US2645275A - Fisherman's lounging seat - Google Patents

Fisherman's lounging seat Download PDF

Info

Publication number
US2645275A
US2645275A US223359A US22335951A US2645275A US 2645275 A US2645275 A US 2645275A US 223359 A US223359 A US 223359A US 22335951 A US22335951 A US 22335951A US 2645275 A US2645275 A US 2645275A
Authority
US
United States
Prior art keywords
seat
frame
bottom frame
secured
members
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US223359A
Inventor
George L Wong
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to US223359A priority Critical patent/US2645275A/en
Application granted granted Critical
Publication of US2645275A publication Critical patent/US2645275A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B63SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63BSHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B29/00Accommodation for crew or passengers not otherwise provided for
    • B63B29/02Cabins or other living spaces; Construction or arrangement thereof
    • B63B29/04Furniture peculiar to vessels

Definitions

  • This invention relates to boat seats, and more particularly to an improved lounging seat for use in small boats by fishermen or other persons.
  • a main object of the invention is to provide an improved adjustable lounging seat for use in small boats, said seat being simple in construction, being easy to mount in a boat, and being readily collapsible for transportation and storage.
  • a further object of the invention is to provide an improved adjustable boat. seat whichis inexpensive to manufacture, which is sturdy in construction, which is adjustable to any desired position for the comfort of the user; and which involves only a few parts.
  • Figure l is a side elevational view of an improved adjustable boat seat according to the present invention shown in installed position.
  • Figure 2 is a top plan view of the improved seat of Figure 1 with the canopy portion of the seat removed, said view being taken on line 2--2 of Figure 1.
  • Figure 3 is a side elevational view of the boat seat of Figures 1 and 2 in collapsed position for transportation or storage.
  • Figure 4 is an enlarged fragmentary side elevational view of a portion of .the boat seat of Figures 1 to 3, said view being partly in cross section and showing the adjustable connection between the back rest frame and the bottom frame of the boat seat.
  • Figure 5 is an enlarged cross sectional detail view taken on line 55 of Figure 2.
  • Figure 6 is a side elevational view of a modified form of the improved boat seat of the present invention.
  • Figure 7 is a fragmentary perspective view showing the connection between the tubular element of the connecting strut and the. bottom frame of the boat seat of Figure 6.
  • the boat seat is designated generally at II and comprises a generally rec-' tangular bottom frame I2 of tubular metal or the like which includes a plurality of longitudinal inner frame bars I3 connected to the trans- Secured to the respective longitudinal side elements I4, I4 of the bottom frame I2 are hook-like spring clips I5 of resilient spring metal which are of considerable length and which are adapted to clamp the bottom frame I2 to a transversely extending boat seat I6-in the manner shown in Figure 1.
  • Designated at H is a depending strutbar which is adjustably secured at I8 to a depending lug I9 carried by the rear transverse frame element 20 of bottom frame I2, the connection I8 including a clamping nut 2
  • Designated at 22 is a generally U-shaped back rest frame which is pivotally connected at 23, 23 to the rear portions of the side marginal elements I4, I4 of bottom frame I2. Pivoted to the forward portions of the side members I 4 are the respective tubular members 24, 24.
  • Designated at 25, 25 are respective rod members which are detachably secured at 26, 26 to the side arms of the back rest frame 22; said rod members 25, 25 being telescopically received in the tubular members 24, 24 and being adjustably locked therein by respective latch devices 21 provided at the ends of the tubular members 24.
  • each rod 25 may be formed with uniformly spaced notches or recesses 28 andthe latch device 21 may comprise a pivoted lever 29 to one end of which is secured a dog 30 and the other end of which may comprise a handle 3
  • the lever 29 is rotatably mounted in the body of the latch device and the dog 30 is biased inwardly by a coil spring 32; provided in the latch device and acting on the dog to urge said dog into engagement with the notched rod 25.
