Patent US4802786A successfully refreshed from Google Patents.
US4802786A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Joist hanger
Assignee: Mitek Industries Inc
•
Filing: 1987-11-03
•
Granted: 1989-02-07
•
Expires: 2007-11-03
Abstract
Abstract A joist hanger of the type comprising an upright back, parallel opposing sides forming a channel and a horizontal bottom extending forwardly from the back forming a seat for a joist, the hanger having at least one pair of opposing tabs extending inwardly from the sides of the hanger into the channel, the tabs presenting downwardly, rearwardly sloping surfaces to a joist forced against the tabs to urge the joist against the back of the hanger. The innermost edges of the tabs being knife-like for penetrating a joist forced against the tabs. The tabs are preferably formed by a portion of the side folded inwardly along a downwardly, rearwardly sloping fold line.
Inventors
- 👤 James G. Yauger
- 👤 John M. Rushton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:11
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/18; E04B1/26; E04B1/2604; E04B1/2612; F; F16; F16B; F16B9/00; F16B9/05; F16B2200/00; F16B2200/50; F16B2200/503; Y; Y10; Y10T; Y10T403/00; Y10T403/49; Y10T403/4974
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
77 words
An improved joist hanger of the type comprising an upright back, parallel opposing sides forming a channel and a horizontal bottom extending forwardly from the back forming a seat for a joist, the improvement comprising: at least one pair of opposing tabs extending inwardly from the sides of the hanger into the channel, the tabs presenting downwardly, rearwardly sloping surfaces to a joist forced against the tabs to urge the joist against the back of the hanger.
Claim 2
Dependent Claim
77 words
An improved joist hanger of the type comprising an upright back, parallel opposing sides forming a channel and a horizontal bottom extending forwardly from the back forming a seat for a joist, the improvement comprising: at least one pair of opposing tabs extending inwardly from the sides of the hanger into the channel, the tabs presenting downwardly, rearwardly sloping surfaces to a joist forced against the tabs to urge the joist against the back of the hanger.
Claim 3
Dependent Claim
25 words
The improved joist hanger according to claim 1 wherein the innermost edge of each tab is knife-like for penetrating a joist forced against the tabs.
Claim 4
Dependent Claim
28 words
The improved joist hanger according to claim 1 wherein each tab is formed by a portion of the side folded inwardly along a downwardly, rearwardly sloping fold line.
Claim 5
Dependent Claim
38 words
The improved joist hanger according to claim 3 wherein the fold line extends from the base of a slit in the sidewall to a point on the front edge of the side above the base of the slit.
Claim 6
Dependent Claim
20 words
The improved joist hanger according to claim 4 wherein the slit extends substantially parallel to the bottom of the hanger.
Claim 7
Dependent Claim
39 words
The improved joist hanger according to claim 4 wherein the slit slopes generally upwardly and rearwardly in the side, defining a generally triangular tab having an acute angle at the apex of the tab which extends into the channel.
Claim 8
Dependent Claim
22 words
The improved joist hanger according to claim 1 wherein there are two pairs of opposing tabs, one pair spaced above the other.
Claim 9
Dependent Claim
30 words
The improved joist hanger according to claim 1 further comprising a horizontal top flange extending rearwardly from the back of the hanger and adapted for engagement with a carrying member.
Claim 10
Dependent Claim
111 words
An improved joist hanger of the type comprising an upright back, parallel opposing sides forming a channel for receiving a joist and a horizontal bottom extending forwardly from the back forming a seat for the joist, the improvement comprising: at least one pair of opposing tabs extending inwardly from the sides of the hanger into the channel, each tab formed by a portion of the side folded inwardly along a downwardly, rearwardly sloping fold line and presenting an inwardly sloping knife-like edge for penetrating a joist forced against the tabs, the tabs forming downwardly, rearwardly sloping surfaces for urging a joist forced against the tabs against the back of the hanger.
Claim 11
Dependent Claim
111 words
An improved joist hanger of the type comprising an upright back, parallel opposing sides forming a channel for receiving a joist and a horizontal bottom extending forwardly from the back forming a seat for the joist, the improvement comprising: at least one pair of opposing tabs extending inwardly from the sides of the hanger into the channel, each tab formed by a portion of the side folded inwardly along a downwardly, rearwardly sloping fold line and presenting an inwardly sloping knife-like edge for penetrating a joist forced against the tabs, the tabs forming downwardly, rearwardly sloping surfaces for urging a joist forced against the tabs against the back of the hanger.
