This disclosure relates generally to sealing members and, more specifically, to sealing members for weather barriers.
Dock weather barriers, such as dock seals and dock shelters, prevent the ingress of outdoor environmental conditions or contaminants (e.g., rain, snow, wind, hot/cold temperatures, insects, animals, etc.) into the interior of a building and cargo area of a vehicle during the loading and/or unloading of the vehicle. Dock shelters and seals also prevent the egress of conditioned air from within a building and/or a vehicle cargo area to the outdoor environment.
Some example dock seals use side members having a compressible foam core or body surrounded by a coated fabric or vinyl outer layer. The foam core provides sufficient structural rigidity to enable the side members to be extended a short distance from the building wall surrounding the loading dock. The coated fabric outer layer protects the foam core from outdoor environmental conditions (e.g., moisture), provides wear resistance to repeated impacts from the rear portions of vehicles, and/or may provide desirable aesthetic qualities. Additionally, a header structure may span between the side members along a top portion of the loading dock opening. The header structure may be another compressible member similar in construction to the side members and, in some cases, may include a weighted fabric curtain that hangs downwardly to contact the top of a truck trailer to form an environmental barrier along the top of the trailer.
Another type of dock seal may use inflatable side members and a header structure having internal compressible resilient pads, which provide some degree of side member compressibility when the side members are in a deflated condition. In either case, when the rear portion of a vehicle (e.g., a truck trailer) is backed into either foam or inflatable dock seal side and header members, the side and header members are compressed toward the building wall to form a seal along the lateral and top back edges of the vehicle. If present, the head curtain sweeps along the top of the trailer to form a seal at the top of the trailer between the side members. Dock seals typically consume a relatively small amount of wall space and can provide a relatively high quality seal between the rear edges of a vehicle and the outside building wall surrounding the dock. However, when the dock seal side members are compressed, they may be displaced into or otherwise encroach on the opening to the rear of the docked vehicle. As a result, the compressed side member may interfere with operation of a fork lift and/or an operator during loading and unloading activities. In addition, inflatable dock seals may be susceptible to power losses and/or may tear and compromise the ability of the side members to inflate to provide an acceptable seal.
In contrast to dock seals, some example dock shelters use side members that are mounted to the outside building wall surrounding the loading dock. The side members are spaced well to the outside of the sides of a docked vehicle. The side members are configured to extend (i.e., to be cantilevered) an appreciable distance from the outside building wall, particularly in cases where a dock leveler protrudes from the dock opening. The side members may also support flexible seal members or side curtains extending inwardly from the side members across at least a portion of the opening defined by the side members. When a vehicle such as, for example, a truck trailer, is backed into the opening of the dock shelter, the inwardly facing edges of the seal members or side curtains resiliently deflect and sweep against the lateral sides of the trailer to form an environmental barrier therebetween. As with dock seals, dock shelters also typically include a header structure, which may include a head curtain, to form an environmental barrier along the top edge of the rear of the vehicle.
In contrast to dock seals, dock shelters typically provide unobstructed access to a vehicle cargo area opening (i.e., there are no foam pads or the like to be compressed and displaced into the opening). However, most known dock shelter side members are constructed using rigid wood, fiberglass or metal frames capable of supporting the significant weight of the seal members or side curtains, which are usually held at an appreciable distance (e.g., several feet) from the building wall. Such side members may be permanently deformed if they are impacted by a vehicle. Accordingly, bumpers or stops may be mounted to the lower edge of the dock shelter to prevent a vehicle (e.g., a truck trailer) from impacting and damaging the rigid shelter.
The rigid side members used to implement these dock shelters are also typically mechanically coupled via the header and/or another rigid member to provide increased lateral rigidity to the dock shelter to minimize the ability of the side members to move from side-to-side. Because of this, the side members typically have to be mounted relatively far apart to accommodate a wide range of possible off-center vehicle positions. This relatively large distance between the rigid side members consumes a significant and, thus, expensive amount of building wall space for each loading dock opening.
Some example dock shelters having impactable side members. The impactable side members are similar to those used with dock seals and typically use a foam core or body surrounded by a coated fabric outer layer. Seal members or side curtains, which may be constructed using a fabric and flexible fiberglass stays combination or a foam core and fabric combination, are typically mounted to the side members to extend at least partially across the shelter opening. When a vehicle is backed into the shelter, the inwardly facing edges of the seal members or side curtains deflect and sweep against the sides of the vehicle to form an environmental barrier or seal against the sides of the vehicle. In the event the off-center position of a vehicle results in the rear of the vehicle impacting a side member, the foam core or body of the side member is resiliently compressed. When the vehicle is pulled away from an impacted side member, the foam core of the side member causes the side member to substantially recover to its original condition or shape.