  • An additional coil spring 33 is provided in the opposite portion of the latch device body, said spring 33 acting outwardly on the lever 29 to bias handle 3
  • eachof the sleeve members 24 Secured on eachof the sleeve members 24 is an arm rest 34 whose main portion is disposed at an acute angle to the associated tubular element 24, as shown in Figure 1.
  • the main portion of the arm rest 34 is rigidly secured to the tubular member 24 by a curved connecting bar 35.
  • the bottom frame 12 is engaged on a boat seat l6 and clamped thereon by the spring icli-ps -l ""i'n the manner shown in Figure 1.
  • the backrest frame 22 is secured in a desired position of adjustment by means of the latch devices 21, whereby the rod members 25 .may be locked in the tubular members 24 in deksired positions of extension with respectto said tubular members, and whereby the backrest frame 22 may be secured in any desired angular position relative to the bottomfr'a'me I2.
  • canopy 38 may then be mounted on the back rest cured to the transverse boat seat [6 by the spring clamps l5 and the rear portion of the bottom frame [2 is supported on the boat floor by the depending rear strut H which is locked inthe position shown in Figure 1 by means of the clamping nut 2
  • each sleeve member 24 contains a coil spring4 2 "having one end thereof secured to the insideof the sleeve member at 43 and having the other end thereof connected to the end of the associated rod member 25 at "44.
  • the springs 42 bias the rod members 25 inwardly into retracted posi'tionsinside the sleeve members 24.
  • the bottom frame I2 is provided with 'a strap 45 of leather or other suitable flexible material which is connected at one end to one of the side elements of frame i2 and which is engageable at its other end with a conventional buckle, not shown, conneoted to the other side element of the bottomfraine l2.
  • the folded seat may there- 'forebe securedinthe manner shown in Figure 3 by means the strap 45.
  • the side arms of the bottom retainer: and the back rest frame '22 are connectedbyai c uately curved telescopic strut member's instead or by the straight telescopic strut membersof the form of the invention shown in Figures '1"t o".5;l secured tolthe side arms of the bottom frame I2 are the respective arcuately curved sleeve members 24, and detachablyv secured to the respective side arms of the back rest frame '22 are the respective arcuate rod members 25' which are telescopically received in the sleeve members 24, said sleeve members being provided at their ends with latch devices 21 adapted to releasably lock the rod members 25' in adjusted positions in the arcuate sleeve members 24?
  • each rod member 25 is urged inwardly into its associated sleeve 7 member 24' by a coil spring, not shown, connected understood that the axis of curvature of the ar-' cuate sleeve members 24 and rod members 25 extends through-the pivotal connections 23 of the backrest frame 22 to the bottom frame l2 in order to allow telescopic adjustment of the arcuate rod members 25 in the-sleeve members 24.
  • the lower ends of the arcuate sleevemembers'fl' are provided with lugs 45 which are connected to upstanding lugs 46 on the side arms of bottom frame l2 by bolts 41 and wing nu'ts'48, whereby the tubular members 24 may be releasably clamped in the positions thereof shown in Figures 6 and '7, and may be released for downward rotation toward bottom frame l2 when the seat is to be folded up'for transportation or storage. 7 a
  • a boat seat'of the character described comprising a bottom frame, a resilient, hook-like spring cla'mp secured to the "under side of said bottom frame and being arranged to resiliently clamp said frame to a transverse boat seat, a back rest frame 'pivotally secured to the rear side marginal portions of said bottom frame, respective telescopic strut bars connecting the sides of the back rest frame to the respective forward side marginal portions of said bottom frame, an arm rest secured on each strut ba'r, an angularly adjustable depending 'strut'bar se-' cured to the rear portion of the bottom frame, and means for retaining the bar in its 'angularly adjusted position, whereby said strut bar may be adjusted to engage a floor'beneath said transverse boat seat.
  • a boat seat of'the character described comprising a bottom frame, a resilient hook-like spring clamp secured to the under side of said bottom frame and being arranged to resiliently clamp said frame to a transverse boat seat, a back rest frame pivotally secured to the rear side marginal portions of said bottom frame, respective arcuately curved tubular members pivotally secured.