Claim 12
Dependent Claim
38 words
The improved joist hanger according to claim 9 wherein the fold line extends from the base of a slit in the side to a point on the front edge of the sidewall above the base of the slit.
Claim 13
Dependent Claim
20 words
The improved joist hanger according to claim 10 wherein the slit extends substantially parallel to the bottom of the hanger.
Claim 14
Dependent Claim
39 words
The improved joist hanger according to claim 8 wherein the slit slopes generally upwardly and rearwardly in the side, defining a generally triangular tab having an acute angle at the apex of the tab which extends into the channel.
Claim 15
Dependent Claim
22 words
The improved joist hanger according to claim 9 wherein there are two pairs of opposing tabs, one pair spaced above the other.
Claim 16
Dependent Claim
139 words
A joist hanger of the type comprising an upright back, parallel opposing sides forming a channel for receiving a joist and a horizontal bottom extending forwardly from the back forming a seat for the joist, and a horizontal top flange extending rearwardly from the back and adapted for engagement with a carrying member, the hanger comprising slits in the side and at least one pair of opposing tabs extending inwardly from the sides of the hanger into the channel, the tabs being formed by the portions of the sides above the slit being folded inwardly along a downwardly rearwardly sloping fold line, the tabs presenting an inwardly sloping knife-like edges for penetrating a joist forced against the tabs, the tabs forming downwardly, rearwardly sloping surfaces for urging a joist forced against the tabs against the back of the hanger.
Claim 17
Dependent Claim
139 words
A joist hanger of the type comprising an upright back, parallel opposing sides forming a channel for receiving a joist and a horizontal bottom extending forwardly from the back forming a seat for the joist, and a horizontal top flange extending rearwardly from the back and adapted for engagement with a carrying member, the hanger comprising slits in the side and at least one pair of opposing tabs extending inwardly from the sides of the hanger into the channel, the tabs being formed by the portions of the sides above the slit being folded inwardly along a downwardly rearwardly sloping fold line, the tabs presenting an inwardly sloping knife-like edges for penetrating a joist forced against the tabs, the tabs forming downwardly, rearwardly sloping surfaces for urging a joist forced against the tabs against the back of the hanger.
Claim 18
Dependent Claim
22 words
The joist hanger according to claim 14 wherein the slits in the sides are substatially parallel to the seat of the hanger.
Claim 19
Dependent Claim
128 words
An improved saddle-type joist hanger of the type comprising two oppositely-facing joist hangers, each comprising an upright back, parallel opposing sides forming a channel for receiving a joist and a horizontal bottom extending forwardly from the back forming a seat for the joist, and a web connecting the top edges of the hangers, the improvement comprising: at least one pair of opposing tabs extending inwardly from the sides of each hanger into the channel, each tab formed by a portion of the side folded inwardly along a downardly, rearwardly sloping fold line and presenting an inwardly sloping knife-like edge for penetrating a joist forced against the tabs, the tabs forming downwardly, rearwardly sloping surfaces for urging a joist forced against the tabs against the back of the hanger.
Claim 20
Dependent Claim
128 words
An improved saddle-type joist hanger of the type comprising two oppositely-facing joist hangers, each comprising an upright back, parallel opposing sides forming a channel for receiving a joist and a horizontal bottom extending forwardly from the back forming a seat for the joist, and a web connecting the top edges of the hangers, the improvement comprising: at least one pair of opposing tabs extending inwardly from the sides of each hanger into the channel, each tab formed by a portion of the side folded inwardly along a downardly, rearwardly sloping fold line and presenting an inwardly sloping knife-like edge for penetrating a joist forced against the tabs, the tabs forming downwardly, rearwardly sloping surfaces for urging a joist forced against the tabs against the back of the hanger.
Claim 21
Dependent Claim
38 words
The improved joist hanger according to claim 16 wherein the fold line extends from the base of a slit in the side to a point on the front edge of the sidewall above the base of the slit.
Claim 22
Dependent Claim
20 words
The improved joist hanger according to claim 16 wherein the slit extends substantially parallel to the bottom of the hanger.
Claim 23
Dependent Claim
39 words
The improved joist hanger according to claim 17 wherein the slit slopes generally upwardly and rearwardly in the side, defining a generally triangular tab having an acute angle at the apex of the tab which extends into the channels.
Claim 24
Dependent Claim
22 words
The improved joist hanger according to claim 16 wherein there are two pairs of opposing tabs, one pair spaced above the other.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-02-07 | 1992-08-08 | 1993-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-02-07 | 1996-08-08 | 1997-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-02-07 | 2000-08-08 | 2001-02-07 | $7700.00 | Window Closed / Lapsed |