compressor housing
assembly embodying the present invention;
FIG. 2 is an enlarged end view of the structure of FIG. 1;
FIG. 3 is a sectional view of FIG. 2, taken along the line 3--3
thereof;
FIG. 4 is an enlarged sectional view of FIG. 1 taken along the line
4--4 thereof;
FIG. 5 is a sectional view of FIG. 3, taken along the line 5--5
thereof;
FIG. 6 is a partially exploded, sectional view of FIG. 3 taken
along the line 6--6 thereof; and
FIG. 7 is a sectional view of FIG. 4 taken along the line 7--7
thereof.
DETAILED DESCRIPTION
Referring now more specifically to the drawings, an air compressor
housing assembly embodying the present invention is illustrated
generally at 11 in FIG. 1 and is seen to include separable upper
and lower members 13, 15. As shown in FIG. 3 an air compressor
sub-assembly 17 is enclosed within the lower housing member 15 and
is electrically powered such as, for example, from a conventional
AC electric power source connected thereto through a line cord 19.
The air compressor, when energized, is constructed to deliver
compressed air through a hose 21 which extends upwardly through a
fitting 22 disposed in an opening in the upper housing member 13.
The hose 21, at its other end, is provided with a suitable fitting
25 for connection to a suitable output device. On/off control for
the air compressor is afforded by a switch 26 having ears 28, 30
trapped between lugs 32, 34 integral with the housing members 13,
15, respectively. The switch 26 includes an externally accessible
rocker type operator 27 for operation thereof. Suitable resilient
feet 29 may be secured to the bottom of the lower housing member 15
to prevent surface marring, to enhance stability of the unit, and
isolate vibration from the surface on which the unit is
supported.
The air compressor sub-assembly 17 illustrated in the drawings,
while not limiting of the invention, is of the linear variety and
includes a cylinder housing 31 having field laminations 33 rigid
therewith. Windings 36 on a spool 38 are mounted on laminations 33
and are suitably connected to line cord 19. The field laminations
33 are supported upon a plurality of ribs 39 formed integral with
the bottom housing member 15. At the top, the laminations 33 are
engaged by a plurality of spaced, sponge rubber pads 41 carried by
ribs 42 integral with the upper housing member 13 when the latter
is in place on the lower housing member 15. As shown, the upper
housing member 13 is fixed to the lower housing member 15 by screws
43, 45, 47.
An armature-piston (not shown) is slidably disposed within the
cylinder housing 31 and is adapted to reciprocate upon energization
of the field laminations 33. When this occurs, air is alternately
drawn in through air inlet openings 35 formed in the lower housing
member 15 and is discharged through a coupling 37 to which the air
hose 21 is connected. Suitable valve means is provided in the
cylinder housing 31 to control inlet and discharge of air thereto.
For a more detailed description of this construction, reference may
be made to the copending application of Martin O. Schrock, et al.,
Ser. No. 333,018, filed Feb. 16, 1973, and owned by the assignee
hereof.
It has been learned that the design and construction of the housing
11 in the area of air inlet openings 35 is most critical from the
standpoint of noise occurring during operation of the unit. Thus, a
rubber, rubber-like, or foam sleeve 49 constructed of, for example,
unsaturated propolymer ethylene propylene rubber, is interposed
between the cylinder housing 31 at the intake valve assembly 51 and
the air inlet openings 35. This sleeve 49 defines an expansion
muffling chamber 53 which requires that the sound generated by the
action of the intake valve 51 pass through this chamber and the
small inlet openings 35 to the outside of the housing 11. This
action serves to break up and greatly reduce the audibility of the
valve noise. Furthermore, the sleeve 49 serves to assist in
isolating vibration of the compressor cylinder 31 from the lower
housing member 15. If desired, a removable filter 57 constructed
of, for example, polyurethane foam or felt, can be disposed within
an annular chamber 59 in the outer surface of the lower housing
member 15 over the inlet openings 35 to filter the incoming
air.
It will be appreciated that the housing members 13, 15, being
formed of a relatively high strength, plastic material having good
electrical insulating properties, such as, for example, Abson 89,
manufactured by B. F. Goodrich, serves to electrically isolate and
insulate the user from the electric air compressor sub-assembly 17.
Furthermore, the compressor sub-assembly 17 is transversely and
longitudinally clamped within the housing 11 by means integral with
the upper and lower housing members 13, 15. This means includes
tapered walls 58, 60 formed integral with ribs 39, and tapered
walls 70, 72 formed integral with ribs 42. The tapered walls 58, 60
and 70, 72 clampingly engage the laminations 33 as shown when the
upper and lower housing members 13, 15 are secured together. The
pads 41, carried by ribs 42 and located between the tapered walls
70, 72 provide additional and resilient clamping forces on the
laminations 33. Thus, when the upper housing member 13 is tightened
on the lower housing member 15 by means of screws 43, 45, 47, the
compressor sub-assembly 17 is securely mounted and supported both
longitudinally and transversely within the housing 11.
At the opposite end of the compressor, there is provided a linear
fan housing 61 provided with openings (not shown) and having a
piston fan 63 therein coupled to the reciprocating armature-piston.
This fan 62 draws cooling air inwardly through slots 64 in the
housing 11 and circulates it over the air compressor sub-assembly
17. As shown, in FIGS. 3 and 6, the fan housing 31 is substantially
cylindrical in shape and is resiliently supported by means of a
band of foam material 63 wrapped therearound and trapped in place
between baffles 66, 68 integral with the upper and lower housing
member 13, 15. Furthermore, this resilient band of material 63
serves as a seal so that cooling air drawn into the housing 11 by
the fan 62 and to the left of the resilient band 63, as seen in
FIG. 3, is caused to continuously recirculate over those parts of
the compressor sub-assembly 17 subject to heating during operation
of the unit.
For ease in handling the unit, the upper housing member 13 is
provided with a handle 65 formed integral therewith. As shown, the
handle 65 is set into a recess 67 in the housing member 13 and
which is annular in configuration. Thus, the handle 65 protrudes
only slightly from the top of the upper housing 13. Furthermore,
the annular recess 67 defines an annular storage chamber for the
compressor hose 21, and the handle 65 forms somewhat of a winding
reel about which the loops of hose 21 may be wrapped, substantially
as shown in FIGS. 1 and 3. Furthermore, the handle 65 is disposed
with respect to the center of gravity of compressor unit so that
the unit is well balanced and easy to handle and transport by the
user. Finally, the particular construction and inset relation of
the handle 65, together with the annular recess 67 provides a
highly inexpensive, and yet neat and aesthetically pleasing
appearance.
To assemble the compressor sub-assembly 17 to the housing, it is
seen that the sub-assembly, with foam band 63 in place, is dropped
into housing member 15 onto ribs 39. After connection of line cord
19, switch 32, and hose 21, housing member 13 is positioned and
secured in place by screws 43, 45, 47.
By the foregoing, there has been disclosed a novel housing
configuration and construction for an electric air compressor or
the like calculated to fulfill the inventive objects hereinabove
recited. While a preferred embodiment has been illustrated and
described above in detail, various additions, substitutions, or
modifications and omissions may be made thereto without departing
from the spirit of the invention.
* * * * *