Description

July 14, 1953 e. L. WONG 2,645,275
FISHERMAN S LOUNGING SEAT Filed April 27, 1951 2 Sheets-Sheet l lze I 39 1 INVENTOR 27 Jay- 45 GEORGE l. [Ma/v6 wwzmfim 0mm ATTORNEY July 14, 1953 I I G. L. WONG FISI-JERMANS LOUNGING SEAT Filed April 27 Q 1951 2 Sheets-Sheet 2 INVENTOR @505 G5 1. WONG mad/idem ATTORNEYS verse ends of bottom frame I2.
Patented July 14, 1953 V UNITED STATES PATENT OFFICE FISHERMANS LOUNGING SEAT George L. Wong, Oakland, Calif. Application April 2'1, 1951, Serial No. 223,359
3 Claims. (01. 155-133) v 1 This invention relates to boat seats, and more particularly to an improved lounging seat for use in small boats by fishermen or other persons.
A main object of the invention is to provide an improved adjustable lounging seat for use in small boats, said seat being simple in construction, being easy to mount in a boat, and being readily collapsible for transportation and storage.
A further object of the invention is to provide an improved adjustable boat. seat whichis inexpensive to manufacture, which is sturdy in construction, which is adjustable to any desired position for the comfort of the user; and which involves only a few parts.
Further objects and advantages of the invention will become apparent from the following description and claims, and from the accompanying drawings, wherein:
Figure l is a side elevational view of an improved adjustable boat seat according to the present invention shown in installed position.
Figure 2 is a top plan view of the improved seat of Figure 1 with the canopy portion of the seat removed, said view being taken on line 2--2 of Figure 1.
Figure 3 is a side elevational view of the boat seat of Figures 1 and 2 in collapsed position for transportation or storage.
Figure 4 is an enlarged fragmentary side elevational view of a portion of .the boat seat of Figures 1 to 3, said view being partly in cross section and showing the adjustable connection between the back rest frame and the bottom frame of the boat seat.
Figure 5 is an enlarged cross sectional detail view taken on line 55 of Figure 2.
Figure 6 is a side elevational view of a modified form of the improved boat seat of the present invention. v
Figure 7 is a fragmentary perspective view showing the connection between the tubular element of the connecting strut and the. bottom frame of the boat seat of Figure 6.
Referring to the drawings, and more particularly to Figures 1 to 5, the boat seat is designated generally at II and comprises a generally rec-' tangular bottom frame I2 of tubular metal or the like which includes a plurality of longitudinal inner frame bars I3 connected to the trans- Secured to the respective longitudinal side elements I4, I4 of the bottom frame I2 are hook-like spring clips I5 of resilient spring metal which are of considerable length and which are adapted to clamp the bottom frame I2 to a transversely extending boat seat I6-in the manner shown in Figure 1. Designated at H is a depending strutbar which is adjustably secured at I8 to a depending lug I9 carried by the rear transverse frame element 20 of bottom frame I2, the connection I8 including a clamping nut 2| for clamping the strut H in an adjusted depending position, as shown in Figure 1, whereby said strut supports the rear-portion of bottom frame I2.
Designated at 22 is a generally U-shaped back rest frame which is pivotally connected at 23, 23 to the rear portions of the side marginal elements I4, I4 of bottom frame I2. Pivoted to the forward portions of the side members I 4 are the respective tubular members 24, 24. Designated at 25, 25 are respective rod members which are detachably secured at 26, 26 to the side arms of the back rest frame 22; said rod members 25, 25 being telescopically received in the tubular members 24, 24 and being adjustably locked therein by respective latch devices 21 provided at the ends of the tubular members 24. As shown in Figure 5, each rod 25 may be formed with uniformly spaced notches or recesses 28 andthe latch device 21 may comprise a pivoted lever 29 to one end of which is secured a dog 30 and the other end of which may comprise a handle 3| extending outside the body of the latch device 