Example lateral sealing members for use at vehicle loading docks are disclosed herein. An example sealing member disclosed herein may be employed to implement a header (e.g., positioned generally horizontally relative to a doorway) and/or a side seal (e.g., positioned generally vertically relative to a doorway). The example lateral sealing members disclosed herein include tip seals to enhance sealing between the lateral sealing members and a surface of a vehicle to be engaged by the tip seal and/or the lateral sealing members. For example, the lateral sealing members disclosed herein may include a deformable or flexible seal positioned adjacent an end of the lateral sealing member that is to engage a vehicle when the vehicle is parked at a loading dock at which the lateral sealing member is installed. In some examples, the example tip seals of the lateral sealing members disclosed herein increase a contact surface area to enhance sealing capabilities of the lateral sealing members. The tip seals disclosed herein may include a hollow chamber, a deformable air chamber, deformable brush bristles, a pivotal seal, a deformable foam, and/or any other seal. An example lateral sealing member disclosed herein may include a J-shaped cross-section or profile to provide a vertical channel that extends into a pathway of a vehicle to catch or engage a rear vertical edge of the vehicle as the vehicle engages the lateral sealing member. The example channel may cover a hinge gap between a hinged door panel of the vehicle and/or the rear edge of the vehicle. In some examples, the channel may include a tip seal to enhance or increase a sealing contact with the vehicle. In addition or alternatively, some examples lateral sealing members disclosed herein include a channel seal at a point of transition between the channel and a flatter section (e.g., an end attached to a side structure (e.g., an attached end) or a portion not forming the channel) of the lateral sealing member.
The header 24 is schematically illustrated to represent means for sealing against a roof 28 of the vehicle 22. Examples of the header 24 include, but are not limited to, a weighted curtain, a deflectable panel, a compressible pad, etc.
Each side member 26 includes an example of a lateral sealing member 30 (e.g., lateral sealing members 30a-m) attached to a side support member 32, which in turn is mounted to the wall 16 or to some other structure of the building 14. The side support member 32 is schematically illustrated to represent any structural means for supporting the lateral sealing member 30. Examples of the side support member 4 include, but are not limited to, a resiliently compressible foam block, a rigid panel, a semi-rigid panel, and/or various combinations thereof. In reaction to the vehicle 22 backing into the dock 12, the lateral sealing members 30 resiliently deflect rearward 34 and outward 36 to seal against rear vertical edges 38 and/or adjacent surfaces (e.g., a side surface) of the vehicle 22.
For spatial reference, the vehicle's travel path into dock 12 defines a vehicle pathway 40 leading to the doorway 18. The doorway 18 has a doorway height 42 extending in a generally vertical direction and a doorway width 44 extending in a generally lateral horizontal direction. The doorway height 42 and the doorway width 44 lie along and define a plane 46 and a line 48 perpendicular to the plane 46. The wall 16 has an exterior surface 50 facing in a forward direction 52 parallel to the line 48. The wall 16 defines the cargo passageway 20 passing through the doorway 18, where the passageway's height and width corresponds to the doorway's height 42 and width 44, respectively. The vehicle 22 is movable between a parked position (
In the example shown in
The channel 58 defines a vertically elongate groove 66 that is sized to receive the rear vertical edge 38 of the vehicle 22. In some examples, the rear edge 38 is an area where a door hinge 68 of the vehicle 22 pivotally couples a rear door panel 70 of the vehicle 12 to a sidewall 72 of the vehicle 22. In some examples, the sidewall 72 includes a rear flange 76 or doorframe surrounding a rear door opening 74 of the vehicle 22. In the illustrated examples, the channel 58 bridges a hinge gap 78 between the door panel 70 and the sidewall 72. To enhance and/or increase a sealing contact or area between the lateral sealing member 30a and the vehicle 22, the lateral sealing member 30a includes a tip seal 80 proximate the tip 60. The tip seal 80 of the illustrated example is resiliently compliant (e.g., flexible and/or compressible) and extends into the groove 66.
In the example shown in
In this example, the tip seal 80 includes a bowed strip of material 86 having vertical edges 88 sewn, bonded and/or otherwise attached to the covering 84a and/or to the core 82. The strip 86 is bowed to provide or create an air chamber 90 between the strip 86 and the covering 84a. In the illustrated example, the seal 80 is hollow. The air chamber 90 provides the tip seal 80 with resilient compressibility to sealing conform (as shown in
In another example, shown in
In the example shown in
In the example shown in
In addition or alternatively to the tip seal 108, a lateral sealing member 30e includes a channel seal 116 to seal against an inner surface 118 of the rear door panel 70. The channel seal 116 can be used along with any other tip seal disclosed herein and/or used on a lateral sealing member 30 without a tip seal. In the example illustrated in
To provide bidirectional sealing, in the example shown in
Any of the hollow seals (e.g., 90, 98, 106, 124) disclosed herein can be filled with resiliently compressible foam to increase a sealing force against the vehicle 22.
In the example shown in
A brush seal with bristles 150 (e.g., bristles 150a-f) can be used as an alternative to any of the tip seals shown in
In addition or alternatively, an example lateral sealing member 30j includes a plurality of bristles 150b attached to the tip panel 154, as shown in
In addition or alternatively, an example lateral sealing member 30k includes a plurality of bristles 150c attached to the tip panel 154 and a second plurality of bristles 150d attached to the side panel 56, as shown in
In addition or alternatively, an example lateral sealing member 301 includes a plurality of bristles 150e attached to an interface 162 (e.g., an inside corner) of the rear panel 152 and the tip panel 154, and/or a plurality of bristles 150f attached to an interface 164 of the rear panel 152 and the side panel 56, as shown in
Referring again to
For further clarification, arrow 146 of
At least some of the aforementioned examples include one or more features and/or benefits including, but not limited to, the following:
In some examples,
Although certain example methods, apparatus and articles of manufacture have been described herein, the scope of the coverage of this patent is not limited thereto. On the contrary, this patent covers all methods, apparatus and articles of manufacture fairly falling within the scope of the appended claims either literally or under the doctrine of equivalents.
Number | Name | Date | Kind |
---|---|---|---|
3322132 | Rieder | May 1967 | A |
3403489 | Frommelt | Oct 1968 | A |
3500599 | Sciolino | Mar 1970 | A |
3638667 | Frommelt | Feb 1972 | A |
3792559 | Frommelt | Feb 1974 | A |
3854257 | Lobel | Dec 1974 | A |
RE28391 | Frommelt et al. | Apr 1975 | E |
3875954 | Frommelt | Apr 1975 | A |
3915183 | Frommelt | Oct 1975 | A |
3934380 | Frommelt et al. | Jan 1976 | A |
4062157 | Potthoff | Dec 1977 | A |
4213279 | Layne | Jul 1980 | A |
4328273 | Yackiw | May 1982 | A |
4349992 | Layne | Sep 1982 | A |
4365452 | Fillman | Dec 1982 | A |
4381631 | Frommelt | May 1983 | A |
4554768 | Srajer | Nov 1985 | A |
4574543 | Crosson | Mar 1986 | A |
4601142 | Frommelt | Jul 1986 | A |
4638612 | Bennett | Jan 1987 | A |
4679364 | Fettig et al. | Jul 1987 | A |
4711059 | Layne | Dec 1987 | A |
4718207 | Frommelt | Jan 1988 | A |
4724648 | Diepholder | Feb 1988 | A |
4799341 | Frommelt et al. | Jan 1989 | A |
4799342 | Klevnjans | Jan 1989 | A |
4805362 | Frommelt | Feb 1989 | A |
4825607 | Frommelt | May 1989 | A |
4873800 | Frommelt | Oct 1989 | A |
4873801 | Winters | Oct 1989 | A |
5007211 | Ouellet | Apr 1991 | A |
5125196 | Moody | Jun 1992 | A |
5174075 | Alten | Dec 1992 | A |
5174084 | Alten | Dec 1992 | A |
5185977 | Brockman | Feb 1993 | A |
5195285 | Alten | Mar 1993 | A |
5282342 | Brockman | Feb 1994 | A |
5341613 | Brockman | Aug 1994 | A |
5394662 | Giuliani | Mar 1995 | A |
5553424 | Brockman | Sep 1996 | A |
5622016 | Frommelt | Apr 1997 | A |
5775044 | Styba | Jul 1998 | A |
5953868 | Giuliani | Sep 1999 | A |
6205721 | Ashelin | Mar 2001 | B1 |
6233885 | Hoffmann | May 2001 | B1 |
6425214 | Boffeli | Jul 2002 | B1 |
6854224 | Thill | Feb 2005 | B2 |
7185463 | Borgerding | Mar 2007 | B2 |
8307588 | Hoffmann | Nov 2012 | B2 |
8458960 | Digmann | Jun 2013 | B2 |
8887447 | Hoffmann et al. | Nov 2014 | B2 |
20040261335 | Eungard | Dec 2004 | A1 |
20060026912 | Eungard | Feb 2006 | A1 |
20060032159 | Eungard | Feb 2006 | A1 |
20060090407 | Hoffmann | May 2006 | A1 |
20060272222 | Hoffmann | Dec 2006 | A1 |
20070283636 | Bernacki | Dec 2007 | A1 |
20120255685 | Kniese | Oct 2012 | A1 |
20130221624 | Digmann et al. | Aug 2013 | A1 |
20150007511 | Digmann et al. | Jan 2015 | A1 |
20150007512 | Digmann | Jan 2015 | A1 |
20150376892 | Digmann et al. | Dec 2015 | A1 |
Number | Date | Country |
---|---|---|
2013036634 | Mar 2013 | WO |
WO 2013036634 | Mar 2013 | WO |
Entry |
---|
International Searching Authority, “International Search Report and Written Opinion,” issued in connection with application No. PCT/US2016/048186 on Nov. 16, 2016, (15 pages). |