21. As shown in Figure 5, the lever 29 is rotatably mounted in the body of the latch device and the dog 30 is biased inwardly by a coil spring 32; provided in the latch device and acting on the dog to urge said dog into engagement with the notched rod 25. An additional coil spring 33 is provided in the opposite portion of the latch device body, said spring 33 acting outwardly on the lever 29 to bias handle 3| outwardly, as shown. Normally the dog 30 is biased into locking engagement with one of the notches 28, whereby the rod 25 is locked with respect to the tubular members 24. To unlock the rod it is merely necessary to press inwardly on the handle 3|, whereby the dog 30 is retracted from engagement with rod 25, allowing said rod to be moved inwardly or outwardly with respect to the tubular members 24.
Secured on eachof the sleeve members 24 is an arm rest 34 whose main portion is disposed at an acute angle to the associated tubular element 24, as shown in Figure 1. The main portion of the arm rest 34 is rigidly secured to the tubular member 24 by a curved connecting bar 35.
Secured to the upperportions of theside arms of the back rest frame 22 are the respective tubuends of supporting rods 31 connected to a canopy 38 which is arranged to overlie the bottom frame l2 of the boat seat, as shown in Figure 1. Secured to the side arms of'the back rest frame 22 is the flexible, transversely extending strap member 39.
In using the device, the bottom frame 12 is engaged on a boat seat l6 and clamped thereon by the spring icli-ps -l ""i'n the manner shown in Figure 1. The backrest frame 22 is secured in a desired position of adjustment by means of the latch devices 21, whereby the rod members 25 .may be locked in the tubular members 24 in deksired positions of extension with respectto said tubular members, and whereby the backrest frame 22 may be secured in any desired angular position relative to the bottomfr'a'me I2. The
canopy 38 may then be mounted on the back rest cured to the transverse boat seat [6 by the spring clamps l5 and the rear portion of the bottom frame [2 is supported on the boat floor by the depending rear strut H which is locked inthe position shown in Figure 1 by means of the clamping nut 2|.
When useof the device is not required, it may be folded .to the'position shown in Figure 3 by disconnecting the rodmembers 25 from the side arms of back rest frame 22, removing the canopy 38 from the back rest frame, and folding said back rest frame to a position overlying the bottom frame l2, as shown'in Figure 3. The rod elements 25 may be locked in retracted positions inside the sleeve members 24. As shown in Figure 4, each sleeve member 24 contains a coil spring4 2 "having one end thereof secured to the insideof the sleeve member at 43 and having the other end thereof connected to the end of the associated rod member 25 at "44. The springs 42 bias the rod members 25 inwardly into retracted posi'tionsinside the sleeve members 24. When the handles 3| of the latch devices "21 arepressed inwardly the springs 42 retract said rod membersintofthe sleeves 24 to the positions thereof ,Show'nim Figure 4. The springs 42 are tensionw'hentheback rest frame 22 is locked in a rearwardly rotated position, as shown in Figure 1. Therefore, when the rod members 25 are disconnected from the side arms of the back rest frame 22, the rod members 25 may be retracted inside the tubular members 24 merely by pressing inwardly on the handles 3i of latch devices 21.. h l
The bottom frame I2 is provided with 'a strap 45 of leather or other suitable flexible material which is connected at one end to one of the side elements of frame i2 and which is engageable at its other end with a conventional buckle, not shown, conneoted to the other side element of the bottomfraine l2. The folded seat may there- 'forebe securedinthe manner shown in Figure 3 by means the strap 45. Referring now' to the form of the invention shown in'Figu-res 6 and 7, the side arms of the bottom retainer: and the back rest frame '22 are connectedbyai c uately curved telescopic strut member's instead or by the straight telescopic strut membersof the form of the invention shown in Figures '1"t o".5;l secured tolthe side arms of the bottom frame I2 are the respective arcuately curved sleeve members 24, and detachablyv secured to the respective side arms of the back rest frame '22 are the respective arcuate rod members 25' which are telescopically received in the sleeve members 24, said sleeve members being provided at their ends with latch devices 21 adapted to releasably lock the rod members 25' in adjusted positions in the arcuate sleeve members 24? as in the;previously described embodiment of the invention, each rod member 25 is urged inwardly into its associated sleeve 7 member 24' by a coil spring, not shown, connected understood that the axis of curvature of the ar-' cuate sleeve members 24 and rod members 25 extends through-the pivotal connections 23 of the backrest frame 22 to the bottom frame l2 in order to allow telescopic adjustment of the arcuate rod members 25 in the-sleeve members 24. As shown in Figure the lower ends of the arcuate sleevemembers'fl' are provided with lugs 45 which are connected to upstanding lugs 46 on the side arms of bottom frame l2 by bolts 41 and wing nu'ts'48, whereby the tubular members 24 may be releasably clamped in the positions thereof shown in Figures 6 and '7, and may be released for downward rotation toward bottom frame l2 when the seat is to be folded up'for transportation or storage. 7 a
While specific embodiments of improved boat seats have been disclosed in the foregoing de' scription, it will be understood that various modifications within the spirit of the invention may occur to those skilled in the art. Therefore, it
7 is intended that no limitations be placed on the invention except as defined by the scope of the appended claims.
What is claimed is:
1. A boat seat'of the character described comprising a bottom frame, a resilient, hook-like spring cla'mp secured to the "under side of said bottom frame and being arranged to resiliently clamp said frame to a transverse boat seat, a back rest frame 'pivotally secured to the rear side marginal portions of said bottom frame, respective telescopic strut bars connecting the sides of the back rest frame to the respective forward side marginal portions of said bottom frame, an arm rest secured on each strut ba'r, an angularly adjustable depending 'strut'bar se-' cured to the rear portion of the bottom frame, and means for retaining the bar in its 'angularly adjusted position, whereby said strut bar may be adjusted to engage a floor'beneath said transverse boat seat.
2.-A boats'eat of the character described'comprising a bottom frame, a resilient, hook-like spring clamp secured to the under side of said bottom frame and being arranged to resiliently clamp said frame to a transverse boat seat, a
5, adjustable depending strut bar secured to the rear portion of the bottom frame;
3. A boat seat of'the character described comprising a bottom frame, a resilient hook-like spring clamp secured to the under side of said bottom frame and being arranged to resiliently clamp said frame to a transverse boat seat, a back rest frame pivotally secured to the rear side marginal portions of said bottom frame, respective arcuately curved tubular members pivotally secured. to the forward side marginal portions of the bottom frame, respective arcuately curved rod members pivotally secured to the sides of the back rest frame and telescopically received in the respective tubular members, releasable locking means carried by the tubular members and lockingly engaging the rod members, an arm rest secured on each tubular member, an angularly adjustable depending strut bar secured to the rear portion of the bottom frame, and means for retaining said strut bar Number Name Date 123,757 Quirolo Apr. 16, 1872 433,836 Van Slyke Aug. 5, 1890 521,127 Putt June 5, 1894 564,253 McCaflfrey July 21, 1896 1,451,655 Gilley Apr. 10, 1923 2,449,523 Wilson Sept. 14, 1948 2,490,367 Maddocks Dec. 6, 1949 2,528,433
Hines Oct. 31, 1950
US223359A 1951-04-27 1951-04-27 Fisherman's lounging seat Expired - Lifetime US2645275A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US223359A US2645275A (en) 1951-04-27 1951-04-27 Fisherman's lounging seat

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US223359A US2645275A (en) 1951-04-27 1951-04-27 Fisherman's lounging seat

Publications (1)

Publication Number Publication Date
US2645275A true US2645275A (en) 1953-07-14

Family

ID=22836180

Family Applications (1)

Application Number Title Priority Date Filing Date
US223359A Expired - Lifetime US2645275A (en) 1951-04-27 1951-04-27 Fisherman's lounging seat

Country Status (1)

Country Link
US (1) US2645275A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2708962A (en) * 1953-02-10 1955-05-24 Rexart Metal Ind Inc Folding beach chair
US2725925A (en) * 1954-07-23 1955-12-06 Jerry R Sanderson Folding seat devices
US2732888A (en) * 1956-01-31 Locking mechanism for reclining seats
US3272555A (en) * 1964-11-12 1966-09-13 American Seating Co Adjustable back lounge chair
US5580129A (en) * 1995-04-13 1996-12-03 Findlay; Robert Portable folding chair
GB2401539A (en) * 2003-05-10 2004-11-17 Hopkins & Holloway Ltd Portable seat for a boat
US20090236886A1 (en) * 2008-03-17 2009-09-24 Chuen-Jong Tseng Swing assembly
US7931336B2 (en) 2005-03-29 2011-04-26 Cushion Seats, Inc. Stadium seat

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US123757A (en) * 1872-02-13 Improvement in the manufacture of paper-pulp
US433836A (en) * 1890-08-05 van slyke
US521127A (en) * 1894-06-05 Half to w
US564253A (en) * 1896-07-21 Photo-litho
US1451655A (en) * 1922-06-13 1923-04-10 Sullivan E Gilley Auxiliary seat for automobiles
US2449523A (en) * 1947-02-12 1948-09-14 George P Wilson Stadium folding chair
US2490367A (en) * 1944-04-08 1949-12-06 Maddocks William Michael Folding chair
US2528433A (en) * 1946-01-12 1950-10-31 W B Hines Res And Dev Corp Portable folding seat

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US123757A (en) * 1872-02-13 Improvement in the manufacture of paper-pulp
US433836A (en) * 1890-08-05 van slyke
US521127A (en) * 1894-06-05 Half to w
US564253A (en) * 1896-07-21 Photo-litho
US1451655A (en) * 1922-06-13 1923-04-10 Sullivan E Gilley Auxiliary seat for automobiles
US2490367A (en) * 1944-04-08 1949-12-06 Maddocks William Michael Folding chair
US2528433A (en) * 1946-01-12 1950-10-31 W B Hines Res And Dev Corp Portable folding seat
US2449523A (en) * 1947-02-12 1948-09-14 George P Wilson Stadium folding chair

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2732888A (en) * 1956-01-31 Locking mechanism for reclining seats
US2708962A (en) * 1953-02-10 1955-05-24 Rexart Metal Ind Inc Folding beach chair
US2725925A (en) * 1954-07-23 1955-12-06 Jerry R Sanderson Folding seat devices
US3272555A (en) * 1964-11-12 1966-09-13 American Seating Co Adjustable back lounge chair
US5580129A (en) * 1995-04-13 1996-12-03 Findlay; Robert Portable folding chair
US5611594A (en) * 1995-04-13 1997-03-18 Findlay; Robert Portable folding chair
GB2401539A (en) * 2003-05-10 2004-11-17 Hopkins & Holloway Ltd Portable seat for a boat
US7931336B2 (en) 2005-03-29 2011-04-26 Cushion Seats, Inc. Stadium seat
US20090236886A1 (en) * 2008-03-17 2009-09-24 Chuen-Jong Tseng Swing assembly

Similar Documents

Publication Publication Date Title
US4097087A (en) Chair with adjustable back support cushion
US7240961B2 (en) Portable sling chair
US11034414B1 (en) Convertible leaning post seating system for marine vessels
US2645275A (en) Fisherman's lounging seat
US2710643A (en) Table supported child's seat
US5332283A (en) Three legged folding chair
AU621345B2 (en) An infant safety chair
US1865030A (en) Back rest
US1422319A (en) Folding camp chair
US3125766A (en) Splint-stretcher
US3623766A (en) Portable fishing chair
US2671231A (en) Canoe yoke
US2985228A (en) Chair constructions
US1869186A (en) Float
US1493467A (en) Folding chair for camping or boating
US2483552A (en) Sportsman's swivel seat
US4672911A (en) Canoe seat and oar lock unit
US2959796A (en) Sportsman's accessory
US2505702A (en) Combined folding chair and rest
US6357824B1 (en) Beach/field recliner
US6267635B1 (en) Flotation device
US2738169A (en) Back rest
US1797911A (en) Chair
US2904102A (en) Seat attachment for a chair
US433649A (en) Combined child s chair and chair